WO2011129203A1 - Light-emitting device - Google Patents

Light-emitting device Download PDF

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Publication number
WO2011129203A1
WO2011129203A1 PCT/JP2011/058423 JP2011058423W WO2011129203A1 WO 2011129203 A1 WO2011129203 A1 WO 2011129203A1 JP 2011058423 W JP2011058423 W JP 2011058423W WO 2011129203 A1 WO2011129203 A1 WO 2011129203A1
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WO
WIPO (PCT)
Prior art keywords
light emitting
light
emitting device
wiring portion
mounting region
Prior art date
Application number
PCT/JP2011/058423
Other languages
French (fr)
Japanese (ja)
Inventor
玄明 笹野
Original Assignee
日亜化学工業株式会社
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Filing date
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Application filed by 日亜化学工業株式会社 filed Critical 日亜化学工業株式会社
Publication of WO2011129203A1 publication Critical patent/WO2011129203A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
    • H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
    • H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
    • H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
    • H01L25/0753—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00 the devices being arranged next to each other
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
    • H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/481—Disposition
    • H01L2224/48135—Connecting between different semiconductor or solid-state bodies, i.e. chip-to-chip
    • H01L2224/48137—Connecting between different semiconductor or solid-state bodies, i.e. chip-to-chip the bodies being arranged next to each other, e.g. on a common substrate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/58—Optical field-shaping elements
    • H01L33/60—Reflective elements

Definitions

  • the present invention relates to a light emitting device that can be used as a lighting source such as an LED bulb, a display device, a display, a backlight light source of a liquid crystal display, and the like.
  • LEDs light emitting diodes
  • Patent Document 1 a base on which a plurality of light emitting diode elements are mounted, a printed circuit board disposed on the upper surface of the base, and a region on which the plurality of light emitting diode elements are mounted are sandwiched between the printed circuit boards.
  • a light-emitting diode light source unit including a cathode and an anode terminal electrode.
  • JP 2006-295085 A Japanese Patent Laying-Open No. 2010-034487 (see FIG. 7B)
  • a light emitting device in which several tens of light emitting elements are arranged on a substrate has been actively developed.
  • the light-emitting device cannot be driven due to the capacity and output voltage of the power source connected to the light-emitting device, the voltage needs to be boosted, The problem that becomes worse occurs.
  • a power supply with an output voltage of 30 V is preferably used, and when a power supply with an output voltage of 20 V is used, the voltage is boosted and driven. If a power supply with an output voltage of 60V is used, the light emission efficiency is deteriorated.
  • a light emitting device suitable for the capacity of a power source connected to the light emitting device is desired, and in a light emitting device in which a plurality of light emitting elements are arranged, it depends on how many light emitting elements are connected in series. become.
  • there is a limit to the size of the light-emitting device and the number of light-emitting elements connected in series provided in a light-emitting device of a certain size is also limited, as brightness improvement is required.
  • the present invention has been made in view of the above-described problems, and provides a light-emitting device suitable for a power source having various capacities and output voltages, can increase the number of series connections, and can extract light efficiently. It is an object of the present invention to provide a light emitting device improved in the above.
  • a light-emitting device includes a substrate, a light-emitting unit including a plurality of light-emitting elements arranged in a mounting region on the substrate, and a pad unit and a wiring unit,
  • a light emitting device comprising: a positive electrode and a negative electrode that apply a voltage to the light emitting unit through the wiring unit; and a light reflecting resin formed on the substrate so as to cover at least the wiring unit, wherein the mounting region A relay wiring portion is formed along the periphery of the, and the relay wiring portion is covered with the light reflecting resin.
  • the number of light emitting elements connected in series via the relay wiring portion can be increased and the loss of emitted light can be reduced within a limited area of the mounting region.
  • a light emitting device with improved light extraction efficiency can be obtained.
  • the plurality of light-emitting elements each include a p-electrode formed on one side and an n-electrode formed on the other side, and the plurality of light-emitting elements are connected to the relay wiring portion with respect to the p-electrode. It is preferable to include a light emitting element connected to the electrode and a light emitting element connected to the n electrode.
  • the light emitting elements connected in series from the positive electrode and the light emitting elements connected in series toward the negative electrode can be connected via the relay wiring portion, and the light emitting devices connected in series as the light emitting device.
  • the number of elements can be increased.
  • a plurality of light emitting elements can be densely arranged, and a light emitting device with improved power consumption with respect to constant luminance or light emission with respect to constant power consumption. A light-emitting device with improved efficiency can be obtained.
  • the p-electrode is arranged so as to face one direction with respect to the mounting region between the positive wiring portion and the relay wiring portion, and between the negative wiring portion and the relay wiring portion. It is preferable that the p electrodes are arranged so as to face the other direction with respect to the mounting region.
  • the relay wiring portion is formed along the periphery of the mounting area, and the light emitting elements are arranged so that the direction is reversed with the relay wiring portion as a boundary, thereby connecting the light emitting elements to each other.
  • the number of light emitting elements connected in series via the relay wiring portion can be increased within a limited area of the mounting region without complicating the wiring to be performed.
  • a plurality of light emitting elements can be densely arranged, and a light emitting device with improved power consumption with respect to constant luminance or light emission with respect to constant power consumption. A light-emitting device with improved efficiency can be obtained.
  • a plurality of the relay wiring portions are provided and a part of the plurality of light emitting elements is sandwiched between the two relay wiring portions.
  • the wiring for connecting the light emitting elements does not become complicated via the relay wiring portion, and the light emitting elements are connected in series via the relay wiring portion within a limited area of the mounting area.
  • the number of connections can be increased.
  • a plurality of light emitting elements can be densely arranged, and a light emitting device with improved power consumption with respect to constant luminance or light emission with respect to constant power consumption. A light-emitting device with improved efficiency can be obtained.
  • the light-emitting device preferably has a configuration in which the plurality of light-emitting elements are electrically connected in series and in parallel with each other by wires.
  • the light emitting device preferably has a configuration in which the reflective resin is formed so as to surround the mounting area.
  • the light reflecting resin so as to surround the periphery of the mounting region, the light toward the periphery of the mounting region of the substrate can also be reflected by the light reflecting resin. Accordingly, loss of emitted light can be reduced, and light extraction efficiency of the light emitting device can be improved.
  • the light emitting device preferably has a configuration in which a metal film is formed on the mounting region, and the plurality of light emitting elements are arranged via the metal film.
  • the light emitting device preferably has a configuration in which the light reflecting resin is formed so as to cover a part of the periphery of the mounting region.
  • the light reflecting resin so as to cover a part of the periphery of the mounting region, a region where the substrate is exposed is formed between the wiring portion and the metal film on the mounting region. None will happen. Therefore, since all the light emitted from the light emitting element can be reflected in the inner region where the light reflecting resin is formed, the loss of the emitted light can be reduced to the maximum, and the light extraction efficiency of the light emitting device can be reduced. Can be further improved.
  • the number of light emitting elements connected in series via the relay wiring portion can be increased and the loss of emitted light can be reduced within a limited area of the mounting area. And a light emitting device with improved light extraction efficiency can be obtained.
  • the p-electrode and the n-electrode (see FIG. 3) of the light-emitting element are arranged at four locations on the mounting area or 6 to indicate the direction of each light-emitting element. Only the portions are illustrated, and illustration is omitted in other portions on the mounting area.
  • the light emitting device 101 according to the first embodiment will be described in detail with reference to FIGS. In the following description, the overall configuration of the light emitting device 101 is described first, and then each configuration is described.
  • the light reflecting resin 6 in FIGS. 2 and 5 is shown in a state in which only the outer shape is shown by lines and transmitted. 6 to 8 described in other embodiments are also shown in a transparent state.
  • the light emitting device 101 is a device used for a lighting device such as an LED bulb, a display device, a display, a backlight light source of a liquid crystal display, or the like. As shown in FIGS. 1, 2, and 4, the light emitting device 101 includes a substrate 1, a plurality of light emitting elements 2 arranged in a mounting region 1 a of the substrate 1, and a positive electrode 3 and a negative electrode 4 formed on the substrate 1. And the relay wiring portion 8 formed separately from the positive electrode 3 and the negative electrode 4, the electronic components such as the light emitting element 2, the positive electrode 3, the negative electrode 4, the relay wiring portion 8 and the light emitting element 2, and the light emitting elements 2 to each other. A wire W to be connected and a light reflecting resin 6 formed on the substrate 1 are provided as main components.
  • the light emitting device 101 has a configuration in which the light reflecting resin 6 is used as a peripheral edge and the sealing member 7 is filled therein.
  • the substrate 1 is for arranging electronic components such as the light emitting element 2. As shown in FIGS. 1 and 2, the substrate 1 is formed in a rectangular flat plate shape. On the substrate 1, a mounting region 1 a for arranging a plurality of light emitting elements 2 is defined as shown in FIG. 2.
  • the size of the substrate 1 is not particularly limited, and can be appropriately selected according to the purpose and application such as the number of the light emitting elements 2.
  • an insulating material is preferably used, and a material that hardly transmits light emitted from the light-emitting element 2, external light, or the like is preferably used. Moreover, it is preferable to use a material having a certain degree of strength. Specific examples include ceramics (Al 2 O 3 , AlN, etc.), phenol resins, epoxy resins, polyimide resins, BT resins (bismaleimide triazine resin), polyphthalamide (PPA), and the like.
  • the mounting area 1 a is an area for arranging a plurality of light emitting elements 2. As shown in FIG. 2, the mounting area 1 a is partitioned into a central area of the substrate 1.
  • the mounting region 1a is formed in a predetermined shape having sides facing each other, and more specifically, is formed in a substantially rectangular shape with rounded corners as shown in FIG.
  • the size of the mounting region 1a is not particularly limited, and can be appropriately selected according to the purpose and application such as the number of light emitting elements 2 and the arrangement interval.
  • a part of the wiring part 3b and a part of the wiring part 4b are formed around the mounting area 1a along the left side of the mounting area 1a in the front view of FIG.
  • a part of the wiring part 4b is formed along the side of the wiring
  • the relay wiring part 8 is formed along the right side of the mounting region 1a.
  • the periphery of the mounting region 1a means a periphery at a predetermined interval from the periphery of the mounting region 1a, as shown in FIG.
  • the mounting region 1a may be a region partitioned on the substrate 1 for arranging the plurality of light emitting elements 2, that is, a region made of the same material as the substrate 1, but for example, reflects light on the mounting region 1a. It is preferable to form a metal film and arrange a plurality of light emitting elements 2 through the metal film. Thus, by forming the metal film on the mounting region 1a and arranging the plurality of light emitting elements 2 thereon, the light emitted from the light emitting element 2 is also directed toward the mounting region 1a of the substrate 1. It can be reflected by the metal film. Accordingly, loss of emitted light can be reduced, and light extraction efficiency of the light emitting device 101 can be improved.
  • the metal film formed on the mounting region 1a is preferably formed by electrolytic plating or electroless plating.
  • the material of the metal film is not particularly limited as long as it can be plated.
  • Ag (silver) or Au (gold) is preferably used, and Ag (silver) is particularly preferably used.
  • Au has a characteristic of easily absorbing light.
  • the light reflectance can be increased by further forming a TiO 2 film on the surface of Au plating.
  • the light extraction efficiency of the light-emitting device 101 can be improved compared to plating with Au alone.
  • the thickness of the metal film formed on the mounting region 1a is not particularly limited and can be appropriately selected according to the purpose and application.
  • a sealing member 7 to be described later is filled in the upper portion of the mounting region 1 a, and the plurality of light emitting elements 2 on the mounting region 1 a and the plurality of light emitting elements 2 are included.
  • the wire W connected to is protected from dust, moisture, external force and the like.
  • the light emitting element 2 is a semiconductor element that emits light by applying a voltage. As shown in FIG. 2, a plurality of light emitting elements 2 are arranged in the mounting region 1 a of the substrate 1, and the plurality of light emitting elements 2 together constitute a light emitting unit 20 of the light emitting device 101.
  • the light emitting element 2 is bonded to the mounting region 1a by a bonding member (not shown).
  • a bonding method for example, a bonding method using resin or solder paste as the bonding member can be used.
  • the illustrated light emitting unit 20 simply indicates a region where the light emitting element 2 is placed, and it is needless to say that light emission in the light emitting unit is light emitted from the light emitting element 2.
  • each of the light emitting elements 2 is formed in a rectangular shape as shown in FIG.
  • the light emitting element 2 is a face-up (FU) element in which a p electrode 2 ⁇ / b> A is provided on one side of the upper surface and an n electrode 2 ⁇ / b> B is provided on the other side of the light emitting element 2.
  • the metal film on which the light emitting element 2 is placed and the metal members constituting the positive electrode 3 and the negative electrode 4 are arranged apart from each other.
  • the n-electrode are preferably mounted on the mounting region 1a where the surface of the light-emitting element 2 opposite to the electrode-forming surface is a metal film. As shown in FIG.
  • the p electrode 2A and the n electrode 2B are auxiliary electrodes for diffusing the current supplied to the light emitting element 2 and the p pad electrode 2Aa and the n pad electrode 2Ba which are electrode terminals.
  • Each of the extending conductive portions 2Ab and 2Bb is provided.
  • the light emitting element at least the p pad electrode 2Aa and the n pad electrode 2Ba need only be on the same surface side, and the extended conductive portions 2Ab and 2Bb need not be provided.
  • the light emitting element 2 has a structure in which a plurality of semiconductor layers including an n-type semiconductor layer and a p-type semiconductor layer are stacked in a side view.
  • a light-emitting diode is preferably used as the light-emitting element 2, and a light-emitting element having an arbitrary wavelength can be selected according to the application.
  • a light-emitting element having an arbitrary wavelength can be selected according to the application.
  • ZnSe a nitride-based semiconductor (In X Al Y Ga 1-XY N, 0 ⁇ X , 0 ⁇ Y, X + Y ⁇ 1), GaP, or the like
  • the red light emitting element 2 (light having a wavelength of 620 nm to 750 nm), GaAlAs, AlInGaP, or the like can be used.
  • a nitride semiconductor In X Al Y Ga 1 capable of emitting light of a short wavelength that can efficiently excite the fluorescent material.
  • -XYN, 0 ⁇ X, 0 ⁇ Y , X + Y ⁇ 1 are preferably used.
  • the component composition, emission color, size, and the like of the light emitting element 2 are not limited to the above, and can be appropriately selected according to the purpose.
  • the light emitting element 2 can also be comprised with the element which outputs not only the light of a visible light range but an ultraviolet-ray and infrared rays. In order to increase the output, the number of light emitting elements 2 is preferably in the range of, for example, 10 or more and 20 to 150.
  • the light emitting elements 2 are arranged at equal intervals in the vertical direction and the horizontal direction on the mounting area 1a. Here, a total of 40 light emitting elements 8 ⁇ 5 horizontal elements are arranged. Yes.
  • the light emitting elements 2 are connected in series by electrically connecting the light emitting elements 2 adjacent to each other in the horizontal direction with respect to the mounting region 1a by a conductive wire W.
  • the series connection means a state in which the p-electrode 2A and the n-electrode 2B in the adjacent light-emitting elements 2 are electrically connected by the wire W as shown in FIG.
  • the light emitting elements 2 are electrically connected by the conductive wires W between the light emitting elements 2 adjacent in the lateral direction with respect to the mounting region 1 a, and are connected not only in series but also in parallel.
  • the parallel connection here means the state in which the p electrodes 2A or the n electrodes 2B in the adjacent light emitting elements 2 are electrically connected by a wire W as shown in FIG.
  • Vf forward voltage drop
  • the light emitting element directly connected with wiring part 3b, 4b and the relay wiring part 8 is shown.
  • the two are preferably not connected in parallel. That is, in the light emitting device 101, the p-electrode 2A of the light emitting element 2 in the first row, first column, and second row, first column on the mounting region 1a directly connected to the wiring portion 3b is not connected in parallel. Further, in the light emitting device 101, the n electrodes 2B of the light emitting elements 2 in the seventh row, first column and the eighth row, first column on the mounting region 1a directly connected to the wiring portion 4b are not connected in parallel.
  • the n-electrodes 2B in the first row, fifth column, second row, fifth column, third row, fifth column, and fourth row, fifth column that are directly connected to the relay wiring portion 8 are connected in parallel. Absent.
  • the p-electrodes 2A in the fifth row, fifth column, the sixth row, fifth column, the seventh row, fifth column, and the eighth row, fifth column that are directly connected to the relay wiring unit 8 are connected in parallel. Absent. Thereby, the load applied by the wire W in the light emitting device 101 can be reduced.
  • the positive electrode 3 and the negative electrode 4 are for electrically connecting electronic components such as the plurality of light emitting elements 2 on the substrate 1 and an external power source (not shown), and applying a voltage from the external power source to these electronic components. belongs to. That is, the positive electrode 3 and the negative electrode 4 play a role as electrodes for energizing from the outside or a part thereof.
  • the positive electrode 3 and the negative electrode 4 are composed of a metal film on the substrate 1 as shown in FIG. As shown in FIG. 2, the positive electrode 3 and the negative electrode 4 have substantially rectangular pad portions (feeding portions) 3a and 4a and linear wiring portions 3b and 4b. The pad portions 3a and 4a The applied voltage is configured to be applied to the light emitting unit 20 including the plurality of light emitting elements 2 through the wiring units 3b and 4b. As shown in FIG. 2, a cathode mark CM indicating the cathode is formed on the wiring portion 4b of the negative electrode 4.
  • the pad portions 3a and 4a are for applying a voltage from an external power source. As shown in FIG. 2, the pad portions 3 a and 4 a are formed as a pair at diagonal positions on the corners on the substrate 1. The pad portions 3a and 4a are electrically connected to an external power source (not shown) by a conductive wire W.
  • the wiring portions 3b and 4b are for transmitting the voltage applied to the pad portions 3a and 4a from the external power source to the light emitting element 2 on the mounting region 1a. As shown in FIG. 2, the wiring portions 3b and 4b are formed so as to extend from the pad portions 3a and 4a, and are formed in a substantially L shape around the mounting region 1a.
  • Au As a material for the metal film constituting the positive electrode 3 and the negative electrode 4. This is because, as will be described later, when Au having excellent thermal conductivity is used as the material of the wire W, the wire W that is the same material can be firmly bonded.
  • the metal film constituting the positive electrode 3 and the negative electrode 4 it is preferable to form the metal film by electrolytic plating or electroless plating in the same manner as the method for forming the metal film on the mounting region 1a.
  • the thickness of the metal film which comprises the positive electrode 3 and the negative electrode 4 is not specifically limited, According to the objectives and uses, such as the number of the wires W, it can select suitably.
  • a part of the wiring portions 3b and 4b is covered with a light reflecting resin 6 to be described later, as shown in FIGS. Therefore, even when the wiring portions 3b and 4b are formed of Au that easily absorbs light as described above, the light emitted from the light emitting element 2 does not reach the wiring portions 3b and 4b and is reflected by light. Reflected by the resin 6. Accordingly, loss of emitted light can be reduced, and light extraction efficiency of the light emitting device 101 can be improved.
  • the wire W can be protected from dust, moisture, external force and the like.
  • the part of the wiring portions 3b and 4b is formed around the mounting region 1a and along the side of the mounting region 1a in the wiring portions 3b and 4b. It means the part that was made.
  • the relay wiring part 8 is for relaying the wiring between the positive electrode 3 and the negative electrode 4. That is, the relay wiring portion 8 is connected to at least one of the plurality of light emitting elements 2 and the p electrode of the light emitting element 2, and is connected to at least one of the plurality of light emitting elements 2 and the n electrode of the light emitting element 2. Thus, the wiring between the positive electrode 3 and the negative electrode 4 is relayed.
  • the relay wiring portion 8 is composed of a metal member on the substrate 1.
  • the relay wiring portion 8 is formed in a straight line around one side of the mounting area 1a, that is, the right side, around the mounting area 1a.
  • the relay wiring portion 8 is covered with a light reflecting resin 6 described later. Therefore, as will be described later, even when Au that easily absorbs light is used as the metal film constituting the relay wiring portion 8, the light emitted from the light emitting element 2 does not reach the relay wiring portion 8. Reflected by the light reflecting resin 6. Accordingly, loss of emitted light can be reduced, and light extraction efficiency of the light emitting device 101 can be improved. Furthermore, by covering the relay wiring part 8 with the light reflecting resin 6, the relay wiring part 8 can be protected from dust, moisture, external force and the like.
  • the material of the metal film constituting the relay wiring portion 8 it is preferable to use Au similarly to the positive electrode 3 and the negative electrode 4. This is because, as will be described later, when Au having excellent thermal conductivity is used as the material of the wire W, the wire W that is the same material can be firmly bonded.
  • the metal film constituting the relay wiring portion 8 As a method for forming the metal film constituting the relay wiring portion 8, it is preferable to form the metal film by electrolytic plating or electroless plating similarly to the positive electrode 3 and the negative electrode 4.
  • the thickness of the metal film which comprises the relay wiring part 8 is not specifically limited, It can select suitably according to the objectives and uses, such as the number of the wires W.
  • the p electrodes 2 ⁇ / b> A of the plurality of light emitting elements 2 are mounted in the mounting region 1 a.
  • the n electrodes 2B of the plurality of light emitting elements 2 are arranged so as to face the right side, which is the other direction of the mounting region 1a.
  • the light emitting element 2 has a right side in which the p electrodes 2A of the plurality of light emitting elements 2 are in the other direction of the mounting region 1a between the wiring part 4b of the negative electrode 4 and the relay wiring part 8.
  • the n electrodes 2B of the plurality of light emitting elements 2 are arranged so as to face the left side, which is one direction of the mounting region 1a. That is, the light emitting element 2 is arranged so that the direction is reversed with respect to the center of the relay wiring portion 8 in the upper group (region) and the lower group (region) in the plan view of FIG. Yes.
  • the relay wiring portion 8 is formed along the periphery of the mounting region 1a in this way, and the light emitting element 2 is turned so that the direction is reversed with the center of the relay wiring portion 8 as a boundary.
  • the number of light emitting elements connected in series can be increased without complicating the wiring for connecting the light emitting elements within the limited area of the mounting region 1a.
  • a plurality of light emitting elements can be densely arranged, and a light emitting device with improved power consumption with respect to constant luminance or light emission with respect to constant power consumption. A light-emitting device with improved efficiency can be obtained.
  • ten light emitting elements 2 are connected in series, and the series connection is formed for four rows.
  • one end of the wiring part 3b and one end of the wiring part 4b are formed adjacent to each other around the mounting region 1a.
  • the wiring portions 3b and 4b of the positive electrode 3 and the negative electrode 4 are formed along the periphery of the mounting region 1a, and one end portions thereof are formed adjacent to each other, so that a plurality of light emitting elements like the light emitting device 101 are formed.
  • a protective element 5 described later can be disposed at an appropriate position. Therefore, it is possible to prevent the voltage between the positive and negative electrodes from becoming equal to or higher than the zener voltage, and to appropriately prevent element destruction and performance deterioration of the light emitting element 2 due to application of an excessive voltage. .
  • the wiring portions 3b and 4b are preferably formed such that one end portions thereof are adjacent to each other within the range of one side of the substantially rectangular mounting region 1a shown in FIG. In this manner, the wiring portions 3b and 4b are formed so as to be adjacent to each other within the range of one side of the mounting region 1a, thereby installing the wires W for electrically connecting the wiring portions 3b and 4b and the light emitting element 2.
  • An area can be secured. Therefore, the number of the light emitting elements 2 connected to the wiring portions 3b and 4b, that is, the number of the light emitting elements 2 serving as the start point and the end point of the series connection can be increased. Can be increased without complicating the wiring connecting the light emitting elements.
  • a plurality of light emitting elements can be densely arranged within a limited area of the mounting area, and power consumption is improved for a certain luminance.
  • a light-emitting device or a light-emitting device with improved light emission efficiency with respect to constant power consumption can be obtained.
  • the light emitting device 102 shown in FIG. 5 may be used as a form in which one end portion of the wiring portion 3b and one end portion of the wiring portion 4b are adjacent to each other around the mounting region 1a.
  • one end portions of the wiring portions 3b and 4b are formed adjacent to each other at the corners of the substantially rectangular mounting region 1a. That is, the wiring part 3b is formed in a substantially L shape so as to extend from the pad part 3a to the corner part of the mounting region 1a.
  • the wiring part 4b is formed in a straight line so as to extend from the pad part 4a to the corner of the mounting region 1a. Note that in the light-emitting device 102 illustrated in FIG. 5, the same components as those of the light-emitting device 101 are denoted by the same reference numerals and description thereof is omitted.
  • the light emitting device 101 includes the positive electrode 3, the negative electrode 4, and the relay wiring portion 8 along the periphery of the mounting region 1 a, and the positive electrode 3, the negative electrode 4, the relay wiring portion 8, and the mounting region 1 a on the substrate 1. And spaced apart.
  • the light emitting device 101 uses a material (for example, Au) that can be firmly bonded to the wire W for the positive electrode 3, the negative electrode 4, and the relay wiring portion 8, and has a light reflectance in the mounting region 1 a. Since it is possible to use a material having a high level (for example, Ag), a highly reliable light-emitting device with improved light extraction efficiency can be obtained.
  • the light reflecting resin 6 is for reflecting the light emitted from the light emitting element 2. As shown in FIG. 2, the light reflecting resin 6 is formed so as to cover a part of the wiring portions 3b and 4b, the relay wiring portion 8, the protective element 5 described later, and the wire W connected thereto. Therefore, even when the wiring portions 3b and 4b, the relay wiring portion 8 and the wire W are formed of Au that easily absorbs light as described above or later, light emitted from the light emitting element 2 is transmitted to the wiring portion 3b. , 4b, the relay wiring portion 8 and the wire W are not reflected and are reflected by the light reflecting resin 6. Accordingly, loss of emitted light can be reduced, and light extraction efficiency of the light emitting device 101 can be improved. Furthermore, by covering a part of the wiring portions 3b and 4b, the relay wiring portion 8, the protection element 5 and the wire W connected thereto with the light reflecting resin 6, these members are protected from dust, moisture, external force and the like. be able to.
  • the light reflecting resin 6 is preferably formed in a square frame shape so as to surround the mounting region 1 a where the light emitting part 20 is formed on the substrate 1.
  • the mounting region 1a of the substrate 1 is, for example, light emitted from the light emitting elements 2 arranged on the left and right sides in FIG.
  • the light directed to the surroundings can also be reflected by the light reflecting resin 6. Accordingly, loss of emitted light can be reduced, and light extraction efficiency of the light emitting device 101 can be improved.
  • the light reflecting resin 6 is preferably formed so as to cover a part of the region that becomes the periphery of the mounting region 1a.
  • the light reflecting resin 6 so as to cover a part of the periphery of the mounting region 1a, a region where the substrate 1 is exposed between the wiring portions 3b and 4b and the metal film on the mounting region 1a is formed. It will not be formed. Therefore, since all the light emitted from the light emitting element 2 can be reflected in the inner region where the light reflecting resin 6 is formed, the loss of the emitted light can be reduced to the maximum, and the light emitted from the light emitting device 101 can be reduced. The taking-out efficiency can be further improved.
  • an insulating material is preferably used as a material of the light reflecting resin 6.
  • a thermosetting resin, a thermoplastic resin, or the like can be used. More specifically, a phenol resin, an epoxy resin, a BT resin, PPA, a silicon resin, etc. are mentioned.
  • a reflective member for example, TiO 2 , Al 2 O 3 , ZrO 2 , MgO or the like that hardly absorbs light from the light-emitting element 2 and has a large refractive index difference with respect to the base resin is used in the base resin. By dispersing this powder, light can be reflected efficiently.
  • the size of the light reflecting resin 6 is not particularly limited, and can be appropriately selected according to the purpose and application.
  • a light reflecting member made of a material different from the resin can be formed at the position of the light reflecting resin 6.
  • the sealing member 7 is a member for protecting the light emitting element 2, the protective element 5, the wire W, and the like disposed on the substrate 1 from dust, moisture, external force, and the like. As shown in FIGS. 1, 2, and 4, the sealing member 7 is formed by filling a resin in the mounting region 1 a surrounded by the light reflecting resin 6 on the substrate 1.
  • the material of the sealing member 7 a material having translucency capable of transmitting light from the light emitting element 2 is preferable.
  • the material include silicon resin, epoxy resin, and urea resin.
  • a colorant, a light diffusing agent, a filler, a fluorescent member, and the like can be contained as desired.
  • the sealing member 7 can be formed as a single member or can be formed as a plurality of layers of two or more layers.
  • the filling amount of the sealing member 7 may be an amount that covers the light emitting element 2, the protective element 5, the wire W, and the like disposed in the mounting region 1 a surrounded by the light reflecting resin 6. Further, when the sealing member 7 has a lens function, the surface of the sealing member 7 may be raised so as to have a bullet shape or a convex lens shape.
  • the sealing member 7 may include a fluorescent member that emits light having a different wavelength by absorbing at least a part of the light from the light emitting element 2 as a wavelength conversion member.
  • the fluorescent member one that converts light from the light emitting element 2 into a longer wavelength is preferable.
  • the fluorescent member may be formed as a single layer of one type of fluorescent material or may be formed as a single layer by mixing two or more types of fluorescent materials.
  • two or more single layers containing one kind of fluorescent substance or the like may be laminated, or two or more single layers each containing two or more kinds of fluorescent substances may be laminated.
  • a YAG phosphor mixed with yttrium, aluminum and garnet a nitride phosphor or an oxynitride phosphor mainly activated by a lanthanoid element such as Eu or Ce is used. be able to.
  • the wire W is a conductive wiring for electrically connecting electronic components such as the light emitting element 2 and a protective element 5 described later to the positive electrode 3, the negative electrode 4, the relay wiring portion 8, and the like.
  • Examples of the material of the wire W include those using metals such as Au, Cu (copper), Pt (platinum), and Al (aluminum), and alloys thereof, and in particular, excellent in thermal conductivity and the like. It is preferable to use Au.
  • the diameter of the wire W is not specifically limited, It can select suitably according to the objective and a use.
  • connection portion between the wire W and the positive electrode 3, the negative electrode 4, and the relay wiring portion 8 is covered with a light reflecting resin 6, as shown in FIG. Therefore, as described above, even when Au, which easily absorbs light, is used as the material constituting the wire W, the light emitted from the light emitting element 2 is not absorbed by the wire W, but the light reflecting resin 6 Is reflected by. Accordingly, loss of emitted light can be reduced, and light extraction efficiency of the light emitting device 101 can be improved. Furthermore, by covering the connection portion between the wire W and the positive electrode 3, the negative electrode 4, and the relay wiring portion 8 with the light reflecting resin 6, the wire W can be protected from dust, moisture, external force, and the like.
  • the protection element 5 is formed as an element for protecting the light emitting unit 20 composed of the plurality of light emitting elements 2 from element destruction and performance deterioration due to excessive voltage application. As shown in FIG. 2, the protective element 5 is disposed at one end of the wiring portion 3 b of the positive electrode 3 and is connected to one end of the wiring portion 4 b of the negative electrode 4 by a wire. However, the protective element 5 may be disposed at one end of the wiring portion 4b of the negative electrode 4 and connected to one end of the wiring portion 3b of the positive electrode 3 by a wire.
  • the protection element 5 is configured by a Zener diode that is energized when a voltage higher than a specified voltage is applied.
  • the protective element 5 is a semiconductor element having a p-electrode and an n-electrode like the light-emitting element 2 described above, and is antiparallel to the p-electrode 2A and the n-electrode 2B of the light-emitting element 2.
  • the wire W is electrically connected to the wiring portion 4 b of the negative electrode 4.
  • the light emitting element 2 cannot be disposed in the vicinity of the place where the protective element 5 is embedded. Therefore, the light emitting element 2 in the fourth row and the first column closest to the protection element 5 is connected by a wire W to a place away from the area where the protection element 5 is embedded, as shown in FIG.
  • the protective element 5 Due to the presence of the protective element 5, even if an excessive voltage is applied between the positive electrode 3 and the negative electrode 4 and the voltage exceeds the Zener voltage of the Zener diode, the Zener voltage between the positive and negative electrodes of the light emitting element 2 is maintained. And does not exceed this Zener voltage. Therefore, by providing the protective element 5, it is possible to prevent the voltage between the positive and negative electrodes from becoming a Zener voltage or higher, and the occurrence of element destruction or performance deterioration of the light emitting element 2 due to application of an excessive voltage. Can be prevented appropriately.
  • the protective element 5 is covered with a light reflecting resin 6 as shown in FIG. Therefore, the protection element 5 and the wire W connected to the protection element 5 are protected from dust, moisture, external force, and the like.
  • the size of the protective element 5 is not particularly limited, and can be appropriately selected according to the purpose and application.
  • the light from the light emitting element 2 is extracted efficiently. Further, since the light emitting device 101 can increase the number of light emitting elements 2 connected in series by the relay wiring unit 8, the power consumption can be improved for a certain luminance, or the constant power consumption can be increased. Luminous efficiency can be improved. Therefore, the light-emitting device 101 can have a configuration suitable for power supplies with various capacities and output voltages.
  • the manufacturing method of the light emitting device 101 includes a substrate manufacturing process, a plating process, a die bonding process, a wire bonding process, and a light reflecting resin forming process. Moreover, you may include the sealing member filling process after the light reflection resin formation process. Furthermore, a protection element joining process is included here. Hereinafter, each step will be described. Note that since the configuration of the light emitting device 101 is as described above, the description thereof will be omitted as appropriate.
  • substrate preparation process is a process of producing the board
  • the mounting region 1a on the substrate 1 and the portions to be the positive electrode 3 and the negative electrode 4 are formed by patterning into a predetermined shape. Further, in the substrate manufacturing process, a plating wiring for forming a metal film on the mounting region 1a on the substrate 1 is formed by electrolytic plating.
  • the plating step is a step of forming at least the positive electrode 3, the negative electrode 4 and the relay wiring portion 8 on the substrate 1 on which the plated wiring is formed, and preferably the positive electrode 3 and the negative electrode 4 by electroless plating. And forming a metal film on the mounting region 1a on the substrate 1 by electrolytic plating.
  • a method in which a metal film on the mounting region 1a is not formed a method in which Au plating is performed on the positive electrode 3, the negative electrode 4, and the relay wiring portion 8 and Ag plating is performed on the mounting region 1a.
  • the die bonding step is a step of placing the light emitting element 2 on the metal film.
  • the light emitting element placement step for placing the light emitting element 2 on the metal film on the substrate 1 via the joining member, and after the light emitting element 2 is placed, the joining member is heated, A heating step of bonding 2 to a metal film on the substrate 1.
  • the protective element joining step is a step of placing the protective element 5 on the wiring portion 3b of the positive electrode 3 and joining them. Since the method for mounting and bonding the protective element 5 is the same as that in the die bonding step, description thereof is omitted here.
  • the wire bonding step is a step of electrically connecting the wiring portion 3b of the positive electrode 3 of the metal member and the p pad electrode 2Aa above the light emitting element 2 with the wire W after the die bonding step. Similarly, this is a step of electrically connecting the n pad electrode 2Ba above the light emitting element 2 and the wiring portion 4b of the negative electrode 4 of the metal member with a wire W. Further, in this step, the plurality of light emitting elements 2 are connected through the p pad electrode 2Aa and the n pad electrode 2Ba, respectively. Further, the electrical connection between the protective element 5 and the negative electrode 4 may be performed in this step. That is, the n electrode of the protection element 5 and the wiring part 4 b of the negative electrode 4 are connected by the wire W. In addition, the connection method of the wire W is not specifically limited, What is necessary is just to perform by the method used normally.
  • the light reflecting resin forming step is a step of forming the light reflecting resin 6 so as to cover at least a part of the wiring portions 3b and 4b and the relay wiring portion 8 along the peripheral edge of the mounting region 1a after the wire bonding step. It is.
  • the light reflecting resin 6 can be formed by using, for example, a resin discharge device that can move (movable) in the vertical direction or the horizontal direction with respect to the substrate 1 above the fixed substrate 1 (see FIG. (See JP2009-182307).
  • the sealing member filling step is a step of filling a light-transmitting sealing member 7 covering the light emitting element 2 and the metal film inside the light reflecting resin 6. That is, the sealing member 7 that covers the light emitting element 2, the protective element 5, the metal film on the mounting region 1 a, the wire W, and the like is formed inside the wall portion made of the light reflecting resin 6 formed on the substrate 1. Is then cured by heating, light irradiation, or the like.
  • the light emitting device 103 according to the second embodiment will be described in detail with reference to FIG.
  • the light emitting device 103 is provided with two relay wiring portions 8a and 8b, and the light emitting device 101 according to the first embodiment described above except that the light emitting element 2 is appropriately arranged in the mounting region 1a. It has the same configuration as Therefore, the same components as those of the light emitting device 101 described above are denoted by the same reference numerals and description thereof is omitted.
  • the light emitting device 103 has the same overall configuration (FIG. 1) and light emitting element configuration (FIG. 3) as the above-described light emitting device 101, and thus description thereof is also omitted.
  • the light emitting device 103 is provided with two relay wiring portions, and a part of the plurality of light emitting elements 2 is arranged between two relay wiring portions 8a and 8b. Specifically, in the space between the wiring portion 3b of the positive electrode 3 and the relay wiring portion 8a (hereinafter sometimes referred to as the first relay wiring portion 8a) (the region indicated by 11 in FIG. 6), a plurality of The p electrodes 2A of the light emitting elements 2 are arranged so as to face the left side, which is one direction of the mounting region 1a.
  • the light emitting device 103 is connected to a relay wiring portion (first relay wiring portion) 8a and a relay wiring portion 8b (hereinafter, sometimes referred to as a second relay wiring portion 8b) different from the relay wiring portion 8a.
  • the p electrodes 2A of the plurality of light emitting elements 2 are arranged so as to face the right side, which is the other direction of the mounting region 1a.
  • the light emitting device 103 includes p electrodes of a plurality of light emitting elements 2 between the relay wiring portion (second relay wiring portion) 8b and the wiring portion 4b of the negative electrode 4 (a region indicated by 13 in FIG. 6). 2A is arranged so as to face the left side which is one direction of the mounting area 1a.
  • the light emitting element 2 is arranged so that the direction is reversed with the first relay wiring portion 8a as a boundary and the second relay wiring portion 8b as a boundary when FIG. 6 is viewed in plan. That is, on the mounting area 1a, by providing one each of the areas 11 and 13 where the wiring parts 3b and 4b and the relay wiring part face each other and increasing the number of areas 12 where the relay wiring parts face each other, In addition, the number of light emitting elements connected in series and the number of series connected columns can be increased.
  • the number of light emitting elements 2 connected in series is increased within a limited area of the mounting region 1a. be able to. Furthermore, within a limited area of the mounting region 1a, a plurality of light emitting elements 2 can be densely arranged, and a light emitting device with improved power consumption with respect to constant luminance, or with respect to constant power consumption. Thus, a light emitting device with improved luminous efficiency can be obtained.
  • the first relay wiring portion 8a and the second relay wiring are also connected in series with the portion 8b, and the six light emitting elements 2 are also connected in series between the second relay wiring portion 8b and the wiring portion 4b.
  • 18 light emitting elements 2 are connected in series.
  • the number Y of relay wiring portions (having at least one relay wiring portion, where Y is positive)
  • the light emitting device 104 includes a protective element wiring portion 9 for connecting the protective element 5 and the protective element, and other than the arrangement state of the light emitting elements 2 and the connection state of the wires W connected to the light emitting elements 2.
  • the light-emitting device 104 has the same overall configuration (FIG. 1) and light-emitting element configuration (FIG. 2B) as the above-described light-emitting device 101, and thus description thereof is also omitted.
  • the light emitting device 104 is obtained by providing the protective element 5 to the light emitting device 103 according to the second embodiment.
  • a protective element 5 made of a Zener diode is formed on the wiring part 3b of the positive electrode 3, and is used to electrically connect the protective element 5 to the negative electrode 4 around the mounting region 1a and further outside the relay wiring part 8a.
  • the protection element wiring part 9 is provided, and the protection element 5 and the protection element wiring part 9 are connected by a wire W, and the protection element wiring part 9 and the wiring part 4b of the negative electrode 4 are connected by a wire W, respectively.
  • the protective element 5, the protective element wiring portion 9, and the wire W connected thereto are covered with the light reflective resin 6.
  • These members can also be protected from dust, moisture, external force, etc. by covering them with the light-reflective resin 6 that covers the wiring parts 3b, 4b and the relay wiring parts 8a, 8b.
  • the protective element wiring portion 9 is formed of the same metal material as the positive electrode 3, the negative electrode 4, and the relay wiring portions 8a and 8b, and may be formed of the same metal material or provided in the same process in the manufacturing method. Good.
  • the protective element 5 is provided in the wiring part 4b of the negative electrode 4, and the protective element 5 and the protective element wiring part 9 are connected by the wire W, and the protective element wiring part 9 and the wiring part 3b of the positive electrode 3 are connected by the wire W, respectively. May be. Furthermore, the protection element 5 is provided on the protection element wiring part 9, and either one of the wiring parts 3 b and 4 b of the positive electrode 3 and the negative electrode 4 is connected to the protection element 5, and the other is connected to the protection element wiring part 9. It may be connected.
  • the protection element wiring portion 9 may be exposed only in a region connected to any one of the wiring portions 4a and 4b and the protection element 5 with a wire, and the other may be wired inside the substrate 1.
  • the protection element wiring portion 9 of the protection element 5 provided on the wiring portion 3b of the positive electrode 3 and a region 9a connected by a wire and the wiring portion 4b of the negative electrode 4 and a region 9b connected by a wire are provided. It only needs to be exposed.
  • the plurality of light emitting elements 2 are arranged such that all the light emitting elements 2 face the upper side where the p-electrode 2A is one direction of the mounting region 1a, or the n-electrode 2B is other than the mounting region 1a. It is arranged so as to face the lower side which is the direction.
  • the light-emitting device 104 of Embodiment 3 includes a region 11 and a region 13 arranged so that the p-electrode 2A (see FIG. 2) of the light-emitting element faces the right side of the mounting region 1a, and the p-electrode 2A of the light-emitting element (see FIG. 2).
  • the light emitting elements 2 Is different from the arrangement of the light emitting elements 2 in the light emitting device 103 of the second embodiment, in which the area 12 arranged so as to face the left side of the mounting area 1a is mixed. They are arranged in a state rotated 90 degrees on the mounting area 1a.
  • the light emitting elements 2 are preferably arranged as in the light emitting device 103 of the second embodiment and the light emitting device 101 of the first embodiment.
  • the light emitting elements 2 can be arranged as in the third embodiment.
  • eight light emitting elements 2 are connected in series in two rows between the wiring portions 3b and 4b and the relay wiring portions 8a and 8b. Are connected in parallel.
  • the light emitting device 105 according to the fifth embodiment will be described in detail with reference to FIG.
  • the light emitting device 105 is substantially the same as the light emitting device 101 according to the first embodiment except for the shape of the mounting region 1a, the shapes of the wiring portions 3b and 4b, and the shape of the relay wiring portion 8. It has a configuration. Therefore, the same components as those of the light emitting device 101 described above are denoted by the same reference numerals and description thereof is omitted.
  • the light emitting device 105 has the same configuration of the light emitting element (FIG. 3) as that of the light emitting device 101 described above, and thus description thereof is also omitted.
  • the mounting region 1a formed in a substantially rectangular shape in the light emitting device 101 is formed in a circular shape as shown in FIG.
  • a plurality of light emitting elements 2 are arranged at equal intervals in the vertical direction and the horizontal direction, respectively.
  • the plurality of light emitting elements 2 are arranged in a maximum of 10 and a minimum of 3 in the vertical direction, and a maximum of 14 and a minimum of 6 in the horizontal direction.
  • a total of 110 are arranged. Further, as shown in FIG.
  • the wiring portions 3 b and 4 b of the positive electrode 3 and the negative electrode 4 are formed along the periphery of the circular mounting region, and the respective one end portions are formed adjacent to each other. .
  • the relay wiring part 8 is also formed along the circumference
  • the light reflecting resin 6 is formed in a circular shape so as to surround the mounting region 1 a where the light emitting portion 20 is formed on the base material 1. Further, the light reflecting resin 6 is formed so as to cover a part of the wiring portions 3b and 4b, the protection element 5 and the wire W connected thereto.
  • symbol AM is an anode mark which shows that the pad part 3a is the positive electrode 3
  • symbol 30 is the metal film formed on the mounting area
  • symbol 70 is the recognition mark for recognizing the bonding position of the light emitting element 2.
  • Reference numeral 80 denotes a temperature measurement point of the light emitting device 105, which is also formed by plating or the like.
  • the wiring portions 3b and 4b of the positive electrode 3 and the negative electrode 4 are formed along the circumference of the circular mounting region 1a, and the center line CL1 is connected via the relay wiring portion 8.
  • the left and right light emitting elements 2 are connected in series, and one end portions of the wiring portions 3b and 4b are formed adjacent to each other, whereby a plurality of light emitting elements 2 are formed in a circular mounting region 1a on the substrate 1 like the light emitting device 105. Even if it is a case where it arrange
  • the light-emitting device 105 can prevent the voltage between the positive and negative electrodes from becoming equal to or higher than the zener voltage, and can appropriately prevent element destruction and performance deterioration of the light-emitting element 2 due to application of an excessive voltage. Can be prevented.
  • the arrangement of the light emitting elements 2 in Embodiment 3 can be applied to the light emitting devices of Embodiment 1 or 2, and the light emitting elements 2 in Embodiment 1 or 2 are applicable. It is also possible to apply this arrangement to the light emitting device of Embodiment 3. Further, the protective element wiring portion 9 in the third embodiment can be applied to the light emitting device of the second embodiment.
  • the light emitting device according to the present invention has been specifically described with reference to the embodiments for carrying out the invention. However, the gist of the present invention is not limited to these descriptions, and is widely interpreted based on the description of the claims. It must be. Needless to say, various changes and modifications based on these descriptions are also included in the spirit of the present invention.

Abstract

Disclosed is a light-emitting device (101) comprising: a substrate (1); a light-emitting section (20) composed of a plurality of light-emitting elements (2) disposed on a mounting area on the substrate; a positive electrode (3) and a negative electrode (4) both provided with a pad section (3a) and a wiring section (3b) , which apply voltage to the light-emitting elements through the wiring section; and a light-reflecting resin (6) formed on the substrate so as to cover at least the wiring section. A relay wiring section (8) is formed around the perimeter of the mounting area, covering the light-reflecting resin.

Description

発光装置Light emitting device
　本発明は、ＬＥＤ電球等の照明器具、表示装置、ディスプレイ、液晶ディスプレイのバックライト光源等に利用可能な発光装置に関する。 The present invention relates to a light emitting device that can be used as a lighting source such as an LED bulb, a display device, a display, a backlight light source of a liquid crystal display, and the like.
　近年、白熱電球等の照明光源よりも発熱量、消費電力が少なく、長寿命な発光ダイオード（ＬＥＤ：Light Emitting Diode）を発光素子として利用した発光装置が種々開発されている。 In recent years, various light emitting devices using light emitting diodes (LEDs) that emit less heat and consume less power than illumination light sources such as incandescent bulbs and that have a long life have been developed as light emitting elements.
　例えば、特許文献１では、複数の発光ダイオード素子が実装された基台と、基台上面に配設されたプリント基板と、プリント基板上において、複数の発光ダイオード素子が実装された領域を挟むように形成されたカソードおよびアノードからなる端子電極と、を備える発光ダイオード光源ユニットが提案されている。 For example, in Patent Document 1, a base on which a plurality of light emitting diode elements are mounted, a printed circuit board disposed on the upper surface of the base, and a region on which the plurality of light emitting diode elements are mounted are sandwiched between the printed circuit boards. There has been proposed a light-emitting diode light source unit including a cathode and an anode terminal electrode.
　また、特許文献２では、上部にガラス層が形成された基板と、ガラス層上に設置された複数のＬＥＤチップと、ガラス層上において、複数のＬＥＤチップを挟むように形成された正電極外部接続端子および負電極外部接続端子と、を備える発光装置が提案されている。 Moreover, in patent document 2, the board | substrate with which the glass layer was formed in the upper part, the some LED chip installed on the glass layer, and the positive electrode exterior formed so that several LED chip might be pinched | interposed on a glass layer A light-emitting device including a connection terminal and a negative electrode external connection terminal has been proposed.
特開２００６－２９５０８５号公報（図１参照）JP 2006-295085 A (see FIG. 1) 特開２０１０－０３４４８７号公報（図７（ｂ）参照）Japanese Patent Laying-Open No. 2010-034487 (see FIG. 7B)
　従来、発光装置の輝度向上のために、基板上に数十個の発光素子が配置された発光装置の開発が盛んに行われている。そして、このような複数の発光素子を実装した発光装置においては、発光装置に接続される電源の容量および出力電圧によって、発光装置を駆動できなかったり、電圧を昇圧する必要があったり、発光効率が悪くなったりする問題が発生する。例えば順方向電圧Ｖｆが３Ｖの発光素子が１０個直列に接続された発光装置では、出力電圧が３０Ｖの電源を用いることが好ましく、出力電圧が２０Ｖの電源を用いると、電圧を昇圧させて駆動させる必要があり、また出力電圧が６０Ｖの電源を用いると、発光効率が悪くなってしまう。つまりは発光装置に接続される電源の容量に適した発光装置であることが望まれており、複数の発光素子が配置された発光装置においては、発光素子をいくつ直列接続するかに依存することになる。しかしながら、輝度向上が求められるなか、発光装置の大きさにも限界があり、一定の大きさの発光装置に設ける直列接続される発光素子の数にも限界があった。 Conventionally, in order to improve the luminance of a light emitting device, a light emitting device in which several tens of light emitting elements are arranged on a substrate has been actively developed. In a light-emitting device mounted with such a plurality of light-emitting elements, the light-emitting device cannot be driven due to the capacity and output voltage of the power source connected to the light-emitting device, the voltage needs to be boosted, The problem that becomes worse occurs. For example, in a light-emitting device in which ten light-emitting elements with a forward voltage Vf of 3 V are connected in series, a power supply with an output voltage of 30 V is preferably used, and when a power supply with an output voltage of 20 V is used, the voltage is boosted and driven. If a power supply with an output voltage of 60V is used, the light emission efficiency is deteriorated. In other words, a light emitting device suitable for the capacity of a power source connected to the light emitting device is desired, and in a light emitting device in which a plurality of light emitting elements are arranged, it depends on how many light emitting elements are connected in series. become. However, there is a limit to the size of the light-emitting device, and the number of light-emitting elements connected in series provided in a light-emitting device of a certain size is also limited, as brightness improvement is required.
　本発明は、前記問題点に鑑みてなされたものであり、種々の容量および出力電圧の電源に適した発光装置を提供すること、また直列接続の数を増加させることができ、光の取り出し効率が向上した発光装置を提供することを課題とする。 The present invention has been made in view of the above-described problems, and provides a light-emitting device suitable for a power source having various capacities and output voltages, can increase the number of series connections, and can extract light efficiently. It is an object of the present invention to provide a light emitting device improved in the above.
　前記課題を解決するために本発明に係る発光装置は、基板と、前記基板上の実装領域に配置された複数の発光素子からなる発光部と、それぞれがパッド部と配線部とを有し、当該配線部を介して前記発光部に電圧を印加する正極および負極と、少なくとも前記配線部を覆うように前記基板上に形成された光反射樹脂と、を備える発光装置であって、前記実装領域の周囲に沿って中継配線部が形成され、前記中継配線部が前記光反射樹脂に覆われている構成とする。 In order to solve the above problems, a light-emitting device according to the present invention includes a substrate, a light-emitting unit including a plurality of light-emitting elements arranged in a mounting region on the substrate, and a pad unit and a wiring unit, A light emitting device comprising: a positive electrode and a negative electrode that apply a voltage to the light emitting unit through the wiring unit; and a light reflecting resin formed on the substrate so as to cover at least the wiring unit, wherein the mounting region A relay wiring portion is formed along the periphery of the, and the relay wiring portion is covered with the light reflecting resin.
　このような構成によれば、実装領域の限られた面積内において、中継配線部を介して直列接続される発光素子の数を増加させることができるとともに、出射光のロスを軽減することができ、光の取り出し効率が向上した発光装置を得ることができる。 According to such a configuration, the number of light emitting elements connected in series via the relay wiring portion can be increased and the loss of emitted light can be reduced within a limited area of the mounting region. A light emitting device with improved light extraction efficiency can be obtained.
　また、前記複数の発光素子は、一側に形成されたｐ電極と、他側に形成されたｎ電極と、をそれぞれ備え、前記複数の発光素子は、前記中継配線部に対して、前記ｐ電極と接続される発光素子と、前記ｎ電極と接続される発光素子とを含む構成とすることが好ましい。 The plurality of light-emitting elements each include a p-electrode formed on one side and an n-electrode formed on the other side, and the plurality of light-emitting elements are connected to the relay wiring portion with respect to the p-electrode. It is preferable to include a light emitting element connected to the electrode and a light emitting element connected to the n electrode.
　このような構成によれば、正極から直列接続された発光素子と、負極に向けて直列接続された発光素子とを中継配線部を介して接続することができ、発光装置として直列接続される発光素子の数を増加させることができる。さらには、実装領域の限られた面積内において、複数の発光素子を密に配置することができ、一定の輝度に対して消費電力が向上した発光装置を、または一定の消費電力に対して発光効率が向上した発光装置を得ることができる。 According to such a configuration, the light emitting elements connected in series from the positive electrode and the light emitting elements connected in series toward the negative electrode can be connected via the relay wiring portion, and the light emitting devices connected in series as the light emitting device. The number of elements can be increased. Furthermore, within a limited area of the mounting area, a plurality of light emitting elements can be densely arranged, and a light emitting device with improved power consumption with respect to constant luminance or light emission with respect to constant power consumption. A light-emitting device with improved efficiency can be obtained.
　また、前記正極の配線部と前記中継配線部との間において、前記ｐ電極が前記実装領域に対して一方向を向くように配列され、前記負極の配線部と前記中継配線部との間において、前記ｐ電極が前記実装領域に対して他方向を向くように配列された構成とすることが好ましい。 The p-electrode is arranged so as to face one direction with respect to the mounting region between the positive wiring portion and the relay wiring portion, and between the negative wiring portion and the relay wiring portion. It is preferable that the p electrodes are arranged so as to face the other direction with respect to the mounting region.
　このような構成によれば、実装領域の周囲に沿って中継配線部を形成し、かつ、当該中継配線部を境に向きが反転するように発光素子を配置することで、発光素子同士を接続する配線が複雑になることなく、実装領域の限られた面積内において、中継配線部を介して直列接続される発光素子の数を増加させることができる。さらには、実装領域の限られた面積内において、複数の発光素子を密に配置することができ、一定の輝度に対して消費電力が向上した発光装置を、または一定の消費電力に対して発光効率が向上した発光装置を得ることができる。 According to such a configuration, the relay wiring portion is formed along the periphery of the mounting area, and the light emitting elements are arranged so that the direction is reversed with the relay wiring portion as a boundary, thereby connecting the light emitting elements to each other. The number of light emitting elements connected in series via the relay wiring portion can be increased within a limited area of the mounting region without complicating the wiring to be performed. Furthermore, within a limited area of the mounting area, a plurality of light emitting elements can be densely arranged, and a light emitting device with improved power consumption with respect to constant luminance or light emission with respect to constant power consumption. A light-emitting device with improved efficiency can be obtained.
　また、前記中継配線部を複数有し、前記複数の発光素子の一部が２つの前記中継配線部に挟まれてなる構成とすることが好ましい。
　このような構成によれば、発光素子同士を接続する配線が中継配線部を介して複雑になることなく、実装領域の限られた面積内において、さらに中継配線部を介して発光素子同士の直列接続の数を増加させることができる。さらには、実装領域の限られた面積内において、複数の発光素子を密に配置することができ、一定の輝度に対して消費電力が向上した発光装置を、または一定の消費電力に対して発光効率が向上した発光装置を得ることができる。 Further, it is preferable that a plurality of the relay wiring portions are provided and a part of the plurality of light emitting elements is sandwiched between the two relay wiring portions.
According to such a configuration, the wiring for connecting the light emitting elements does not become complicated via the relay wiring portion, and the light emitting elements are connected in series via the relay wiring portion within a limited area of the mounting area. The number of connections can be increased. Furthermore, within a limited area of the mounting area, a plurality of light emitting elements can be densely arranged, and a light emitting device with improved power consumption with respect to constant luminance or light emission with respect to constant power consumption. A light-emitting device with improved efficiency can be obtained.
　また、本発明に係る発光装置は、前記複数の発光素子が、ワイヤによって互いに直列および並列に電気的に接続されている構成とすることが好ましい。 The light-emitting device according to the present invention preferably has a configuration in which the plurality of light-emitting elements are electrically connected in series and in parallel with each other by wires.
　このような構成によれば、複数の発光素子同士を直列のみならず並列に接続することで、仮に複数の発光素子ごとの順方向降下電圧にばらつきがある場合であっても、並列接続された発光素子の順方向降下電圧を等しくすることができる。これにより、発光素子間における順方向降下電圧のばらつきによる発光ムラを抑制することができる。 According to such a configuration, by connecting a plurality of light emitting elements in parallel as well as in series, even if there is a variation in the forward voltage drop for each of the plurality of light emitting elements, they are connected in parallel. The forward voltage drop of the light emitting elements can be made equal. Thereby, the light emission nonuniformity by the dispersion | variation in the forward voltage drop between light emitting elements can be suppressed.
　また、本発明に係る発光装置は、前記反射性樹脂が、前記実装領域の周囲を囲うように形成された構成とすることが好ましい。 Further, the light emitting device according to the present invention preferably has a configuration in which the reflective resin is formed so as to surround the mounting area.
　このような構成によれば、実装領域の周囲を囲うように光反射樹脂を形成することで、基板の実装領域の周囲に向う光も光反射樹脂によって反射することができる。従って、出射光のロスを軽減することができ、発光装置の光の取り出し効率を向上させることができる。 According to such a configuration, by forming the light reflecting resin so as to surround the periphery of the mounting region, the light toward the periphery of the mounting region of the substrate can also be reflected by the light reflecting resin. Accordingly, loss of emitted light can be reduced, and light extraction efficiency of the light emitting device can be improved.
　また、本発明に係る発光装置は、前記実装領域上に金属膜が形成され、当該金属膜を介して前記複数の発光素子が配置された構成とすることが好ましい。 Further, the light emitting device according to the present invention preferably has a configuration in which a metal film is formed on the mounting region, and the plurality of light emitting elements are arranged via the metal film.
　このような構成によれば、実装領域上に金属膜を形成してその上に複数の発光素子を配置することで、基板の実装領域側に向う光も金属膜によって反射することができる。従って、出射光のロスを軽減することができ、発光装置の光の取り出し効率を向上させることができる。 According to such a configuration, by forming a metal film on the mounting area and arranging a plurality of light emitting elements thereon, light directed toward the mounting area of the substrate can also be reflected by the metal film. Accordingly, loss of emitted light can be reduced, and light extraction efficiency of the light emitting device can be improved.
　また、本発明に係る発光装置は、前記光反射樹脂が、前記実装領域の周縁の一部を覆うように形成された構成とすることが好ましい。 Further, the light emitting device according to the present invention preferably has a configuration in which the light reflecting resin is formed so as to cover a part of the periphery of the mounting region.
　このような構成によれば、実装領域の周縁の一部を覆うように光反射樹脂を形成することで、配線部と実装領域上の金属膜との間に基板が露出した領域が形成されることがなくなる。従って、発光素子から出射された光を、光反射樹脂が形成された内部の領域において全て反射させることができるため、出射光のロスを最大限軽減することができ、発光装置の光の取り出し効率をより向上させることができる。 According to such a configuration, by forming the light reflecting resin so as to cover a part of the periphery of the mounting region, a region where the substrate is exposed is formed between the wiring portion and the metal film on the mounting region. Nothing will happen. Therefore, since all the light emitted from the light emitting element can be reflected in the inner region where the light reflecting resin is formed, the loss of the emitted light can be reduced to the maximum, and the light extraction efficiency of the light emitting device can be reduced. Can be further improved.
　本発明に係る発光装置によれば、実装領域の限られた面積内において、中継配線部を介して直列接続される発光素子の数を増加させることができるとともに、出射光のロスを軽減することができ、光の取り出し効率が向上した発光装置を得ることができる。 According to the light emitting device of the present invention, the number of light emitting elements connected in series via the relay wiring portion can be increased and the loss of emitted light can be reduced within a limited area of the mounting area. And a light emitting device with improved light extraction efficiency can be obtained.
本発明の実施形態に係る発光装置の全体構成を示す斜視図である。It is a perspective view which shows the whole structure of the light-emitting device which concerns on embodiment of this invention. 本発明の第１実施形態に係る発光装置の構成を示す正面図である。It is a front view which shows the structure of the light-emitting device which concerns on 1st Embodiment of this invention. 第１実施形態に係る発光素子の構成を示す拡大正面図である。It is an enlarged front view which shows the structure of the light emitting element which concerns on 1st Embodiment. 第１実施形態に係る発光装置の構成を示す側面図である。It is a side view which shows the structure of the light-emitting device which concerns on 1st Embodiment. 本発明の第１実施形態に係る他の発光装置の構成を示す正面図である。It is a front view which shows the structure of the other light-emitting device which concerns on 1st Embodiment of this invention. 本発明の第２実施形態に係る発光装置の構成を示す正面図である。It is a front view which shows the structure of the light-emitting device which concerns on 2nd Embodiment of this invention. 本発明の第３実施形態に係る発光装置の構成を示す正面図である。It is a front view which shows the structure of the light-emitting device which concerns on 3rd Embodiment of this invention. 本発明の第４実施形態に係る発光装置の構成を示す正面図である。It is a front view which shows the structure of the light-emitting device which concerns on 4th Embodiment of this invention.
　以下、本発明の実施形態に係る発光装置について、図面を参照しながら説明する。なお、各図面が示す部材のサイズや位置関係等は、説明を明確にするため誇張していることがある。さらに以下の説明において、同一の名称、符号については、原則として同一もしくは同質の部材を示しており、詳細説明を適宜省略する。また、以下の説明で参照する図２、図５～図７において、発光素子のｐ電極およびｎ電極（図３参照）は、各発光素子の向きを示すために実装領域上の４箇所または６箇所だけ図示し、実装領域上のその他の箇所では図示を省略している。 Hereinafter, a light emitting device according to an embodiment of the present invention will be described with reference to the drawings. Note that the size, positional relationship, and the like of the members shown in each drawing may be exaggerated for clarity of explanation. Further, in the following description, the same name and reference sign indicate the same or the same members in principle, and the detailed description will be omitted as appropriate. 2 and 5 to 7 referred to in the following description, the p-electrode and the n-electrode (see FIG. 3) of the light-emitting element are arranged at four locations on the mounting area or 6 to indicate the direction of each light-emitting element. Only the portions are illustrated, and illustration is omitted in other portions on the mounting area.
［第１実施形態］
　第１実施形態に係る発光装置１０１について、図１～図５を参照しながら詳細に説明する。以下の説明では、まず発光装置１０１の全体構成について説明した後に、各構成について説明する。なお、説明の便宜上、図２、図５における光反射樹脂６は、外形のみを線で示し、透過させた状態で図示している。他の実施形態で説明する図６～８についても同様に透過させた状態で図示している。 [First Embodiment]
The light emitting device 101 according to the first embodiment will be described in detail with reference to FIGS. In the following description, the overall configuration of the light emitting device 101 is described first, and then each configuration is described. For convenience of explanation, the light reflecting resin 6 in FIGS. 2 and 5 is shown in a state in which only the outer shape is shown by lines and transmitted. 6 to 8 described in other embodiments are also shown in a transparent state.
＜全体構成＞
　発光装置１０１は、ＬＥＤ電球等の照明器具、表示装置、ディスプレイ、液晶ディスプレイのバックライト光源等に利用される装置である。発光装置１０１は、図１、図２および図４に示すように、基板１と、基板１の実装領域１ａに複数配置された発光素子２と、基板１上に形成された正極３および負極４と、正極３および負極４とは別に形成された中継配線部８と、発光素子２等の電子部品と、正極３や負極４および中継配線部８と発光素子２を、さらに発光素子２同士を接続するワイヤＷと、基板１上に形成された光反射樹脂６と、を主な構成として備えている。また、発光装置１０１は、ここでは光反射樹脂６を周縁としてその内側に封止部材７が充填された構成としている。 <Overall configuration>
The light emitting device 101 is a device used for a lighting device such as an LED bulb, a display device, a display, a backlight light source of a liquid crystal display, or the like. As shown in FIGS. 1, 2, and 4, the light emitting device 101 includes a substrate 1, a plurality of light emitting elements 2 arranged in a mounting region 1 a of the substrate 1, and a positive electrode 3 and a negative electrode 4 formed on the substrate 1. And the relay wiring portion 8 formed separately from the positive electrode 3 and the negative electrode 4, the electronic components such as the light emitting element 2, the positive electrode 3, the negative electrode 4, the relay wiring portion 8 and the light emitting element 2, and the light emitting elements 2 to each other. A wire W to be connected and a light reflecting resin 6 formed on the substrate 1 are provided as main components. Here, the light emitting device 101 has a configuration in which the light reflecting resin 6 is used as a peripheral edge and the sealing member 7 is filled therein.
＜基板＞
　基板１は、発光素子２等の電子部品を配置するためのものである。基板１は、図１および図２に示すように、矩形平板状に形成されている。また、基板１上には、図２に示すように複数の発光素子２を配置するための実装領域１ａが区画されている。なお、基板１のサイズは特に限定されず、発光素子２の数等、目的および用途に応じて適宜選択することができる。 <Board>
The substrate 1 is for arranging electronic components such as the light emitting element 2. As shown in FIGS. 1 and 2, the substrate 1 is formed in a rectangular flat plate shape. On the substrate 1, a mounting region 1 a for arranging a plurality of light emitting elements 2 is defined as shown in FIG. 2. The size of the substrate 1 is not particularly limited, and can be appropriately selected according to the purpose and application such as the number of the light emitting elements 2.
　基板１の材料としては、絶縁性材料を用いることが好ましく、かつ、発光素子２から放出される光や外光等が透過しにくい材料を用いることが好ましい。また、ある程度の強度を有する材料を用いることが好ましい。具体的には、セラミックス（Ａｌ２Ｏ３、ＡｌＮ等）、フェノール樹脂、エポキシ樹脂、ポリイミド樹脂、ＢＴレジン（bismaleimide triazine resin）、ポリフタルアミド（ＰＰＡ）等の樹脂が挙げられる。 As a material for the substrate 1, an insulating material is preferably used, and a material that hardly transmits light emitted from the light-emitting element 2, external light, or the like is preferably used. Moreover, it is preferable to use a material having a certain degree of strength. Specific examples include ceramics (Al 2 O 3 , AlN, etc.), phenol resins, epoxy resins, polyimide resins, BT resins (bismaleimide triazine resin), polyphthalamide (PPA), and the like.
＜実装領域＞
　実装領域１ａは、複数の発光素子２を配置するための領域である。実装領域１ａは、図２に示すように、基板１の中央の領域に区画されている。実装領域１ａは、互いに対向する辺を有する所定形状で形成されており、より具体的には、図２に示すように、角部を丸めた略矩形状に形成されている。なお、実装領域１ａのサイズは特に限定されず、発光素子２の数や配列間隔等、目的および用途に応じて適宜選択することができる。 <Mounting area>
The mounting area 1 a is an area for arranging a plurality of light emitting elements 2. As shown in FIG. 2, the mounting area 1 a is partitioned into a central area of the substrate 1. The mounting region 1a is formed in a predetermined shape having sides facing each other, and more specifically, is formed in a substantially rectangular shape with rounded corners as shown in FIG. The size of the mounting region 1a is not particularly limited, and can be appropriately selected according to the purpose and application such as the number of light emitting elements 2 and the arrangement interval.
　実装領域１ａの周囲には、図２を正面視した場合において、実装領域１ａの左側の辺に沿って配線部３ｂの一部および配線部４ｂの一部が形成され、実装領域１ａの下側の辺に沿って配線部４ｂの一部が形成され、実装領域１ａの右側の辺に沿って中継配線部８が形成されている。なお、ここでの実装領域１ａの周囲とは、図２に示すように、実装領域１ａの周縁と所定の間隔を置いた周囲のことを意味している。 A part of the wiring part 3b and a part of the wiring part 4b are formed around the mounting area 1a along the left side of the mounting area 1a in the front view of FIG. A part of the wiring part 4b is formed along the side of the wiring, and the relay wiring part 8 is formed along the right side of the mounting region 1a. Here, the periphery of the mounting region 1a means a periphery at a predetermined interval from the periphery of the mounting region 1a, as shown in FIG.
　実装領域１ａは、複数の発光素子２を配置するために基板１上に区画した領域、すなわち基板１と同じ材料で構成された領域としてもよいが、例えば、実装領域１ａ上に光を反射する金属膜を形成し、当該金属膜を介して複数の発光素子２を配置することが好ましい。このように実装領域１ａ上に金属膜を形成してその上に複数の発光素子２を配置することで、発光素子２から出射された光のうち、基板１の実装領域１ａ側に向う光も金属膜によって反射することができる。従って、出射光のロスを軽減することができ、発光装置１０１の光の取り出し効率を向上させることができる。 The mounting region 1a may be a region partitioned on the substrate 1 for arranging the plurality of light emitting elements 2, that is, a region made of the same material as the substrate 1, but for example, reflects light on the mounting region 1a. It is preferable to form a metal film and arrange a plurality of light emitting elements 2 through the metal film. Thus, by forming the metal film on the mounting region 1a and arranging the plurality of light emitting elements 2 thereon, the light emitted from the light emitting element 2 is also directed toward the mounting region 1a of the substrate 1. It can be reflected by the metal film. Accordingly, loss of emitted light can be reduced, and light extraction efficiency of the light emitting device 101 can be improved.
　実装領域１ａ上に形成する金属膜は、電解めっきまたは無電解めっきで形成することが好ましい。金属膜の材料としては、めっきができるものであれば特に限定されないが、例えば、Ａｇ（銀）またはＡｕ（金）を用いることが好ましく、特にＡｇ（銀）を用いることが好ましい。Ａｕは光を吸収しやすい特性を備えているが、例えばＡｕめっきの表面にＴｉＯ２膜をさらに形成することで、光反射率を高めることができる。また、ＡｇはＡｕよりも光反射率が高いため、Ａｕ単独でめっきを行うよりも、発光装置１０１の光の取り出し効率を向上させることができる。なお、実装領域１ａ上に形成する金属膜の厚さは特に限定されず、目的および用途に応じて適宜選択することができる。 The metal film formed on the mounting region 1a is preferably formed by electrolytic plating or electroless plating. The material of the metal film is not particularly limited as long as it can be plated. For example, Ag (silver) or Au (gold) is preferably used, and Ag (silver) is particularly preferably used. Au has a characteristic of easily absorbing light. For example, the light reflectance can be increased by further forming a TiO 2 film on the surface of Au plating. In addition, since Ag has a higher light reflectance than Au, the light extraction efficiency of the light-emitting device 101 can be improved compared to plating with Au alone. The thickness of the metal film formed on the mounting region 1a is not particularly limited and can be appropriately selected according to the purpose and application.
　なお本実施形態では、図１および図４に示すように、実装領域１ａの上部に後記する封止部材７が充填され、実装領域１ａ上の複数の発光素子２および、当該複数の発光素子２に接続されたワイヤＷが塵芥、水分、外力等から保護される構成となっている。 In the present embodiment, as shown in FIGS. 1 and 4, a sealing member 7 to be described later is filled in the upper portion of the mounting region 1 a, and the plurality of light emitting elements 2 on the mounting region 1 a and the plurality of light emitting elements 2 are included. The wire W connected to is protected from dust, moisture, external force and the like.
＜発光素子＞
　発光素子２は、電圧を印加することで自発光する半導体素子である。発光素子２は、図２に示すように、基板１の実装領域１ａに複数配置され、当該複数の発光素子２が一体となって発光装置１０１の発光部２０を構成している。なお、発光素子２は、図示しない接合部材によって実装領域１ａに接合されており、その接合方法としては、例えば接合部材として樹脂や半田ペーストを用いる接合方法を用いることができる。なお、図示された発光部２０は単に発光素子２を載置させる領域を示すものであり、発光部における発光とは、発光素子２から出される光であることはいうまでもない。 <Light emitting element>
The light emitting element 2 is a semiconductor element that emits light by applying a voltage. As shown in FIG. 2, a plurality of light emitting elements 2 are arranged in the mounting region 1 a of the substrate 1, and the plurality of light emitting elements 2 together constitute a light emitting unit 20 of the light emitting device 101. The light emitting element 2 is bonded to the mounting region 1a by a bonding member (not shown). As a bonding method, for example, a bonding method using resin or solder paste as the bonding member can be used. Note that the illustrated light emitting unit 20 simply indicates a region where the light emitting element 2 is placed, and it is needless to say that light emission in the light emitting unit is light emitted from the light emitting element 2.
　発光素子２のそれぞれは、図３に示すように、矩形状に形成されている。また、発光素子２は、図３に示すように、その上面の一側にｐ電極２Ａが設けられ、発光素子２の他側にｎ電極２Ｂが設けられたフェースアップ（ＦＵ）素子である。本実施の形態では、図４に示すように、発光素子２を載置する金属膜と正極３および負極４を構成する金属部材とを離間して配置するため、図３に示すようなｐ電極とｎ電極が同一面側に形成された発光素子を用い、電極形成面と反対側の発光素子２の面が金属膜となる実装領域１ａに実装されることが好ましい。ｐ電極２Ａおよびｎ電極２Ｂは、図３に示すように、電極端子であるｐパッド電極２Ａａおよびｎパッド電極２Ｂａと、発光素子２に投入された電流を全体に拡散させるための補助電極である延伸導電部２Ａｂ，２Ｂｂと、をそれぞれ備えている。なお、発光素子は少なくともｐパッド電極２Ａａとｎパッド電極２Ｂａが同一面側にあればよく、延伸導電部２Ａｂ、２Ｂｂを設けなくてもよい。また、図示は省略したが、発光素子２は、側面視すると、ｎ型半導体層およびｐ型半導体層からなる複数の半導体層が積層された構造を有している。 Each of the light emitting elements 2 is formed in a rectangular shape as shown in FIG. As shown in FIG. 3, the light emitting element 2 is a face-up (FU) element in which a p electrode 2 </ b> A is provided on one side of the upper surface and an n electrode 2 </ b> B is provided on the other side of the light emitting element 2. In the present embodiment, as shown in FIG. 4, the metal film on which the light emitting element 2 is placed and the metal members constituting the positive electrode 3 and the negative electrode 4 are arranged apart from each other. And the n-electrode are preferably mounted on the mounting region 1a where the surface of the light-emitting element 2 opposite to the electrode-forming surface is a metal film. As shown in FIG. 3, the p electrode 2A and the n electrode 2B are auxiliary electrodes for diffusing the current supplied to the light emitting element 2 and the p pad electrode 2Aa and the n pad electrode 2Ba which are electrode terminals. Each of the extending conductive portions 2Ab and 2Bb is provided. In the light emitting element, at least the p pad electrode 2Aa and the n pad electrode 2Ba need only be on the same surface side, and the extended conductive portions 2Ab and 2Bb need not be provided. Although not shown, the light emitting element 2 has a structure in which a plurality of semiconductor layers including an n-type semiconductor layer and a p-type semiconductor layer are stacked in a side view.
　発光素子２としては、具体的には発光ダイオードを用いるのが好ましく、用途に応じて任意の波長のものを選択することができる。例えば、青色（波長４３０ｎｍ～４９０ｎｍの光）、緑色（波長４９０ｎｍ～５７０ｎｍの光）の発光素子２としては、ＺｎＳｅ、窒化物系半導体（ＩｎＸＡｌＹＧａ１－Ｘ－ＹＮ、０≦Ｘ、０≦Ｙ、Ｘ＋Ｙ≦１）、ＧａＰ等を用いることができる。また、赤色（波長６２０ｎｍ～７５０ｎｍの光）の発光素子２としては、ＧａＡｌＡｓ、ＡｌＩｎＧａＰ等を用いることができる。 Specifically, a light-emitting diode is preferably used as the light-emitting element 2, and a light-emitting element having an arbitrary wavelength can be selected according to the application. For example, as the light emitting element 2 of blue (light having a wavelength of 430 nm to 490 nm) and green (light having a wavelength of 490 nm to 570 nm), ZnSe, a nitride-based semiconductor (In X Al Y Ga 1-XY N, 0 ≦ X , 0 ≦ Y, X + Y ≦ 1), GaP, or the like can be used. As the red light emitting element 2 (light having a wavelength of 620 nm to 750 nm), GaAlAs, AlInGaP, or the like can be used.
　また、後記するように、封止部材７（図１参照）に蛍光物質を導入する場合は、その蛍光物質を効率良く励起できる短波長の発光が可能な窒化物半導体（ＩｎＸＡｌＹＧａ１－Ｘ－ＹＮ、０≦Ｘ、０≦Ｙ、Ｘ＋Ｙ≦１）を用いることが好ましい。ただし、発光素子２の成分組成や発光色、サイズ等は上記に限定されず、目的に応じて適宜選択することができる。また、発光素子２は、可視光領域の光だけではなく、紫外線や赤外線を出力する素子で構成することもできる。また、高出力化のためには、発光素子２の個数は、例えば１０個以上、２０～１５０個の範囲内とすることが好ましい。 As will be described later, when a fluorescent material is introduced into the sealing member 7 (see FIG. 1), a nitride semiconductor (In X Al Y Ga 1 capable of emitting light of a short wavelength that can efficiently excite the fluorescent material). -XYN, 0≤X, 0≤Y , X + Y≤1) are preferably used. However, the component composition, emission color, size, and the like of the light emitting element 2 are not limited to the above, and can be appropriately selected according to the purpose. Moreover, the light emitting element 2 can also be comprised with the element which outputs not only the light of a visible light range but an ultraviolet-ray and infrared rays. In order to increase the output, the number of light emitting elements 2 is preferably in the range of, for example, 10 or more and 20 to 150.
　発光素子２は、図２に示すように、実装領域１ａ上において、縦方向および横方向にそれぞれ等間隔で配列されており、ここでは、縦８個×横５個の合計４０個配置されている。また、発光素子２は、図２に示すように、実装領域１ａに対して横方向に隣り合う発光素子２同士が導電性のワイヤＷによって電気的に接続され、直列接続されている。なお、ここでの直列接続とは、図２に示すように、隣り合う発光素子２におけるｐ電極２Ａとｎ電極２ＢとがワイヤＷによって電気的に接続された状態を意味している。 As shown in FIG. 2, the light emitting elements 2 are arranged at equal intervals in the vertical direction and the horizontal direction on the mounting area 1a. Here, a total of 40 light emitting elements 8 × 5 horizontal elements are arranged. Yes. As shown in FIG. 2, the light emitting elements 2 are connected in series by electrically connecting the light emitting elements 2 adjacent to each other in the horizontal direction with respect to the mounting region 1a by a conductive wire W. Here, the series connection means a state in which the p-electrode 2A and the n-electrode 2B in the adjacent light-emitting elements 2 are electrically connected by the wire W as shown in FIG.
　さらに発光素子２は、図２に示すように、実装領域１ａに対して横方向に隣り合う発光素子２同士が導電性のワイヤＷによって電気的に接続され、直列接続のみならず並列接続されていることが好ましい。なお、ここでの並列接続とは、図４に示すように、隣り合う発光素子２におけるｐ電極２Ａ同士またはｎ電極２Ｂ同士がワイヤＷによって電気的に接続された状態を意味している。 Further, as shown in FIG. 2, the light emitting elements 2 are electrically connected by the conductive wires W between the light emitting elements 2 adjacent in the lateral direction with respect to the mounting region 1 a, and are connected not only in series but also in parallel. Preferably it is. In addition, the parallel connection here means the state in which the p electrodes 2A or the n electrodes 2B in the adjacent light emitting elements 2 are electrically connected by a wire W as shown in FIG.
　このように、複数の発光素子２同士を直列のみならず並列に接続することで、仮に複数の発光素子２ごとの順方向降下電圧（以下、Ｖｆという）にばらつきがある場合であっても、そのＶｆのばらつきを解消することができる。なお、Ｖｆとは、発光ダイオードに対して順方向に電流を流すために必要な電圧、すなわち発光ダイオードが光を照射するために必要な電圧のことをいう。 As described above, by connecting a plurality of light emitting elements 2 not only in series but also in parallel, even if there is a variation in forward voltage drop (hereinafter referred to as Vf) for each of the plurality of light emitting elements 2, The variation in Vf can be eliminated. Note that Vf means a voltage necessary for a current to flow in the forward direction with respect to the light emitting diode, that is, a voltage necessary for the light emitting diode to emit light.
　ここで、複数の発光素子２ごとのＶｆのばらつきがあると、Ｖｆの低い発光素子２に電流が流れやすくなり、発光素子２間に出力の違いが生じて発光ムラが発生しやすい。そこで、前記したように、複数の発光素子２同士を並列接続することにより、並列接続された発光素子２間のＶｆのばらつきによる各発光素子の出力差を軽減することができ、発光ムラを抑制することができる。 Here, if there is a variation in Vf for each of the plurality of light emitting elements 2, current easily flows through the light emitting elements 2 having a low Vf, and an output difference occurs between the light emitting elements 2, so that uneven light emission is likely to occur. Therefore, as described above, by connecting a plurality of light emitting elements 2 in parallel, an output difference of each light emitting element due to a variation in Vf between the light emitting elements 2 connected in parallel can be reduced, and uneven light emission is suppressed. can do.
　なお、前記したように複数の発光素子２を並列接続する場合は、図２に示すように、複数の発光素子２のうち、配線部３ｂ，４ｂおよび中継配線部８と直接接続される発光素子２同士は、並列接続を行わないことが好ましい。すなわち、発光装置１０１においては、配線部３ｂと直接接続される実装領域１ａ上の１行１列目、２行１列目の発光素子２のｐ電極２Ａは、並列接続されていない。また、発光装置１０１においては、配線部４ｂと直接接続される実装領域１ａ上の７行１列目、８行１列目の発光素子２のｎ電極２Ｂは、並列接続されていない。さらに、発光装置１０１においては、中継配線部８と直接接続される１行５列目、２行５列目、３行５列目、４行５列目のｎ電極２Ｂは、並列接続されていない。そして、発光装置１０１においては、中継配線部８と直接接続される５行５列目、６行５列目、７行５列目、８行５列目のｐ電極２Ａは、並列接続されていない。これにより発光装置１０１においてワイヤＷによってかかる負荷を軽減することができる。 In addition, when connecting the some light emitting element 2 in parallel as mentioned above, as shown in FIG. 2, among the some light emitting elements 2, the light emitting element directly connected with wiring part 3b, 4b and the relay wiring part 8 is shown. The two are preferably not connected in parallel. That is, in the light emitting device 101, the p-electrode 2A of the light emitting element 2 in the first row, first column, and second row, first column on the mounting region 1a directly connected to the wiring portion 3b is not connected in parallel. Further, in the light emitting device 101, the n electrodes 2B of the light emitting elements 2 in the seventh row, first column and the eighth row, first column on the mounting region 1a directly connected to the wiring portion 4b are not connected in parallel. Furthermore, in the light emitting device 101, the n-electrodes 2B in the first row, fifth column, second row, fifth column, third row, fifth column, and fourth row, fifth column that are directly connected to the relay wiring portion 8 are connected in parallel. Absent. In the light emitting device 101, the p-electrodes 2A in the fifth row, fifth column, the sixth row, fifth column, the seventh row, fifth column, and the eighth row, fifth column that are directly connected to the relay wiring unit 8 are connected in parallel. Absent. Thereby, the load applied by the wire W in the light emitting device 101 can be reduced.
＜正極および負極＞
　正極３および負極４は、基板１上の複数の発光素子２等の電子部品と、図示しない外部電源とを電気的に接続し、これらの電子部品に対して外部電源からの電圧を印加するためのものである。すなわち、正極３および負極４は、外部から通電させるための電極、またはその一部としての役割を担うものである。 <Positive electrode and negative electrode>
The positive electrode 3 and the negative electrode 4 are for electrically connecting electronic components such as the plurality of light emitting elements 2 on the substrate 1 and an external power source (not shown), and applying a voltage from the external power source to these electronic components. belongs to. That is, the positive electrode 3 and the negative electrode 4 play a role as electrodes for energizing from the outside or a part thereof.
　正極３および負極４は、図２に示すように、基板１上の金属膜で構成されている。正極３および負極４は、図２に示すように略矩形状のパッド部（給電部）３ａ，４ａと、線状の配線部３ｂ，４ｂと、を有しており、パッド部３ａ，４ａに印加された電圧が配線部３ｂ，４ｂを介して複数の発光素子２からなる発光部２０へと印加されるように構成されている。なお、負極４の配線部４ｂには、図２に示すように、カソードであることを示すカソードマークＣＭが形成されている。 The positive electrode 3 and the negative electrode 4 are composed of a metal film on the substrate 1 as shown in FIG. As shown in FIG. 2, the positive electrode 3 and the negative electrode 4 have substantially rectangular pad portions (feeding portions) 3a and 4a and linear wiring portions 3b and 4b. The pad portions 3a and 4a The applied voltage is configured to be applied to the light emitting unit 20 including the plurality of light emitting elements 2 through the wiring units 3b and 4b. As shown in FIG. 2, a cathode mark CM indicating the cathode is formed on the wiring portion 4b of the negative electrode 4.
　パッド部３ａ，４ａは、外部電源からの電圧が印加されるためのものである。パッド部３ａ，４ａは、図２に示すように、基板１上の角部における対角線の位置に、一対で形成されている。そして、パッド部３ａ，４ａは、導電性のワイヤＷによって、図示しない外部電源と電気的に接続されている。 The pad portions 3a and 4a are for applying a voltage from an external power source. As shown in FIG. 2, the pad portions 3 a and 4 a are formed as a pair at diagonal positions on the corners on the substrate 1. The pad portions 3a and 4a are electrically connected to an external power source (not shown) by a conductive wire W.
　配線部３ｂ，４ｂは、外部電源からパッド部３ａ，４ａに印加された電圧を、実装領域１ａ上の発光素子２へと伝達するためのものである。配線部３ｂ，４ｂは、図２に示すように、パッド部３ａ，４ａから延出するように形成されるとともに、実装領域１ａの周囲に略Ｌ字状で形成されている。 The wiring portions 3b and 4b are for transmitting the voltage applied to the pad portions 3a and 4a from the external power source to the light emitting element 2 on the mounting region 1a. As shown in FIG. 2, the wiring portions 3b and 4b are formed so as to extend from the pad portions 3a and 4a, and are formed in a substantially L shape around the mounting region 1a.
　正極３および負極４を構成する金属膜の素材は、Ａｕを用いることが好ましい。これは、後記するように、ワイヤＷの材料として熱伝導性に優れたＡｕを用いた場合に、同素材であるワイヤＷを強固に接合することができるためである。 It is preferable to use Au as a material for the metal film constituting the positive electrode 3 and the negative electrode 4. This is because, as will be described later, when Au having excellent thermal conductivity is used as the material of the wire W, the wire W that is the same material can be firmly bonded.
　正極３および負極４を構成する金属膜の形成方法としては、前記した実装領域１ａ上の金属膜の形成方法と同様に、電解めっきまたは無電解めっきで形成することが好ましい。なお、正極３および負極４を構成する金属膜の厚さは特に限定されず、ワイヤＷの数等、目的および用途に応じて適宜選択することができる。 As a method for forming the metal film constituting the positive electrode 3 and the negative electrode 4, it is preferable to form the metal film by electrolytic plating or electroless plating in the same manner as the method for forming the metal film on the mounting region 1a. In addition, the thickness of the metal film which comprises the positive electrode 3 and the negative electrode 4 is not specifically limited, According to the objectives and uses, such as the number of the wires W, it can select suitably.
　ここで、配線部３ｂ，４ｂの一部は、図１および図２に示すように、後記する光反射樹脂６によって覆われている。そのため、配線部３ｂ，４ｂを、前記したように光を吸収しやすいＡｕで形成した場合であっても、発光素子２から出射された光が配線部３ｂ，４ｂには到達せずに光反射樹脂６によって反射される。従って、出射光のロスを軽減することができ、発光装置１０１の光の取り出し効率を向上させることができる。 Here, a part of the wiring portions 3b and 4b is covered with a light reflecting resin 6 to be described later, as shown in FIGS. Therefore, even when the wiring portions 3b and 4b are formed of Au that easily absorbs light as described above, the light emitted from the light emitting element 2 does not reach the wiring portions 3b and 4b and is reflected by light. Reflected by the resin 6. Accordingly, loss of emitted light can be reduced, and light extraction efficiency of the light emitting device 101 can be improved.
　さらに、配線部３ｂ，４ｂの一部を光反射樹脂６によって覆うことにより、当該ワイヤＷを塵芥、水分、外力等から保護することができる。なお、ここでの配線部３ｂ，４ｂの一部とは、図２に示すように、配線部３ｂ，４ｂのうちで、実装領域１ａの周囲であって、実装領域１ａの辺に沿って形成された部分のことを意味している。 Furthermore, by covering a part of the wiring portions 3b and 4b with the light reflecting resin 6, the wire W can be protected from dust, moisture, external force and the like. Here, as shown in FIG. 2, the part of the wiring portions 3b and 4b is formed around the mounting region 1a and along the side of the mounting region 1a in the wiring portions 3b and 4b. It means the part that was made.
＜中継配線部＞
　中継配線部８は、正極３と負極４の間における配線を中継するためのものである。つまり中継配線部８が、複数の発光素子２の少なくとも１つと、その発光素子２のｐ電極と接続され、複数の発光素子２の少なくとも１つと、その発光素子２のｎ電極と接続されることで、正極３と負極４との間の配線を中継する。中継配線部８は、図２に示すように、基板１上の金属部材で構成されている。中継配線部８は、図２に示すように、実装領域１ａの周囲において、当該実装領域１ａの一辺、すなわち右側の辺に沿って直線状に形成されている。 <Relay wiring section>
The relay wiring part 8 is for relaying the wiring between the positive electrode 3 and the negative electrode 4. That is, the relay wiring portion 8 is connected to at least one of the plurality of light emitting elements 2 and the p electrode of the light emitting element 2, and is connected to at least one of the plurality of light emitting elements 2 and the n electrode of the light emitting element 2. Thus, the wiring between the positive electrode 3 and the negative electrode 4 is relayed. As shown in FIG. 2, the relay wiring portion 8 is composed of a metal member on the substrate 1. As shown in FIG. 2, the relay wiring portion 8 is formed in a straight line around one side of the mounting area 1a, that is, the right side, around the mounting area 1a.
　中継配線部８は、図２に示すように、後記する光反射樹脂６によって覆われている。そのため、後記するように、中継配線部８を構成する金属膜として光を吸収しやすいＡｕを用いた場合であっても、発光素子２から出射された光は中継配線部８には到達せずに光反射樹脂６によって反射される。従って、出射光のロスを軽減することができ、発光装置１０１の光の取り出し効率を向上させることができる。さらに、中継配線部８を光反射樹脂６によって覆うことにより、当該中継配線部８を塵芥、水分、外力等から保護することができる。 As shown in FIG. 2, the relay wiring portion 8 is covered with a light reflecting resin 6 described later. Therefore, as will be described later, even when Au that easily absorbs light is used as the metal film constituting the relay wiring portion 8, the light emitted from the light emitting element 2 does not reach the relay wiring portion 8. Reflected by the light reflecting resin 6. Accordingly, loss of emitted light can be reduced, and light extraction efficiency of the light emitting device 101 can be improved. Furthermore, by covering the relay wiring part 8 with the light reflecting resin 6, the relay wiring part 8 can be protected from dust, moisture, external force and the like.
　中継配線部８を構成する金属膜の素材は、正極３および負極４と同様に、Ａｕを用いることが好ましい。これは、後記するように、ワイヤＷの材料として熱伝導性に優れたＡｕを用いた場合に、同素材であるワイヤＷを強固に接合することができるためである。 As the material of the metal film constituting the relay wiring portion 8, it is preferable to use Au similarly to the positive electrode 3 and the negative electrode 4. This is because, as will be described later, when Au having excellent thermal conductivity is used as the material of the wire W, the wire W that is the same material can be firmly bonded.
　中継配線部８を構成する金属膜の形成方法としては、正極３および負極４と同様に、電解めっきまたは無電解めっきで形成することが好ましい。なお、中継配線部８を構成する金属膜の厚さは特に限定されず、ワイヤＷの数等、目的および用途に応じて適宜選択することができる。 As a method for forming the metal film constituting the relay wiring portion 8, it is preferable to form the metal film by electrolytic plating or electroless plating similarly to the positive electrode 3 and the negative electrode 4. In addition, the thickness of the metal film which comprises the relay wiring part 8 is not specifically limited, It can select suitably according to the objectives and uses, such as the number of the wires W.
　実施形態に係る発光装置は、図２に示すように、発光素子２が、正極３の配線部３ｂと中継配線部８との間においては、複数の発光素子２のｐ電極２Ａが実装領域１ａの一方向である左側を向くように、あるいは、複数の発光素子２のｎ電極２Ｂが実装領域１ａの他方向である右側を向くように配列されている。 As shown in FIG. 2, in the light emitting device according to the embodiment, between the light emitting element 2 and the wiring part 3 b of the positive electrode 3 and the relay wiring part 8, the p electrodes 2 </ b> A of the plurality of light emitting elements 2 are mounted in the mounting region 1 a. The n electrodes 2B of the plurality of light emitting elements 2 are arranged so as to face the right side, which is the other direction of the mounting region 1a.
　また、発光素子２は、図２に示すように、負極４の配線部４ｂと中継配線部８との間においては、複数の発光素子２のｐ電極２Ａが実装領域１ａの他方向である右側を向くように、かつ、複数の発光素子２のｎ電極２Ｂが実装領域１ａの一方向である左側を向くように、配列されている。すなわち、発光素子２は、図２を平面視した場合において、上方のグループ（領域）と下方のグループ（領域）とにおいて、中継配線部８の中央を境に向きが反転するように配置されている。 In addition, as shown in FIG. 2, the light emitting element 2 has a right side in which the p electrodes 2A of the plurality of light emitting elements 2 are in the other direction of the mounting region 1a between the wiring part 4b of the negative electrode 4 and the relay wiring part 8. The n electrodes 2B of the plurality of light emitting elements 2 are arranged so as to face the left side, which is one direction of the mounting region 1a. That is, the light emitting element 2 is arranged so that the direction is reversed with respect to the center of the relay wiring portion 8 in the upper group (region) and the lower group (region) in the plan view of FIG. Yes.
　実施形態に係る発光装置１０１においては、このように実装領域１ａの周囲に沿って中継配線部８を形成し、かつ、当該中継配線部８の中央を境に向きが反転するように発光素子２を配置することで、実装領域１ａの限られた面積内において、発光素子同士を接続する配線が複雑になることなく、直列接続される発光素子の数を増加させることができる。さらには、実装領域の限られた面積内において、複数の発光素子を密に配置することができ、一定の輝度に対して消費電力が向上した発光装置を、または一定の消費電力に対して発光効率が向上した発光装置を得ることができる。なお、実施形態に係る発光装置１０１においては、図２に示すように、発光素子２が１０個直列接続されるとともに、当該直列接続が４列分形成されている。 In the light emitting device 101 according to the embodiment, the relay wiring portion 8 is formed along the periphery of the mounting region 1a in this way, and the light emitting element 2 is turned so that the direction is reversed with the center of the relay wiring portion 8 as a boundary. With the arrangement, the number of light emitting elements connected in series can be increased without complicating the wiring for connecting the light emitting elements within the limited area of the mounting region 1a. Furthermore, within a limited area of the mounting area, a plurality of light emitting elements can be densely arranged, and a light emitting device with improved power consumption with respect to constant luminance or light emission with respect to constant power consumption. A light-emitting device with improved efficiency can be obtained. In the light emitting device 101 according to the embodiment, as shown in FIG. 2, ten light emitting elements 2 are connected in series, and the series connection is formed for four rows.
　配線部３ｂの一端部と、配線部４ｂの一端部とは、図２に示すように、実装領域１ａの周囲において互いに隣り合うように形成されている。このように、正極３および負極４の配線部３ｂ，４ｂを実装領域１ａの周囲に沿って形成し、かつ、その一端部を隣り合わせて形成することで、発光装置１０１のように複数の発光素子２を基板１上に配置した場合であっても、後記する保護素子５を適切な位置に配置することができる。従って、正負両電極間の電圧がツェナー電圧以上となることを防止することができ、過大な電圧が印加されることによる発光素子２の素子破壊や性能劣化の発生を適切に防止することができる。 As shown in FIG. 2, one end of the wiring part 3b and one end of the wiring part 4b are formed adjacent to each other around the mounting region 1a. In this way, the wiring portions 3b and 4b of the positive electrode 3 and the negative electrode 4 are formed along the periphery of the mounting region 1a, and one end portions thereof are formed adjacent to each other, so that a plurality of light emitting elements like the light emitting device 101 are formed. Even when 2 is disposed on the substrate 1, a protective element 5 described later can be disposed at an appropriate position. Therefore, it is possible to prevent the voltage between the positive and negative electrodes from becoming equal to or higher than the zener voltage, and to appropriately prevent element destruction and performance deterioration of the light emitting element 2 due to application of an excessive voltage. .
　配線部３ｂ，４ｂは、より具体的には、図２に示す略矩形状の実装領域１ａの一辺の範囲内において、その一端部が互いに隣り合うように形成されることが好ましい。このように、実装領域１ａの一辺の範囲内で隣り合うように配線部３ｂ，４ｂを形成することで、配線部３ｂ，４ｂと発光素子２とを電気的に接続するためのワイヤＷの設置面積を確保することができる。そのため、配線部３ｂ，４ｂと接続する発光素子２の数、すなわち直列接続の始点および終点となる発光素子２の数を増やすことができ、実装領域１ａ上における発光素子２の直列接続の列数を発光素子同士を接続する配線が複雑になることなく増加させることができる。そして、このように直列接続の列数を増加させることで、実装領域の限られた面積内において、複数の発光素子を密に配置することができ、一定の輝度に対して消費電力が向上した発光装置を、または一定の消費電力に対して発光効率が向上した発光装置を得ることができる。 More specifically, the wiring portions 3b and 4b are preferably formed such that one end portions thereof are adjacent to each other within the range of one side of the substantially rectangular mounting region 1a shown in FIG. In this manner, the wiring portions 3b and 4b are formed so as to be adjacent to each other within the range of one side of the mounting region 1a, thereby installing the wires W for electrically connecting the wiring portions 3b and 4b and the light emitting element 2. An area can be secured. Therefore, the number of the light emitting elements 2 connected to the wiring portions 3b and 4b, that is, the number of the light emitting elements 2 serving as the start point and the end point of the series connection can be increased. Can be increased without complicating the wiring connecting the light emitting elements. And by increasing the number of columns connected in series in this way, a plurality of light emitting elements can be densely arranged within a limited area of the mounting area, and power consumption is improved for a certain luminance. A light-emitting device or a light-emitting device with improved light emission efficiency with respect to constant power consumption can be obtained.
　また配線部３ｂの一端部と、配線部４ｂの一端部とが、実装領域１ａの周囲において互いに隣り合うような形態としては、図５に示す発光装置１０２とすることもできる。図５に示すように、配線部３ｂ，４ｂの一端部が、略矩形状の実装領域１ａの角部において、互いに隣り合うように形成されている。すなわち、配線部３ｂは、パッド部３ａから実装領域１ａの角部まで延出するように略Ｌ字状に形成されている。また、配線部４ｂは、パッド部４ａから実装領域１ａの角部まで延出するように直線状に形成されている。なお図５に示す発光装置１０２において、発光装置１０１と重複する構成については、同じ符号を付して説明を省略する。 Further, as a form in which one end portion of the wiring portion 3b and one end portion of the wiring portion 4b are adjacent to each other around the mounting region 1a, the light emitting device 102 shown in FIG. 5 may be used. As shown in FIG. 5, one end portions of the wiring portions 3b and 4b are formed adjacent to each other at the corners of the substantially rectangular mounting region 1a. That is, the wiring part 3b is formed in a substantially L shape so as to extend from the pad part 3a to the corner part of the mounting region 1a. The wiring part 4b is formed in a straight line so as to extend from the pad part 4a to the corner of the mounting region 1a. Note that in the light-emitting device 102 illustrated in FIG. 5, the same components as those of the light-emitting device 101 are denoted by the same reference numerals and description thereof is omitted.
　このように発光装置１０１は、正極３および負極４および中継配線部８を、実装領域１ａの周囲に沿って設け、正極３および負極４および中継配線部８と実装領域１ａとを、基板１上で離間して設ける。このように構成することで、発光装置１０１は、正極３、負極４、中継配線部８には、ワイヤＷと強固に接合できる素材（例えばＡｕ）を用い、実装領域１ａには、光反射率の高い素材（例えばＡｇ）を用いることが、それぞれにおいて可能となるため、光取り出し効率が向上した信頼性の高い発光装置を得ることができる。 As described above, the light emitting device 101 includes the positive electrode 3, the negative electrode 4, and the relay wiring portion 8 along the periphery of the mounting region 1 a, and the positive electrode 3, the negative electrode 4, the relay wiring portion 8, and the mounting region 1 a on the substrate 1. And spaced apart. With this configuration, the light emitting device 101 uses a material (for example, Au) that can be firmly bonded to the wire W for the positive electrode 3, the negative electrode 4, and the relay wiring portion 8, and has a light reflectance in the mounting region 1 a. Since it is possible to use a material having a high level (for example, Ag), a highly reliable light-emitting device with improved light extraction efficiency can be obtained.
＜光反射樹脂＞
　光反射樹脂６は、発光素子２から出射された光を反射させるためのものである。光反射樹脂６は、図２に示すように、配線部３ｂ，４ｂの一部、中継配線部８、後記する保護素子５およびこれらに接続されるワイヤＷを覆うように形成される。そのため、配線部３ｂ，４ｂ、中継配線部８およびワイヤＷを、前記あるいは後記したように光を吸収しやすいＡｕで形成した場合であっても、発光素子２から出射された光が配線部３ｂ，４ｂ、中継配線部８およびワイヤＷには到達せずに光反射樹脂６によって反射される。従って、出射光のロスを軽減することができ、発光装置１０１の光の取り出し効率を向上させることができる。さらに、配線部３ｂ，４ｂの一部、中継配線部８、保護素子５およびこれらに接続されるワイヤＷを光反射樹脂６によって覆うことによって、これらの部材を塵芥、水分、外力等から保護することができる。 <Light reflecting resin>
The light reflecting resin 6 is for reflecting the light emitted from the light emitting element 2. As shown in FIG. 2, the light reflecting resin 6 is formed so as to cover a part of the wiring portions 3b and 4b, the relay wiring portion 8, the protective element 5 described later, and the wire W connected thereto. Therefore, even when the wiring portions 3b and 4b, the relay wiring portion 8 and the wire W are formed of Au that easily absorbs light as described above or later, light emitted from the light emitting element 2 is transmitted to the wiring portion 3b. , 4b, the relay wiring portion 8 and the wire W are not reflected and are reflected by the light reflecting resin 6. Accordingly, loss of emitted light can be reduced, and light extraction efficiency of the light emitting device 101 can be improved. Furthermore, by covering a part of the wiring portions 3b and 4b, the relay wiring portion 8, the protection element 5 and the wire W connected thereto with the light reflecting resin 6, these members are protected from dust, moisture, external force and the like. be able to.
　光反射樹脂６は、図１および図２に示すように、基板１上において発光部２０が形成された実装領域１ａを囲うように四角枠状に形成されることが好ましい。このように実装領域１ａの周囲を囲うように光反射樹脂６を形成することで、例えば図４の左右両側に配置された発光素子２から出射された光のように、基板１の実装領域１ａの周囲に向う光も光反射樹脂６によって反射することができる。従って、出射光のロスを軽減することができ、発光装置１０１の光の取り出し効率を向上させることができる。 As shown in FIGS. 1 and 2, the light reflecting resin 6 is preferably formed in a square frame shape so as to surround the mounting region 1 a where the light emitting part 20 is formed on the substrate 1. By forming the light reflecting resin 6 so as to surround the periphery of the mounting region 1a in this way, the mounting region 1a of the substrate 1 is, for example, light emitted from the light emitting elements 2 arranged on the left and right sides in FIG. The light directed to the surroundings can also be reflected by the light reflecting resin 6. Accordingly, loss of emitted light can be reduced, and light extraction efficiency of the light emitting device 101 can be improved.
　また、光反射樹脂６は、図２に示すように、実装領域１ａの周縁となる領域の一部を覆うように形成することが好ましい。このように、実装領域１ａの周縁の一部を覆うように光反射樹脂６を形成することで、配線部３ｂ，４ｂと実装領域１ａ上の金属膜との間に基板１が露出した領域が形成されることがなくなる。従って、発光素子２から出射された光を、光反射樹脂６が形成された内部の領域において全て反射させることができるため、出射光のロスを最大限軽減することができ、発光装置１０１の光の取り出し効率をより向上させることができる。 Further, as shown in FIG. 2, the light reflecting resin 6 is preferably formed so as to cover a part of the region that becomes the periphery of the mounting region 1a. Thus, by forming the light reflecting resin 6 so as to cover a part of the periphery of the mounting region 1a, a region where the substrate 1 is exposed between the wiring portions 3b and 4b and the metal film on the mounting region 1a is formed. It will not be formed. Therefore, since all the light emitted from the light emitting element 2 can be reflected in the inner region where the light reflecting resin 6 is formed, the loss of the emitted light can be reduced to the maximum, and the light emitted from the light emitting device 101 can be reduced. The taking-out efficiency can be further improved.
　光反射樹脂６の材料としては、絶縁材料を用いることが好ましい。また、ある程度の強度を確保するために、例えば熱硬化性樹脂、熱可塑性樹脂等を用いることができる。より具体的には、フェノール樹脂、エポキシ樹脂、ＢＴレジンや、ＰＰＡやシリコン樹脂などが挙げられる。また、これらの母体となる樹脂に、発光素子２からの光を吸収しにくく、かつ母体となる樹脂に対する屈折率差の大きい反射部材（例えばＴｉＯ２，Ａｌ２Ｏ３，ＺｒＯ２，ＭｇＯ）等の粉末を分散することで、効率よく光を反射させることができる。なお、光反射樹脂６のサイズは特に限定されず、目的および用途に応じて適宜選択することができる。また、光反射樹脂６の位置に、樹脂と異なる材料からなる光反射部材を形成することもできる。 As a material of the light reflecting resin 6, an insulating material is preferably used. Moreover, in order to ensure a certain amount of strength, for example, a thermosetting resin, a thermoplastic resin, or the like can be used. More specifically, a phenol resin, an epoxy resin, a BT resin, PPA, a silicon resin, etc. are mentioned. In addition, a reflective member (for example, TiO 2 , Al 2 O 3 , ZrO 2 , MgO) or the like that hardly absorbs light from the light-emitting element 2 and has a large refractive index difference with respect to the base resin is used in the base resin. By dispersing this powder, light can be reflected efficiently. The size of the light reflecting resin 6 is not particularly limited, and can be appropriately selected according to the purpose and application. In addition, a light reflecting member made of a material different from the resin can be formed at the position of the light reflecting resin 6.
＜封止部材＞
　封止部材７は、基板１に配置された発光素子２、保護素子５およびワイヤＷ等を、塵芥、水分、外力等から保護するための部材である。封止部材７は、図１、図２および図４に示すように、基板１上において、光反射樹脂６で囲った実装領域１ａ内に樹脂を充填することで形成される。 <Sealing member>
The sealing member 7 is a member for protecting the light emitting element 2, the protective element 5, the wire W, and the like disposed on the substrate 1 from dust, moisture, external force, and the like. As shown in FIGS. 1, 2, and 4, the sealing member 7 is formed by filling a resin in the mounting region 1 a surrounded by the light reflecting resin 6 on the substrate 1.
　封止部材７の材料としては、発光素子２からの光を透過可能な透光性を有するものが好ましい。具体的な材料としては、シリコン樹脂、エポキシ樹脂、ユリア樹脂等を挙げることができる。また、このような材料に加えて、所望に応じて着色剤、光拡散剤、フィラー、蛍光部材等を含有させることもできる。 As the material of the sealing member 7, a material having translucency capable of transmitting light from the light emitting element 2 is preferable. Specific examples of the material include silicon resin, epoxy resin, and urea resin. In addition to such materials, a colorant, a light diffusing agent, a filler, a fluorescent member, and the like can be contained as desired.
　なお、封止部材７は、単一の部材で形成することもできるし、あるいは、２層以上の複数の層として形成することもできる。また、封止部材７の充填量は、光反射樹脂６で囲った実装領域１ａ内に配置される発光素子２、保護素子５、ワイヤＷ等が被覆される量であればよい。また、封止部材７にレンズ機能をもたせる場合は、封止部材７の表面を盛り上がらせて砲弾型形状や凸レンズ形状としてもよい。 The sealing member 7 can be formed as a single member or can be formed as a plurality of layers of two or more layers. The filling amount of the sealing member 7 may be an amount that covers the light emitting element 2, the protective element 5, the wire W, and the like disposed in the mounting region 1 a surrounded by the light reflecting resin 6. Further, when the sealing member 7 has a lens function, the surface of the sealing member 7 may be raised so as to have a bullet shape or a convex lens shape.
＜蛍光部材＞
　封止部材７中に、波長変換部材として発光素子２からの光の少なくとも一部を吸収して異なる波長を有する光を発する蛍光部材を含有させることもできる。蛍光部材としては、発光素子２からの光をより長波長に変換させるものが好ましい。また、蛍光部材は１種の蛍光物質等を単層で形成してもよいし、２種以上の蛍光物質等が混合されたものを単層として形成してもよい。あるいは、１種の蛍光物質等を含有する単層を２層以上積層させてもよいし、２種以上の蛍光物質等がそれぞれ混合された単層を２層以上積層させてもよい。 <Fluorescent member>
The sealing member 7 may include a fluorescent member that emits light having a different wavelength by absorbing at least a part of the light from the light emitting element 2 as a wavelength conversion member. As the fluorescent member, one that converts light from the light emitting element 2 into a longer wavelength is preferable. In addition, the fluorescent member may be formed as a single layer of one type of fluorescent material or may be formed as a single layer by mixing two or more types of fluorescent materials. Alternatively, two or more single layers containing one kind of fluorescent substance or the like may be laminated, or two or more single layers each containing two or more kinds of fluorescent substances may be laminated.
　蛍光部材の材料としては、例えばイットリウム、アルミニウムおよびガーネットを混合したＹＡＧ系蛍光体、Ｅｕ，Ｃｅ等のランタノイド系元素で主に賦活される、窒化物系蛍光体、酸窒化物系蛍光体を用いることができる。 As the material of the fluorescent member, for example, a YAG phosphor mixed with yttrium, aluminum and garnet, a nitride phosphor or an oxynitride phosphor mainly activated by a lanthanoid element such as Eu or Ce is used. be able to.
＜ワイヤ＞
　ワイヤＷは、発光素子２や後記する保護素子５等の電子部品と、正極３、負極４および中継配線部８等を電気的に接続するための導電性の配線である。ワイヤＷの材料としては、Ａｕ、Ｃｕ（銅）、Ｐｔ（白金）、Ａｌ（アルミニウム）等の金属、および、それらの合金を用いたものが挙げられるが、特に、熱伝導率等に優れたＡｕを用いるのが好ましい。なお、ワイヤＷの径は特に限定されず、目的および用途に応じて適宜選択することができる。 <Wire>
The wire W is a conductive wiring for electrically connecting electronic components such as the light emitting element 2 and a protective element 5 described later to the positive electrode 3, the negative electrode 4, the relay wiring portion 8, and the like. Examples of the material of the wire W include those using metals such as Au, Cu (copper), Pt (platinum), and Al (aluminum), and alloys thereof, and in particular, excellent in thermal conductivity and the like. It is preferable to use Au. In addition, the diameter of the wire W is not specifically limited, It can select suitably according to the objective and a use.
　ここで、ワイヤＷと、正極３、負極４および中継配線部８との接続部分は、図２に示すように、光反射樹脂６によって覆われている。そのため、前記したように、ワイヤＷを構成する材料として光を吸収しやすいＡｕを用いた場合であっても、発光素子２から出射された光はワイヤＷには吸収されずに光反射樹脂６によって反射される。従って、出射光のロスを軽減することができ、発光装置１０１の光の取り出し効率を向上させることができる。さらに、ワイヤＷと、正極３、負極４および中継配線部８との接続部分を光反射樹脂６によって覆うことにより、当該ワイヤＷを塵芥、水分、外力等から保護することができる。 Here, the connection portion between the wire W and the positive electrode 3, the negative electrode 4, and the relay wiring portion 8 is covered with a light reflecting resin 6, as shown in FIG. Therefore, as described above, even when Au, which easily absorbs light, is used as the material constituting the wire W, the light emitted from the light emitting element 2 is not absorbed by the wire W, but the light reflecting resin 6 Is reflected by. Accordingly, loss of emitted light can be reduced, and light extraction efficiency of the light emitting device 101 can be improved. Furthermore, by covering the connection portion between the wire W and the positive electrode 3, the negative electrode 4, and the relay wiring portion 8 with the light reflecting resin 6, the wire W can be protected from dust, moisture, external force, and the like.
＜保護素子＞
　保護素子５は、複数の発光素子２からなる発光部２０を、過大な電圧印加による素子破壊や性能劣化から保護するための素子として形成されている。保護素子５は、図２に示すように、正極３の配線部３ｂの一端部に配置され、負極４の配線部４ｂの一端部とワイヤで接続される。ただし、保護素子５は、負極４の配線部４ｂの一端部に配置され、正極３の配線部３ｂの一端部とワイヤで接続されていてもよい。 <Protective element>
The protection element 5 is formed as an element for protecting the light emitting unit 20 composed of the plurality of light emitting elements 2 from element destruction and performance deterioration due to excessive voltage application. As shown in FIG. 2, the protective element 5 is disposed at one end of the wiring portion 3 b of the positive electrode 3 and is connected to one end of the wiring portion 4 b of the negative electrode 4 by a wire. However, the protective element 5 may be disposed at one end of the wiring portion 4b of the negative electrode 4 and connected to one end of the wiring portion 3b of the positive electrode 3 by a wire.
　保護素子５は、具体的には、規定電圧以上の電圧が印加されると通電状態になるツェナーダイオード（Zener Diode）で構成される。保護素子５は、図示は省略したが、前記した発光素子２と同様にｐ電極とｎ電極とを有する半導体素子であり、発光素子２のｐ電極２Ａとｎ電極２Ｂに対して逆並列となるように、ワイヤＷによって負極４の配線部４ｂと電気的に接続される。なお、保護素子５が埋設された場所の近傍には発光素子２を配置することができない。従って、保護素子５に最も近い４行１列目の発光素子２は、図２に示すように、保護素子５が埋設された領域から離れた場所にワイヤＷによって接続される。 Specifically, the protection element 5 is configured by a Zener diode that is energized when a voltage higher than a specified voltage is applied. Although not shown, the protective element 5 is a semiconductor element having a p-electrode and an n-electrode like the light-emitting element 2 described above, and is antiparallel to the p-electrode 2A and the n-electrode 2B of the light-emitting element 2. Thus, the wire W is electrically connected to the wiring portion 4 b of the negative electrode 4. In addition, the light emitting element 2 cannot be disposed in the vicinity of the place where the protective element 5 is embedded. Therefore, the light emitting element 2 in the fourth row and the first column closest to the protection element 5 is connected by a wire W to a place away from the area where the protection element 5 is embedded, as shown in FIG.
　この保護素子５があることにより、正極３と負極４との間に過大な電圧が印加されてその電圧がツェナーダイオードのツェナー電圧を超えたとしても、発光素子２の正負両電極間がツェナー電圧に保持され、このツェナー電圧以上になることがない。従って、保護素子５を備えることによって、正負両電極間の電圧がツェナー電圧以上となることを防止することができ、過大な電圧が印加されることによる発光素子２の素子破壊や性能劣化の発生を適切に防止することができる。 Due to the presence of the protective element 5, even if an excessive voltage is applied between the positive electrode 3 and the negative electrode 4 and the voltage exceeds the Zener voltage of the Zener diode, the Zener voltage between the positive and negative electrodes of the light emitting element 2 is maintained. And does not exceed this Zener voltage. Therefore, by providing the protective element 5, it is possible to prevent the voltage between the positive and negative electrodes from becoming a Zener voltage or higher, and the occurrence of element destruction or performance deterioration of the light emitting element 2 due to application of an excessive voltage. Can be prevented appropriately.
　保護素子５は、図２に示すように、光反射樹脂６によって覆われている。従って、保護素子５および保護素子５に接続されるワイヤＷが、塵芥、水分、外力等から保護される。なお、保護素子５のサイズは特に限定されず、目的および用途に応じて適宜選択することができる。 The protective element 5 is covered with a light reflecting resin 6 as shown in FIG. Therefore, the protection element 5 and the wire W connected to the protection element 5 are protected from dust, moisture, external force, and the like. In addition, the size of the protective element 5 is not particularly limited, and can be appropriately selected according to the purpose and application.
［発光装置の動作］
　以上説明した発光装置１０１によれば、発光装置１０１を駆動した時に、発光素子２からあらゆる方向に進む光のうち、上方に進む光は発光装置１０１の上方の外部に取り出される。また、下方や横方向等に進む光は、基板１の実装領域１ａにおける底面や側面で反射して、発光装置１０１の上方に取り出されることになる。この時、基板１の底面、すなわち実装領域１ａには好ましくは金属膜が被覆され、実装領域１ａの周囲には光反射樹脂６が形成されているため、この部位による光の吸収が抑制されるとともに、金属膜や光反射樹脂６により光が反射される。これにより、発光素子２からの光が効率良く取り出される。また、発光装置１０１は、中継配線部８により直列接続される発光素子２の数を増加させることができるため、一定の輝度に対して消費電力を向上させる、あるいは、一定の消費電力に対して発光効率を向上させることができる。したがって、発光装置１０１は、種々の容量および出力電圧の電源に適した構成とすることができる。 [Operation of light emitting device]
According to the light emitting device 101 described above, when the light emitting device 101 is driven, out of the light traveling in all directions from the light emitting element 2, the light traveling upward is extracted outside the light emitting device 101. Further, the light traveling downward or laterally is reflected by the bottom surface or the side surface of the mounting region 1 a of the substrate 1 and extracted above the light emitting device 101. At this time, the bottom surface of the substrate 1, that is, the mounting region 1a is preferably coated with a metal film, and the light reflecting resin 6 is formed around the mounting region 1a, so that light absorption by this portion is suppressed. At the same time, the light is reflected by the metal film or the light reflecting resin 6. Thereby, the light from the light emitting element 2 is extracted efficiently. Further, since the light emitting device 101 can increase the number of light emitting elements 2 connected in series by the relay wiring unit 8, the power consumption can be improved for a certain luminance, or the constant power consumption can be increased. Luminous efficiency can be improved. Therefore, the light-emitting device 101 can have a configuration suitable for power supplies with various capacities and output voltages.
［発光装置の製造方法］
　次に、本発明の第１の実施形態に係る発光装置１００の製造方法について、簡単に説明する。発光装置１０１の製造方法は、基板作製工程と、めっき工程と、ダイボンディング工程と、ワイヤボンディング工程と、光反射樹脂形成工程と、を含む。また、光反射樹脂形成工程の後に、封止部材充填工程を含んでもよい。さらにここでは、保護素子接合工程を含む。以下、各工程について説明する。なお、発光装置１０１の構成については前記説明した通りであるので、ここでは適宜、説明を省略する。 [Method for Manufacturing Light Emitting Device]
Next, a method for manufacturing the light emitting device 100 according to the first embodiment of the present invention will be briefly described. The manufacturing method of the light emitting device 101 includes a substrate manufacturing process, a plating process, a die bonding process, a wire bonding process, and a light reflecting resin forming process. Moreover, you may include the sealing member filling process after the light reflection resin formation process. Furthermore, a protection element joining process is included here. Hereinafter, each step will be described. Note that since the configuration of the light emitting device 101 is as described above, the description thereof will be omitted as appropriate.
＜基板作製工程＞
　基板作製工程は、めっき用配線が形成された基板１を作製する工程である。基板作製工程では、基板１上の実装領域１ａや、正極３および負極４となる部位を所定の形状にパターニングすることで形成する。また、基板作製工程では、電解めっきによって基板１上の実装領域１ａに金属膜を形成するためのめっき用配線を形成する。 <Substrate manufacturing process>
A board | substrate preparation process is a process of producing the board | substrate 1 with which the wiring for plating was formed. In the substrate manufacturing process, the mounting region 1a on the substrate 1 and the portions to be the positive electrode 3 and the negative electrode 4 are formed by patterning into a predetermined shape. Further, in the substrate manufacturing process, a plating wiring for forming a metal film on the mounting region 1a on the substrate 1 is formed by electrolytic plating.
＜めっき工程＞
　めっき工程は、前記めっき配線が形成された基板１上に、少なくとも正極３、負極４および中継配線部８を構成する金属部材を形成する工程であり、好ましくは無電解めっきにより正極３および負極４を構成する金属部材を形成するとともに、基板１上の実装領域１ａ上に、電解めっきにより金属膜を形成する工程である。 <Plating process>
The plating step is a step of forming at least the positive electrode 3, the negative electrode 4 and the relay wiring portion 8 on the substrate 1 on which the plated wiring is formed, and preferably the positive electrode 3 and the negative electrode 4 by electroless plating. And forming a metal film on the mounting region 1a on the substrate 1 by electrolytic plating.
　めっきの具体的な方法としては、正極３、負極４および中継配線部８と実装領域１ａ上の金属膜の両方にＡｕめっきを行う方法、正極３、負極４および中継配線部８のみにＡｕめっきを行い、実装領域１ａ上の金属膜を形成しない方法、正極３、負極４および中継配線部８にＡｕめっきを行い、実装領域１ａ上にＡｇめっきを行う方法、などが挙げられる。また、実装領域１ａ上には、ＡｕめっきやＡｇめっきを行う場合はＡｕまたはＡｇの表面に、まためっきを行わない場合は直接基板表面に、さらにＴｉＯ２膜を形成することが好ましい。 As a specific method of plating, a method of performing Au plating on both the positive electrode 3, the negative electrode 4 and the relay wiring portion 8 and the metal film on the mounting region 1 a, an Au plating only on the positive electrode 3, the negative electrode 4 and the relay wiring portion 8. And a method in which a metal film on the mounting region 1a is not formed, a method in which Au plating is performed on the positive electrode 3, the negative electrode 4, and the relay wiring portion 8 and Ag plating is performed on the mounting region 1a. Further, on the mounting region 1a, it is preferable to further form a TiO 2 film on the surface of Au or Ag when performing Au plating or Ag plating, or directly on the substrate surface when not performing plating.
＜ダイボンディング工程＞
　ダイボンディング工程は、前記金属膜上に発光素子２を載置する工程である。ダイボンディング工程は、基板１上の金属膜に、接合部材を介して、発光素子２を載置する発光素子載置工程と、発光素子２を載置した後に、接合部材を加熱し、発光素子２を基板１上の金属膜上に接合する加熱工程と、を行う。 <Die bonding process>
The die bonding step is a step of placing the light emitting element 2 on the metal film. In the die bonding step, the light emitting element placement step for placing the light emitting element 2 on the metal film on the substrate 1 via the joining member, and after the light emitting element 2 is placed, the joining member is heated, A heating step of bonding 2 to a metal film on the substrate 1.
＜保護素子接合工程＞
　保護素子を設ける場合、保護素子接合工程は、前記正極３の配線部３ｂ上に保護素子５を載置して接合する工程である。保護素子５を載置、接合する方法は、前記ダイボンディング工程と同様であるので、ここでは説明を省略する。 <Protective element bonding process>
When providing the protective element, the protective element joining step is a step of placing the protective element 5 on the wiring portion 3b of the positive electrode 3 and joining them. Since the method for mounting and bonding the protective element 5 is the same as that in the die bonding step, description thereof is omitted here.
＜ワイヤボンディング工程＞
　ワイヤボンディング工程は、前記ダイボンディング工程の後に、金属部材の正極３の配線部３ｂと、発光素子２上部にあるｐパッド電極２Ａａとを、ワイヤＷで電気的に接続する工程である。同じく、発光素子２上部にあるｎパッド電極２Ｂａと、金属部材の負極４の配線部４ｂと、をワイヤＷで電気的に接続する工程である。さらに、この工程では、複数の発光素子２をそれぞれｐパッド電極２Ａａおよびｎパッド電極２Ｂａを介して接続する。また、保護素子５と負極４との電気的な接続もこの工程で行えばよい。すなわち、保護素子５のｎ電極と、負極４の配線部４ｂとをワイヤＷで接続する。なお、ワイヤＷの接続方法は、特に限定されるものではなく、通常用いられる方法で行えばよい。 <Wire bonding process>
The wire bonding step is a step of electrically connecting the wiring portion 3b of the positive electrode 3 of the metal member and the p pad electrode 2Aa above the light emitting element 2 with the wire W after the die bonding step. Similarly, this is a step of electrically connecting the n pad electrode 2Ba above the light emitting element 2 and the wiring portion 4b of the negative electrode 4 of the metal member with a wire W. Further, in this step, the plurality of light emitting elements 2 are connected through the p pad electrode 2Aa and the n pad electrode 2Ba, respectively. Further, the electrical connection between the protective element 5 and the negative electrode 4 may be performed in this step. That is, the n electrode of the protection element 5 and the wiring part 4 b of the negative electrode 4 are connected by the wire W. In addition, the connection method of the wire W is not specifically limited, What is necessary is just to perform by the method used normally.
＜光反射樹脂形成工程＞
　光反射樹脂形成工程は、前記ワイヤボンディング工程の後に、前記実装領域１ａの周縁に沿って、少なくとも配線部３ｂ，４ｂの一部および中継配線部８を覆うように光反射樹脂６を形成する工程である。光反射樹脂６の形成は、例えば、固定された基板１の上側において、基板１に対して上下方向あるいは水平方向などに移動（可動）させることができる樹脂吐出装置を用いて行うことができる（特開２００９－１８２３０７号公報参照）。 <Light reflecting resin formation process>
The light reflecting resin forming step is a step of forming the light reflecting resin 6 so as to cover at least a part of the wiring portions 3b and 4b and the relay wiring portion 8 along the peripheral edge of the mounting region 1a after the wire bonding step. It is. The light reflecting resin 6 can be formed by using, for example, a resin discharge device that can move (movable) in the vertical direction or the horizontal direction with respect to the substrate 1 above the fixed substrate 1 (see FIG. (See JP2009-182307).
＜封止部材充填工程＞
　封止部材充填工程は、前記光反射樹脂６の内側に、前記発光素子２および前記金属膜を被覆する透光性の封止部材７を充填する工程である。すなわち、発光素子２、保護素子５、実装領域１ａ上の金属膜およびワイヤＷ等を被覆する封止部材７を、基板１上に形成された光反射樹脂６からなる壁部の内部に溶融樹脂を注入し、その後加熱や光照射等によって硬化する工程である。 <Sealing member filling process>
The sealing member filling step is a step of filling a light-transmitting sealing member 7 covering the light emitting element 2 and the metal film inside the light reflecting resin 6. That is, the sealing member 7 that covers the light emitting element 2, the protective element 5, the metal film on the mounting region 1 a, the wire W, and the like is formed inside the wall portion made of the light reflecting resin 6 formed on the substrate 1. Is then cured by heating, light irradiation, or the like.
［第２実施形態］
　第２実施形態に係る発光装置１０３について、図６を参照しながら詳細に説明する。発光装置１０３は、図６に示すように、２つの中継配線部８ａ，８ｂを設け、実装領域１ａ内に発光素子２を適切に配置した以外は、前記した第１実施形態に係る発光装置１０１と同様の構成を備えている。従って、前記した発光装置１０１と重複する構成については、同じ符号を付して説明を省略する。また、発光装置１０３は、前記した発光装置１０１と、全体構成（図１）および発光素子の構成（図３）が同じであるため、これらについても説明を省略する。 [Second Embodiment]
The light emitting device 103 according to the second embodiment will be described in detail with reference to FIG. As shown in FIG. 6, the light emitting device 103 is provided with two relay wiring portions 8a and 8b, and the light emitting device 101 according to the first embodiment described above except that the light emitting element 2 is appropriately arranged in the mounting region 1a. It has the same configuration as Therefore, the same components as those of the light emitting device 101 described above are denoted by the same reference numerals and description thereof is omitted. The light emitting device 103 has the same overall configuration (FIG. 1) and light emitting element configuration (FIG. 3) as the above-described light emitting device 101, and thus description thereof is also omitted.
　発光装置１０３は、中継配線部を２つ設けており、複数の発光素子２の一部が２つの中継配線部８ａ，８ｂに挟まれて配列されている。具体的には、正極３の配線部３ｂと中継配線部８ａ（以下、第１の中継配線部８ａと称することがある）との間（図６において、１１に示す領域）においては、複数の発光素子２のｐ電極２Ａが実装領域１ａの一方向である左側を向くように配列されている。そして、発光装置１０３は、中継配線部（第１の中継配線部）８ａと中継配線部８ａとは別の中継配線部８ｂ（以下、第２の中継配線部８ｂと称することがある）との間（図６において、１２に示す領域）においては、複数の発光素子２のｐ電極２Ａが実装領域１ａの他方向である右側を向くように配列されている。さらに、発光装置１０３は、中継配線部（第２の中継配線部）８ｂと負極４の配線部４ｂとの間（図６において、１３に示す領域）においては、複数の発光素子２のｐ電極２Ａが実装領域１ａの一方向である左側を向くように配列されている。 The light emitting device 103 is provided with two relay wiring portions, and a part of the plurality of light emitting elements 2 is arranged between two relay wiring portions 8a and 8b. Specifically, in the space between the wiring portion 3b of the positive electrode 3 and the relay wiring portion 8a (hereinafter sometimes referred to as the first relay wiring portion 8a) (the region indicated by 11 in FIG. 6), a plurality of The p electrodes 2A of the light emitting elements 2 are arranged so as to face the left side, which is one direction of the mounting region 1a. The light emitting device 103 is connected to a relay wiring portion (first relay wiring portion) 8a and a relay wiring portion 8b (hereinafter, sometimes referred to as a second relay wiring portion 8b) different from the relay wiring portion 8a. In the space (region indicated by 12 in FIG. 6), the p electrodes 2A of the plurality of light emitting elements 2 are arranged so as to face the right side, which is the other direction of the mounting region 1a. Further, the light emitting device 103 includes p electrodes of a plurality of light emitting elements 2 between the relay wiring portion (second relay wiring portion) 8b and the wiring portion 4b of the negative electrode 4 (a region indicated by 13 in FIG. 6). 2A is arranged so as to face the left side which is one direction of the mounting area 1a.
　すなわち、発光素子２は、図６を平面視した場合において、第１の中継配線部８ａを境に、さらに第２の中継配線部８ｂを境に向きが反転するように配置されている。
　つまり、実装領域１ａ上において、配線部３ｂ，４ｂと中継配線部とが向かい合う領域１１，１３をそれぞれ１つ設け、中継配線部同士が向かい合う領域１２の数を増やすことで、実装領域１ａ内において、直列接続される発光素子の数を、さらには直列接続の列数を増加させることができる。 That is, the light emitting element 2 is arranged so that the direction is reversed with the first relay wiring portion 8a as a boundary and the second relay wiring portion 8b as a boundary when FIG. 6 is viewed in plan.
That is, on the mounting area 1a, by providing one each of the areas 11 and 13 where the wiring parts 3b and 4b and the relay wiring part face each other and increasing the number of areas 12 where the relay wiring parts face each other, In addition, the number of light emitting elements connected in series and the number of series connected columns can be increased.
　このように実装領域１ａの周囲に沿って、中継配線部８を１つのみならず複数設けることで、実装領域１ａの限られた面積内において、直列接続される発光素子２の数を増加させることができる。さらには、実装領域１ａの限られた面積内において、複数の発光素子２を密に配置することができ、一定の輝度に対して消費電力が向上した発光装置を、または一定の消費電力に対して発光効率が向上した発光装置を得ることができる。 In this way, by providing not only one relay wiring portion 8 but also a plurality along the periphery of the mounting region 1a, the number of light emitting elements 2 connected in series is increased within a limited area of the mounting region 1a. be able to. Furthermore, within a limited area of the mounting region 1a, a plurality of light emitting elements 2 can be densely arranged, and a light emitting device with improved power consumption with respect to constant luminance, or with respect to constant power consumption. Thus, a light emitting device with improved luminous efficiency can be obtained.
　たとえば、配線部３ｂと第１の中継配線部８ａとの間で、６個の発光素子２が直列接続されるような実装領域１ａの場合、第１の中継配線部８ａと第２の中継配線部８ｂとの間にも６個の発光素子２が直列接続され、さらに第２の中継配線部８ｂと配線部４ｂとの間にも６個の発光素子２が直列接続されるようになり、発光装置全体でみて、１８個の発光素子２が直列接続されるようになる。つまり実装領域１ａの一辺方向に見て、Ｘ個の発光素子２が直列接続されるような実装領域１ａである場合、中継配線部の数Ｙ（少なくとも１つの中継配線部を有する、Ｙは正の整数）と発光装置全体での直列接続の数Ｚとの関係が、Ｚ＝Ｘ（Ｙ＋１）で表わされ、中継配線部の数Ｙを増やすほど、発光装置全体での直列接続の数Ｚを大きくすることができる。これにより、実装領域が一定の面積内において容易に直列接続される発光素子の数を増加させることが可能となる。 For example, in the case of the mounting region 1a in which six light emitting elements 2 are connected in series between the wiring portion 3b and the first relay wiring portion 8a, the first relay wiring portion 8a and the second relay wiring The six light emitting elements 2 are also connected in series with the portion 8b, and the six light emitting elements 2 are also connected in series between the second relay wiring portion 8b and the wiring portion 4b. In the whole light emitting device, 18 light emitting elements 2 are connected in series. That is, when the mounting region 1a is such that X light emitting elements 2 are connected in series when viewed in one direction of the mounting region 1a, the number Y of relay wiring portions (having at least one relay wiring portion, where Y is positive) ) And the number Z of series connections in the entire light emitting device is expressed by Z = X (Y + 1), and the number Z of series connections in the entire light emitting device increases as the number Y of relay wiring portions increases. Can be increased. This makes it possible to increase the number of light emitting elements that are easily connected in series within a certain area of the mounting region.
［第３実施形態］
　第３実施形態に係る発光装置１０４について、図７を参照しながら詳細に説明する。発光装置１０４は、図７に示すように、保護素子５と保護素子を接続するための保護素子配線部９を備え、発光素子２の配列状態および発光素子２に接続するワイヤＷの接続状態以外は、前記した第２実施形態に係る発光装置１０３と同様の構成を備えている。従って、前記した発光装置１０１および発光装置１０３と重複する構成については、同じ符号を付して説明を省略する。また、発光装置１０４は、前記した発光装置１０１と、全体構成（図１）および発光素子の構成（図２（ｂ））が同じであるため、これらについても説明を省略する。 [Third Embodiment]
The light emitting device 104 according to the third embodiment will be described in detail with reference to FIG. As shown in FIG. 7, the light emitting device 104 includes a protective element wiring portion 9 for connecting the protective element 5 and the protective element, and other than the arrangement state of the light emitting elements 2 and the connection state of the wires W connected to the light emitting elements 2. Has the same configuration as the light emitting device 103 according to the second embodiment described above. Therefore, the same components as those of the light emitting device 101 and the light emitting device 103 described above are denoted by the same reference numerals and description thereof is omitted. The light-emitting device 104 has the same overall configuration (FIG. 1) and light-emitting element configuration (FIG. 2B) as the above-described light-emitting device 101, and thus description thereof is also omitted.
　発光装置１０４は、第２実施形態にかかる発光装置１０３に保護素子５を設けたものである。正極３の配線部３ｂにツェナーダイオードからなる保護素子５が形成され、実装領域１ａの周囲であって、さらに中継配線部８ａよりも外側に保護素子５を負極４と電気的に接続するための保護素子配線部９を備え、保護素子５と保護素子配線部９とがワイヤＷにより、さらに保護素子配線部９と負極４の配線部４ｂとがワイヤＷによりそれぞれ接続されている。このように保護素子配線部９を設けることで、正極３と負極４が基板上で離れた発光装置において容易に保護素子５を設けることが可能となる。 The light emitting device 104 is obtained by providing the protective element 5 to the light emitting device 103 according to the second embodiment. A protective element 5 made of a Zener diode is formed on the wiring part 3b of the positive electrode 3, and is used to electrically connect the protective element 5 to the negative electrode 4 around the mounting region 1a and further outside the relay wiring part 8a. The protection element wiring part 9 is provided, and the protection element 5 and the protection element wiring part 9 are connected by a wire W, and the protection element wiring part 9 and the wiring part 4b of the negative electrode 4 are connected by a wire W, respectively. By providing the protective element wiring portion 9 in this manner, the protective element 5 can be easily provided in the light emitting device in which the positive electrode 3 and the negative electrode 4 are separated on the substrate.
　さらに保護素子５，保護素子配線部９およびこれらに接続されるワイヤＷは光反射性樹脂６に覆われていることが好ましい。これらも配線部３ｂ，４ｂや中継配線部８ａ，８ｂを覆う光反射性樹脂６で覆うことにより、これらの部材を塵芥、水分、外力等から保護することができる。 Further, it is preferable that the protective element 5, the protective element wiring portion 9, and the wire W connected thereto are covered with the light reflective resin 6. These members can also be protected from dust, moisture, external force, etc. by covering them with the light-reflective resin 6 that covers the wiring parts 3b, 4b and the relay wiring parts 8a, 8b.
　この保護素子配線部９は、正極３、負極４および中継配線部８ａ，８ｂと同じく金属材料で形成され、同じ金属材料で形成されていてもよく、また製造方法において同じ工程で設けられてもよい。 The protective element wiring portion 9 is formed of the same metal material as the positive electrode 3, the negative electrode 4, and the relay wiring portions 8a and 8b, and may be formed of the same metal material or provided in the same process in the manufacturing method. Good.
　また保護素子５は負極４の配線部４ｂに設けられ、保護素子５と保護素子配線部９とがワイヤＷにより、さらに保護素子配線部９と正極３の配線部３ｂとがワイヤＷによりそれぞれ接続されてもよい。さらには、保護素子５が保護素子配線部９上に設けられ、正極３と負極４のそれぞれの配線部３ｂ，４ｂのいずれか一方が保護素子５と接続され、他方が保護素子配線部９と接続されていてもよい。 The protective element 5 is provided in the wiring part 4b of the negative electrode 4, and the protective element 5 and the protective element wiring part 9 are connected by the wire W, and the protective element wiring part 9 and the wiring part 3b of the positive electrode 3 are connected by the wire W, respectively. May be. Furthermore, the protection element 5 is provided on the protection element wiring part 9, and either one of the wiring parts 3 b and 4 b of the positive electrode 3 and the negative electrode 4 is connected to the protection element 5, and the other is connected to the protection element wiring part 9. It may be connected.
　また保護素子配線部９は、配線部４ａ、４ｂ、保護素子５のいずれかとワイヤで接続される領域のみが露出され、他は基板１の内部に配線されていてもよい。図７の場合、正極３の配線部３ｂ上に設けられた保護素子５とワイヤで接続される領域９ａと負極４の配線部４ｂとワイヤで接続される領域９ｂとの保護素子配線部９が露出されていればよい。 Further, the protection element wiring portion 9 may be exposed only in a region connected to any one of the wiring portions 4a and 4b and the protection element 5 with a wire, and the other may be wired inside the substrate 1. In the case of FIG. 7, the protection element wiring portion 9 of the protection element 5 provided on the wiring portion 3b of the positive electrode 3 and a region 9a connected by a wire and the wiring portion 4b of the negative electrode 4 and a region 9b connected by a wire are provided. It only needs to be exposed.
　複数の発光素子２は、図７に示すように、すべての発光素子２が、ｐ電極２Ａが実装領域１ａの一方向である上側を向くように、あるいは、ｎ電極２Ｂが実装領域１ａの他方向である下側を向くように配列されている。実施形態３の発光装置１０４は、発光素子のｐ電極２Ａ（図２参照）が実装領域１ａの右側を向くように配列された領域１１と領域１３と発光素子のｐ電極２Ａ（図２参照）が実装領域１ａの左側を向くように配列された領域１２とが混在するように設けられた形態であった実施形態２の発光装置１０３においての発光素子２の配列に対し、各発光素子２を実装領域１ａ上において９０度回転させた状態で配列されている。複数の発光素子２を直列接続のみならず、並列接続する場合には、実施形態２の発光装置１０３や実施形態１の発光装置１０１のように発光素子２を配列することが好ましいが、発光素子２同士を並列接続しない場合においては、本実施形態３のように発光素子２を配列することができる。ただし、配線部３ｂ，４ｂと中継配線部８ａ，８ｂの間には、１６個の発光素子２のうち、８個ずつの発光素子２が２列にわけて直列接続されており、この２列は並列接続されていることになる。 As shown in FIG. 7, the plurality of light emitting elements 2 are arranged such that all the light emitting elements 2 face the upper side where the p-electrode 2A is one direction of the mounting region 1a, or the n-electrode 2B is other than the mounting region 1a. It is arranged so as to face the lower side which is the direction. The light-emitting device 104 of Embodiment 3 includes a region 11 and a region 13 arranged so that the p-electrode 2A (see FIG. 2) of the light-emitting element faces the right side of the mounting region 1a, and the p-electrode 2A of the light-emitting element (see FIG. 2). Is different from the arrangement of the light emitting elements 2 in the light emitting device 103 of the second embodiment, in which the area 12 arranged so as to face the left side of the mounting area 1a is mixed. They are arranged in a state rotated 90 degrees on the mounting area 1a. When the plurality of light emitting elements 2 are connected not only in series but also in parallel, the light emitting elements 2 are preferably arranged as in the light emitting device 103 of the second embodiment and the light emitting device 101 of the first embodiment. When the two are not connected in parallel, the light emitting elements 2 can be arranged as in the third embodiment. However, among the 16 light emitting elements 2, eight light emitting elements 2 are connected in series in two rows between the wiring portions 3b and 4b and the relay wiring portions 8a and 8b. Are connected in parallel.
［第５実施形態］
　第５実施形態に係る発光装置１０５について、図８を参照しながら詳細に説明する。発光装置１０５は、図８に示すように、実装領域１ａの形状、配線部３ｂ，４ｂの形状、中継配線部８の形状以外は、前記した第１実施形態に係る発光装置１０１とほぼ同様の構成を備えている。従って、前記した発光装置１０１と重複する構成については、同じ符号を付して説明を省略する。また、発光装置１０５は、前記した発光装置１０１と、発光素子の構成（図３）が同じであるため、これらについても説明を省略する。 [Fifth Embodiment]
The light emitting device 105 according to the fifth embodiment will be described in detail with reference to FIG. As shown in FIG. 8, the light emitting device 105 is substantially the same as the light emitting device 101 according to the first embodiment except for the shape of the mounting region 1a, the shapes of the wiring portions 3b and 4b, and the shape of the relay wiring portion 8. It has a configuration. Therefore, the same components as those of the light emitting device 101 described above are denoted by the same reference numerals and description thereof is omitted. The light emitting device 105 has the same configuration of the light emitting element (FIG. 3) as that of the light emitting device 101 described above, and thus description thereof is also omitted.
　発光装置１０５は、発光装置１０１では略矩形状に形成された実装領域１ａが、図８に示すように、円形状に形成されている。この円形状の実装領域１ａには、図８に示すように、複数の発光素子２が縦方向および横方向にそれぞれ等間隔で配列されている。また、複数の発光素子２は、図８に示すように、ここでは、縦方向に最大で１０個、最小で３個配置されるとともに、横方向に最大で１４個、最小で６個配置され、合計１１０個配置されている。また、正極３および負極４の配線部３ｂ，４ｂと、図８に示すように、当該円形状の実装領域の周囲に沿って形成され、それぞれの一端部が互いに隣り合うように形成されている。また、中継配線部８も、図８に示すように、円形状の実装領域の周囲に沿って形成されている。したがって、発光素子２は、中継配線部８の中央（ここでは中央線ＣＬ１）を境として発光素子２のｐ電極とｎ電極の向きが反転して状態で整列している。 In the light emitting device 105, the mounting region 1a formed in a substantially rectangular shape in the light emitting device 101 is formed in a circular shape as shown in FIG. In the circular mounting region 1a, as shown in FIG. 8, a plurality of light emitting elements 2 are arranged at equal intervals in the vertical direction and the horizontal direction, respectively. In addition, as shown in FIG. 8, the plurality of light emitting elements 2 are arranged in a maximum of 10 and a minimum of 3 in the vertical direction, and a maximum of 14 and a minimum of 6 in the horizontal direction. A total of 110 are arranged. Further, as shown in FIG. 8, the wiring portions 3 b and 4 b of the positive electrode 3 and the negative electrode 4 are formed along the periphery of the circular mounting region, and the respective one end portions are formed adjacent to each other. . Moreover, the relay wiring part 8 is also formed along the circumference | surroundings of a circular mounting area | region, as shown in FIG. Therefore, the light emitting element 2 is aligned in a state where the directions of the p electrode and the n electrode of the light emitting element 2 are reversed with respect to the center of the relay wiring portion 8 (here, the center line CL1).
　光反射樹脂６は、基材１上において発光部２０が形成された実装領域１ａを囲うように円状に形成されている。また、光反射樹脂６は、配線部３ｂ，４ｂの一部、保護素子５およびこれらに接続されるワイヤＷを覆うように形成されている。なお、符号ＡＭはパッド部３ａが正極３であることを示すアノードマーク、符号３０は、実装領域上に形成された金属膜、符号７０は、発光素子２のボンディング位置を認識するための認識マーク、符号８０は発光装置１０５の温度計測ポイントであり、これらもめっき等により形成される。 The light reflecting resin 6 is formed in a circular shape so as to surround the mounting region 1 a where the light emitting portion 20 is formed on the base material 1. Further, the light reflecting resin 6 is formed so as to cover a part of the wiring portions 3b and 4b, the protection element 5 and the wire W connected thereto. In addition, the code | symbol AM is an anode mark which shows that the pad part 3a is the positive electrode 3, the code | symbol 30 is the metal film formed on the mounting area | region, and the code | symbol 70 is the recognition mark for recognizing the bonding position of the light emitting element 2. Reference numeral 80 denotes a temperature measurement point of the light emitting device 105, which is also formed by plating or the like.
　このような構成を備える発光装置１０５は、正極３および負極４の配線部３ｂ，４ｂを円形状の実装領域１ａの周囲に沿って形成し、かつ、中継配線部８を介して中央線ＣＬ１の左右の発光素子２を直列に接続し、配線部３ｂ，４ｂの一端部を隣り合わせて形成することで、発光装置１０５のように複数の発光素子２を基板１上における円形状の実装領域１ａに配置した場合であっても、前記した保護素子５を適切な位置に配置することができる。従って、発光装置１０５は、正負両電極間の電圧がツェナー電圧以上となることを防止することができ、過大な電圧が印加されることによる発光素子２の素子破壊や性能劣化の発生を適切に防止することができる。 In the light emitting device 105 having such a configuration, the wiring portions 3b and 4b of the positive electrode 3 and the negative electrode 4 are formed along the circumference of the circular mounting region 1a, and the center line CL1 is connected via the relay wiring portion 8. The left and right light emitting elements 2 are connected in series, and one end portions of the wiring portions 3b and 4b are formed adjacent to each other, whereby a plurality of light emitting elements 2 are formed in a circular mounting region 1a on the substrate 1 like the light emitting device 105. Even if it is a case where it arrange | positions, the above-mentioned protection element 5 can be arrange | positioned in an appropriate position. Therefore, the light-emitting device 105 can prevent the voltage between the positive and negative electrodes from becoming equal to or higher than the zener voltage, and can appropriately prevent element destruction and performance deterioration of the light-emitting element 2 due to application of an excessive voltage. Can be prevented.
　以上説明した実施形態１～３の発光装置について、実施形態３における発光素子２の配列を実施形態１または２の発光装置に適用することも可能であるし、実施形態１または２における発光素子２の配列を実施形態３の発光装置に適用することも可能である。また実施形態３における保護素子配線部９を実施形態２の発光装置に適用することも可能である。本発明に係る発光装置について、発明を実施するための形態により具体的に説明したが、本発明の趣旨はこれらの記載に限定されるものではなく、特許請求の範囲の記載に基づいて広く解釈されなければならない。また、これらの記載に基づいて種々変更、改変等したものも本発明の趣旨に含まれることはいうまでもない。 Regarding the light emitting devices of Embodiments 1 to 3 described above, the arrangement of the light emitting elements 2 in Embodiment 3 can be applied to the light emitting devices of Embodiment 1 or 2, and the light emitting elements 2 in Embodiment 1 or 2 are applicable. It is also possible to apply this arrangement to the light emitting device of Embodiment 3. Further, the protective element wiring portion 9 in the third embodiment can be applied to the light emitting device of the second embodiment. The light emitting device according to the present invention has been specifically described with reference to the embodiments for carrying out the invention. However, the gist of the present invention is not limited to these descriptions, and is widely interpreted based on the description of the claims. It must be. Needless to say, various changes and modifications based on these descriptions are also included in the spirit of the present invention.
１　　　基板
１ａ　　実装領域
２　　　発光素子
２Ａ　　ｐ電極
２Ａａ　ｐパッド電極
２Ａｂ　延伸導電部
２Ｂ　　ｎ電極
２Ｂａ　ｎパッド電極
２Ｂｂ　延伸導電部
３　　　正極
３ａ　　パッド部
３ｂ　　配線部
４　　　負極
４ａ　　パッド部
４ｂ　　配線部
５　　　保護素子
６　　　光反射樹脂
７　　　封止部材
８　　　中継配線部
９　　　保護素子配線部
２０　　発光部
１０１，１０２，１０３，１０４，１０５　発光装置
ＣＭ　　カソードマーク
Ｖｆ　　順方向降下電圧
Ｗ　　　ワイヤ DESCRIPTION OF SYMBOLS 1 Board | substrate 1a Mounting area | region 2 Light emitting element 2A P electrode 2Aa p pad electrode 2Ab Extending conductive part 2B n electrode 2Ba n pad electrode 2Bb Extending conductive part 3 Positive electrode 3a Pad part 3b Wiring part 4 Negative electrode 4a Pad part 4b Wiring part 5 Protection element 6 Light reflecting resin 7 Sealing member 8 Relay wiring part 9 Protection element wiring part 20 Light emitting part 101, 102, 103, 104, 105 Light emitting device CM Cathode mark Vf Forward voltage drop W Wire

Claims (8)

  1. 　基板と、
    　前記基板上の実装領域に配置された複数の発光素子からなる発光部と、
    　それぞれがパッド部と配線部とを有し、当該配線部を介して前記発光部に電圧を印加する正極および負極と、
    　少なくとも前記配線部を覆うように前記基板上に形成された光反射樹脂と、を備える発光装置であって、
    　前記実装領域の周囲に沿って中継配線部が形成され、
    　前記中継配線部が前記光反射樹脂に覆われていることを特徴とする発光装置。     A substrate,
    A light-emitting portion composed of a plurality of light-emitting elements disposed in a mounting region on the substrate;
    Each having a pad portion and a wiring portion, and a positive electrode and a negative electrode for applying a voltage to the light emitting portion through the wiring portion;
    A light reflecting device formed on the substrate so as to cover at least the wiring portion,
    A relay wiring portion is formed along the periphery of the mounting area,
    The light emitting device, wherein the relay wiring portion is covered with the light reflecting resin.
  2. 　前記複数の発光素子は、一側に形成されたｐ電極と、他側に形成されたｎ電極と、をそれぞれ備え、
    　前記複数の発光素子は、前記中継配線部に対して、前記ｐ電極と接続される発光素子と、前記ｎ電極と接続される発光素子とを含むことを特徴とする請求項１に記載の発光装置。     Each of the plurality of light emitting elements includes a p-electrode formed on one side and an n-electrode formed on the other side,
    2. The light emitting device according to claim 1, wherein the plurality of light emitting elements include a light emitting element connected to the p electrode and a light emitting element connected to the n electrode with respect to the relay wiring portion. apparatus.
  3. 　前記正極の配線部と前記中継配線部との間において、前記ｐ電極が前記実装領域に対して一方向を向くように配列され、
    　前記負極の配線部と前記中継配線部との間において、前記ｐ電極が前記実装領域に対して他方向を向くように配列されたことを特徴とする請求項１または請求項２に記載の発光装置。     Between the positive wiring portion and the relay wiring portion, the p-electrode is arranged to face one direction with respect to the mounting region,
    3. The light emitting device according to claim 1, wherein the p-electrode is arranged between the negative wiring portion and the relay wiring portion so as to face in the other direction with respect to the mounting region. apparatus.
  4. 　前記中継配線部を複数有し、前記複数の発光素子の一部が２つの前記中継配線部の間に配列されてなることを特徴とする請求項１または請求項２に記載の発光装置。 The light emitting device according to claim 1 or 2, wherein a plurality of the relay wiring portions are provided, and a part of the plurality of light emitting elements is arranged between the two relay wiring portions.
  5. 　前記複数の発光素子は、ワイヤによって互いに直列および並列に電気的に接続されていることを特徴とする請求項１から請求項４のいずれか一項に記載の発光装置。 The light emitting device according to any one of claims 1 to 4, wherein the plurality of light emitting elements are electrically connected to each other in series and in parallel by wires.
  6. 　前記反射性樹脂は、前記実装領域の周囲を囲うように形成されたことを特徴とする請求項１から請求項５のいずれか一項に記載の発光装置。 The light emitting device according to any one of claims 1 to 5, wherein the reflective resin is formed so as to surround a periphery of the mounting region.
  7. 　前記実装領域上に金属膜が形成され、当該金属膜を介して前記複数の発光素子が配置されたことを特徴とする請求項１から請求項６のいずれか一項に記載の発光装置。 The light emitting device according to any one of claims 1 to 6, wherein a metal film is formed on the mounting region, and the plurality of light emitting elements are arranged via the metal film.
  8. 　前記光反射樹脂は、前記実装領域の周縁の一部を覆うように形成されたことを特徴とする請求項７に記載の発光装置。 8. The light emitting device according to claim 7, wherein the light reflecting resin is formed so as to cover a part of a peripheral edge of the mounting region.
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