WO2002035901A1 - Apparatus for providing heat dissipation for a circuit element - Google Patents
Apparatus for providing heat dissipation for a circuit element Download PDFInfo
- Publication number
- WO2002035901A1 WO2002035901A1 PCT/US2001/031479 US0131479W WO0235901A1 WO 2002035901 A1 WO2002035901 A1 WO 2002035901A1 US 0131479 W US0131479 W US 0131479W WO 0235901 A1 WO0235901 A1 WO 0235901A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- circuit element
- heatsink
- side walls
- pcb
- coupling member
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
- H05K7/20436—Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing
- H05K7/20445—Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing the coupling element being an additional piece, e.g. thermal standoff
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
- H05K9/002—Casings with localised screening
- H05K9/0022—Casings with localised screening of components mounted on printed circuit boards [PCB]
- H05K9/0024—Shield cases mounted on a PCB, e.g. cans or caps or conformal shields
- H05K9/0032—Shield cases mounted on a PCB, e.g. cans or caps or conformal shields having multiple parts, e.g. frames mating with lids
Definitions
- the invention relates to the cooling of a circuit element, and, more particularly, the invention relates to an apparatus for dissipating heat from a circuit element mounted on a printed circuit board.
- heatsinks dissipate heat away from integrated circuits (ICs) to the surrounding air.
- ICs integrated circuits
- the heatsink is bonded to the top of the IC.
- bond line between the IC and the heatsink must be sufficiently thin to ensure minimal thermal resistance through the bonding material.
- delamination of the heatsink can result if the IC generates too much heat.
- the loose heatsink could come in contact with other circuitry and cause an electrical short, and the now improperly bonded heatsink will not dissipate heat from the IC. Bonding is thus a poor solution when maximal heat dissipation is required.
- the heatsink is mechanically mounted to the printed circuit board (PCB) such that the IC is sandwiched between the heatsink and the PCB.
- the heatsink is mounted by either securing the heatsink to the IC via clips that attach to the underside of the IC package (i.e., piggyback mounting), or mounting the heatsink to the PCB using spring clips or screws.
- Piggyback mounts are typically not used with ICs having a low profile package, such as a quad flat pack (QFP) or a ball grid array (BGA) package, because there is minimal gap between the IC and the PCB for attaching the heatsink.
- a heatsink for dissipating heat from an (Integrated Circuit) IC mounted to the PCB is coupled to a surrounding structure of the PCB.
- the surrounding structure is a RF shield.
- the heatsink comprises a connector for thermal contact with an IC, and a pair of arms for dissipating heat and for coupling the heatsink to the surrounding structure without contacting the PCB. If the ICs have electrically conductive packages, non-electrically conductive thermal spacers are inserted between the connector and the corresponding IC to electrically isolate the heatsink from the IC. Additionally, each arm has a tip extending perpendicularly therefrom, substantially increasing the surface area thereof for increased heat dissipation and for structural stability.
- the heatsink is mounted to the surrounding structure using bumps attached to the tips of each arm. Holes in the surrounding structure accept the bumps attached to the tips of each arm.
- the heatsink is coupled to slots or holes in the surrounding structure via rivets, pin plugs, pegs or screws on the tips of the arms of the heatsink. Because the heatsink does not come into contact with the PCB, the PCB can be made smaller and trace routing is maximized.
- FIG. 1 illustrates an embodiment of a heatsink according to the present invention
- FIG. 2 depicts the right tip portion of the heat sink of FIG. 1;
- FIG. 3 depicts an isometric view of a circuit element mounted to a printed circuit board;
- FIG. 4 depicts the heatsink coupled to a structure and in thermal contact with a circuit element.
- FIG. 1 illustrates an embodiment of a heatsink 10 according to the present invention.
- the heatsink 10 comprises a rectangular left arm 20, a rectangular connecting member 12, and a rectangular right arm 24.
- connecting member 12, left arm 20 and right arm 24 may also be formed using non-rectangular shapes.
- FIG. 1 it will be appreciated that while the heatsink 10 of FIG. 1 is described primarily in rectangular and other specific shapes, various modifications to such shapes are contemplated by the inventor and within the scope of the present invention.
- Rectangular connecting member 12 includes side walls 14, an open top 16 and an opposing open bottom 18. Extending perpendicularly from one of said side walls 14 is a left arm 20. A left tip 22 extends perpendicularly from substantially the majority of the width of the left arm 20. Extending perpendicularly from one of said side walls 14 opposite the left arm 20 is a right arm 24. A right tip 26
- FIG. 2 extends perpendicularly from and substantially the majority of the width of right arm 24. Together left arm 20 and right arm 24 comprise a pair of arms
- each tip On the outer surface of each tip is a plurality of bumps 28 and on each side wall is a plurality of holes 32.
- Heatsink 10 is made out of a thermally conductive material such as aluminum. Important bends of heatsink 10 include gussets 30, which provide mechanical strength to avoid deformation and have adequate bend radii so as not to restrict the conductive flow of heat through the metal.
- Connecting member 12 is designed to mechanically mate with the desired circuit element using an interference or compression fit, whereby adequate pressure can be applied to ensure heat transfer from the circuit element to heatsink 10. That is, the interference fit provides mechanical support and low thermal resistance by ensuring a minimum "contact patch" between the heatsink
- Heat sink 10 10 and a circuit element producing a great amount of heat dispersion.
- connecting member 12 sits on top of the circuit element.
- Heat is drawn from the circuit element into side walls 14 and dispersed to pair of arms 34 and to the air, for example, via open top 16 and open bottom 18.
- Connecting member 12 can be in direct contact with a circuit element having a non-electrically conductive package (e.g., ceramic package), or if the circuit element has a metal package, can be thermally coupled to the circuit element with conductive spacers that are electrical insulators.
- a non-electrically conductive package e.g., ceramic package
- a metal package e.g., aluminum
- heatsink 10 of FIG. 1 is made of aluminum, it is understood by those skilled in the art that heatsink 10 can be made of any thermally conductive material (e.g. metal, metal composite, polymer).
- FIG. 3 depicts an isometric view of a circuit element 36 mounted to a printed circuit board (PCB) 38.
- PCB printed circuit board
- the circuit element 36 comprises, illustratively, an integrated circuit (IC) encapsulated within a package 40 that has a substantially planar top surface 42 and opposing bottom surface 44, such as a quad flat pack (QFP) or ball grid array (BGA) package.
- IC integrated circuit
- QFP quad flat pack
- BGA ball grid array
- Leads 46 are connected to the IC within the package 40 and extend outward for attachment to PCB 38. While the present invention has been illustrated for enhanced cooling of a packaged IC, it will be appreciated that the inventive principles can be utilized with any heat generating circuit element. Such element does not necessarily require a planar surface, since a conductive compound can be utilized to ensure good surface contact on non-planar surfaces.
- FIG. 4 depicts an assembly including a heatsink according to the present invention. Specifically, FIG. 4 depicts an isometric view of an structure or module comprising a heatsink formed according to the present invention cooperating with an structure 48 to contain a PCB 38 including integrated circuits thermally cooperating with the heatsink. The heatsink mechanically cooperates with the structure 48 and the PCB 38 to form a compression fit such that a path of low thermal resistance is formed between the heatsink and integrated circuits on the PC board to be cooled.
- the structure 48 comprises side walls perpendicularly oriented with respect to the edges of the PCB 38. Other shapes (e.g., round, oval, etc.) and orientations including portions or the entirety of the PCB 38 are also within the scope of the present invention.
- FIG. 4 depicts the heatsink 10 of the present invention coupled to structure 48 surrounding the PCB 38.
- Structure 48 comprises a side wall 50 on each side of the PCB 38.
- Each of the side walls 50 includes a top edge 52 and a bottom edge 54, where the bottom edge 54 of each of the side walls 50 includes downwardly extending plurality of solder tabs 56.
- the plurality of solder tabs 56 are used to attach structure 48 to the PCB 38.
- Other devices for connecting the structure 48 to the PCB 38 are also within the scope of the invention.
- each side walls 50 Dispersed throughout each side walls 50 are a plurality of holes 32. Other types of perforations (i.e. slots and the like) may be used.
- Structure 48 is any surrounding structure of PCB 38, for example, an RF shield or chassis.
- the pair of arms 34 of heatsink 10 is depicted as being attached to the structure 48 via the bumps 28 and holes 32 of the respective devices.
- heatsink 10 and structure 48 are depicted as having bumps 28 and holes 32 respectively, other methods of attachment may be used, for example, slots, rivets, pins, plugs, pegs, screws or combinations thereof.
- heatsink 10 is depicted as being removable from structure 48 but it can also be permanently locked into place.
- Pair of arms 34 also provide a large surface area for dissipating heat away from circuit element 36 when an electronic component 36 is in thermal contact with connecting member 12.
- thermally conductive spacers that are electrical insulators can be used with the present invention. The spacers can be used for example when electronic component 36 has a metal structure that is not electrically isolated. Additionally, thermally conductive spacers can also be used where there is an insufficient amount of interference between the heatsink and the electronic component.
- the present invention provides for enhanced cooling of a conventional electronic component by making available, on the top surface of the component, an additional surface for heat dissipation.
- heat is dissipated from the electronic component to the surrounding air. This is accomplished without requiring the design of customized components
Abstract
An arrangement for dissipating heat from a circuit element attached to a printed circuit board, comprising: a heatsink having a pair of arms, each one of the arms having tips including bumps, and a structure coupled to the printed circuit board on at least two sides. The structure has holes structured and arranged to allow each of the bumps on the tips of the arms to fit into the holes of the structure.
Description
APPARATUS FOR PROVIDING HEAT DISSIPATION FOR A CIRCUIT
ELEMENT
FIELD OF THE INVENTION The invention relates to the cooling of a circuit element, and, more particularly, the invention relates to an apparatus for dissipating heat from a circuit element mounted on a printed circuit board.
BACKGROUND OF THE DISCLOSURE In general, heatsinks dissipate heat away from integrated circuits (ICs) to the surrounding air. Presently, there are two main approaches to installing such heatsinks. In the first approach, the heatsink is bonded to the top of the IC. In bonding, the bond line between the IC and the heatsink must be sufficiently thin to ensure minimal thermal resistance through the bonding material. Unfortunately, delamination of the heatsink can result if the IC generates too much heat. The loose heatsink could come in contact with other circuitry and cause an electrical short, and the now improperly bonded heatsink will not dissipate heat from the IC. Bonding is thus a poor solution when maximal heat dissipation is required. In the second approach, the heatsink is mechanically mounted to the printed circuit board (PCB) such that the IC is sandwiched between the heatsink and the PCB. Specifically, the heatsink is mounted by either securing the heatsink to the IC via clips that attach to the underside of the IC package (i.e., piggyback mounting), or mounting the heatsink to the PCB using spring clips or screws. Piggyback mounts are typically not used with ICs having a low profile package, such as a quad flat pack (QFP) or a ball grid array (BGA) package, because there is minimal gap between the IC and the PCB for attaching the heatsink. Attaching the heatsink to the PCB using spring clips or screws
requires isolating the mounting area from the traces of the PCB thereby reducing the available space for circuit routing. As such, knowledge of heatsink placement is required before design and sometimes results in enlargement of the PCB to accommodate the heatsink. Therefore, a need exists in the art for a heatsink arrangement that provides maximum heat dissipation without being bonded to the IC or being mounted to the PCB or the under edge of the IC package.
SUMMARY OF THE INVENTION The disadvantages associated with the prior art are overcome by an apparatus for dissipating heat from a circuit element mounted to a PCB. In an embodiment of the invention, a heatsink for dissipating heat from an (Integrated Circuit) IC mounted to the PCB is coupled to a surrounding structure of the PCB. The surrounding structure is a RF shield. The heatsink comprises a connector for thermal contact with an IC, and a pair of arms for dissipating heat and for coupling the heatsink to the surrounding structure without contacting the PCB. If the ICs have electrically conductive packages, non-electrically conductive thermal spacers are inserted between the connector and the corresponding IC to electrically isolate the heatsink from the IC. Additionally, each arm has a tip extending perpendicularly therefrom, substantially increasing the surface area thereof for increased heat dissipation and for structural stability.
The heatsink is mounted to the surrounding structure using bumps attached to the tips of each arm. Holes in the surrounding structure accept the bumps attached to the tips of each arm. In alternative embodiments of the invention, the heatsink is coupled to slots or holes in the surrounding structure via rivets, pin plugs, pegs or screws on the tips of the arms of the heatsink. Because the heatsink does not come into contact with the PCB, the PCB can be made smaller and trace routing is maximized.
Further embodiments of the present invention will become apparent from the detailed description contained hereinafter. It should be understood, however, that the detailed description and specific examples are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.
BRIEF DESCRIPTION OF THE DRAWINGS The teachings of the present invention can be readily understood by considering the following detailed description in conjunction with the accompanying drawings, in which:
FIG. 1 illustrates an embodiment of a heatsink according to the present invention;
FIG. 2 depicts the right tip portion of the heat sink of FIG. 1; FIG. 3 depicts an isometric view of a circuit element mounted to a printed circuit board; and
FIG. 4 depicts the heatsink coupled to a structure and in thermal contact with a circuit element.
To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the figures.
DETAILED DESCRIPTION FIG. 1 illustrates an embodiment of a heatsink 10 according to the present invention. Specifically, the heatsink 10 comprises a rectangular left arm 20, a rectangular connecting member 12, and a rectangular right arm 24. It will be appreciated by those skilled in the art that connecting member 12, left arm 20 and right arm 24 may also be formed using non-rectangular shapes. Moreover, it will be appreciated that while the heatsink 10 of FIG. 1 is described primarily in
rectangular and other specific shapes, various modifications to such shapes are contemplated by the inventor and within the scope of the present invention.
Rectangular connecting member 12 includes side walls 14, an open top 16 and an opposing open bottom 18. Extending perpendicularly from one of said side walls 14 is a left arm 20. A left tip 22 extends perpendicularly from substantially the majority of the width of the left arm 20. Extending perpendicularly from one of said side walls 14 opposite the left arm 20 is a right arm 24. A right tip 26
(FIG. 2) extends perpendicularly from and substantially the majority of the width of right arm 24. Together left arm 20 and right arm 24 comprise a pair of arms
34. On the outer surface of each tip is a plurality of bumps 28 and on each side wall is a plurality of holes 32.
Heatsink 10 is made out of a thermally conductive material such as aluminum. Important bends of heatsink 10 include gussets 30, which provide mechanical strength to avoid deformation and have adequate bend radii so as not to restrict the conductive flow of heat through the metal.
Connecting member 12 is designed to mechanically mate with the desired circuit element using an interference or compression fit, whereby adequate pressure can be applied to ensure heat transfer from the circuit element to heatsink 10. That is, the interference fit provides mechanical support and low thermal resistance by ensuring a minimum "contact patch" between the heatsink
10 and a circuit element producing a great amount of heat dispersion. Heat sink
10 is designed so that connecting member 12 sits on top of the circuit element.
Heat is drawn from the circuit element into side walls 14 and dispersed to pair of arms 34 and to the air, for example, via open top 16 and open bottom 18.
Connecting member 12 can be in direct contact with a circuit element having a non-electrically conductive package (e.g., ceramic package), or if the circuit element has a metal package, can be thermally coupled to the circuit
element with conductive spacers that are electrical insulators. Although the heatsink 10 of FIG. 1 is made of aluminum, it is understood by those skilled in the art that heatsink 10 can be made of any thermally conductive material (e.g. metal, metal composite, polymer). FIG. 3 depicts an isometric view of a circuit element 36 mounted to a printed circuit board (PCB) 38. The circuit element 36 comprises, illustratively, an integrated circuit (IC) encapsulated within a package 40 that has a substantially planar top surface 42 and opposing bottom surface 44, such as a quad flat pack (QFP) or ball grid array (BGA) package. Leads 46 are connected to the IC within the package 40 and extend outward for attachment to PCB 38. While the present invention has been illustrated for enhanced cooling of a packaged IC, it will be appreciated that the inventive principles can be utilized with any heat generating circuit element. Such element does not necessarily require a planar surface, since a conductive compound can be utilized to ensure good surface contact on non-planar surfaces. Further, while conventional leads 46 have been illustrated for mounting the circuit element 36 to the PCB 38, it will be appreciated by those skilled in the art that the invention can be practiced with circuit elements having other types of connection elements, such as ball grid solder bumps. FIG. 4 depicts an assembly including a heatsink according to the present invention. Specifically, FIG. 4 depicts an isometric view of an structure or module comprising a heatsink formed according to the present invention cooperating with an structure 48 to contain a PCB 38 including integrated circuits thermally cooperating with the heatsink. The heatsink mechanically cooperates with the structure 48 and the PCB 38 to form a compression fit such that a path of low thermal resistance is formed between the heatsink and integrated circuits on the PC board to be cooled.
The structure 48 comprises side walls perpendicularly oriented with respect to the edges of the PCB 38. Other shapes (e.g., round, oval, etc.) and orientations including portions or the entirety of the PCB 38 are also within the scope of the present invention. FIG. 4 depicts the heatsink 10 of the present invention coupled to structure 48 surrounding the PCB 38. Structure 48 comprises a side wall 50 on each side of the PCB 38. Each of the side walls 50 includes a top edge 52 and a bottom edge 54, where the bottom edge 54 of each of the side walls 50 includes downwardly extending plurality of solder tabs 56. The plurality of solder tabs 56 are used to attach structure 48 to the PCB 38. Other devices for connecting the structure 48 to the PCB 38 are also within the scope of the invention. Dispersed throughout each side walls 50 are a plurality of holes 32. Other types of perforations (i.e. slots and the like) may be used. Structure 48 is any surrounding structure of PCB 38, for example, an RF shield or chassis. In this illustrative embodiment, the pair of arms 34 of heatsink 10 is depicted as being attached to the structure 48 via the bumps 28 and holes 32 of the respective devices. Although heatsink 10 and structure 48 are depicted as having bumps 28 and holes 32 respectively, other methods of attachment may be used, for example, slots, rivets, pins, plugs, pegs, screws or combinations thereof. Additionally, heatsink 10 is depicted as being removable from structure 48 but it can also be permanently locked into place.
Pair of arms 34 also provide a large surface area for dissipating heat away from circuit element 36 when an electronic component 36 is in thermal contact with connecting member 12. Although it is not depicted, thermally conductive spacers that are electrical insulators can be used with the present invention. The spacers can be used for example when electronic component 36 has a metal structure that is not electrically isolated. Additionally, thermally conductive
spacers can also be used where there is an insufficient amount of interference between the heatsink and the electronic component.
Thus, as described, the present invention provides for enhanced cooling of a conventional electronic component by making available, on the top surface of the component, an additional surface for heat dissipation. By utilizing an arrangement whereby the present invention is coupled to a chassis structure, heat is dissipated from the electronic component to the surrounding air. This is accomplished without requiring the design of customized components
Although various embodiments which incorporate the teachings of the present invention have been shown and described in detail herein, those skilled in the art can readily devise many other varied embodiments that still incorporate these teachings.
Claims
1. An apparatus for dissipating heat from a circuit element attached to a printed circuit board (PCB) secured to a chassis, said apparatus comprising: a heatsink having arms extending from a connector member including tips attached to said arms, said heatsink mechanically and thermally cooperating with said circuit element; and a coupling member attached to said tips, for securing said heatsink to opposing side walls of said chassis.
2. The apparatus of claim 1, wherein said coupling member is selected from the group consisting of a bump, rivet, pin, plug, peg, and screw.
3. The apparatus of claim 1 wherein said side walls of said chassis having holes dispersed through out said side walls for interlocking with said coupling member.
4. The apparatus of claim 1, wherein said connector member of said heat sink is in thermal contact with a respective circuit element.
5. The apparatus of claim 1 wherein a thermal spacer is coupled to said connector member and said respective circuit element.
6. The apparatus of claim 1 wherein said structure comprises a radio frequency (RF) shield.
7. The apparatus of claim 1 wherein said circuit element comprises one of a quad flat pack (QFP) and ball grid array (BGA) package.
8. The apparatus of claim 1 wherein said circuit element comprises a conductive package, said circuit element mechanically and thermally cooperating with said heatsink via an electrical insulator disposed there between.
9. An apparatus for dissipating heat from a circuit element attached to a printed circuit board (PCB) secured to a structure, said apparatus comprising: a heatsink having arms extending from a connector member including tips attached to said arms, said heatsink mechanically and thermally cooperating with said circuit element; and a coupling member attached to said tips, for securing said heatsink to said structure.
10. The apparatus of claim 9, wherein said connector member of said heat sink is in thermal contact with a respective circuit element.
11. The apparatus of claim 9 wherein a thermal spacer is coupled to said connector member and said respective circuit element.
12. The apparatus of claim 9, wherein said coupling member is selected from the group consisting of a bump, rivet, pin, plug, peg, and screw.
13. The apparatus of claim 9 wherein said structure includes side walls having holes dispersed through out said side walls for interlocking with said coupling member.
14. The apparatus of claim 9 wherein said structure comprises a radio frequency (RF) shield.
15. The apparatus of claim 9 wherein said circuit element comprises one of a quad flat pack (QFP) and ball grid array (BGA) package.
16. The apparatus of claim 9 wherein said circuit element comprises a conductive package, said circuit element mechanically and thermally cooperating with said heatsink via an electrical insulator disposed there between.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2002211534A AU2002211534A1 (en) | 2000-10-27 | 2001-10-10 | Apparatus for providing heat dissipation for a circuit element |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/698,738 | 2000-10-27 | ||
US09/698,738 US6545871B1 (en) | 2000-10-27 | 2000-10-27 | Apparatus for providing heat dissipation for a circuit element |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002035901A1 true WO2002035901A1 (en) | 2002-05-02 |
Family
ID=24806463
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2001/031479 WO2002035901A1 (en) | 2000-10-27 | 2001-10-10 | Apparatus for providing heat dissipation for a circuit element |
Country Status (3)
Country | Link |
---|---|
US (1) | US6545871B1 (en) |
AU (1) | AU2002211534A1 (en) |
WO (1) | WO2002035901A1 (en) |
Families Citing this family (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW530995U (en) * | 2002-02-05 | 2003-05-01 | Wen-Chen Wei | Heat sink base pad |
US6728104B1 (en) * | 2002-10-23 | 2004-04-27 | Cisco Technology, Inc. | Methods and apparatus for cooling a circuit board component |
TW549573U (en) * | 2002-11-27 | 2003-08-21 | Via Tech Inc | IC package for a multi-chip module |
US6707675B1 (en) * | 2002-12-18 | 2004-03-16 | Hewlett-Packard Development Company, L.P. | EMI containment device and method |
US6914780B1 (en) | 2003-01-16 | 2005-07-05 | Cisco Technology, Inc. | Methods and apparatus for cooling a circuit board component using a heat pipe assembly |
TW556475B (en) * | 2003-02-19 | 2003-10-01 | Accton Technology Corp | A cover apparatus for dissipating heat and shielding electromagnetic interference |
KR100982257B1 (en) | 2003-08-11 | 2010-09-15 | 엘지전자 주식회사 | Memory heat-radiation structure for portable computer |
US7180745B2 (en) * | 2003-10-10 | 2007-02-20 | Delphi Technologies, Inc. | Flip chip heat sink package and method |
TWI316387B (en) * | 2003-12-30 | 2009-10-21 | Asustek Comp Inc | Electronic apparatus and shielding module thereof |
US7113406B1 (en) * | 2004-07-22 | 2006-09-26 | Cisco Technology, Inc. | Methods and apparatus for fastening a set of heatsinks to a circuit board |
TWI247574B (en) * | 2004-11-30 | 2006-01-11 | Silicon Integrated Sys Corp | Heat dissipation mechanism for electronic device |
JP4498163B2 (en) * | 2005-02-08 | 2010-07-07 | 株式会社東芝 | Heat dissipation device for electronic equipment |
JP2006222388A (en) * | 2005-02-14 | 2006-08-24 | Toshiba Corp | Heat dissipation device and heat dissipation method of electronic apparatus |
JP2006229046A (en) * | 2005-02-18 | 2006-08-31 | Toshiba Corp | Heat radiator and heat radiating method for electronic apparatus |
JP4445409B2 (en) * | 2005-02-23 | 2010-04-07 | 株式会社東芝 | Heat dissipation device for electronic equipment |
JP2007012941A (en) * | 2005-06-30 | 2007-01-18 | Toshiba Corp | Electronic apparatus and heat sink built therein |
US7272006B2 (en) * | 2005-09-30 | 2007-09-18 | Intel Corporation | IC coolant microchannel assembly with integrated attachment hardware |
US7317618B2 (en) * | 2006-03-09 | 2008-01-08 | Laird Technologies, Inc. | Combined board level shielding and thermal management |
US7733659B2 (en) * | 2006-08-18 | 2010-06-08 | Delphi Technologies, Inc. | Lightweight audio system for automotive applications and method |
US9237685B2 (en) | 2006-08-18 | 2016-01-12 | Delphi Technologies, Inc. | Lightweight audio system for automotive applications and method |
EP2401178B1 (en) | 2009-02-27 | 2016-11-16 | Delphi Technologies, Inc. | Lightweight audio system for automotive applications and method |
DE102011085870A1 (en) * | 2011-11-07 | 2013-05-08 | Lenze Automation Gmbh | frequency converter |
CN106922101B (en) * | 2015-12-24 | 2018-12-21 | 宏达国际电子股份有限公司 | Electronic device |
CN108605420B (en) * | 2016-02-18 | 2020-08-25 | 株式会社自动网络技术研究所 | Electrical connection box |
TWI652982B (en) * | 2017-12-22 | 2019-03-01 | 啓碁科技股份有限公司 | Shielding structure |
KR102476599B1 (en) * | 2018-02-21 | 2022-12-12 | 삼성전자주식회사 | Electronic device with shielding can structure |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998008363A1 (en) * | 1996-08-23 | 1998-02-26 | Giat Industries | Method for manufacturing a device for burning off thermal energy produced by electronic components embedded in a printed circuit card, and resulting device |
US5991155A (en) * | 1996-12-13 | 1999-11-23 | Mitsubishi Denki Kabushiki Kaisha | Heat sink assembly including flexible heat spreader sheet |
US6097600A (en) * | 1998-01-23 | 2000-08-01 | Alps Electric Co., Ltd. | Electric device |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5060114A (en) * | 1990-06-06 | 1991-10-22 | Zenith Electronics Corporation | Conformable pad with thermally conductive additive for heat dissipation |
US5590026A (en) * | 1995-07-31 | 1996-12-31 | Borg-Warner Automotive, Inc. | Apparatus for dissipating heat from an integrated circuit |
JP3969772B2 (en) * | 1996-10-31 | 2007-09-05 | 富士通株式会社 | Microchip module unit |
JPH11289142A (en) * | 1998-04-01 | 1999-10-19 | Toshiba Corp | Circuit module mounting structure and electronic apparatus incorporating it |
JP3619670B2 (en) * | 1998-05-27 | 2005-02-09 | アルプス電気株式会社 | Electronics |
US6239972B1 (en) * | 1999-12-13 | 2001-05-29 | Honeywell International Inc. | Integrated convection and conduction heat sink for multiple mounting positions |
-
2000
- 2000-10-27 US US09/698,738 patent/US6545871B1/en not_active Expired - Lifetime
-
2001
- 2001-10-10 AU AU2002211534A patent/AU2002211534A1/en not_active Withdrawn
- 2001-10-10 WO PCT/US2001/031479 patent/WO2002035901A1/en not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998008363A1 (en) * | 1996-08-23 | 1998-02-26 | Giat Industries | Method for manufacturing a device for burning off thermal energy produced by electronic components embedded in a printed circuit card, and resulting device |
US5991155A (en) * | 1996-12-13 | 1999-11-23 | Mitsubishi Denki Kabushiki Kaisha | Heat sink assembly including flexible heat spreader sheet |
US6097600A (en) * | 1998-01-23 | 2000-08-01 | Alps Electric Co., Ltd. | Electric device |
Also Published As
Publication number | Publication date |
---|---|
US6545871B1 (en) | 2003-04-08 |
AU2002211534A1 (en) | 2002-05-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6545871B1 (en) | Apparatus for providing heat dissipation for a circuit element | |
US6947286B2 (en) | Stack up assembly | |
JP5160434B2 (en) | Method and apparatus for grounding a heat sink in thermal contact with an electronic component using a ground spring having multi-junction spring fingers | |
US5513070A (en) | Dissipation of heat through keyboard using a heat pipe | |
US5589711A (en) | Semiconductor package | |
US6212070B1 (en) | Zero force heat sink | |
US5590026A (en) | Apparatus for dissipating heat from an integrated circuit | |
KR101048609B1 (en) | Power semiconductor module, semiconductor assembly and power semiconductor housing assembly method | |
US5969949A (en) | Interfitting heat sink and heat spreader slug | |
EP1323340B1 (en) | System and method for connecting a power converter to a land grid array socket | |
US20090027859A1 (en) | Surface mounted heat sink and electromagnetic shield | |
JPH08222671A (en) | Cooler for circuit module | |
US6392887B1 (en) | PLGA-BGA socket using elastomer connectors | |
KR0126781Y1 (en) | Radiation apparatus for semiconductor element | |
US7280360B2 (en) | Socket adapted for compressive loading | |
JP2021005581A (en) | Electronic control device | |
US6829144B1 (en) | Flip chip package with heat spreader allowing multiple heat sink attachment | |
KR20020015276A (en) | Apparatus for providing heat dissipation for a circuit element | |
JPH0810230Y2 (en) | Mounting structure for electrical parts and radiator | |
CA2221502C (en) | Semiconductor package | |
JP2000323875A (en) | Equipment and method for cooling electronic component |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
WA | Withdrawal of international application | ||
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |