DE10262121B4 - Semiconducting component with increased breakdown voltage in edge region has shorter distance from edge cell trench to that of adjacent cell than between trenches of cells in cell field - Google Patents
Semiconducting component with increased breakdown voltage in edge region has shorter distance from edge cell trench to that of adjacent cell than between trenches of cells in cell field Download PDFInfo
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- DE10262121B4 DE10262121B4 DE10262121A DE10262121A DE10262121B4 DE 10262121 B4 DE10262121 B4 DE 10262121B4 DE 10262121 A DE10262121 A DE 10262121A DE 10262121 A DE10262121 A DE 10262121A DE 10262121 B4 DE10262121 B4 DE 10262121B4
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- cell
- zone
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- 230000015556 catabolic process Effects 0.000 title description 10
- 239000004065 semiconductor Substances 0.000 claims description 53
- 230000000295 complement effect Effects 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 abstract 2
- 238000000576 coating method Methods 0.000 abstract 2
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 239000002019 doping agent Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 229920005591 polysilicon Polymers 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 210000000746 body region Anatomy 0.000 description 1
- 239000002800 charge carrier Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/7801—DMOS transistors, i.e. MISFETs with a channel accommodating body or base region adjoining a drain drift region
- H01L29/7802—Vertical DMOS transistors, i.e. VDMOS transistors
- H01L29/7813—Vertical DMOS transistors, i.e. VDMOS transistors with trench gate electrode, e.g. UMOS transistors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/423—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
- H01L29/42312—Gate electrodes for field effect devices
- H01L29/42316—Gate electrodes for field effect devices for field-effect transistors
- H01L29/4232—Gate electrodes for field effect devices for field-effect transistors with insulated gate
- H01L29/42356—Disposition, e.g. buried gate electrode
- H01L29/4236—Disposition, e.g. buried gate electrode within a trench, e.g. trench gate electrode, groove gate electrode
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/7801—DMOS transistors, i.e. MISFETs with a channel accommodating body or base region adjoining a drain drift region
- H01L29/7802—Vertical DMOS transistors, i.e. VDMOS transistors
- H01L29/7803—Vertical DMOS transistors, i.e. VDMOS transistors structurally associated with at least one other device
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/7801—DMOS transistors, i.e. MISFETs with a channel accommodating body or base region adjoining a drain drift region
- H01L29/7802—Vertical DMOS transistors, i.e. VDMOS transistors
- H01L29/7811—Vertical DMOS transistors, i.e. VDMOS transistors with an edge termination structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/06—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions
- H01L29/0684—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by the shape, relative sizes or dispositions of the semiconductor regions or junctions between the regions
- H01L29/0692—Surface layout
- H01L29/0696—Surface layout of cellular field-effect devices, e.g. multicellular DMOS transistors or IGBTs
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/402—Field plates
- H01L29/407—Recessed field plates, e.g. trench field plates, buried field plates
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/423—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
- H01L29/42312—Gate electrodes for field effect devices
- H01L29/42316—Gate electrodes for field effect devices for field-effect transistors
- H01L29/4232—Gate electrodes for field effect devices for field-effect transistors with insulated gate
- H01L29/42364—Gate electrodes for field effect devices for field-effect transistors with insulated gate characterised by the insulating layer, e.g. thickness or uniformity
- H01L29/42368—Gate electrodes for field effect devices for field-effect transistors with insulated gate characterised by the insulating layer, e.g. thickness or uniformity the thickness being non-uniform
Abstract
Description
Die vorliegende Erfindung betrifft ein Halbleiterbauelement gemäß den Merkmalen des Oberbegriffs des Anspruchs 1.The present invention relates to a semiconductor device according to the features of the preamble of
Derartige Bauelemente werden auch als Graben-Transistoren oder Trench-Transistoren bezeichnet.Such devices are also referred to as trench transistors or trench transistors.
Grundlegende Aspekte zu Trench-Transistoren sind in der
Ein Trench-Transistor mit Randzelle ist in der
Aufgabe der vorliegenden Erfindung ist es, ein Halbleiterbauelement mit einer Vielzahl von gleichartig aufgebauten, in einem Zellenfeld angeordneten Transistorzellen und mit einem lateralen Niedervoltbauelement in dem Zellenfeld zur Verfügung zu stellen.Object of the present invention is to provide a semiconductor device with a plurality of identically constructed, arranged in a cell array transistor cells and with a lateral low-voltage device in the cell array available.
Dieses Aufgabe wird durch ein Halbleiterbauelement gemäß den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.This object is achieved by a semiconductor component according to the features of
Das erfindungsgemäße Halbleiterbauelement umfasst ein Zellenfeld mit mehreren gleichartig aufgebauten Transistorzellen, die in einem Halbleiterkörper ausgebildet sind. Jede Transistorzelle umfasst eine erste Anschlusszone eines ersten Leitungstyps im Bereich einer Vorderseite des Halbleiterkörpers, eine zweite Anschlusszone eines ersten Leitungstyps im Bereich einer Rückseite des Halbleiterkörpers, eine Kanalzone eines zweiten Leitungstyps, die zwischen der ersten Anschlusszone und der zweiten Anschlusszone angeordnet ist, und eine Steuerelektrode, die in einem Graben, der sich in vertikaler Richtung in den Halbleiterkörper hinein erstreckt, benachbart zu der Kanalzone angeordnet ist und die mittels einer Isolationsschicht gegenüber dem Halbleiterkörper isoliert ist. Die Gräben der einzelnen Zellen sind in horizontaler Richtung des Halbleiterkörpers beabstandet zueinander angeordnet.The semiconductor component according to the invention comprises a cell array with a plurality of identically constructed transistor cells, which are formed in a semiconductor body. Each transistor cell comprises a first connection zone of a first conductivity type in the region of a front side of the semiconductor body, a second connection zone of a first conductivity type in the region of a rear side of the semiconductor body, a channel region of a second conductivity type, which is arranged between the first connection zone and the second connection zone, and a control electrode which is arranged in a trench which extends in a vertical direction into the semiconductor body, adjacent to the channel zone and which is insulated by means of an insulating layer with respect to the semiconductor body. The trenches of the individual cells are arranged spaced apart in the horizontal direction of the semiconductor body.
Die erste Anschlusszone wird bei MOS-Transistoren als Drain Zone, die zweite Anschlusszone als Source-Zone, die Kanalzone als Body-Zone und die Steuerelektrode als Gate-Elektrode bezeichnet.In the case of MOS transistors, the first connection zone is referred to as the drain zone, the second connection zone as the source zone, the channel zone as the body zone, and the control electrode as the gate electrode.
Es ist vorgesehen, in dem Zellenfeld einen Bereich zur Herstellung integrierter Niedervoltbauelemente die ihre Anschlüsse im Bereich der Vorderseite des Halbleiterkörpers haben, vorzusehen, wobei die Durchbruchsspannung in diesem Bereich nicht geringer sein darf als die Durchbruchspannung der Transistorzellen. Hierzu ist der Abstand wenigstens zweier Gräben in dem Zellenfeld an einer der jeweils zugehörigen Zelle abgewandten Seite geringer als der Abstand der Gräben zweier unmittelbar benachbarter Transistorzellen in dem Zellenfeld, um zwischen diesen enger benachbarten Gräben einen ”geschützten Bereich” für die Integration von Niedervoltbauelementen zu bilden. It is envisaged to provide in the cell array a region for producing integrated low-voltage components which have their connections in the region of the front side of the semiconductor body, wherein the breakdown voltage in this region must not be lower than the breakdown voltage of the transistor cells. For this purpose, the distance of at least two trenches in the cell array at a side facing away from the respectively associated cell is less than the spacing of the trenches of two immediately adjacent transistor cells in the cell array, in order to form a "protected area" for the integration of low-voltage components between these more closely adjacent trenches ,
Gegenstand der Erfindung ist somit ein Halbleiterbauelement mit einer Anzahl Transistorzellen in einem Zellenfeld und einem solchen im Zellenfeld ausgebildeten Bereich zwischen zwei enger beabstandeten Gräben, in dem ein laterales Nidervoltbauelement integriert ist, dessen Anschlüsse im Bereich der Vorderseite des Halbleiterkörpers liegen. Dieses weitere Halbleiterbauelement ist insbesondere ein Bipolartransistor, ein MOS-Transistor oder eine Diode. Zur Bildung dieses Bauelementes können in dem Bereich zwischen den Gräben auch Mehrfachwannen vorgesehen werden, wobei wenigstens eine dotierte Wanne in einer anderen dotierten Wanne angeordnet ist.The invention thus relates to a semiconductor component having a number of transistor cells in a cell field and such a cell field formed between two closely spaced trenches, in which a lateral Nidervoltbauelement is integrated, whose terminals are in the region of the front side of the semiconductor body. This further semiconductor component is in particular a bipolar transistor, a MOS transistor or a diode. To form this component, multiple wells can also be provided in the region between the trenches, wherein at least one doped well is arranged in another doped well.
Die vorliegende Erfindung wird nachfolgend in Ausführungsbeispielen anhand von Figuren näher erläutert. In den Figuren zeigt:The present invention will be explained in more detail in exemplary embodiments with reference to figures. In the figures shows:
In den Figuren bezeichnen, sofern nicht anders angegeben gleiche Bezugszeichen gleiche Teile mit gleicher Bedeutung. In the figures, unless otherwise stated, like reference numerals designate like parts with the same meaning.
Das Halbleiterbauelement umfasst ein Zellenfeld mit einer Vielzahl gleichartiger aufgebauter Transistorzellen und wenigstens einer am Rand des Zellenfeldes angeordneten Randzelle RZ. Von den Transistorzellen sind in
Das Halbleiterbauelement umfasst in dem dargestellten Ausführungsbeispiel eine erste Anschlusszone mit einer stark dotierten Zone
Die stärker dotierte Zone
Die stark dotierte Zone
Die Drain-Zone
Jede Transistorzelle Z1, Z2, Z3 weist eine Gate-Elektrode
Die Erfindung ist jedoch nicht auf die Verwendung nur einer Elektrode in dem Graben beschränkt. So können in nicht näher dargestellter, jedoch hinlänglich bekannter Weise auch mehrere an ein gemeinsames oder an nicht gemeinsame Potentiale angeschlossene Elektroden neben der Gate-Elektrode in dem Graben vorhanden sein.However, the invention is not limited to the use of only one electrode in the trench. Thus, in a manner not shown in detail but sufficiently well known, several electrodes connected to a common or to non-common potentials can be present in the trench next to the gate electrode.
In dem in
Die Gräben
Das Zellenfeld mit den Transistorzellen Z1, Z2, Z3 ist durch eine Randzelle RZ begrenzt, wobei diese Randzelle eine Feldplatte
Der Abstand zwischen dem Graben
Wie insbesondere
Zur Kontaktierung der Source-Zone
Aus Gründen der Übersichtlichkeit sind die Source-Anschlüsse S, die Gate-Anschlüsse G und der Drain-Anschluss D lediglich schematisch dargestellt. Auf die Darstellung von Verdrahtungsebenen oberhalb des Halbleiterkörpers ist verzichtet. Die Gate-Elektroden
Ein Anschluss
Bei einer weiteren in
Selbstverständlich sind beliebige weitere laterale Bauelemente, wie Bipolartransistoren, Dioden, CMOS-Bauelemente und dergleichen in der Zone zwischen den beiden Gräben realisierbar.Of course, any further lateral components, such as bipolar transistors, diodes, CMOS components and the like can be realized in the zone between the two trenches.
Die Gate-Elektroden
Bei dem Halbleiterbauelement gemäß
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 1111
- Drain-ZoneDrain region
- 1212
- Driftzonedrift region
- 2020
- Body-ZoneBody zone
- 3030
- Source-ZoneSource zone
- 40, 5040, 50
- Grabendig
- 4242
- Gate-ElektrodeGate electrode
- 44, 5444, 54
- Isolationsschichtinsulation layer
- 5252
- Feldplattefield plate
- 60, 6260, 62
- Source-/Body-AnschlussSource / body connection
- 6464
- Gate-ElektrodeGate electrode
- DD
- Drain-AnschlussDrain
- D2D2
- Drain-AnschlussDrain
- GG
- Gate-AnschlussGate terminal
- G2G2
- Gate-AnschlussGate terminal
- RZRZ
- Randzelleedge cell
- SS
- Source-AnschlussSource terminal
- S2S2
- Source-AnschlussSource terminal
- Z1, Z2, Z3, Z4Z1, Z2, Z3, Z4
- Transistorzellentransistor cells
Claims (3)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10262121A DE10262121B4 (en) | 2002-03-28 | 2002-03-28 | Semiconducting component with increased breakdown voltage in edge region has shorter distance from edge cell trench to that of adjacent cell than between trenches of cells in cell field |
DE10214151A DE10214151B4 (en) | 2002-03-28 | 2002-03-28 | Semiconductor device with increased breakdown voltage in the edge region |
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Application Number | Priority Date | Filing Date | Title |
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DE10262121A DE10262121B4 (en) | 2002-03-28 | 2002-03-28 | Semiconducting component with increased breakdown voltage in edge region has shorter distance from edge cell trench to that of adjacent cell than between trenches of cells in cell field |
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Publication Number | Publication Date |
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DE10262121B4 true DE10262121B4 (en) | 2012-03-22 |
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DE10262121A Expired - Lifetime DE10262121B4 (en) | 2002-03-28 | 2002-03-28 | Semiconducting component with increased breakdown voltage in edge region has shorter distance from edge cell trench to that of adjacent cell than between trenches of cells in cell field |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014112338A1 (en) * | 2014-08-28 | 2016-03-03 | Infineon Technologies Austria Ag | Semiconductor device and method for manufacturing a semiconductor device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US599833A (en) * | 1898-03-01 | davis | ||
US4941026A (en) * | 1986-12-05 | 1990-07-10 | General Electric Company | Semiconductor devices exhibiting minimum on-resistance |
US5763915A (en) * | 1996-02-27 | 1998-06-09 | Magemos Corporation | DMOS transistors having trenched gate oxide |
WO2000051167A2 (en) * | 1999-02-26 | 2000-08-31 | Fairchild Semiconductor Corporation | Monolithically integrated trench mosfet and schottky diode |
-
2002
- 2002-03-28 DE DE10262121A patent/DE10262121B4/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US599833A (en) * | 1898-03-01 | davis | ||
US4941026A (en) * | 1986-12-05 | 1990-07-10 | General Electric Company | Semiconductor devices exhibiting minimum on-resistance |
US5763915A (en) * | 1996-02-27 | 1998-06-09 | Magemos Corporation | DMOS transistors having trenched gate oxide |
WO2000051167A2 (en) * | 1999-02-26 | 2000-08-31 | Fairchild Semiconductor Corporation | Monolithically integrated trench mosfet and schottky diode |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014112338A1 (en) * | 2014-08-28 | 2016-03-03 | Infineon Technologies Austria Ag | Semiconductor device and method for manufacturing a semiconductor device |
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