DE19948901B4 - Field effect controllable semiconductor device - Google Patents
Field effect controllable semiconductor device Download PDFInfo
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- DE19948901B4 DE19948901B4 DE1999148901 DE19948901A DE19948901B4 DE 19948901 B4 DE19948901 B4 DE 19948901B4 DE 1999148901 DE1999148901 DE 1999148901 DE 19948901 A DE19948901 A DE 19948901A DE 19948901 B4 DE19948901 B4 DE 19948901B4
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 73
- 230000005669 field effect Effects 0.000 title description 2
- 238000002347 injection Methods 0.000 claims abstract description 24
- 239000007924 injection Substances 0.000 claims abstract description 24
- 238000002955 isolation Methods 0.000 abstract description 2
- 108091006146 Channels Proteins 0.000 description 14
- 239000010410 layer Substances 0.000 description 9
- 239000000758 substrate Substances 0.000 description 7
- 239000002800 charge carrier Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 102000004129 N-Type Calcium Channels Human genes 0.000 description 1
- 108090000699 N-Type Calcium Channels Proteins 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 239000012791 sliding layer 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 specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a 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
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- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/04—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body
- H01L27/06—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including a plurality of individual components in a non-repetitive configuration
- H01L27/0611—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including a plurality of individual components in a non-repetitive configuration integrated circuits having a two-dimensional layout of components without a common active region
- H01L27/0617—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including a plurality of individual components in a non-repetitive configuration integrated circuits having a two-dimensional layout of components without a common active region comprising components of the field-effect type
- H01L27/0629—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including a plurality of individual components in a non-repetitive configuration integrated circuits having a two-dimensional layout of components without a common active region comprising components of the field-effect type in combination with diodes, or resistors, or capacitors
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- H01L29/063—Reduced surface field [RESURF] pn-junction structures
- H01L29/0634—Multiple reduced surface field (multi-RESURF) structures, e.g. double RESURF, charge compensation, cool, superjunction (SJ), 3D-RESURF, composite buffer (CB) structures
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
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- H01L29/70—Bipolar devices
- H01L29/72—Transistor-type devices, i.e. able to continuously respond to applied control signals
- H01L29/739—Transistor-type devices, i.e. able to continuously respond to applied control signals controlled by field-effect, e.g. bipolar static induction transistors [BSIT]
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
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- 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
- H01L29/7808—Vertical DMOS transistors, i.e. VDMOS transistors structurally associated with at least one other device the other device being a breakdown diode, e.g. Zener diode
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Abstract
Halbleiterbauelement
das folgende Merkmale aufweist:
– einen Halbleiterkörper (2)
mit einer Leitungszone (4) eines ersten Leitungstyps, Anschlußzonen (6)
des ersten Leitungstyps, zwischen den Anschlußzonen (6) und der Leitungszone
(4) angeordnete Kanalzonen (8) eines zweiten Leitungstyps die im
Bereich einer Oberfläche
des Halbleiterkörpers
(2) ausgebildet sind, und mit einer Vielzahl von beabstandet zueinander
in der Leitungszone angeordneten Bereichen (10) des zweiten Leitungstyps,
– eine isoliert
gegenüber
den Kanalzonen (8) angeordnete Steuerelektrode (20),
dadurch
gekennzeichnet, dass
– ein
in dem Halbleiterkörper
(2) angeordnetes Injektionsgebiet (16) des zweiten Leitungstyps,
das an eine Ladungsquelle angeschlossen ist und das im Bereich derselben Oberfläche des
Halbleiterkörpers
(2) wie die Kanalzonen (6) angeordnet ist,
das Injektionsgebiet
beabstandet zu den Kanalzonen (6) angeordnet ist und dass ein Gebiet
(30) des zweiten Leitungstyps, das an eine oberhalb des Halbleiterkörpers (2) angeordnete
Feldplatte (32) angeschlossen ist, zwischen der Kanalzone (8) und
dem Injektionsgebiet (16) angeordnet...Semiconductor device having the following features:
A semiconductor body (2) having a conduction zone (4) of a first conduction type, junction zones (6) of the first conduction type, channel zones (8) of a second conduction type arranged between the junction zones (6) and the conduction zone (4) and located in the region of a surface of the Semiconductor body (2) are formed, and having a plurality of spaced apart in the line zone regions arranged (10) of the second conductivity type,
A control electrode (20) arranged in isolation with respect to the channel zones (8),
characterized in that
An injection region (16) of the second conductivity type arranged in the semiconductor body (2), which is connected to a charge source and which is arranged in the region of the same surface of the semiconductor body (2) as the channel regions (6),
the injection area is arranged at a distance from the channel zones (6), and in that a region (30) of the second conductive type, which is connected to a field plate (32) arranged above the semiconductor body (2), is arranged between the channel zone (8) and the injection zone (16 ) ...
Description
Die vorliegende Erfindung betrifft ein Halbleiterbauelement das folgende Merkmale aufweist:
- – einen Halbleiterkörper mit
einer Leitungszone eines ersten Leitungstyps, einer Anschlußzone des
ersten Leitungstyps, einer zwischen der Anschlußzone und der Leitungszone
(
4 ) angeordneten Kanalzone eines zweiten Leitungstyps und mit einer Vielzahl von beabstandet zueinander in der Leitungszone angeordneten Bereichen des zweiten Leitungstyps, - – eine isoliert gegenüber der Kanalzone angeordnete Steuerelektrode.
- A semiconductor body having a conduction zone of a first conductivity type, a junction region of the first conduction type, one between the junction zone and the conduction zone (
4 ) arranged channel region of a second conductivity type and with a plurality of spaced apart in the line region regions of the second conductivity type, - - An isolated with respect to the channel zone arranged control electrode.
Derartige
Halbleiterbauelemente sind aus der
Um zu verhindern, dass die ausgeräumten Zonen um die gleitenden Gebiete erhalten bleiben bzw. dass die p-leitenden Gebiete aufgeladen bleiben, wenn die Drain-Source-Spannung abnimmt und der MOSFET wieder leiten soll, ist bei dem bekannten Halbleiterbauelement ein "schwacher Injektor" vorgesehen, der beispielsweise als Schottky-Kontakt oder als gleitende Schicht zwischen die Leitungsschicht und einen Drain-Anschluss des MOSFET oder als p-leitende Wanne(n) in dem/den Bereich(en) der Kontaktzone(n) ausgebildet ist. Durch den Injektor werden im leitenden Zustand des MOSFET Löcher oder p-Ladungsträger in die Leitungszone injiziert, die die p-leitenden Gebiete entladen und so eine gute Leitfähigkeit der Leitungszone wiederherstellen.Around to prevent the cleared zones to maintain the moving areas or that the p-type Areas remain charged as the drain-source voltage decreases and the MOSFET is to re-conduct, is in the known semiconductor device provided a "weak injector", the for example, as a Schottky contact or as a sliding layer between the line layer and a drain terminal of the MOSFET or as P-type well (s) formed in the region (s) of the contact zone (s) is. Through the injector in the conductive state of the MOSFET holes or p-type carrier injected into the conduction zone, which discharge the p-type regions and so a good conductivity Restore the line zone.
Nachteilig wirkt sich dabei aus, dass insbesondere das Vorsehen des schwachen Injektors zwischen der Leitungszone und dem Drain-Anschluss einen zusätzlichen Widerstand bzw. einen zusätzlichen Spannungsabfall hervorruft.adversely has the effect that, in particular, the provision of the weak Injector between the conduction zone and the drain port one additional Resistance or an additional Voltage drop causes.
Die
Die
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein durch Feldeffekt steuerbares Halbleiterbauelement zur Verfügung zu stellen, das in gesperrtem Zustand eine hohe Spannungsfestigkeit und in leitendem Zustand eine gute Leitfähig keit aufweist und das insbesondere die oben genannten Nachteile nicht aufweist.Of the present invention is based on the object by a field effect To provide controllable semiconductor device in locked Condition a high withstand voltage and in a conductive state one good conductivity and in particular does not have the above-mentioned disadvantages having.
Diese Aufgabe wird durch ein Halbleiterbauelement gelöst, das neben den eingangs genannten Merkmalen ein in den Halbleiterkörper eingebrachtes Injektionsgebiet des zweiten Leitungstyps aufweist, das an eine Ladungsquelle angeschlossen ist.These Task is solved by a semiconductor device, in addition to the above mentioned features a introduced into the semiconductor body injection area of the second conductivity type connected to a charge source is.
Wenn das Halbleiterbauelement leiten soll, liefert die Ladungsquelle Ladungsträger des zweiten Leitungstyps in die Leitungszone, um die nach dem Sperren des Halbleiterbauelements aufgeladenen Gebiete des zweiten Leitungstyps zu entladen und so eine gute Leitfähigkeit zu gewährleisten.If to conduct the semiconductor device, provides the charge source charge carrier of the second conductivity type into the conduction zone to those after the blocking of the semiconductor device charged areas of the second conductivity type To discharge and thus to ensure a good conductivity.
Das Injektionsgebiet des ersten zweiten Leitungstyps ist vorzugsweise hochdotiert und in ein hochdotiertes Gebiet des ersten Leitungstyps eingebettet. Das Injektionsgebiet des zweiten Leitungstyps und das umgebende des ersten Leitungstyps Gebiet wirken als Injektor nach Art einer Zenerdiode.The Injection region of the first second conductivity type is preferably highly doped and in a highly doped area of the first conductivity type embedded. The injection region of the second conductivity type and the Surroundings of the first conductivity type area act as an injector Type of zener diode.
Die Ladungsquelle ist vorzugsweise eine zwischen das Injektionsgebiet und ein Bezugspotential geschaltete Kapazität. Die Kapazität wird bei sperrendem Halbleiterbauelement auf das Potential der an die Leitungszone angeschlossenen Klemme des Halbleiterbauelements abzüglich der Durchbruchspannung der Zenerdiode aufgeladen. Bei leitendem Halbleiterbauelement wird die in der Kapazität gespeicherte Ladung in die Leitungszone injiziert, um die Gebiete des zweiten Leitungstyps zu entladen und eine gute Leitfähikeit zu erreichen. Die volle Leitfähigkeit wird bereits kurz nach Anlegen einer entsprechenden Steuerspannung an die Steuerelektrode erreicht.The charge source is preferably a capacitance connected between the injection area and a reference potential. When the semiconductor device is blocking, the capacitance is charged to the potential of the terminal of the semiconductor component connected to the line zone minus the breakdown voltage of the zener diode. When the semiconductor device is conductive, the charge stored in the capacitance is injected into the conduction zone to discharge the regions of the second conductivity type and to achieve good conductivity. The full conductivity is already shortly after applying a corresponding control voltage to the control electrode reached.
Gemäß einer weiteren Ausführungsform ist vorgesehen, das Injektionsgebiet, vorzugsweise über einen Widerstand und eine Diode an ein Hilfspotential anzulegen.According to one another embodiment is provided, the injection area, preferably via a Resistor and a diode to create an auxiliary potential.
Das Halbleiterbauelement ist vorzugsweise als vertikaler MOSFET ausgebildet, wobei eine erste Anschlußklemme an einer Rückseite des Halbleiterkörpers an die Leitungszone angeschlossen ist. Die Kanalzone befindet sich dabei im Bereich einer Vorderseite des Halbleiterkörpers, über der die Steuerelektrode angeordnet ist. Vorzugsweise sind wannenartig im Bereich der Vorderseite angeordnete, die Kanalzone(n) umgebende Gebiete des zweiten Leitungstyps vorgesehen, die leitend mit darüber angeordneten Feldplatten verbunden sind.The Semiconductor device is preferably formed as a vertical MOSFET, wherein a first terminal on a backside of the semiconductor body connected to the line zone. The channel zone is located while in the region of a front side of the semiconductor body, above the the control electrode is arranged. Preferably, trough-like arranged in the region of the front, surrounding the channel zone (s) Provided areas of the second conductivity type, the conductively arranged with it Field plates are connected.
Aufgabe dieser Gebiete des zweiten Leitungstyps und der Feldplatten ist es, die Ausbreitung von Ladungsträgern in lateraler Richtung zu begrenzen. Das Injektionsgebiet ist vorzugs weise beabstandet zu den Kanalzonen, getrennt durch diese Gebiete angeordnet.task these areas of the second conductivity type and the field plates is it, the propagation of charge carriers in the lateral direction to limit. The injection area is preferably spaced to the canal zones, separated by these areas.
Die vorliegende Erfindung wird nachfolgend in Ausführungsbeispielen anhand von Figuren näher erläutert. Es zeigen:The The present invention will be described below in exemplary embodiments with reference to FIG Figures explained in more detail. It demonstrate:
In den Figuren bezeichnen, sofern nicht anders angegeben, gleiche Bezugszeichen gleiche Teile und Bereiche mit gleicher Bedeutung.In denote the figures, unless otherwise indicated, like reference numerals same parts and areas with the same meaning.
In
der Leitungszone
Wenigstens
einige der Gebiete
In
den Halbleiterkörper
Das
Halbleiterbauelement gemäß der Ausführungsform
weist weiterhin wenigstens ein p-dotiertes Gebiet
Das
Injektionsgebiet
Die Funktionsweise des erfindungsgemäßen Halbleiterbauelements wird im folgenden kurz beschrieben.The Operation of the semiconductor device according to the invention is briefly described below.
Bei
Anlegen eines positiven Potentials an die Gate-Elektrode G, bzw.
bei Anlegen einer positiven Spannung zwischen der Gate-Elektrode
und dem Source-Anschluß S
bildet sich in der Kanalzone
Sperrt
der Kanal in der Kanalzone
Wird
das Halbleiterbauelement anschließend durch Anlegen einer Ansteuerspannung
an die Gate-Elektrode G leitend gemacht, bleiben die p-Gebiete
Der
erfindungsgemäße Injektor
mit der Zenerdiode
Das
Ersatzschaltbild einer weiteren Ausführungsform des erfindungsgemäßen Halbleiterbauelements
ist in
- 22
- HalbleiterkörperSemiconductor body
- 33
- leitende Schichtsenior layer
- 44
- Leitungszoneembedment
- 66
- n+-Anschlußzonen + connection zone
- 88th
- p-Kanalzonep-channel region
- 1010
- p+-Gebietp + area
- 1414
- p+-Verbindungenp + compounds
- 1616
- p+-Injektionsgebietp + injection area
- 1818
- n+-Wannen + tub
- 2020
- Steuerelektrodecontrol electrode
- 3030
- p-Gebietp-type region
- 3232
- Feldplattenfield plates
- 3636
- Feldplattefield plate
- CC
- Kapazitätcapacity
- DD
- Drain-AnschlußDrain
- DIDI
- Diodediode
- GG
- Gate-AnschlußGate
- MM
- Bezugspotentialreference potential
- OxOx
- Isolationsschichtinsulation layer
- RR
- Widerstandresistance
- SS
- Source-AnschlußSource terminal
- U+U +
- Hilfspotentialauxiliary potential
- V+V +
- Versorgungspotentialsupply potential
- ZZ
- ZenerdiodeZener diode
Claims (5)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1999148901 DE19948901B4 (en) | 1999-10-11 | 1999-10-11 | Field effect controllable semiconductor device |
PCT/EP2000/009962 WO2001028002A1 (en) | 1999-10-11 | 2000-10-10 | Semiconductor component, controlled by field effect |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1999148901 DE19948901B4 (en) | 1999-10-11 | 1999-10-11 | Field effect controllable semiconductor device |
Publications (2)
Publication Number | Publication Date |
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DE19948901A1 DE19948901A1 (en) | 2001-04-19 |
DE19948901B4 true DE19948901B4 (en) | 2008-05-08 |
Family
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DE1999148901 Expired - Fee Related DE19948901B4 (en) | 1999-10-11 | 1999-10-11 | Field effect controllable semiconductor device |
Country Status (2)
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DE (1) | DE19948901B4 (en) |
WO (1) | WO2001028002A1 (en) |
Families Citing this family (3)
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---|---|---|---|---|
DE10108046B4 (en) * | 2001-02-20 | 2006-10-19 | Infineon Technologies Ag | Semiconductor device |
DE10145723A1 (en) * | 2001-09-17 | 2003-04-10 | Infineon Technologies Ag | Semiconductor structure |
DE102005023026B4 (en) | 2005-05-13 | 2016-06-16 | Infineon Technologies Ag | Power semiconductor device with plate capacitor structure |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0563952A1 (en) * | 1992-04-03 | 1993-10-06 | Hitachi, Ltd. | Composite controlled semiconductor device and power conversion device using the same |
DE19815907C1 (en) * | 1998-04-08 | 1999-05-27 | Siemens Ag | Field effect semiconductor element |
DE19819590C1 (en) * | 1998-04-30 | 1999-06-24 | Siemens Ag | Power MOSFET for high conductivity transistor switch |
-
1999
- 1999-10-11 DE DE1999148901 patent/DE19948901B4/en not_active Expired - Fee Related
-
2000
- 2000-10-10 WO PCT/EP2000/009962 patent/WO2001028002A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0563952A1 (en) * | 1992-04-03 | 1993-10-06 | Hitachi, Ltd. | Composite controlled semiconductor device and power conversion device using the same |
DE19815907C1 (en) * | 1998-04-08 | 1999-05-27 | Siemens Ag | Field effect semiconductor element |
DE19819590C1 (en) * | 1998-04-30 | 1999-06-24 | Siemens Ag | Power MOSFET for high conductivity transistor switch |
Also Published As
Publication number | Publication date |
---|---|
DE19948901A1 (en) | 2001-04-19 |
WO2001028002A1 (en) | 2001-04-19 |
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