WO2000007245A1 - Leistungshalbleiter mit reduziertem sperrstrom - Google Patents
Leistungshalbleiter mit reduziertem sperrstrom Download PDFInfo
- Publication number
- WO2000007245A1 WO2000007245A1 PCT/DE1999/002000 DE9902000W WO0007245A1 WO 2000007245 A1 WO2000007245 A1 WO 2000007245A1 DE 9902000 W DE9902000 W DE 9902000W WO 0007245 A1 WO0007245 A1 WO 0007245A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- power semiconductor
- emitter
- reverse current
- recombination
- Prior art date
Links
- 239000004065 semiconductor Substances 0.000 title claims abstract description 25
- 230000006798 recombination Effects 0.000 claims abstract description 26
- 238000005215 recombination Methods 0.000 claims abstract description 26
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 8
- 239000001301 oxygen Substances 0.000 claims abstract description 8
- 230000029142 excretion Effects 0.000 claims description 5
- 238000001556 precipitation Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 18
- 239000002800 charge carrier Substances 0.000 description 16
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 125000004430 oxygen atom Chemical group O* 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
- H01L29/30—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by physical imperfections; having polished or roughened surface
- H01L29/32—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by physical imperfections; having polished or roughened surface the imperfections being within the semiconductor body
-
- 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
- H01L29/70—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]
- H01L29/7393—Insulated gate bipolar mode transistors, i.e. IGBT; IGT; COMFET
- H01L29/7395—Vertical transistors, e.g. vertical IGBT
Definitions
- the invention relates to a power semiconductor which has a reduced reverse current and which comprises a first layer of a first conductivity type, a first layer of a second conductivity type, a second layer of the first conductivity type and a second layer of the second conductivity type.
- the invention relates to an insulated-gate bipolar transistor (IGBT) in which the first layer of the first conductivity type is an (anode-side) p-emitter, the first layer of the second conductivity type is an n ⁇ base, and the second layer of the first conductivity type is p + Base and the second layer of the second conductivity type is a (cathode-side) n + emitter.
- IGBT insulated-gate bipolar transistor
- a power semiconductor of the type mentioned above is, for example, a fast switch implemented with IGBT, which is in the on state most of the time and only blocks relatively rarely in order to switch off a short-circuit current.
- the anode-side (collector-side) emitter is provided with a relatively high doping concentration and an increased depth of penetration, so that the emitter efficiency is just below one.
- the life of the wearer in the base zones of the IGBT is made as long as possible in order to increase the transport factor.
- the partial transistor gain factor ⁇ p n p assumes a value that is relatively close to one.
- the transistor amplification results in a large reverse current at a high applied voltage, which leads to the heating of the component.
- this reverse current which is unavoidably flowing in the blocking state, must not become too high. so that the heating effects do not lead to the destruction of the component.
- the object on which the invention is based is to create a power semiconductor which has both a low forward voltage and a low reverse current.
- recombination centers are installed according to the invention which are practically ineffective in the forward state of the semiconductor, that is to say with high charge carrier injection, but have a high efficiency in the blocked state, that is to say with low charge carrier densities.
- These recombination centers are installed in a region of the silicon wafer which, viewed from the anode-side (collector-side) wafer surface, is located just below the surface through the p-
- the power semiconductor according to the invention which comprises a first layer of a first conduction type, a first layer of a second conduction type, a second layer of the first conduction type and a second layer of the second conduction type, is characterized by a recombination area with recombination centers directly on the first layer of the first conduction type, the recombination centers comprising oxygen excretions.
- the recombination region preferably has a vertical extent between 20 and 50 ⁇ m.
- FIG. 1 shows schematically a first power semiconductor with the recombination region according to the invention in cross section.
- FIG. 2 schematically shows a further power semiconductor with the recombination area according to the invention in cross section.
- the power semiconductor shown in FIG. 1 is a non punch through (NPT) IGBT, on the basis of which the invention is first explained below.
- the NPT-IGBT comprises a semiconductor 1, which in the embodiment shown is weakly n-doped and acts as an n " base.
- the n " base 1, which is a first base, is followed by a p + as a second base Base 2, on the surface of which a first n + emitter structure 3 is arranged.
- Charge carriers injected from the emitter 3 pass through a channel in the p + base 2 into the n ⁇ base 1 and from there to an anode-side p emitter 5 on the side of the n ⁇ base 1 opposite the p base 2.
- the current of the charge carriers through the channel is controlled by a gate 4 on the surface of the semiconductor component, which is separated from the semiconductor by an insulator layer 8.
- the two emitters 3 and 5 are each electrically connected to an external emitter connection via metallizations 7.
- the n " base 1 forms a homogeneous layer.
- the space charge zone that is spanned in the n ⁇ base 1 and the p + base 2 does not reach the anode-side (collector-side) emitter.
- the lifespan of the charge carriers in the event of a block between the edge of the space charge zone and the anode-side (collector-side) emitter should be as low as possible.
- the lifespan of the charge carriers should be as long as possible.
- a recombination region 6 is generated immediately in front of the anode-side (collector-side) emitter 5.
- a non-doping substance is added during the manufacture of the semiconductor component, by means of which 6 recombination centers are created in the recombination region and the life of the charge carriers is shortened.
- the recombination area 6 directly adjoins the anode-side (collector-side) p-emitter 5.
- the area 6 in an NPT-IGBT is thus, seen from the anode or the collector at the bottom in FIG. 1, just below the pn junction formed by the p-emitter 5 and the n _ base 1.
- the recombination region 6 preferably has a thickness on the order of 20 to 50 ⁇ m.
- the recombination area 6 is flooded with charge carriers.
- the recombination centers installed in this area 6 should have the least possible effect in the on state in the high charge carrier injection. In the locked state, i.e. at low charge carrier densities, however, they should have a very high efficiency.
- Oxygen excretions are particularly suitable as a suitable, non-doping additive in region 6. From T. Falter, D. Hellmann, P. Eichinger; Conference proceedings the SPIE conference, Austin (1994), p. 109, it is known that the carrier lifetime set by oxygen excretions is typically more than two orders of magnitude higher in the case of high carrier injections than in the case of low carrier injection. This means that in the case of blocking in the event of a very low charge carrier injection, the charge carrier concentration in the region 6 is reduced by recombinations, in particular since the current amplification by the p-emitter on the anode side is reduced by the recombinations.
- the charge carrier injection by the emitter 5 increases, ie if the power semiconductor changes from the blocking state to the conductive state, the charge carrier concentration in the region 6 rises sharply, that is to say the semiconductor is flooded with charge carriers and the charge carriers hardly take up the region 6 true, since at high injection the recombination rate due to the oxygen excretion is relatively low.
- the desired vertical distribution of the oxygen separations in the area 6 can be e.g. Manufacture by implanting oxygen atoms in the anode side (collector side) of the component, which are distributed to the desired depth by a subsequent high-temperature process and accumulate there during the cooling process at the end of the high-temperature process to form oxygen precipitates.
- the oxygen atoms can be introduced into the crystal by anode-side or collector-side oxidation of the silicon surface, it being possible for the cathode side (emitter side) to be covered beforehand with a protective layer, for example from an SiO 2 / Si 3 N 4 layer package, in order to form a cathode side Avoid diffusion of oxygen atoms.
- a protective layer for example from an SiO 2 / Si 3 N 4 layer package
- NPT-IGBT As a power semiconductor.
- the technical teaching disclosed also applies to other re power components such as punch through (PT) IGBTs, thyristors and switchable (GTO) thyristors can be used.
- PT punch through
- thyristors thyristors
- GTO switchable thyristors
- the collector-side emitter is preceded by a highly doped stop zone 9, which is of a line type that is opposite to the line type of the emitter 5.
- a weakly doped (n ⁇ -) layer 1 is only connected to the stop zone 9.
- the recombination region 6 in such a PT-IGBT is preferably in the transition region between the anode-side (collector-side) emitter 5 and the heavily doped stop zone 6 or is part of the stop zone 9 or the emitter 5.
- Reference symbols designate identical regions as in FIG. 1.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19981445T DE19981445B4 (de) | 1998-07-29 | 1999-07-01 | Leistungshalbleiter mit reduziertem Sperrstrom |
AU58475/99A AU5847599A (en) | 1998-07-29 | 1999-07-01 | Power semiconductor having a reduced reverse current |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19834214 | 1998-07-29 | ||
DE19834214.4 | 1998-07-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000007245A1 true WO2000007245A1 (de) | 2000-02-10 |
Family
ID=7875751
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1999/002000 WO2000007245A1 (de) | 1998-07-29 | 1999-07-01 | Leistungshalbleiter mit reduziertem sperrstrom |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU5847599A (de) |
DE (1) | DE19981445B4 (de) |
WO (1) | WO2000007245A1 (de) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002027802A1 (de) * | 2000-09-29 | 2002-04-04 | Eupec Gesellschaft Für Leistungshalbleiter Mbh & Co. Kg | Verfahren zum herstellen eines körpers aus halbleitermaterial mit reduzierter mittlerer freier weglänge |
DE10030381B4 (de) * | 2000-06-21 | 2005-04-14 | eupec Europäische Gesellschaft für Leistungshalbleiter mbH & Co. KG | Leistungshalbleiterbauelement aufweisend einen Körper aus Halbleitermaterial mit Übergang zwischen zueinander entgegengesetzten Leiterfähigkeitstypen |
DE102006006700A1 (de) * | 2006-02-13 | 2007-08-23 | Infineon Technologies Austria Ag | Halbleiterbauelement insbesondere Leistungshalbleiterbauelement mit Ladungsträgerrekombinationszonen und Verfahren zur Herstellung desselben |
CN100459151C (zh) * | 2007-01-26 | 2009-02-04 | 北京工业大学 | 具有内透明集电极的绝缘栅双极晶体管 |
US11522047B2 (en) * | 2019-06-12 | 2022-12-06 | Mqsemi Ag | Non-punch-through reverse-conducting power semiconductor device and method for producing same |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1986002202A1 (en) * | 1984-09-28 | 1986-04-10 | Motorola, Inc. | Charge storage depletion region discharge protection |
EP0327316A2 (de) * | 1988-02-04 | 1989-08-09 | Kabushiki Kaisha Toshiba | Halbleitervorrichtung mit zusammengesetztem Substrat, hergestellt aus zwei Halbleitersubstraten in engem Kontakt |
EP0556739A1 (de) * | 1992-02-20 | 1993-08-25 | Hitachi, Ltd. | Gate-Turn-Off-Thyristor und diesen verwendenden Leistungswandler |
DE4223914A1 (de) * | 1992-06-30 | 1994-01-13 | Fraunhofer Ges Forschung | Verfahren zum Herstellen eines vertikalen Leistungsbauelementes mit reduzierter Minoritätsträgerlebensdauer in dessen Driftstrecke |
WO1998015010A1 (de) * | 1996-09-30 | 1998-04-09 | Eupec Europäische Gesellschaft Für Leistungshalbleiter Mbh + Co. Kg | Thyristor mit durchbruchbereich |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4311534A (en) * | 1980-06-27 | 1982-01-19 | Westinghouse Electric Corp. | Reducing the reverse recovery charge of thyristors by nuclear irradiation |
GB2213988B (en) * | 1987-12-18 | 1992-02-05 | Matsushita Electric Works Ltd | Semiconductor device |
DE4036222A1 (de) * | 1990-11-14 | 1992-05-21 | Bosch Gmbh Robert | Verfahren zur herstellung von halbleiterelementen, insbesondere von dioden |
-
1999
- 1999-07-01 WO PCT/DE1999/002000 patent/WO2000007245A1/de active Application Filing
- 1999-07-01 AU AU58475/99A patent/AU5847599A/en not_active Abandoned
- 1999-07-01 DE DE19981445T patent/DE19981445B4/de not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1986002202A1 (en) * | 1984-09-28 | 1986-04-10 | Motorola, Inc. | Charge storage depletion region discharge protection |
EP0327316A2 (de) * | 1988-02-04 | 1989-08-09 | Kabushiki Kaisha Toshiba | Halbleitervorrichtung mit zusammengesetztem Substrat, hergestellt aus zwei Halbleitersubstraten in engem Kontakt |
EP0556739A1 (de) * | 1992-02-20 | 1993-08-25 | Hitachi, Ltd. | Gate-Turn-Off-Thyristor und diesen verwendenden Leistungswandler |
DE4223914A1 (de) * | 1992-06-30 | 1994-01-13 | Fraunhofer Ges Forschung | Verfahren zum Herstellen eines vertikalen Leistungsbauelementes mit reduzierter Minoritätsträgerlebensdauer in dessen Driftstrecke |
WO1998015010A1 (de) * | 1996-09-30 | 1998-04-09 | Eupec Europäische Gesellschaft Für Leistungshalbleiter Mbh + Co. Kg | Thyristor mit durchbruchbereich |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10030381B4 (de) * | 2000-06-21 | 2005-04-14 | eupec Europäische Gesellschaft für Leistungshalbleiter mbH & Co. KG | Leistungshalbleiterbauelement aufweisend einen Körper aus Halbleitermaterial mit Übergang zwischen zueinander entgegengesetzten Leiterfähigkeitstypen |
WO2002027802A1 (de) * | 2000-09-29 | 2002-04-04 | Eupec Gesellschaft Für Leistungshalbleiter Mbh & Co. Kg | Verfahren zum herstellen eines körpers aus halbleitermaterial mit reduzierter mittlerer freier weglänge |
KR100898759B1 (ko) * | 2000-09-29 | 2009-05-25 | 오이펙 오이로패이쉐 게젤샤프트 퓌어 라이스퉁스할브라이터 엠베하 | 평균자유경로길이가 줄어든 도핑된 반도체 재료로 이루어진 몸체의 제조방법 및 상기 도핑된 반도체 재료의 몸체 |
US9608128B2 (en) | 2000-09-29 | 2017-03-28 | Infineon Technologies Ag | Body of doped semiconductor material having scattering centers of non-doping atoms of foreign matter disposed between two layers of opposing conductivities |
DE102006006700A1 (de) * | 2006-02-13 | 2007-08-23 | Infineon Technologies Austria Ag | Halbleiterbauelement insbesondere Leistungshalbleiterbauelement mit Ladungsträgerrekombinationszonen und Verfahren zur Herstellung desselben |
DE102006006700B4 (de) * | 2006-02-13 | 2008-03-13 | Infineon Technologies Austria Ag | Halbleiterbauelement insbesondere Leistungshalbleiterbauelement mit Ladungsträgerrekombinationszonen und Verfahren zur Herstellung desselben |
DE102006006700B9 (de) * | 2006-02-13 | 2008-07-10 | Infineon Technologies Austria Ag | Halbleiterbauelement insbesondere Leistungshalbleiterbauelement mit Ladungsträgerrekombinationszonen und Verfahren zur Herstellung desselben |
CN100459151C (zh) * | 2007-01-26 | 2009-02-04 | 北京工业大学 | 具有内透明集电极的绝缘栅双极晶体管 |
US11522047B2 (en) * | 2019-06-12 | 2022-12-06 | Mqsemi Ag | Non-punch-through reverse-conducting power semiconductor device and method for producing same |
Also Published As
Publication number | Publication date |
---|---|
DE19981445D2 (de) | 2001-02-22 |
DE19981445B4 (de) | 2005-09-22 |
AU5847599A (en) | 2000-02-21 |
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