JPH06504882A - 減少した閾値電圧を有する電力fet - Google Patents
減少した閾値電圧を有する電力fetInfo
- Publication number
- JPH06504882A JPH06504882A JP5509335A JP50933593A JPH06504882A JP H06504882 A JPH06504882 A JP H06504882A JP 5509335 A JP5509335 A JP 5509335A JP 50933593 A JP50933593 A JP 50933593A JP H06504882 A JPH06504882 A JP H06504882A
- Authority
- JP
- Japan
- Prior art keywords
- region
- power fet
- substrate
- conductivity type
- base region
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000002829 reductive effect Effects 0.000 title description 3
- 239000012535 impurity Substances 0.000 claims description 41
- 239000000758 substrate Substances 0.000 claims description 17
- 210000000746 body region Anatomy 0.000 claims description 11
- 239000004065 semiconductor Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims 1
- 230000003071 parasitic effect Effects 0.000 description 8
- 238000009792 diffusion process Methods 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 4
- 239000002019 doping agent Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007943 implant Substances 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 3
- 239000005380 borophosphosilicate glass Substances 0.000 description 2
- 238000002513 implantation Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229920002120 photoresistant polymer Polymers 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon 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
- H01L29/66—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
-
- 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
- H01L29/08—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 with semiconductor regions connected to an electrode carrying current to be rectified, amplified or switched and such electrode being part of a semiconductor device which comprises three or more electrodes
- H01L29/0843—Source or drain regions of field-effect devices
- H01L29/0847—Source or drain regions of field-effect devices of field-effect transistors with insulated gate
-
- 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
- H01L29/10—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 with semiconductor regions connected to an electrode not carrying current to be rectified, amplified or switched and such electrode being part of a semiconductor device which comprises three or more electrodes
- H01L29/1095—Body region, i.e. base region, of DMOS transistors or IGBTs
-
- 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
Claims (7)
- 1.上下表面と第1導電型の半導体本体を有する基板より構成される電力FET において、本体は上下の表面間に電流通路を提供するとともに、前記上表面へ伸 びる少なくとも1つの本体領域および上表面から基板へ伸びる少なくとも1つの ベース領域を有し、ベース領域は第1導電型と反対の第2導電型であるとともに 、前記基板の前記上表面に隣接して位置する上部と前記上部によって前記基板の 前記上表面から分離された下部を有し、前記上部は基板の上表面に隣接する電流 通路に設けられるチャンネルを定義し、FETは、更に、本体領域上の上表面に 設けられる絶縁ゲートを有し、改良が前記ベース領域の前記下部よりも低い不純 物濃度を前記チャンネルに与えるために前記基板の前記上表面から前記チャンネ ルへ伸びる不純物層領域を含むことを特徴とする電力FET。
- 2.前記不純物層領域が前記基板へ第1導電型の不純物を導入することによって 形成される請求項1記載の電力FET。
- 3.前記不純物層領域が前記ベース領域および前記ベース領域に隣接する前記本 体領域の限定された部分に閉じ込められる請求項2記載の電力FET。
- 4.前記不純物層領域が前記絶縁ゲートの下方に位置する前記本体領域の実質的 な部分から欠けている請求項3記載の電力FET。
- 5.前記不純物層領域が前記ベース領域から離れる方向で前記基板に向かってテ ーパを有する前記本体領域において濃度勾配を有する請求項4記載の電力FET 。
- 6.前記ベース領域が第2の導電型の不純物を前記基板へ導入することによって 形成され、第2の導電型の不純物は前記本体領域に向かう方向で前記基板の上表 面に向かうテーパを有する前記チャンネルにおいて濃度勾配を有する請求項5記 載の電力FET。
- 7.前記チャンネルの第2導電型の不純物の濃度勾配が前記本体領域の第1導電 型の不純物の濃度勾配に比例する請求項6記載の電力FET。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US789,901 | 1991-11-12 | ||
US07/789,901 US5218220A (en) | 1991-11-12 | 1991-11-12 | Power fet having reduced threshold voltage |
PCT/US1992/009593 WO1993010563A1 (en) | 1991-11-12 | 1992-11-12 | Power fet having reduced threshold voltage |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH06504882A true JPH06504882A (ja) | 1994-06-02 |
JP3437967B2 JP3437967B2 (ja) | 2003-08-18 |
Family
ID=25149041
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP50933593A Expired - Fee Related JP3437967B2 (ja) | 1991-11-12 | 1992-11-12 | 減少した閾値電圧を有する電力fet |
Country Status (5)
Country | Link |
---|---|
US (1) | US5218220A (ja) |
EP (1) | EP0567623B1 (ja) |
JP (1) | JP3437967B2 (ja) |
DE (1) | DE69223945T2 (ja) |
WO (1) | WO1993010563A1 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001508595A (ja) * | 1997-05-07 | 2001-06-26 | シリコニックス・インコーポレイテッド | 側壁スペーサを用いる高密度トレンチ形dmosの製造 |
JP2008199048A (ja) * | 2008-03-31 | 2008-08-28 | Siliconix Inc | 側壁スペーサを用いる高密度トレンチ形dmosの製造 |
WO2011048804A1 (ja) * | 2009-10-22 | 2011-04-28 | パナソニック株式会社 | 半導体装置およびその製造方法 |
JP2015041644A (ja) * | 2013-08-20 | 2015-03-02 | 富士電機株式会社 | Mos型半導体装置の製造方法 |
US9331194B2 (en) | 2012-10-18 | 2016-05-03 | Fuji Electric Co., Ltd. | Semiconductor device and method for manufacturing semiconductor device |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05160407A (ja) * | 1991-12-09 | 1993-06-25 | Nippondenso Co Ltd | 縦型絶縁ゲート型半導体装置およびその製造方法 |
EP0931353A1 (en) * | 1996-10-25 | 1999-07-28 | Siliconix Incorporated | Threshold adjust in vertical dmos transistor |
KR100486347B1 (ko) * | 1997-08-20 | 2006-04-21 | 페어차일드코리아반도체 주식회사 | 절연게이트양극성트랜지스터 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6218769A (ja) * | 1985-07-17 | 1987-01-27 | Tdk Corp | 縦形半導体装置及びその製造方法 |
EP0222326A2 (en) * | 1985-11-12 | 1987-05-20 | General Electric Company | Method of fabricating an improved insulated gate semiconductor device |
US4803533A (en) * | 1986-09-30 | 1989-02-07 | General Electric Company | IGT and MOSFET devices having reduced channel width |
JP2604777B2 (ja) * | 1988-01-18 | 1997-04-30 | 松下電工株式会社 | 二重拡散型電界効果半導体装置の製法 |
JPH01283966A (ja) * | 1988-05-11 | 1989-11-15 | Fuji Electric Co Ltd | 絶縁ゲート型バイポーラトランジスタの製造方法 |
-
1991
- 1991-11-12 US US07/789,901 patent/US5218220A/en not_active Expired - Lifetime
-
1992
- 1992-11-12 DE DE69223945T patent/DE69223945T2/de not_active Expired - Fee Related
- 1992-11-12 JP JP50933593A patent/JP3437967B2/ja not_active Expired - Fee Related
- 1992-11-12 EP EP92924346A patent/EP0567623B1/en not_active Expired - Lifetime
- 1992-11-12 WO PCT/US1992/009593 patent/WO1993010563A1/en active IP Right Grant
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001508595A (ja) * | 1997-05-07 | 2001-06-26 | シリコニックス・インコーポレイテッド | 側壁スペーサを用いる高密度トレンチ形dmosの製造 |
JP2008199048A (ja) * | 2008-03-31 | 2008-08-28 | Siliconix Inc | 側壁スペーサを用いる高密度トレンチ形dmosの製造 |
WO2011048804A1 (ja) * | 2009-10-22 | 2011-04-28 | パナソニック株式会社 | 半導体装置およびその製造方法 |
US8421151B2 (en) | 2009-10-22 | 2013-04-16 | Panasonic Corporation | Semiconductor device and process for production thereof |
US9331194B2 (en) | 2012-10-18 | 2016-05-03 | Fuji Electric Co., Ltd. | Semiconductor device and method for manufacturing semiconductor device |
US9608057B2 (en) | 2012-10-18 | 2017-03-28 | Fuji Electric Co., Ltd. | Semiconductor device and method for manufacturing semiconductor device |
JP2015041644A (ja) * | 2013-08-20 | 2015-03-02 | 富士電機株式会社 | Mos型半導体装置の製造方法 |
Also Published As
Publication number | Publication date |
---|---|
JP3437967B2 (ja) | 2003-08-18 |
DE69223945D1 (de) | 1998-02-12 |
EP0567623B1 (en) | 1998-01-07 |
DE69223945T2 (de) | 1998-08-06 |
US5218220A (en) | 1993-06-08 |
WO1993010563A1 (en) | 1993-05-27 |
EP0567623A1 (en) | 1993-11-03 |
EP0567623A4 (en) | 1993-12-15 |
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