JP5539931B2 - 炭化珪素トレンチ半導体装置 - Google Patents
炭化珪素トレンチ半導体装置 Download PDFInfo
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- JP5539931B2 JP5539931B2 JP2011166865A JP2011166865A JP5539931B2 JP 5539931 B2 JP5539931 B2 JP 5539931B2 JP 2011166865 A JP2011166865 A JP 2011166865A JP 2011166865 A JP2011166865 A JP 2011166865A JP 5539931 B2 JP5539931 B2 JP 5539931B2
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- 239000004065 semiconductor Substances 0.000 title claims description 45
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims description 31
- 229910010271 silicon carbide Inorganic materials 0.000 title claims description 31
- 210000000746 body region Anatomy 0.000 claims description 56
- 239000002019 doping agent Substances 0.000 claims description 47
- 238000009792 diffusion process Methods 0.000 claims description 7
- 230000005669 field effect Effects 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 238000002513 implantation Methods 0.000 description 7
- 238000005468 ion implantation Methods 0.000 description 7
- 230000005684 electric field Effects 0.000 description 4
- 238000011065 in-situ storage Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000011295 pitch Substances 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 229920005591 polysilicon Polymers 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- 229910000943 NiAl Inorganic materials 0.000 description 1
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910010038 TiAl Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- VOITXYVAKOUIBA-UHFFFAOYSA-N triethylaluminium Chemical compound CC[Al](CC)CC VOITXYVAKOUIBA-UHFFFAOYSA-N 0.000 description 1
- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical group C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 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
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/12—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/16—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed including, apart from doping materials or other impurities, only elements of Group IV of the Periodic Table
- H01L29/1608—Silicon carbide
-
- 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
- H01L29/02—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 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
- H01L29/40—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
-
- 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
- H01L29/66007—Multistep manufacturing processes
- H01L29/66053—Multistep manufacturing processes of devices having a semiconductor body comprising crystalline silicon carbide
- H01L29/66068—Multistep manufacturing processes of devices having a semiconductor body comprising crystalline silicon carbide the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
-
- 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
- H01L29/7813—Vertical DMOS transistors, i.e. VDMOS transistors with trench gate electrode, e.g. UMOS transistors
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Ceramic Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Electrodes Of Semiconductors (AREA)
Description
105 SiC半導体ボディ
106 第1の表面
107 第2の表面
110 トレンチ
115、115’ 誘電体構造
120、120’ ゲート電極
121 ゲート電極の第1の部分
122 ゲート電極の第2の部分
125、125’ ボディ領域
126、127 側壁
130 ドリフト領域
135、135’ ソース領域
140、140’、142 コンタクト
145、145’ コンタクト領域
150、150’、150” 拡張領域
151 拡張領域上部
152 拡張領域下部
155 ドレイン領域
160 電流拡散領域
Claims (9)
- 炭化珪素半導体ボディと、
第1の表面において前記炭化珪素半導体ボディ内に延びるトレンチと、
前記トレンチ内のゲート誘電体とゲート電極と、
前記トレンチの側壁に接する第1の導電型のボディ領域であって、前記ボディ領域より高い最高ドーパント濃度を含むボデイコンタクト領域を介しコンタクトに電気的に接続されるボディ領域と、
前記ボディ領域を介し前記コンタクトに電気的に接続される第1の導電型の拡張領域と、を含む半導体装置であって、
前記第1の表面に垂直な垂直方向に沿った前記拡張領域の最高ドーパント濃度は、前記垂直方向に沿った前記ボディ領域の最高ドーパント濃度より高く、
前記第1の表面と前記拡張領域の底面との間の距離は、前記第1の表面と前記トレンチの底面との間の距離より大きく、
前記拡張領域は、上部と下部との2つの部分から成り、
前記トレンチの側壁に垂直な横方向に沿った前記拡張領域の上部の幅は、前記拡張領域の下部の幅より小さく、
前記第1の表面に垂直な垂直方向に沿った前記拡張領域の上部の最高ドーパント濃度は、前記垂直方向に沿った前記拡張領域の下部の最高ドーパント濃度より低く、
前記トレンチの側壁に垂直な横方向に沿った前記拡張領域の上部の幅は前記ボディ領域の幅より小さい、半導体装置。 - 前記垂直方向に沿った前記拡張領域の上部と下部のドーパントのプロフィールのそれぞれは逆行プロフィールである、請求項1に記載の半導体装置。
- 前記拡張領域は1013cm−2〜5×1014cm−2のドーパントドーズ量を含む、請求項1または2に記載の半導体装置。
- 前記拡張領域の底面から前記トレンチの底面までの垂直距離は500nm〜1000nmであり、
前記横方向に沿った前記トレンチの幅は1μm〜2μmである、請求項1から3のいずれか1項に記載の半導体装置。 - 前記拡張領域の底面と側面は、前記第1の導電型と異なる第2の導電型のドリフト領域に接する、請求項1から4のいずれか1項に記載の半導体装置。
- 前記トレンチの底面に接する前記第2の導電型の電流拡散領域であって、前記ドリフト領域内の最高ドーパント濃度より高い最高ドーパント濃度を含む電流拡散領域をさらに含む、請求項5に記載の半導体装置。
- 前記電流拡散領域は、3×1012cm−2〜8×1012cm−2のドーパントドーズ量を含む、請求項6に記載の半導体装置。
- 前記半導体装置はトレンチ金属酸化膜半導体電界効果トランジスタである、請求項1から7のいずれか1項に記載の半導体装置。
- 請求項1から8のいずれか1項に記載の半導体装置を含む集積回路。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/854,974 US8525254B2 (en) | 2010-08-12 | 2010-08-12 | Silicone carbide trench semiconductor device |
US12/854,974 | 2010-08-12 |
Publications (2)
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JP2012044167A JP2012044167A (ja) | 2012-03-01 |
JP5539931B2 true JP5539931B2 (ja) | 2014-07-02 |
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Country Status (4)
Country | Link |
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US (1) | US8525254B2 (ja) |
JP (1) | JP5539931B2 (ja) |
CN (1) | CN102376751B (ja) |
DE (1) | DE102011052473B4 (ja) |
Cited By (4)
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US10199493B2 (en) | 2015-10-16 | 2019-02-05 | Fuji Electric Co., Ltd. | Semiconductor device and method of manufacturing semiconductor device |
US10217858B2 (en) | 2015-11-16 | 2019-02-26 | Fuji Electric Co., Ltd. | Semiconductor device and method of manufacturing semiconductor device |
US10276653B2 (en) | 2015-10-16 | 2019-04-30 | Fuji Electric Co., Ltd. | Semiconductor device and method of manufacturing semiconductor device |
US10439060B2 (en) | 2017-06-16 | 2019-10-08 | Fuji Electric Co., Ltd. | Semiconductor device and method of manufacturing semiconductor device |
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Cited By (7)
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US10199493B2 (en) | 2015-10-16 | 2019-02-05 | Fuji Electric Co., Ltd. | Semiconductor device and method of manufacturing semiconductor device |
US10276653B2 (en) | 2015-10-16 | 2019-04-30 | Fuji Electric Co., Ltd. | Semiconductor device and method of manufacturing semiconductor device |
US10403713B2 (en) | 2015-10-16 | 2019-09-03 | Fuji Electric Co., Ltd. | Method of manufacturing semiconductor device |
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DE112016003509B4 (de) | 2015-10-16 | 2023-07-20 | Fuji Electric Co., Ltd. | Halbleitervorrichtung und Verfahren zur Herstellung einer Halbleitervorrichtung |
US10217858B2 (en) | 2015-11-16 | 2019-02-26 | Fuji Electric Co., Ltd. | Semiconductor device and method of manufacturing semiconductor device |
US10439060B2 (en) | 2017-06-16 | 2019-10-08 | Fuji Electric Co., Ltd. | Semiconductor device and method of manufacturing semiconductor device |
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CN102376751A (zh) | 2012-03-14 |
DE102011052473A1 (de) | 2012-02-16 |
CN102376751B (zh) | 2017-06-20 |
DE102011052473B4 (de) | 2018-11-29 |
JP2012044167A (ja) | 2012-03-01 |
US20120037920A1 (en) | 2012-02-16 |
US8525254B2 (en) | 2013-09-03 |
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