JP6493372B2 - 半導体装置 - Google Patents
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- JP6493372B2 JP6493372B2 JP2016237928A JP2016237928A JP6493372B2 JP 6493372 B2 JP6493372 B2 JP 6493372B2 JP 2016237928 A JP2016237928 A JP 2016237928A JP 2016237928 A JP2016237928 A JP 2016237928A JP 6493372 B2 JP6493372 B2 JP 6493372B2
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- 239000004065 semiconductor Substances 0.000 title claims description 117
- 210000000746 body region Anatomy 0.000 claims description 67
- 239000000758 substrate Substances 0.000 claims description 42
- 239000012535 impurity Substances 0.000 claims description 31
- 150000001875 compounds Chemical class 0.000 claims description 14
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 46
- 229910010271 silicon carbide Inorganic materials 0.000 description 45
- 239000010410 layer Substances 0.000 description 42
- 238000004519 manufacturing process Methods 0.000 description 13
- 230000007423 decrease Effects 0.000 description 11
- 230000005684 electric field Effects 0.000 description 10
- 239000011229 interlayer Substances 0.000 description 9
- 238000005530 etching Methods 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001312 dry etching Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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Description
本明細書または図面に説明した技術要素は、単独であるいは各種の組合せによって技術的有用性を発揮するものであり、出願時請求項記載の組合せに限定されるものではない。また、本明細書または図面に例示した技術は複数目的を同時に達成するものであり、そのうちの一つの目的を達成すること自体で技術的有用性を持つものである。
2:化合物半導体基板
12:ゲート領域
14:アクティブ領域
22:トレンチ
24:ゲート絶縁膜
28:層間絶縁膜
30:ソース領域
32:ボディ領域
32a:高濃度領域
32b:低濃度領域
34:第1ドリフト領域
35:ドリフト領域
36:ドレイン領域
36a:高濃度領域
36b:低濃度領域
40:第1ゲート領域
42:第2ゲート領域
44:第3ゲート領域
46:第4ゲート領域
70:ソース電極
80:ドレイン電極
Claims (5)
- ゲート領域とアクティブ領域を備える化合物半導体基板と、
前記化合物半導体基板の上面に設けられており、前記ゲート領域と前記アクティブ領域に挟まれた範囲に設けられているトレンチと、
前記トレンチ内に配置されているゲート絶縁膜と、
前記アクティブ領域の上面に設けられたソース電極と、
前記化合物半導体基板の下面に設けられたドレイン電極と、
前記ゲート領域の上面に設けられたゲート配線、
を備えており、
前記ゲート領域は、
前記ゲート絶縁膜に接しており、前記ゲート配線に接続されているp型の第1ゲート領域と、
前記第1ゲート領域の下側で前記ゲート絶縁膜に接しており、前記第1ゲート領域のp型不純物濃度より低いp型不純物濃度を有するp型の第2ゲート領域と、
前記第2ゲート領域の下側で前記ゲート絶縁膜に接しているn型の第3ゲート領域と、
前記第3ゲート領域の下側で前記ゲート絶縁膜に接しており、前記ドレイン電極に接しているp型の第4ゲート領域、
を備えており、
前記アクティブ領域は、
前記ソース電極と前記ゲート絶縁膜に接しているn型のソース領域と、
前記ソース電極に接しており、前記ソース領域の下側で前記ゲート絶縁膜に接しており、前記ゲート絶縁膜を介して前記第2ゲート領域に対向しているp型のボディ領域と、
前記ボディ領域の下側で前記ゲート絶縁膜に接しており、前記ドレイン電極に接しているn型のドレイン領域、
を備えている、半導体装置。 - 前記ゲート絶縁膜に接する範囲における前記ボディ領域の上端が、前記ゲート絶縁膜に接する範囲における前記第2ゲート領域の上端と同じ深さまたはそれよりも上側に位置している、請求項1に記載の半導体装置。
- 前記ゲート絶縁膜に接する範囲における前記ボディ領域の下端が、前記ゲート絶縁膜に接する範囲における前記第2ゲート領域の下端よりも上側に位置している、請求項1または2に記載の半導体装置。
- 前記ドレイン領域は、
前記ボディ領域に接しており、前記ゲート絶縁膜を介して前記第2ゲート領域に対向している低濃度領域と、
前記低濃度領域の下側で前記ゲート絶縁膜に接しており、前記ドレイン電極に接しており、前記低濃度領域の不純物濃度よりも高い不純物濃度を有する高濃度領域を備えている、請求項1〜3のいずれかに記載の半導体装置。 - 前記アクティブ領域は、
前記低濃度領域と前記高濃度領域に接しており、前記低濃度領域の下側であって前記高濃度領域の上側で前記ゲート絶縁膜に接しており、前記低濃度領域によって前記ボディ領域から分離されており、前記ゲート絶縁膜を介して前記第2ゲート領域に対向しているp型のドリフト領域をさらに備えている、請求項4に記載の半導体装置。
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JP2016237928A JP6493372B2 (ja) | 2016-12-07 | 2016-12-07 | 半導体装置 |
US15/792,325 US10361267B2 (en) | 2016-12-07 | 2017-10-24 | Semiconductor device |
DE102017221950.5A DE102017221950B4 (de) | 2016-12-07 | 2017-12-05 | Halbleitervorrichtung |
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JP2016237928A JP6493372B2 (ja) | 2016-12-07 | 2016-12-07 | 半導体装置 |
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JP6493372B2 true JP6493372B2 (ja) | 2019-04-03 |
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JP (1) | JP6493372B2 (ja) |
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JP6560142B2 (ja) * | 2016-02-26 | 2019-08-14 | トヨタ自動車株式会社 | スイッチング素子 |
US20210335607A1 (en) * | 2020-04-22 | 2021-10-28 | X-FAB Texas, Inc. | Method for manufacturing a silicon carbide device |
DE102021125271A1 (de) | 2021-09-29 | 2023-03-30 | Infineon Technologies Ag | LeistungshalbleitervorrichtungVerfahren zur Herstellung einer Leistungshalbleitervorrichtung |
CN117133791B (zh) * | 2023-10-26 | 2024-01-26 | 江苏应能微电子股份有限公司 | 一种自适应超结沟槽式mosfet器件及其制备方法 |
CN117558762A (zh) * | 2024-01-12 | 2024-02-13 | 深圳天狼芯半导体有限公司 | 一种沟槽型mosfet及制备方法 |
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JP3400025B2 (ja) * | 1993-06-30 | 2003-04-28 | 株式会社東芝 | 高耐圧半導体素子 |
JP3257358B2 (ja) * | 1994-08-01 | 2002-02-18 | トヨタ自動車株式会社 | 電界効果型半導体装置 |
US8110868B2 (en) | 2005-07-27 | 2012-02-07 | Infineon Technologies Austria Ag | Power semiconductor component with a low on-state resistance |
JP2008270492A (ja) * | 2007-04-19 | 2008-11-06 | Sanyo Electric Co Ltd | 絶縁ゲート型半導体装置 |
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KR101388706B1 (ko) * | 2012-08-30 | 2014-04-24 | 삼성전기주식회사 | 전력 반도체 소자 및 그 제조방법 |
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JP6742214B2 (ja) | 2016-10-04 | 2020-08-19 | 株式会社ディスコ | 静電チャックプレートの給電装置 |
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