JP6260605B2 - 半導体装置 - Google Patents
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- JP6260605B2 JP6260605B2 JP2015227049A JP2015227049A JP6260605B2 JP 6260605 B2 JP6260605 B2 JP 6260605B2 JP 2015227049 A JP2015227049 A JP 2015227049A JP 2015227049 A JP2015227049 A JP 2015227049A JP 6260605 B2 JP6260605 B2 JP 6260605B2
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- 239000004065 semiconductor Substances 0.000 title claims description 75
- 230000004888 barrier function Effects 0.000 claims description 45
- 239000000758 substrate Substances 0.000 claims description 37
- 239000012535 impurity Substances 0.000 claims description 25
- 239000010410 layer Substances 0.000 description 423
- 238000011084 recovery Methods 0.000 description 18
- 230000002093 peripheral effect Effects 0.000 description 13
- 230000005684 electric field Effects 0.000 description 10
- 230000004048 modification Effects 0.000 description 8
- 238000012986 modification Methods 0.000 description 8
- 239000011229 interlayer Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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- H01L29/7397—Vertical transistors, e.g. vertical IGBT with a non planar surface, e.g. with a non planar gate or with a trench or recess or pillar in the surface of the emitter, base or collector region for improving current density or short circuiting the emitter and base regions and a gate structure lying on a slanted or vertical surface or formed in a groove, e.g. trench gate IGBT
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
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- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
Description
12 :半導体基板
14 :周辺領域
15 :素子領域
16 :IGBT領域
18 :ダイオード領域
20 :エミッタ層
22 :上部ボディ層
24 :バリア層
26 :下部ボディ層
28 :ドリフト層
30 :カソード層
31 :第1コレクタ層
32 :端部p型層
34 :第2コレクタ層
41 :第1トレンチ
42 :第2トレンチ
43 :絶縁層
44 :トレンチ電極
45 :絶縁層
46 :トレンチ電極
48 :層間絶縁膜
60 :上部電極
62 :ゲート配線
64 :下部電極
70 :トレンチ間領域
Claims (5)
- 半導体装置であって、
上面に、複数の第1トレンチと、前記各第1トレンチと繋がっている第2トレンチを備える半導体基板と、
前記各第1トレンチの内面を覆っている第1絶縁層と、
前記第1トレンチ内に配置されており、前記第1絶縁層によって前記半導体基板から絶縁されているトレンチ電極と、
前記第2トレンチの内面を覆っている第2絶縁層と、
前記上面に配置されている上部電極と、
前記半導体基板の下面に配置されている下部電極、
を備えており、
前記半導体基板が、
前記上面から前記複数の第1トレンチの下端よりも深い位置まで伸びており、前記各第1トレンチの長手方向の端部を包含している端部p型層と、
前記第2トレンチを挟んで前記端部p型層の反対側に配置されており、隣接する前記第1トレンチの間に挟まれたトレンチ間領域に配置されており、前記上部電極に接している第1p型層と、
前記トレンチ間領域に配置されており、前記第1p型層の下側に配置されているn型のバリア層と、
前記トレンチ間領域に配置されており、前記バリア層の下側に配置されており、前記バリア層によって前記第1p型層から分離されている第2p型層と、
前記第2p型層の下側に配置されているn型のドリフト層と、
前記ドリフト層の下側に配置されており、前記下部電極に接しており、前記ドリフト層よりも高いn型不純物濃度を有するn型のカソード層、
を有しており、
前記第2トレンチによって、前記端部p型層が、前記第1p型層及び前記第2p型層から分離されている、
半導体装置。 - 前記半導体基板が、ダイオード領域とIGBT領域を備えており、
前記トレンチ間領域が複数個存在しており、
前記ダイオード領域と前記IGBT領域のそれぞれが、少なくとも1つの前記トレンチ間領域を有しており、
前記IGBT領域内の前記トレンチ間領域が、前記上部電極と前記第1絶縁層に接しており、前記第1p型層によって前記バリア層から分離されているn型のエミッタ層を有しており、
前記ダイオード領域内の前記トレンチ間領域が、前記エミッタ層を有しておらず、
前記カソード層が、前記ダイオード領域内に配置されており、
前記半導体基板が、前記IGBT領域内に配置されており、前記ドリフト層の下側に配置されており、前記下部電極に接しているp型の第1コレクタ層を有している、
請求項1の半導体装置。 - 前記ドリフト層の一部が、前記端部p型層の下側に配置されており、
前記半導体基板が、前記端部p型層の下部で前記ドリフト層の下側に配置されており、前記下部電極に接しているp型の第2コレクタ層を有しており、
前記カソード層と前記第2コレクタ層の境界が、前記第2トレンチの下部または前記ダイオード領域内に配置されている、
請求項2の半導体装置。 - 前記端部p型層が、前記第2トレンチの前記端部p型層側の側面に接している請求項1〜3のいずれか一項の半導体装置。
- 前記端部p型層のp型不純物濃度が、前記ドリフト層のn型不純物濃度よりも高い請求項1〜4のいずれか一項の半導体装置。
Priority Applications (3)
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JP2015227049A JP6260605B2 (ja) | 2015-11-19 | 2015-11-19 | 半導体装置 |
CN201611034190.4A CN106783849B (zh) | 2015-11-19 | 2016-11-16 | 半导体器件 |
US15/354,240 US9899374B2 (en) | 2015-11-19 | 2016-11-17 | Semiconductor device |
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JP2015227049A JP6260605B2 (ja) | 2015-11-19 | 2015-11-19 | 半導体装置 |
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JP2017098344A JP2017098344A (ja) | 2017-06-01 |
JP6260605B2 true JP6260605B2 (ja) | 2018-01-17 |
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JP (1) | JP6260605B2 (ja) |
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CN108417621A (zh) * | 2017-02-10 | 2018-08-17 | 中芯国际集成电路制造(上海)有限公司 | 绝缘栅双极型晶体管及其形成方法 |
JP6804379B2 (ja) * | 2017-04-24 | 2020-12-23 | 三菱電機株式会社 | 半導体装置 |
CN107623027B (zh) * | 2017-10-20 | 2020-03-31 | 电子科技大学 | 一种沟槽栅电荷储存型绝缘栅双极型晶体管及其制造方法 |
JP6626929B1 (ja) * | 2018-06-29 | 2019-12-25 | 京セラ株式会社 | 半導体デバイス及び電気装置 |
JP7486373B2 (ja) * | 2020-07-29 | 2024-05-17 | 三菱電機株式会社 | 半導体装置 |
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JP3257394B2 (ja) * | 1996-04-04 | 2002-02-18 | 株式会社日立製作所 | 電圧駆動型半導体装置 |
KR100334445B1 (ko) * | 1997-08-29 | 2002-05-04 | 다니구찌 이찌로오, 기타오카 다카시 | 절연 게이트형 반도체장치와 그 제조방법 |
JP4852188B2 (ja) * | 1999-12-06 | 2012-01-11 | 株式会社豊田中央研究所 | 半導体装置 |
CN100521207C (zh) * | 2006-01-10 | 2009-07-29 | 株式会社电装 | 具有igbt和二极管的半导体器件 |
JP5223291B2 (ja) * | 2007-10-24 | 2013-06-26 | 富士電機株式会社 | 半導体装置の製造方法 |
JP5261137B2 (ja) * | 2008-11-04 | 2013-08-14 | 株式会社豊田中央研究所 | バイポーラ型半導体装置 |
JP5582102B2 (ja) | 2010-07-01 | 2014-09-03 | 株式会社デンソー | 半導体装置 |
JP5886548B2 (ja) | 2011-07-11 | 2016-03-16 | 株式会社豊田中央研究所 | 半導体装置 |
JP2013026534A (ja) * | 2011-07-25 | 2013-02-04 | Toyota Central R&D Labs Inc | 半導体装置 |
JP6022774B2 (ja) * | 2012-01-24 | 2016-11-09 | トヨタ自動車株式会社 | 半導体装置 |
JP5981859B2 (ja) | 2013-02-15 | 2016-08-31 | 株式会社豊田中央研究所 | ダイオード及びダイオードを内蔵する半導体装置 |
JP5989689B2 (ja) | 2014-01-27 | 2016-09-07 | トヨタ自動車株式会社 | 半導体装置 |
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US9899374B2 (en) | 2018-02-20 |
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CN106783849B (zh) | 2019-07-02 |
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