JP7114901B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP7114901B2 JP7114901B2 JP2018002852A JP2018002852A JP7114901B2 JP 7114901 B2 JP7114901 B2 JP 7114901B2 JP 2018002852 A JP2018002852 A JP 2018002852A JP 2018002852 A JP2018002852 A JP 2018002852A JP 7114901 B2 JP7114901 B2 JP 7114901B2
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- 239000004065 semiconductor Substances 0.000 title claims description 103
- 239000000758 substrate Substances 0.000 claims description 69
- 210000000746 body region Anatomy 0.000 claims description 24
- 239000012535 impurity Substances 0.000 claims description 17
- 230000004048 modification Effects 0.000 description 17
- 238000012986 modification Methods 0.000 description 17
- 239000000969 carrier Substances 0.000 description 11
- 230000007423 decrease Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000011229 interlayer Substances 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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Description
アノード領域32は、ゲートトレンチ40に接する範囲に設けられている。アノード領域32は、p型(第1導電型の一例)の領域である。アノード領域32は、上側領域322と下側領域324を備えている。上側領域322は、半導体基板12の表面121に露出する範囲に設けられている。上側領域322は、表面電極62とオーミック接触している。下側領域324は、上側領域322の下に設けられている。下側領域324は、上側領域322とダイオードドリフト領域26aの間に設けられている。下側領域324の不純物濃度は、上側領域322の不純物濃度より低い。
エミッタ領域20は、半導体基板12の表面121に露出する範囲に島状に設けられている。エミッタ領域20は、ゲートトレンチ40に接する範囲に設けられている。エミッタ領域20は、n型の領域である。エミッタ領域20は、表面電極62とオーミック接触している。
変形例について説明する。図3に示すように、変形例1に係る半導体装置10では、各低濃度領域34の各横方向接触部60(第2接触部の一例)が、半導体基板12に垂直な方向(Z方向)に平行に延びている。図3に示す断面において、各低濃度領域34は、長方形に形成されている。
図4に示すように、変形例2に係る半導体装置10では、各低濃度領域34の各横方向接触部60が湾曲している。各低濃度領域34の各横方向接触部60は、コレクタ領域31側に凸となるように湾曲している。
図5に示すように、変形例3に係る半導体装置10では、各低濃度領域34の各横方向接触部60が、各低濃度領域34側に凸となるように湾曲している。
図6に示すように、変形例4に係る半導体装置10では、コレクタ領域31側に凸となるように屈曲している。
図7に示すように、変形例5に係る半導体装置10では、各低濃度領域34の各横方向接触部60が、階段状に形成されている。
12 :半導体基板
16 :IGBT領域
18 :ダイオード領域
20 :エミッタ領域
22 :ボディコンタクト領域
24 :ボディ領域
26a :ダイオードドリフト領域
26b :IGBTドリフト領域
28a :ダイオードバッファ領域
28b :IGBTバッファ領域
30 :カソード領域
31 :コレクタ領域
32 :アノード領域
34 :低濃度領域
40 :ゲートトレンチ
42 :ゲート絶縁膜
44 :ゲート電極
46 :層間絶縁膜
50 :縦方向接触部
60 :横方向接触部
62 :表面電極
64 :裏面電極
121 :表面
122 :裏面
322 :上側領域
324 :下側領域
Claims (4)
- 半導体基板と、
前記半導体基板の表面に配置されている表面電極と、
前記半導体基板の裏面に配置されている裏面電極と、を備えており、
前記半導体基板は、
ダイオード領域と、
前記ダイオード領域の隣に設けられているIGBT領域と、を備えており、
前記ダイオード領域は、
前記半導体基板の表面に露出する範囲に設けられている第1導電型のアノード領域と、
前記半導体基板の裏面に露出する範囲に設けられている第2導電型のカソード領域と、
前記アノード領域と前記カソード領域の間に設けられている第2導電型のダイオードドリフト領域と、を備えており、
前記IGBT領域は、
前記半導体基板の表面に露出する範囲に設けられている第2導電型のエミッタ領域と、
前記半導体基板の裏面に露出する範囲に設けられている第1導電型のコレクタ領域と、
前記エミッタ領域と前記コレクタ領域の間に設けられており、前記ダイオードドリフト領域の隣に設けられている第2導電型のIGBTドリフト領域と、
前記エミッタ領域と前記IGBTドリフト領域の間に設けられている第1導電型のボディ領域と、
前記半導体基板の表面から前記エミッタ領域と前記ボディ領域を貫通して前記IGBTドリフト領域に達する深さまで延びているゲートトレンチと、
前記IGBTドリフト領域と前記コレクタ領域の間に設けられており、前記IGBTドリフト領域より不純物濃度が高い第2導電型のバッファ領域と、
前記バッファ領域と前記コレクタ領域との間に設けられており、前記半導体基板に平行な方向に間隔をあけて並んでおり、前記コレクタ領域より不純物濃度が低い複数の第1導電型の低濃度領域と、を備えており、
前記ゲートトレンチの内部にはゲート電極が配置されており、
前記コレクタ領域は、隣り合っている前記低濃度領域と前記低濃度領域との間で前記バッファ領域に接触している第1接触部を備えており、
各前記低濃度領域は、前記ダイオード領域と前記IGBT領域が隣り合っている方向において前記コレクタ領域に接触している第2接触部を備えている、半導体装置。 - 前記コレクタ領域は、前記ダイオード領域と前記IGBT領域が隣り合っている方向において前記カソード領域に接触している、請求項1に記載の半導体装置。
- 前記半導体基板に垂直な方向かつ複数の前記低濃度領域が並んでいる方向に沿って切断した前記半導体基板の断面を視たときに、複数の前記低濃度領域の面積の合計が、前記コレクタ領域の面積より広い、請求項1または2に記載の半導体装置。
- 各前記低濃度領域の各前記第2接触部は、前記半導体基板に垂直な方向に平行に延びている、請求項1から3のいずれか一項に記載の半導体装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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JP2018002852A JP7114901B2 (ja) | 2018-01-11 | 2018-01-11 | 半導体装置 |
US16/237,764 US10600782B2 (en) | 2018-01-11 | 2019-01-02 | Semiconductor device |
DE102019100386.5A DE102019100386A1 (de) | 2018-01-11 | 2019-01-09 | Halbleitervorrichtung |
CN201910023830.9A CN110034185B (zh) | 2018-01-11 | 2019-01-10 | 半导体装置 |
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JP2018002852A JP7114901B2 (ja) | 2018-01-11 | 2018-01-11 | 半導体装置 |
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JP2019125595A JP2019125595A (ja) | 2019-07-25 |
JP7114901B2 true JP7114901B2 (ja) | 2022-08-09 |
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US (1) | US10600782B2 (ja) |
JP (1) | JP7114901B2 (ja) |
CN (1) | CN110034185B (ja) |
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JP7297709B2 (ja) | 2020-03-19 | 2023-06-26 | 株式会社東芝 | 半導体装置及び半導体回路 |
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JP2009218543A (ja) * | 2008-02-15 | 2009-09-24 | Toshiba Corp | 半導体装置 |
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CN101887913B (zh) * | 2010-06-04 | 2013-01-02 | 无锡新洁能功率半导体有限公司 | 一种具有改善型集电极结构的igbt |
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JP5724887B2 (ja) * | 2012-01-16 | 2015-05-27 | トヨタ自動車株式会社 | 半導体装置 |
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JP2015008235A (ja) * | 2013-06-25 | 2015-01-15 | 富士電機株式会社 | 半導体装置の製造方法 |
JP6277814B2 (ja) * | 2014-03-25 | 2018-02-14 | 株式会社デンソー | 半導体装置 |
JP6181597B2 (ja) * | 2014-04-28 | 2017-08-16 | トヨタ自動車株式会社 | 半導体装置及び半導体装置の製造方法 |
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JP2002305305A (ja) | 2001-01-31 | 2002-10-18 | Toshiba Corp | 半導体装置 |
JP2004363477A (ja) | 2003-06-06 | 2004-12-24 | Sanken Electric Co Ltd | 絶縁ゲート型半導体装置 |
US20100156506A1 (en) | 2008-12-24 | 2010-06-24 | Denso Corporation | Semiconductor device including insulated gate bipolar transistor and diode |
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US20190214383A1 (en) | 2019-07-11 |
DE102019100386A1 (de) | 2019-07-11 |
CN110034185B (zh) | 2022-06-14 |
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