JP5488687B2 - 半導体装置およびその製造方法 - Google Patents
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- 239000004065 semiconductor Substances 0.000 title claims description 122
- 238000004519 manufacturing process Methods 0.000 title claims description 35
- 239000000463 material Substances 0.000 claims description 50
- 239000000758 substrate Substances 0.000 claims description 46
- 239000011800 void material Substances 0.000 claims description 36
- 239000013078 crystal Substances 0.000 claims description 16
- 230000007547 defect Effects 0.000 claims description 16
- 239000012535 impurity Substances 0.000 claims description 5
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 34
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 29
- 229920005591 polysilicon Polymers 0.000 description 29
- 238000010586 diagram Methods 0.000 description 13
- 238000010438 heat treatment Methods 0.000 description 9
- 238000005530 etching Methods 0.000 description 8
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 230000001678 irradiating effect Effects 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- 229910052814 silicon oxide Inorganic materials 0.000 description 5
- 238000010301 surface-oxidation reaction Methods 0.000 description 4
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 description 4
- 229910052581 Si3N4 Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 2
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- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
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- 230000015572 biosynthetic process Effects 0.000 description 1
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- 230000001771 impaired effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000001020 plasma etching Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- H01L29/7393—Insulated gate bipolar mode transistors, i.e. IGBT; IGT; COMFET
- H01L29/7395—Vertical transistors, e.g. vertical IGBT
- H01L29/7396—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
- 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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- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
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Description
図1に示す半導体装置10は、IGBTとダイオードが同一の半導体基板100に形成されたRC−IGBTである。
半導体装置10の製造方法について、絶縁ゲート130およびダミーゲート140の製造工程を中心に説明する。既に説明したとおり、第1層143の材料となる第1材料はポリシリコンであり、第2層144の材料となる第2材料は、第1材料の酸化物であるシリコン酸化物である。
ダイオードトレンチ内に形成される、ボイドを有する状態の第1層の形態は、図4等に示すトレンチ541に限られない。例えば、図9に示すように、接触面632aを有するが、離間面を有さないポリシリコン層630aがトレンチ541の内部に形成されるように設計してもよい。ポリシリコン層630aに表面酸化処理を行うことによって接触面632aの表面に酸化膜が形成され、図6および7と同様に、酸化膜が生成する際の応力によって結晶欠陥領域が形成される。
Claims (4)
- ダイオード領域とIGBT領域が同一半導体基板に形成されている半導体装置であって、
ダイオード領域は、
半導体基板の表面に露出している第1導電型のアノード層と、
アノード層の裏面側に形成されている第1導電型のダイオードボディ層と、
ダイオードボディ層の裏面側に形成されている第2導電型のダイオードドリフト層と、
ダイオードドリフト層の裏面側に形成されており、ダイオードドリフト層より第2導電型の不純物濃度が高い、第2導電型のカソード層と、
半導体基板の表面側からダイオードドリフト層に達するダイオードトレンチ内に埋め込まれた第1層と、
第1層内に埋設されており、その下端がダイオードボディ層とダイオードドリフト層との境界よりも深い深さに位置している第2層と、
を備えており、
IGBT領域は、
半導体基板の表面に露出している第2導電型のエミッタ層と、
エミッタ層の側方および裏面側に形成されており、その一部が半導体基板の表面に露出している第1導電型のIGBTボディ層と、
IGBTボディ層の裏面側に形成されている第2導電型のIGBTドリフト層と、
IGBTドリフト層の裏面側に形成されている第1導電型のコレクタ層と、
半導体基板の表面側からIGBTボディ層を貫通し、IGBTドリフト層に達するIGBTゲートと、
を備えており、
第2層は、第1層をダイオードトレンチの内側から外側に向かって押圧しており、
ダイオードドリフト層には、少なくとも第2層の下端の深さにライフタイム制御領域が形成されており、
ライフタイム制御領域内の結晶欠陥密度は、ライフタイム制御領域外の結晶欠陥密度よりも高い、
半導体装置。 - 第2層の材料となる第2材料は、第1層の材料となる第1材料の酸化物である、請求項1に記載の半導体装置。
- 請求項1または2に記載の半導体装置の製造方法であって、
ダイオードトレンチ内に、ボイドを有する状態で第1層の材料となる第1材料を充填する工程と、
充填された第1材料のボイド内に、第2層の材料となる第2材料を充填するとともに膨張させる工程とを含む、製造方法。 - 第2材料は、第1材料の酸化物であり、
膨張させる工程では、充填する工程でボイドを有する状態でダイオードトレンチ内に充填された第1材料のボイドに面する部分を酸化した酸化物を第2材料としてボイド内に充填するとともに膨張させる、請求項3に記載の製造方法。
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PCT/JP2011/072273 WO2013046377A1 (ja) | 2011-09-28 | 2011-09-28 | 半導体装置およびその製造方法 |
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JP5488687B2 true JP5488687B2 (ja) | 2014-05-14 |
JPWO2013046377A1 JPWO2013046377A1 (ja) | 2015-03-26 |
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US (1) | US8659052B2 (ja) |
JP (1) | JP5488687B2 (ja) |
CN (1) | CN103125023B (ja) |
DE (1) | DE112011105681B4 (ja) |
WO (1) | WO2013046377A1 (ja) |
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JP5937413B2 (ja) * | 2011-06-15 | 2016-06-22 | 株式会社デンソー | 半導体装置 |
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WO2021161668A1 (ja) * | 2020-02-12 | 2021-08-19 | 富士電機株式会社 | 半導体装置およびその製造方法 |
JP7459666B2 (ja) * | 2020-06-04 | 2024-04-02 | 三菱電機株式会社 | 半導体装置 |
JP2022144504A (ja) * | 2021-03-19 | 2022-10-03 | 株式会社東芝 | 半導体装置及びその製造方法 |
JP2024075220A (ja) * | 2022-11-22 | 2024-06-03 | 株式会社 日立パワーデバイス | 半導体装置 |
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2011
- 2011-09-28 WO PCT/JP2011/072273 patent/WO2013046377A1/ja active Application Filing
- 2011-09-28 CN CN201180041733.4A patent/CN103125023B/zh not_active Expired - Fee Related
- 2011-09-28 DE DE112011105681.8T patent/DE112011105681B4/de not_active Expired - Fee Related
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JPH01238026A (ja) * | 1988-03-17 | 1989-09-22 | Mitsubishi Electric Corp | 半導体装置の製造方法 |
JPH07201842A (ja) * | 1993-12-28 | 1995-08-04 | Nippon Steel Corp | 半導体装置の製造方法 |
JPH11266010A (ja) * | 1998-03-17 | 1999-09-28 | Toshiba Corp | 絶縁ゲート型半導体装置及びその製造方法 |
US6274460B1 (en) * | 1998-05-21 | 2001-08-14 | Intersil Corporation | Defect gettering by induced stress |
JP2008192737A (ja) * | 2007-02-02 | 2008-08-21 | Denso Corp | 半導体装置 |
JP2009141005A (ja) * | 2007-12-04 | 2009-06-25 | Rohm Co Ltd | 半導体装置およびその製造方法 |
JP2010263149A (ja) * | 2009-05-11 | 2010-11-18 | Toyota Motor Corp | 半導体装置 |
JP2011166052A (ja) * | 2010-02-15 | 2011-08-25 | Toyota Central R&D Labs Inc | 半導体素子とその半導体素子を備えた電力変換装置 |
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US20130075784A1 (en) | 2013-03-28 |
CN103125023B (zh) | 2016-05-25 |
DE112011105681T5 (de) | 2014-07-10 |
WO2013046377A1 (ja) | 2013-04-04 |
JPWO2013046377A1 (ja) | 2015-03-26 |
US8659052B2 (en) | 2014-02-25 |
DE112011105681B4 (de) | 2015-10-15 |
CN103125023A (zh) | 2013-05-29 |
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