JP7151446B2 - 半導体装置の製造方法 - Google Patents
半導体装置の製造方法 Download PDFInfo
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- JP7151446B2 JP7151446B2 JP2018232925A JP2018232925A JP7151446B2 JP 7151446 B2 JP7151446 B2 JP 7151446B2 JP 2018232925 A JP2018232925 A JP 2018232925A JP 2018232925 A JP2018232925 A JP 2018232925A JP 7151446 B2 JP7151446 B2 JP 7151446B2
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- trench
- semiconductor substrate
- semiconductor device
- protective film
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- 239000004065 semiconductor Substances 0.000 title claims description 87
- 238000004519 manufacturing process Methods 0.000 title claims description 21
- 239000000758 substrate Substances 0.000 claims description 55
- 210000000746 body region Anatomy 0.000 claims description 43
- 230000001681 protective effect Effects 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 27
- 238000000137 annealing Methods 0.000 claims description 13
- 239000011261 inert gas Substances 0.000 claims description 2
- 230000005684 electric field Effects 0.000 description 12
- 238000005468 ion implantation Methods 0.000 description 11
- 239000012535 impurity Substances 0.000 description 9
- 239000002344 surface layer Substances 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- -1 nitrogen ions Chemical class 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001312 dry etching Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000002230 thermal chemical vapour deposition Methods 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
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- Electrodes Of Semiconductors (AREA)
Description
10 :半導体基板
11 :ドレイン領域
12 :ドリフト領域
13 :電界緩和領域
14 :JFET抵抗低減領域
15 :ボディ領域
16 :ボディコンタクト領域
17 :ソース領域
22 :ドレイン電極
24 :ソース電極
30 :トレンチゲート
30a :肩部
32 :ゲート絶縁膜
34 :ゲート電極
Claims (1)
- 第1導電型のドリフト領域と第2導電型のボディ領域と第1導電型のソース領域が半導体基板の深さ方向に沿ってこの順で並んでいる前記半導体基板の表面から前記ソース領域と前記ボディ領域を貫通して前記深さ方向に伸びるトレンチを形成する工程と、
前記トレンチの側面に露出する前記ボディ領域の少なくとも一部を被覆するとともに、前記トレンチの肩部を露出させるように、前記トレンチ内に保護膜を成膜する工程と、
前記トレンチの側面が前記保護膜で被覆された状態で不活性ガス雰囲気下のアニール処理を実施し、前記保護膜から露出する前記トレンチの前記肩部を溶融させて曲面化する工程と、を備える、半導体装置の製造方法。
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JP2018232925A JP7151446B2 (ja) | 2018-12-12 | 2018-12-12 | 半導体装置の製造方法 |
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JP2018232925A JP7151446B2 (ja) | 2018-12-12 | 2018-12-12 | 半導体装置の製造方法 |
Publications (2)
Publication Number | Publication Date |
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JP2020096084A JP2020096084A (ja) | 2020-06-18 |
JP7151446B2 true JP7151446B2 (ja) | 2022-10-12 |
Family
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JP2018232925A Active JP7151446B2 (ja) | 2018-12-12 | 2018-12-12 | 半導体装置の製造方法 |
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JP (1) | JP7151446B2 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7588342B2 (ja) | 2020-12-11 | 2024-11-22 | 株式会社東芝 | 半導体装置、インバータ回路、駆動装置、車両、及び、昇降機 |
JP7513565B2 (ja) | 2021-04-14 | 2024-07-09 | 株式会社デンソー | スイッチング素子の製造方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002061845A1 (fr) | 2001-02-01 | 2002-08-08 | Mitsubishi Denki Kabushiki Kaisha | Dispositif a semi-conducteur et son procede de fabrication |
JP2004140039A (ja) | 2002-10-15 | 2004-05-13 | Fuji Electric Device Technology Co Ltd | 半導体装置の製造方法 |
JP2005333112A (ja) | 2004-04-21 | 2005-12-02 | Denso Corp | 半導体装置及びその製造方法 |
JP2016082096A (ja) | 2014-10-17 | 2016-05-16 | トヨタ自動車株式会社 | 絶縁ゲート型スイッチング素子と、その製造方法 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP3396553B2 (ja) * | 1994-02-04 | 2003-04-14 | 三菱電機株式会社 | 半導体装置の製造方法及び半導体装置 |
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2018
- 2018-12-12 JP JP2018232925A patent/JP7151446B2/ja active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002061845A1 (fr) | 2001-02-01 | 2002-08-08 | Mitsubishi Denki Kabushiki Kaisha | Dispositif a semi-conducteur et son procede de fabrication |
JP2004140039A (ja) | 2002-10-15 | 2004-05-13 | Fuji Electric Device Technology Co Ltd | 半導体装置の製造方法 |
JP2005333112A (ja) | 2004-04-21 | 2005-12-02 | Denso Corp | 半導体装置及びその製造方法 |
JP2016082096A (ja) | 2014-10-17 | 2016-05-16 | トヨタ自動車株式会社 | 絶縁ゲート型スイッチング素子と、その製造方法 |
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JP2020096084A (ja) | 2020-06-18 |
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