JP2011165902A - 半導体装置および半導体装置の製造方法 - Google Patents
半導体装置および半導体装置の製造方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 56
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000013078 crystal Substances 0.000 claims abstract description 19
- 239000012535 impurity Substances 0.000 claims description 37
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 36
- 229920005591 polysilicon Polymers 0.000 claims description 36
- 238000002513 implantation Methods 0.000 claims description 30
- 239000010410 layer Substances 0.000 description 145
- 229910010271 silicon carbide Inorganic materials 0.000 description 139
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 108
- 239000010408 film Substances 0.000 description 32
- 229910004298 SiO 2 Inorganic materials 0.000 description 14
- 239000000758 substrate Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 238000005468 ion implantation Methods 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 238000000137 annealing Methods 0.000 description 4
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- 238000002161 passivation Methods 0.000 description 4
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- 238000001953 recrystallisation Methods 0.000 description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 229910052796 boron Inorganic materials 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000000206 photolithography Methods 0.000 description 3
- 229920002120 photoresistant polymer Polymers 0.000 description 3
- 238000001020 plasma etching Methods 0.000 description 3
- 238000001039 wet etching Methods 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
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
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- 239000010703 silicon Substances 0.000 description 2
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
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- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000002230 thermal chemical vapour deposition Methods 0.000 description 1
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Abstract
【解決手段】六方晶構造を有するN型SiC層3と、N型SiC層3の主面に設けられたP型SiC領域4と、P型SiC領域4の表面上に設けられたP型導電層6と、を備え、P型SiC領域4のうちのP型導電層6に接する部分は、立方晶構造のSiCを含むことを特徴とする半導体装置が提供される。
【選択図】図1
Description
図1は、第1の実施形態に係る半導体装置の断面を示す模式図である。本実施形態では、N型SiC層に形成された、電力制御用のダイオード1を例として説明する。
図4は、第2の実施形態に係る半導体装置の断面を示す模式図である。本実施形態では、N型SiC層3に形成されたパワーMOSFET20を例として説明する。また、図4は、パワーMOSFET20のユニットセルの断面を模式的に示している。
図9は、第3の実施形態に係る半導体装置の断面を示す模式図である。本実施形態に係るパワーMOSFET30は、P型SiC層53に形成されたPMOS構造を有する点で、第2の実施形態に係るパワーMOSFET20と異なる。なお、本実施形態では、第1導電型をP型、第2導電型をN型として説明する。
図10は、第4の実施形態に係る半導体装置の断面を示す模式図である。本実施形態に係る半導体装置は、SiCを材料とするIGBT40(Insulated Gate Bipolar Transistor)である。
2 N型SiC基板
3 N型SiC層
5 再結晶領域
6、17、58 P型導電層
7 動作領域
10、50 SiCウェーハ
11 P型ベース領域
12 N型ソース領域
13 P型コンタクト領域
14 ゲート酸化膜
16、57 N型導電層
18 ゲート電極
19 ドレイン電極
23 ソース配線
24 ゲート配線
36 ポリシリコン層
37 ダメージ領域
53 P型SiC層
54 N型ベース領域
55 P型ソース領域
56 N型コンタクト領域
Claims (5)
- 六方晶構造を有する第1導電型のSiC層と、
前記SiC層の表面に形成された第2導電型のSiC領域と、
前記SiC領域の上に設けられた第2導電型の導電層と、
を備え、
前記SiC領域のうちの前記導電層に接する部分は、立方晶構造のSiCを含むことを特徴とする半導体装置。 - 六方晶構造を有する第1導電型のSiC層と、
前記SiC層の表面に設けられた第2導電型の第1半導体領域と、
前記第1半導体領域の表面に選択的に設けられた第1導電型の第2半導体領域と、
前記第2半導体領域に隣接して、前記第1半導体領域の表面に選択的に設けられた第2導電型の第3半導体領域と、
前記第2半導体領域の上に設けられた第1導電型の第1導電層と、
前記第3半導体領域の上に設けられた第2導電型の第2導電層と、
を備え、
前記第2半導体領域および前記第3半導体領域のうちのP型の導電型を有する領域は、前記第1または第2導電層に接する部分に立方晶構造のSiCを含むことを特徴とする半導体装置。 - 前記導電層は、ポリシリコン層であることを特徴とする請求項1記載の半導体装置。
- 前記第2半導体領域および前記第3半導体領域のうちのP型の導電型を有する前記領域に接する前記第1または第2導電層は、P型不純物がドープされたポリシリコン層であることを特徴とする請求項2記載の半導体装置。
- 六方晶構造を有するSiC層の表面に設けられたP型SiC領域の上に導電層を設ける工程と、
前記P型SiC領域と前記導電層とにP型不純物をイオン注入し、前記P型SiC領域のうちの前記導電層に接する部分に注入ダメージを形成する工程と、
前記P型SiC領域と前記導電層とを熱処理して、前記導電層に注入された前記P型不純物を活性化し、前記P型SiC領域のうちの前記導電層に接する部分に立方晶構造のSiCを形成する工程と、
を備えることを特徴とする半導体装置の製造方法。
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JP2010027121A JP5439215B2 (ja) | 2010-02-10 | 2010-02-10 | 半導体装置および半導体装置の製造方法 |
US13/021,400 US8558244B2 (en) | 2010-02-10 | 2011-02-04 | Semiconductor device and method for manufacturing semiconductor device |
US14/023,177 US8916881B2 (en) | 2010-02-10 | 2013-09-10 | Semiconductor device and method for manufacturing semiconductor device |
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JP2013183064A (ja) * | 2012-03-02 | 2013-09-12 | Toshiba Corp | 半導体装置の製造方法 |
JP2013232559A (ja) * | 2012-04-27 | 2013-11-14 | National Institute Of Advanced Industrial & Technology | 炭化珪素半導体装置の製造方法 |
JP2014096465A (ja) * | 2012-11-09 | 2014-05-22 | Fuji Electric Co Ltd | 炭化珪素mos型半導体装置の製造方法 |
US10229994B2 (en) | 2015-09-11 | 2019-03-12 | Kabushiki Kaisha Toshiba | Semiconductor device |
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JP2014096465A (ja) * | 2012-11-09 | 2014-05-22 | Fuji Electric Co Ltd | 炭化珪素mos型半導体装置の製造方法 |
US10229994B2 (en) | 2015-09-11 | 2019-03-12 | Kabushiki Kaisha Toshiba | Semiconductor device |
Also Published As
Publication number | Publication date |
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US20140014971A1 (en) | 2014-01-16 |
US8916881B2 (en) | 2014-12-23 |
JP5439215B2 (ja) | 2014-03-12 |
US8558244B2 (en) | 2013-10-15 |
US20110193101A1 (en) | 2011-08-11 |
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