JP2017055026A - 半導体装置 - Google Patents
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 66
- 239000012535 impurity Substances 0.000 claims abstract description 96
- 230000007547 defect Effects 0.000 claims description 24
- 239000013078 crystal Substances 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 229910010271 silicon carbide Inorganic materials 0.000 description 126
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 123
- 239000010410 layer Substances 0.000 description 51
- 230000005684 electric field Effects 0.000 description 22
- 230000015556 catabolic process Effects 0.000 description 16
- 230000009471 action Effects 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000001004 secondary ion mass spectrometry Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000002040 relaxant effect Effects 0.000 description 3
- 238000004645 scanning capacitance microscopy Methods 0.000 description 3
- 238000004630 atomic force microscopy Methods 0.000 description 2
- 210000000746 body region Anatomy 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 238000005468 ion implantation Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910021334 nickel silicide Inorganic materials 0.000 description 1
- RUFLMLWJRZAWLJ-UHFFFAOYSA-N nickel silicide Chemical compound [Ni]=[Si]=[Ni] RUFLMLWJRZAWLJ-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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Abstract
Description
本実施形態の半導体装置は、第1の面と第2の面とを有するSiC層と、第1の面に接する第1の電極と、SiC層内に設けられた第1導電型の第1のSiC領域と、少なくとも一部が第1の電極と第1の面とが接する領域を囲んでSiC層内に設けられ、第1のSiC領域と第1の面との間に設けられた第2導電型の第2のSiC領域と、第2のSiC領域を囲んでSiC層内に設けられ、第1のSiC領域と第1の面との間に設けられ、第2のSiC領域よりも第2導電型の不純物濃度の低い第2導電型の第3のSiC領域と、第2のSiC領域と第3のSiC領域との間のSiC層内に設けられ、第2のSiC領域よりも第2導電型の不純物濃度の高い第2導電型の第4のSiC領域と、を備える。
本実施形態の半導体装置は、p++型の第1の高濃度領域(第4のSiC領域)30がp++型のコンタクト領域を兼ねる点で、第1の実施形態と異なっている。以下、第1の実施形態と重複する内容については一部記述を省略する。
本実施形態の半導体装置は、第4のSiC領域の第1の面を基準とする深さが、第2のSiC領域及び第3のSiC領域の第1の面を基準とする深さ以上である点で、第1の実施形態と異なっている。以下、第1の実施形態と重複する内容については一部記述を省略する。
本実施形態の半導体装置は、第3のSiC領域と第5のSiC領域との間に、第2の高濃度領域が設けられる点で、第1の実施形態と異なっている。以下、第1の実施形態と重複する内容については一部記述を省略する。
本実施形態の半導体装置は、第4のSiC領域の第1の面における形状が、環状ではなく、島状である点で、第1の実施形態と異なっている。以下、第1の実施形態と重複する内容については一部記述を省略する。
本実施形態の半導体装置は、SiC層の第1の面と第1のSiC領域との間に、p型のアノード領域を備えるPINダイオードである点で、第1の実施形態と異なっている。以下、第1の実施形態と重複する内容については一部記述を省略する。
本実施形態の半導体装置は、MOSFETである点で、第1の実施形態と異なっている。以下、第1の実施形態と重複する内容については一部記述を省略する。
本実施形態の半導体装置は、第1の面と第2の面とを有するSiC層と、第1の面に接する第1の電極と、SiC層内に設けられた第1導電型の第1のSiC領域と、少なくとも一部が第1の電極と第1の面とが接する領域を囲んでSiC層内に設けられ、第1のSiC領域と第1の面との間に設けられた第2導電型の第2のSiC領域と、第2のSiC領域を囲んでSiC層内に設けられ、第1のSiC領域と第1の面との間に設けられ、第2のSiC領域よりも第2導電型の不純物濃度の低い第2導電型の第3のSiC領域と、第2のSiC領域と第3のSiC領域との間のSiC層内に設けられ、第2のSiC領域及び第3のSiC領域よりも結晶欠陥密度の高い第4のSiC領域と、を備える。本実施形態の半導体装置は、第4のSiC領域が結晶欠陥密度の高い領域である点で、第1の実施形態と異なっている。以下、第1の実施形態と重複する内容については一部記述を省略する。
12 アノード電極(第1の電極)
13 ソース電極(第1の電極)
14 カソード電極(第2の電極)
15 ドレイン電極(第2の電極)
20 n−型のドリフト領域(第1のSiC領域)
22 p+型のエッジ領域(第2のSiC領域)
24 p型の第1のリサーフ領域(第3のSiC領域)
26 p−型の第2のリサーフ領域(第5のSiC領域)
30 p++型の第1の高濃度領域(第4のSiC領域)
40 領域
60 高欠陥密度領域(第4のSiC領域)
100 SBD(半導体装置)
200 SBD(半導体装置)
300 SBD(半導体装置)
400 SBD(半導体装置)
500 SBD(半導体装置)
600 PINダイオード(半導体装置)
700 MOSFET(半導体装置)
800 SBD(半導体装置)
Claims (13)
- 第1の面と第2の面とを有するSiC層と、
前記第1の面に接する第1の電極と、
前記SiC層内に設けられた第1導電型の第1のSiC領域と、
少なくとも一部が前記第1の電極と前記第1の面とが接する領域を囲んで前記SiC層内に設けられ、前記第1のSiC領域と前記第1の面との間に設けられた第2導電型の第2のSiC領域と、
前記第2のSiC領域を囲んで前記SiC層内に設けられ、前記第1のSiC領域と前記第1の面との間に設けられ、前記第2のSiC領域よりも第2導電型の不純物濃度の低い第2導電型の第3のSiC領域と、
前記第2のSiC領域と前記第3のSiC領域との間の前記SiC層内に設けられ、前記第2のSiC領域よりも第2導電型の不純物濃度の高い第2導電型の第4のSiC領域と、
を備える半導体装置。 - 前記第2の面に設けられた第2の電極を、更に備える請求項1記載の半導体装置。
- 前記第1の電極が前記第2のSiC領域に電気的に接続される請求項1又は請求項2記載の半導体装置。
- 前記第4のSiC領域が前記第2のSiC領域を囲む請求項1乃至請求項3いずれか一項記載の半導体装置。
- 前記第4のSiC領域の前記第1の面を基準とする深さが、前記第2のSiC領域及び前記第3のSiC領域の前記第1の面を基準とする深さよりも浅い請求項1乃至請求項4いずれか一項記載の半導体装置。
- 前記第2のSiC領域と前記第3のSiC領域とが接する請求項1乃至請求項5いずれか一項記載の半導体装置。
- 前記第3のSiC領域を囲んで前記SiC層内に設けられ、前記第1のSiC領域と前記第1の面との間に設けられ、前記第3のSiC領域よりも第2導電型の不純物濃度の低い第2導電型の第5のSiC領域を、更に備える請求項1乃至請求項6いずれか一項記載の半導体装置。
- 前記第2のSiC領域、前記第3のSiC領域、及び、前記第4のSiC領域はアルミニウム(Al)を含む請求項1乃至請求項7いずれか一項記載の半導体装置。
- 第1の面と第2の面とを有するSiC層と、
前記第1の面に接する第1の電極と、
前記SiC層内に設けられた第1導電型の第1のSiC領域と、
少なくとも一部が前記第1の電極と前記第1の面とが接する領域を囲んで前記SiC層内に設けられ、前記第1のSiC領域と前記第1の面との間に設けられた第2導電型の第2のSiC領域と、
前記第2のSiC領域を囲んで前記SiC層内に設けられ、前記第1のSiC領域と前記第1の面との間に設けられ、前記第2のSiC領域よりも第2導電型の不純物濃度の低い第2導電型の第3のSiC領域と、
前記第2のSiC領域と前記第3のSiC領域との間の前記SiC層内に設けられ、前記第2のSiC領域及び前記第3のSiC領域よりも結晶欠陥密度の高い第4のSiC領域と、
を備える半導体装置。 - 前記第2の面に設けられた第2の電極を、更に備える請求項9記載の半導体装置。
- 前記第1の電極が前記第2のSiC領域に電気的に接続される請求項9又は請求項10記載の半導体装置。
- 前記第4のSiC領域が前記第2のSiC領域を囲む請求項9乃至請求項11いずれか一項記載の半導体装置。
- 前記第4のSiC領域はアルゴン(Ar)を含む請求項9乃至請求項12いずれか一項記載の半導体装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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JP2015179327A JP6523886B2 (ja) | 2015-09-11 | 2015-09-11 | 半導体装置 |
US15/062,207 US9608058B1 (en) | 2015-09-11 | 2016-03-07 | Semiconductor device |
CN201610137248.1A CN106531801B (zh) | 2015-09-11 | 2016-03-10 | 半导体装置 |
TW105107660A TWI620251B (zh) | 2015-09-11 | 2016-03-11 | Semiconductor device |
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JP2015179327A JP6523886B2 (ja) | 2015-09-11 | 2015-09-11 | 半導体装置 |
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JP6523886B2 JP6523886B2 (ja) | 2019-06-05 |
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JP2008034646A (ja) * | 2006-07-28 | 2008-02-14 | Toshiba Corp | 高耐圧半導体装置 |
WO2013136550A1 (ja) * | 2012-03-16 | 2013-09-19 | 三菱電機株式会社 | 半導体装置およびその製造方法 |
JP2013251407A (ja) * | 2012-05-31 | 2013-12-12 | National Institute Of Advanced Industrial & Technology | 炭化珪素半導体装置および炭化珪素半導体装置の製造方法 |
WO2014155472A1 (ja) * | 2013-03-25 | 2014-10-02 | 新電元工業株式会社 | 半導体素子 |
WO2015033463A1 (ja) * | 2013-09-09 | 2015-03-12 | 株式会社日立製作所 | 半導体装置およびその製造方法、電力変換装置、3相モータシステム、自動車、ならびに鉄道車両 |
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JP2010087397A (ja) * | 2008-10-02 | 2010-04-15 | Sumitomo Electric Ind Ltd | 炭化珪素半導体装置 |
JP5223773B2 (ja) * | 2009-05-14 | 2013-06-26 | 三菱電機株式会社 | 炭化珪素半導体装置の製造方法 |
DE112011103469B4 (de) * | 2010-10-15 | 2023-01-19 | Mitsubishi Electric Corporation | Halbleitervorrichtung |
JP2012186318A (ja) | 2011-03-05 | 2012-09-27 | Shindengen Electric Mfg Co Ltd | 高耐圧半導体装置 |
US8937319B2 (en) * | 2011-03-07 | 2015-01-20 | Shindengen Electric Manufacturing Co., Ltd. | Schottky barrier diode |
JP5745954B2 (ja) | 2011-06-29 | 2015-07-08 | 三菱電機株式会社 | 半導体装置およびその製造方法 |
JP5728339B2 (ja) * | 2011-09-08 | 2015-06-03 | 株式会社東芝 | 半導体装置および半導体装置の製造方法 |
JP2014204038A (ja) | 2013-04-08 | 2014-10-27 | 三菱電機株式会社 | 半導体装置及びその製造方法 |
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JP2008034646A (ja) * | 2006-07-28 | 2008-02-14 | Toshiba Corp | 高耐圧半導体装置 |
WO2013136550A1 (ja) * | 2012-03-16 | 2013-09-19 | 三菱電機株式会社 | 半導体装置およびその製造方法 |
JP2013251407A (ja) * | 2012-05-31 | 2013-12-12 | National Institute Of Advanced Industrial & Technology | 炭化珪素半導体装置および炭化珪素半導体装置の製造方法 |
WO2014155472A1 (ja) * | 2013-03-25 | 2014-10-02 | 新電元工業株式会社 | 半導体素子 |
WO2015033463A1 (ja) * | 2013-09-09 | 2015-03-12 | 株式会社日立製作所 | 半導体装置およびその製造方法、電力変換装置、3相モータシステム、自動車、ならびに鉄道車両 |
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CN106531801B (zh) | 2019-10-25 |
US20170077220A1 (en) | 2017-03-16 |
TWI620251B (zh) | 2018-04-01 |
CN106531801A (zh) | 2017-03-22 |
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