JP6291298B2 - 半導体装置 - Google Patents
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- JP6291298B2 JP6291298B2 JP2014055668A JP2014055668A JP6291298B2 JP 6291298 B2 JP6291298 B2 JP 6291298B2 JP 2014055668 A JP2014055668 A JP 2014055668A JP 2014055668 A JP2014055668 A JP 2014055668A JP 6291298 B2 JP6291298 B2 JP 6291298B2
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- 239000004065 semiconductor Substances 0.000 title claims description 420
- 239000012535 impurity Substances 0.000 claims description 70
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 239000000758 substrate Substances 0.000 description 26
- 230000015556 catabolic process Effects 0.000 description 21
- 230000005684 electric field Effects 0.000 description 19
- 238000009826 distribution Methods 0.000 description 18
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 12
- 229910010271 silicon carbide Inorganic materials 0.000 description 12
- 238000005468 ion implantation Methods 0.000 description 9
- 230000007423 decrease Effects 0.000 description 8
- 230000004888 barrier function Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 230000006378 damage Effects 0.000 description 5
- 150000002500 ions Chemical class 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 229910052796 boron Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 238000005092 sublimation method Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
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- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
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- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
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- H01L29/0619—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse biased devices by the doping profile or the shape or the arrangement of the PN junction, or with supplementary regions, e.g. junction termination extension [JTE] with a supplementary region doped oppositely to or in rectifying contact with the semiconductor containing or contacting region, e.g. guard rings with PN or Schottky junction
Description
図1は、第1の実施形態に係る半導体装置の構成を例示する模式的断面図である。図2は、第1の実施形態に係る半導体装置の構成を例示する模式的平面図である。図1には、図2に示すA−A線の模式的断面図が表される。
1半導体領域)11と、アノード電極(第1電極)81と、第1p形半導体領域(第2半導体領域)20と、第2p形半導体領域(第3半導体領域)30と、n−形半導体領域(第4半導体領域)40と、p+形半導体領域(第5半導体領域)50と、カソード電極(第2電極)82と、を備える。半導体装置110は、JBSダイオード及びPNダイオードを含む。
2μm以下程度である。第2p形半導体領域30の厚さは、第1p形半導体領域20の厚さと実質的に同じでもよい。
第2p形半導体領域30とn−−形半導体領域11との境界付近をピークとして、n−形半導体領域40の位置で急激に低下する。また、電界強度分布E1の電界強度は、n−形半導体領域40の位置から深さ方向に徐々に減少する。
次に、第2の実施形態について説明する。図7は、第2の実施形態に係る半導体装置の構成を例示する模式的断面図である。図7には、第2の実施形態に係る半導体装置121が表される。
次に、第3の実施形態について説明する。図8は、第3の実施形態に係る半導体装置の構成を例示する模式的断面図であり、図9〜図11は、第3の実施形態に係る半導体装置の構成を例示する模式的平面図である。
次に、第4の実施形態について説明する。図12は、第4の実施形態に係る半導体装置の構成を例示する模式的平面図である。図12には、第4の実施形態に係る半導体装置136が表される。
Claims (10)
- 第1導電形の第1半導体領域と、
前記第1半導体領域とショットキー接合した第1電極と、
前記第1半導体領域と前記第1電極との間に設けられた複数の第2導電形の第2半導体領域と、
前記第1半導体領域と前記第1電極との間に設けられ前記第1電極とオーミック接合した第2導電形の第3半導体領域と、
前記第1半導体領域と前記第3半導体領域との間に設けられ前記第1半導体領域の不純物の濃度よりも高い不純物の濃度を有する第1導電形の第4半導体領域と、
前記第3半導体領域と前記第1電極の間に設けられ前記第3半導体領域の不純物の濃度よりも高い不純物の濃度を有する第2導電形の第5半導体領域と、
前記第1半導体領域の前記第1電極とは反対側に設けられた第2電極と、
を備え、
前記第3半導体領域は、少なくとも第1の部分と第2の部分とからなり、
前記第4半導体領域は、少なくとも第3の部分と第4の部分とからなり、
前記第3の部分は、前記第1半導体領域と前記第1の部分との間に設けられ、
前記第4の部分は、前記第1半導体領域と前記第2の部分との間に設けられ、
前記第1の部分は、前記複数の第2半導体領域及び前記第2の部分を囲むように設けられた半導体装置。 - 前記第1半導体領域から前記第1電極への方向において、前記第4半導体領域の前記第3の部分を投影した場合、前記第5半導体領域と実質的に重なる請求項1に記載の半導体装置。
- 前記第1半導体領域から前記第1電極への方向において、前記第1電極の外周端は前記第5半導体領域の端部と前記第3半導体領域の前記第1の部分の端部との間に設けられた請求項1または2に記載の半導体装置。
- 前記第5半導体領域は、前記第3半導体領域の前記第1の部分の内部に設けられた請求項1から3のいずれか1つに記載の半導体装置。
- 前記第3半導体領域の前記第1の部分の端部を囲むように設けられ前記第3半導体領域の不純物の濃度よりも低い不純物の濃度を有する第2導電形の第6半導体領域をさらに備えた請求項1から4のいずれか1つに記載の半導体装置。
- 前記第1半導体領域、前記第2半導体領域、前記第3半導体領域、前記第4半導体領域及び前記第5半導体領域は、SiCを含む請求項1から5のいずれか1つに記載の半導体装置。
- 前記複数の第2半導体領域は第1方向に延びて設けられるとともに、互いに略平行となるように前記第1方向と直交する第2方向に配置され、前記第2の部分は前記第1方向において前記複数の第2半導体領域の間に配置された請求項1から6のいずれか1つに記載の半導体装置。
- 前記第2の部分は複数の部分からなる請求項7に記載の半導体装置。
- 前記第1方向において、前記複数の第2半導体領域と前記第2の部分が交互に配置される請求項8に記載の半導体装置。
- 前記第2方向において、前記複数の第2半導体領域と前記第2の部分が交互に配置される請求項8または9に記載の半導体装置。
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US9773863B2 (en) * | 2014-05-14 | 2017-09-26 | Infineon Technologies Austria Ag | VDMOS having a non-depletable extension zone formed between an active area and side surface of semiconductor body |
US10468479B2 (en) | 2014-05-14 | 2019-11-05 | Infineon Technologies Austria Ag | VDMOS having a drift zone with a compensation structure |
JP6400544B2 (ja) * | 2015-09-11 | 2018-10-03 | 株式会社東芝 | 半導体装置 |
JP6505625B2 (ja) | 2016-03-16 | 2019-04-24 | 株式会社東芝 | 半導体装置 |
JP6758987B2 (ja) * | 2016-08-04 | 2020-09-23 | 株式会社日立製作所 | 半導体装置 |
JP2019054170A (ja) * | 2017-09-15 | 2019-04-04 | 株式会社東芝 | 半導体装置 |
JP6730237B2 (ja) * | 2017-09-19 | 2020-07-29 | 株式会社東芝 | 半導体装置 |
CN111916440A (zh) * | 2019-05-07 | 2020-11-10 | 创能动力科技有限公司 | 半导体器件 |
JP7292233B2 (ja) * | 2020-03-11 | 2023-06-16 | 株式会社東芝 | 半導体装置 |
JP7305591B2 (ja) | 2020-03-24 | 2023-07-10 | 株式会社東芝 | 半導体装置 |
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US9117739B2 (en) * | 2010-03-08 | 2015-08-25 | Cree, Inc. | Semiconductor devices with heterojunction barrier regions and methods of fabricating same |
JP2012174878A (ja) | 2011-02-22 | 2012-09-10 | Hitachi Ltd | 半導体装置、及びそれを用いた装置 |
US8937319B2 (en) | 2011-03-07 | 2015-01-20 | Shindengen Electric Manufacturing Co., Ltd. | Schottky barrier diode |
JP5550589B2 (ja) | 2011-03-23 | 2014-07-16 | 株式会社東芝 | 半導体装置 |
JP5926893B2 (ja) | 2011-04-26 | 2016-05-25 | 株式会社 日立パワーデバイス | 炭化珪素ダイオード |
US9324782B2 (en) * | 2012-01-06 | 2016-04-26 | Mitsubishi Electric Corporation | Semiconductor device |
JP2013201190A (ja) * | 2012-03-23 | 2013-10-03 | Toshiba Corp | 接合形電界効果トランジスタ及びその製造方法 |
JP2015032627A (ja) | 2013-07-31 | 2015-02-16 | 株式会社東芝 | 半導体装置 |
JP5940500B2 (ja) * | 2013-09-11 | 2016-06-29 | 株式会社東芝 | 半導体装置及びその製造方法 |
JP6170856B2 (ja) * | 2014-03-14 | 2017-07-26 | 株式会社東芝 | 半導体装置 |
-
2013
- 2013-12-24 CN CN201310722050.6A patent/CN104282732B/zh active Active
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2014
- 2014-03-07 US US14/201,711 patent/US9142687B2/en active Active
- 2014-03-18 JP JP2014055668A patent/JP6291298B2/ja active Active
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JP2015029046A (ja) | 2015-02-12 |
US9142687B2 (en) | 2015-09-22 |
CN104282732A (zh) | 2015-01-14 |
US20150357482A1 (en) | 2015-12-10 |
CN104282732B (zh) | 2017-06-27 |
US20150001552A1 (en) | 2015-01-01 |
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