JP2009105110A - 半導体素子 - Google Patents
半導体素子 Download PDFInfo
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- JP2009105110A JP2009105110A JP2007273430A JP2007273430A JP2009105110A JP 2009105110 A JP2009105110 A JP 2009105110A JP 2007273430 A JP2007273430 A JP 2007273430A JP 2007273430 A JP2007273430 A JP 2007273430A JP 2009105110 A JP2009105110 A JP 2009105110A
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 152
- 239000000758 substrate Substances 0.000 claims abstract description 27
- 238000009792 diffusion process Methods 0.000 claims description 6
- 239000012535 impurity Substances 0.000 abstract description 33
- 230000015556 catabolic process Effects 0.000 abstract description 31
- 230000003247 decreasing effect Effects 0.000 abstract description 2
- 230000005684 electric field Effects 0.000 description 23
- 238000000034 method Methods 0.000 description 9
- 230000007423 decrease Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000005468 ion implantation Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000001459 lithography Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- H01L29/063—Reduced surface field [RESURF] pn-junction structures
- H01L29/0634—Multiple reduced surface field (multi-RESURF) structures, e.g. double RESURF, charge compensation, cool, superjunction (SJ), 3D-RESURF, composite buffer (CB) structures
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Abstract
【解決手段】半導体素子は、n+型半導体基板1の上面上にn型ピラー領域2とp型ピラー領域3とを交互に設けたスーパージャンクション領域を備える。また、スーパージャンクション領域の上面に設けられたp型ベース領域4及びn型ソース層5を備える。そして、ゲート絶縁膜6を介して設けられたゲート電極7、n+型半導体基板1の下面に設けられたドレイン電極9及びn+型半導体基板1の上面に設けられたソース電極8を備える。終端領域のスーパージャンクション領域の上面にはリサーフ領域10が形成され、このリサーフ領域10の平面形状は、終端領域の端部方向に歯を向けた櫛形の形状であり、且つ櫛形の凸部が先端に向けて細くなる形状である。
【選択図】図1
Description
Claims (5)
- 相互に対向する上面及び下面を有する第1導電型の半導体基板と、
前記半導体基板の素子領域及び前記素子領域を囲むように設けられた終端領域の上面上に第1導電型の第1半導体ピラー領域と第2導電型の第2半導体ピラー領域とを前記半導体基板の上面に沿った方向に交互に設けてなるスーパージャンクション領域と、
前記半導体基板の下面に電気的に接続された第1の主電極と、
前記スーパージャンクション領域の上面に選択的に設けられた第2導電型の半導体ベース領域と、
前記半導体ベース領域の上面に選択的に設けられた第1導電型の半導体拡散領域と、
前記半導体ベース領域及び前記半導体拡散領域に電気的に接続するように設けられた第2の主電極と、
前記半導体拡散領域から前記半導体ベース領域を介して前記第1半導体ピラー領域に亘る領域に絶縁膜を介して設けられた制御電極と、
前記終端領域の前記スーパージャンクション領域の上面に前記半導体ベース領域に接続するように設けられた第2導電型のリサーフ領域とを備え、
前記リサーフ領域の平面形状は、前記終端領域の端部方向に歯を向けた櫛形の形状であり、且つ櫛形の凸部が先端に向けて細くなる形状であることを特徴とする半導体素子。 - 前記スーパージャンクション領域の交互に設けられた前記第1半導体ピラー領域及び前記第2半導体ピラー領域の一組が有する幅は、櫛形に設けられた前記リサーフ領域の繰り返して設けられる櫛形の凸部の一単位が有する幅よりも大きくされていることを特徴とする請求項1記載の半導体素子。
- 前記リサーフ領域は、前記スーパージャンクション領域の交互に設けられた前記第1半導体ピラー領域及び前記第2半導体ピラー領域の長手方向に略直交する方向に櫛形の凸部を向けて設けられたことを特徴とする請求項1又は2記載の半導体素子。
- 前記リサーフ領域は、前記半導体ベース領域の周囲の全周に亘って設けられていることを特徴とする請求項1又は2記載の半導体素子。
- 前記リサーフ領域上にフィールド絶縁膜を介して設けられたフィールドプレート電極を更に備えることを特徴とする請求項1乃至4のいずれか記載の半導体素子。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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JP2007273430A JP5198030B2 (ja) | 2007-10-22 | 2007-10-22 | 半導体素子 |
US12/252,872 US7989910B2 (en) | 2007-10-22 | 2008-10-16 | Semiconductor device including a resurf region with forward tapered teeth |
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JP2007273430A JP5198030B2 (ja) | 2007-10-22 | 2007-10-22 | 半導体素子 |
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JP2009105110A true JP2009105110A (ja) | 2009-05-14 |
JP5198030B2 JP5198030B2 (ja) | 2013-05-15 |
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JP2007273430A Active JP5198030B2 (ja) | 2007-10-22 | 2007-10-22 | 半導体素子 |
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JP (1) | JP5198030B2 (ja) |
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JP2014110382A (ja) * | 2012-12-04 | 2014-06-12 | Denso Corp | 半導体装置 |
US9293564B2 (en) | 2014-06-16 | 2016-03-22 | Fuji Electric Co., Ltd. | Semiconductor device manufacturing method |
WO2016043247A1 (ja) * | 2014-09-17 | 2016-03-24 | 富士電機株式会社 | 半導体装置 |
WO2016185544A1 (ja) * | 2015-05-18 | 2016-11-24 | 株式会社日立製作所 | 半導体装置および電力変換装置 |
WO2018110556A1 (ja) * | 2016-12-12 | 2018-06-21 | 株式会社デンソー | 炭化珪素半導体装置およびその製造方法 |
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