JP2007165380A - 半導体装置及びその製造方法 - Google Patents
半導体装置及びその製造方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 74
- 238000004519 manufacturing process Methods 0.000 title claims description 14
- 238000009792 diffusion process Methods 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims description 8
- 238000005530 etching Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 238000000151 deposition Methods 0.000 claims description 4
- 230000001590 oxidative effect Effects 0.000 claims description 4
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 7
- 229920005591 polysilicon Polymers 0.000 description 7
- 239000000758 substrate Substances 0.000 description 7
- 230000001360 synchronised effect Effects 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 4
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001020 plasma etching Methods 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000005468 ion implantation Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000007792 addition Methods 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
- 238000004380 ashing Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
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Abstract
【解決手段】第1導電型の半導体領域1と、前記半導体領域1に接続される第1主電極12と、前記半導体領域上に形成された第2導電型のベース領域3と、前記ベース領域上に形成された第1導電型の拡散領域4と、該拡散領域4と前記ベース領域3に接続される第2主電極11と、前記拡散領域上面から前記半導体領域1に達するように形成された第1トレンチ5と、該第1トレンチ5から前記第1トレンチ5よりさらに深く形成された第2トレンチ6と、前記第1トレンチ5の側面に第1絶縁膜7aを介して形成されたゲート電極8と、前記第2トレンチ6に第2絶縁膜7bを介して形成されゲート電極8より下方に突出して形成されるとともに前記第2主電極12と接続された突出電極9とを備える。
【選択図】図1
Description
Claims (5)
- 第1導電型の半導体領域と、
前記半導体領域に接続される第1主電極と、
前記半導体領域上に形成された第2導電型のベース領域と、
前記ベース領域上に形成された第1導電型の拡散領域と、
該拡散領域と前記ベース領域に接続される第2主電極と、
前記拡散領域上面から前記半導体領域に達するように形成された第1トレンチと、
該第1トレンチから前記第1トレンチよりさらに深く形成された第2トレンチと、
前記第1トレンチの側面に第1絶縁膜を介して形成されたゲート電極と、
前記第2トレンチに第2絶縁膜を介して前記ゲート電極より下方に突出して形成されるとともに前記第2主電極と接続された突出電極と
を備えることを特徴とする半導体装置。 - 前記第2絶縁膜は、前記第1絶縁膜と比較して厚く形成されていることを特徴とする請求項1記載の半導体装置。
- 前記突出電極は、前記ゲート電極が形成された深さ領域よりも深い位置にのみ形成されていることを特徴とする請求項1又は2記載の半導体装置。
- 前記第2トレンチに隣接する前記半導体領域に前記半導体領域よりも不純物濃度が高い第1導電型の抵抗低減層が形成されていることを特徴とする請求項1乃至3のいずれか1項記載の半導体装置。
- 第1導電型の半導体領域上に第2導電型のベース領域を形成する工程と、
前記ベース領域を貫いて前記半導体領域に達する深さまで第1トレンチを形成する工程と、
該第1トレンチ及び前記ベース領域の表面全体に亘って熱酸化させて絶縁膜を形成する工程と、
該絶縁膜の表面に導電膜を堆積する工程と、
該導電層に対して異方性エッチングを行い前記第1トレンチの側面にのみ導電層を残す工程と、
前記第1トレンチの底部中央領域に前記第1トレンチよりもさらに深く延びた第2トレンチを形成する工程と、
前記異方性エッチング後に残存した導電層、及び前記第2トレンチの表面を熱酸化させて絶縁膜を形成する工程と、
該第2トレンチに形成された絶縁膜の表面に導電層を堆積する工程と、
を有することを特徴とする半導体装置の製造方法。
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JP2005356109A JP4817827B2 (ja) | 2005-12-09 | 2005-12-09 | 半導体装置 |
US11/608,538 US7719053B2 (en) | 2005-12-09 | 2006-12-08 | Semiconductor device having increased gate-source capacity provided by protruding electrode disposed between gate electrodes formed in a trench |
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JP2005356109A JP4817827B2 (ja) | 2005-12-09 | 2005-12-09 | 半導体装置 |
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Cited By (20)
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WO2009075200A1 (ja) * | 2007-12-10 | 2009-06-18 | Kabushiki Kaisha Toyota Chuo Kenkyusho | 半導体装置とその製造方法、並びにトレンチゲートの製造方法 |
JP2009259968A (ja) * | 2008-04-15 | 2009-11-05 | Nec Electronics Corp | 半導体装置及びその製造方法 |
JP2012064641A (ja) * | 2010-09-14 | 2012-03-29 | Toshiba Corp | 半導体装置 |
JP2012164916A (ja) * | 2011-02-09 | 2012-08-30 | Toshiba Corp | 半導体装置およびその製造方法 |
JP2012204590A (ja) * | 2011-03-25 | 2012-10-22 | Toshiba Corp | 半導体装置およびその製造方法 |
JP2013135222A (ja) * | 2011-12-26 | 2013-07-08 | Samsung Electro-Mechanics Co Ltd | 半導体素子及びその製造方法 |
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WO2015041025A1 (ja) * | 2013-09-20 | 2015-03-26 | サンケン電気株式会社 | 半導体装置 |
KR20150032799A (ko) * | 2013-09-20 | 2015-03-30 | 산켄덴키 가부시키가이샤 | 반도체장치 |
JP2015084410A (ja) * | 2013-09-20 | 2015-04-30 | サンケン電気株式会社 | 半導体装置 |
US9276095B2 (en) | 2013-09-20 | 2016-03-01 | Sanken Electric Co., Ltd. | Semiconductor device |
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JP2017126635A (ja) * | 2016-01-13 | 2017-07-20 | サンケン電気株式会社 | 半導体装置 |
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JP7472090B2 (ja) | 2021-09-15 | 2024-04-22 | 株式会社東芝 | 半導体装置及び半導体装置の製造方法 |
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US7719053B2 (en) | 2010-05-18 |
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