JP6836545B2 - 半導体装置 - Google Patents
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- JP6836545B2 JP6836545B2 JP2018092256A JP2018092256A JP6836545B2 JP 6836545 B2 JP6836545 B2 JP 6836545B2 JP 2018092256 A JP2018092256 A JP 2018092256A JP 2018092256 A JP2018092256 A JP 2018092256A JP 6836545 B2 JP6836545 B2 JP 6836545B2
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- 239000004065 semiconductor Substances 0.000 title claims description 216
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 33
- 229920005591 polysilicon Polymers 0.000 claims description 33
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 30
- 238000009413 insulation Methods 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 229910052814 silicon oxide Inorganic materials 0.000 description 8
- 239000010410 layer Substances 0.000 description 7
- 239000004020 conductor Substances 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 4
- 239000011229 interlayer Substances 0.000 description 3
- 229910005883 NiSi Inorganic materials 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
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Description
図面は模式的または概念的なものであり、各部分の厚さと幅との関係、部分間の大きさの比率などは、必ずしも現実のものと同一とは限らない。同じ部分を表す場合であっても、図面により互いの寸法や比率が異なって表される場合もある。
本願明細書と各図において、既出の図に関して前述したものと同様の要素には同一の符号を付して詳細な説明は適宜省略する。
図1は、第1実施形態に係る半導体装置を例示する模式的断面図である。
図1に示すように、実施形態に係る半導体装置110は、半導体部10s、ソース電極61、ゲート電極62、ドレイン電極63、第1構造体50、及び第1絶縁部31を含む。半導体部10sは、炭化珪素(SiC)を含む。
図2に示すように、第1実施形態の変形例に係る半導体装置111は、半導体部10s、ソース電極61、ゲート電極62、ドレイン電極63、第1構造体50、及び第1絶縁部31を含む。半導体部10sは、炭化珪素(SiC)を含む。半導体部10sは、第1〜第3半導体領域11〜13を含む。第1絶縁部31は、第1〜第3絶縁領域31a〜31cを含む。
図3は、第2実施形態に係る半導体装置を例示する模式的断面図である。
図3に示すように、実施形態に係る半導体装置120は、半導体部10s、半導体層10L、ソース電極61、ゲート電極62、ドレイン電極63、第1構造体50A、及び第1絶縁部31を含む。半導体装置120の構成は、例えば、第1構造体50A以外は、半導体装置110の構成と実質的に同じである。
図4に示すように、実施形態に係る半導体装置121は、半導体部10s、ソース電極61、ゲート電極62、ドレイン電極63、第1構造体50A、及び第1絶縁部31を含む。半導体装置121の構成は、例えば、第1構造体50A以外は、半導体装置111の構成と実質的に同じである。
Claims (10)
- SiCを含む半導体部であって、第1〜第3半導体領域を含み、
前記第1半導体領域は、第1導電形であり、第1〜第3部分領域を含み、
前記第2半導体領域は、前記第1導電形であり、前記第2部分領域から前記第2半導体領域への第1方向は、前記第2部分領域から前記第1部分領域への第2方向と交差し、
前記第2部分領域は、前記第2方向において、前記第3部分領域と前記第1部分領域との間に設けられ、
前記第3半導体領域は、第2導電形であり、前記第1方向において、前記第2部分領域と前記第2半導体領域との間に設けられた、前記半導体部と、
ゲート電極であって、前記第1部分領域から前記ゲート電極への方向は、前記第1方向に沿う、前記ゲート電極と、
ソース電極であって、前記第2半導体領域と電気的に接続され、前記第3部分領域から前記ソース電極への方向は、前記第1方向に沿う、前記ソース電極と、
第1構造体であって、前記第1構造体の前記第2方向における位置は、前記ソース電極の前記第2方向における位置と、前記ゲート電極の前記第2方向における位置と、の間である、前記第1構造体と、
第1絶縁部であって、第1絶縁領域及び第2絶縁領域を含み、
前記第1絶縁領域は、前記第1方向において、前記第1部分領域と前記ゲート電極との間に設けられ、
前記第2絶縁領域は、前記第1方向において、前記第2半導体領域と前記第1構造体との間に設けられ、
前記第2絶縁領域から前記第1絶縁領域への方向は、前記第2方向に沿う、前記第1絶縁部と、
を備え、
前記第1構造体は、ポリシリコン及びTiNの少なくともいずれかを含む、半導体装置。 - 前記ソース電極と電気的に接続された第1導電部をさらに備え、
前記第1導電部は、第1導電領域を含み、
前記ソース電極から前記第1導電領域への方向は、前記第1方向に沿う、請求項1記載の半導体装置。 - 前記第1導電部は、第2導電領域をさらに含み、
前記第2導電領域は、前記第2方向において、前記第1構造体と前記ゲート電極との間に位置する、請求項2記載の半導体装置。 - 第2絶縁部をさらに備え、
前記第2絶縁部は、前記第1構造体と前記第1導電部との間、及び、前記ゲート電極と前記第1導電部との間に設けられた、請求項2または3に記載の半導体装置。 - 第2導電部をさらに備え、
前記第2導電部は、前記第2絶縁部と前記第1導電部との間に設けられた、請求項4記載の半導体装置。 - 第3絶縁部をさらに備え、
前記ゲート電極は、前記第1方向において、前記第1絶縁領域と前記第3絶縁部との間に位置する、請求項1〜5のいずれか1つに記載の半導体装置。 - 第4絶縁部をさらに備え、
前記第1構造体は、前記第1方向において、前記第2絶縁領域と前記第4絶縁部との間に位置する、請求項1〜6のいずれか1つに記載の半導体装置。 - 前記第1構造体は、前記第2絶縁領域と接する、請求項1〜7のいずれか1つに記載の半導体装置。
- 前記第2半導体領域は、前記第2方向において、前記ソース電極と前記第1部分領域との間に位置し、
前記第3半導体領域は、前記第2方向において、前記ソース電極と前記第1部分領域との間に位置する、請求項1〜8のいずれか1つに記載の半導体装置。 - SiCを含む半導体部であって、第1半導体領域及び第2半導体領域を含む、前記半導体部と、
ゲート電極であって、前記第1半導体領域から前記ゲート電極への第1方向は、前記第2半導体領域から前記第1半導体領域への第2方向と交差した、前記ゲート電極と、
前記第2半導体領域と電気的に接続されたソース電極と、
第1構造体であって、前記第1構造体の前記第2方向における位置は、前記ソース電極の前記第2方向における位置と、前記ゲート電極の前記第2方向における位置と、の間である、前記第1構造体と、
第1絶縁部であって、第1絶縁領域及び第2絶縁領域を含み、
前記第1絶縁領域は、前記第1方向において、前記第1半導体領域と前記ゲート電極との間に設けられ、
前記第2絶縁領域は、前記第1方向において、前記第2半導体領域と前記第1構造体との間に設けられ、
前記第2絶縁領域から前記第1絶縁領域への方向は、前記第2方向に沿う、前記第1絶縁部と、
を備え、
前記第1構造体は、ポリシリコン及びTiNの少なくともいずれかを含む、半導体装置。
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JP2007158148A (ja) * | 2005-12-07 | 2007-06-21 | Oki Electric Ind Co Ltd | 半導体装置及びその製造方法 |
US10367089B2 (en) * | 2011-03-28 | 2019-07-30 | General Electric Company | Semiconductor device and method for reduced bias threshold instability |
WO2014156791A1 (ja) * | 2013-03-29 | 2014-10-02 | 富士電機株式会社 | 半導体装置および半導体装置の製造方法 |
JP6347442B2 (ja) * | 2014-08-19 | 2018-06-27 | 国立研究開発法人産業技術総合研究所 | 炭化珪素半導体装置の製造方法 |
WO2016132987A1 (ja) * | 2015-02-20 | 2016-08-25 | 住友電気工業株式会社 | 炭化珪素半導体装置 |
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