JP2019091822A - 半導体装置 - Google Patents
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 192
- 239000012535 impurity Substances 0.000 claims description 14
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 5
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 2
- 229920005591 polysilicon Polymers 0.000 claims description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 114
- 238000004519 manufacturing process Methods 0.000 description 20
- 238000009826 distribution Methods 0.000 description 11
- 230000015556 catabolic process Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000001020 plasma etching Methods 0.000 description 7
- 229920002120 photoresistant polymer Polymers 0.000 description 6
- 238000005229 chemical vapour deposition Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000005530 etching Methods 0.000 description 4
- 239000011229 interlayer Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 230000014509 gene expression Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- INQLNSVYIFCUML-QZTLEVGFSA-N [[(2r,3s,4r,5r)-5-(6-aminopurin-9-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-hydroxyphosphoryl] [(2r,3s,4r,5r)-5-(4-carbamoyl-1,3-thiazol-2-yl)-3,4-dihydroxyoxolan-2-yl]methyl hydrogen phosphate Chemical compound NC(=O)C1=CSC([C@H]2[C@@H]([C@H](O)[C@@H](COP(O)(=O)OP(O)(=O)OC[C@@H]3[C@H]([C@@H](O)[C@@H](O3)N3C4=NC=NC(N)=C4N=C3)O)O2)O)=N1 INQLNSVYIFCUML-QZTLEVGFSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
Description
第1実施形態に係る半導体装置は、スーパージャンクション構造のMOSFETにおいて、ソース電極とドレイン領域が高抵抗の導電性膜で構成された電気接続部を介して接続されている。その結果、導電性膜に等電位分布が形成され、MOSFETの下方に位置する半導体領域に形成される空乏層がドレイン領域の方向に延びる。その効果として、各MOSFETの耐圧が向上する。以下に、その詳細を説明する。
第2実施形態においては、上述した第1実施形態における導電性膜SINと絶縁膜IN1とから形成された電気接続部の周囲に、ベース領域Bからドレイン領域Dの方向に延びるp形の半導体層を形成することにより、n形のピラーPLとp形の半導体層の間に空乏層を形成して耐圧を確保しつつ、n形とp形の不純物濃度がばらついたとしても電気接続部の等電位分布により耐圧を確保できるようにしている。以下、上述した第1実施形態と異なる部分を説明する。
Claims (11)
- 第1導電形のドレイン領域と、
前記ドレイン領域の上に設けられた第1導電形の第1半導体領域と、
前記第1半導体領域の上部に形成されたMOSFETと、
前記MOSFETを覆うように形成されたソース電極と、
前記第1半導体領域の両側に形成された一対の電気接続部であって、前記第1半導体領域とは電気的に絶縁された状態で、前記ドレイン領域と前記ソース電極との間を電気的に接続する、電気接続部と、
を備える半導体装置。 - 前記電気接続部は、
前記ドレイン領域と前記ソース電極とを電気的に接続する導電性膜と、
前記導電性膜の両側に形成された一対の第1絶縁膜と、
を備える請求項1に記載の半導体装置。 - 前記導電性膜は、高抵抗の導電性膜により構成されている、請求項2に記載の半導体装置。
- 前記導電性膜は、半導電性窒化シリコン(Semi-Insulating SiN)、又は、半導電性ポリシリコン(Semi-Insulating Poly-crystalline Silicon)により構成されている、請求項2又は請求項3に記載の半導体装置。
- 前記電気接続部において、前記一対の第1絶縁膜の間は、前記導電性膜が充填されている、請求項2乃至請求項4のいずれかに記載の半導体装置。
- 前記一対の第1絶縁膜は、前記ドレイン領域の内部にまで達している、請求項2乃至請求項5のいずれかに記載の半導体装置。
- 前記第1半導体領域の第1導電形の不純物濃度は、前記ドレイン領域の第1導電形の不純物濃度より低い、請求項1乃至請求項6のいずれかに記載の半導体装置。
- 前記電気接続部の前記ソース電極と前記ドレイン領域との間の電気的な抵抗は、107Ωから1010Ωの間である請求項1乃至請求項7のいずれかに記載の半導体装置。
- 前記MOSFETは、
前記第1半導体領域の上部に形成された、第2導電形の第2半導体領域と、
前記第2半導体領域の上部に形成された、第1導電形のソース領域と、
前記ソース領域と前記第2半導体領域とを貫通して、前記第1半導体領域に達する、ゲート領域であって、第2絶縁膜を介して前記ソース領域と前記第1半導体領域と前記第2半導体領域に接する、ゲート領域と、
を備える請求項1乃至請求項6のいずれかに記載の半導体装置。 - 第1導電形のドレイン領域と、
前記ドレイン領域の上に設けられた第1導電形の第1半導体領域と、
前記第1半導体領域の上部に形成された第2導電形の第2半導体領域と、
前記第2半導体領域に形成されたMOSFETと、
前記MOSFETを覆うように形成されたソース電極と、
前記第1半導体領域の両側に形成された一対の電気接続部であって、前記第1半導体領域とは電気的に絶縁された状態で、前記ドレイン領域と前記ソース電極との間を電気的に接続する、電気接続部と、
前記電気接続部の周囲で、前記第2半導体領域から前記ドレイン領域の方向に延びる、第2導電形の第3半導体領域と、
を備える半導体装置。 - 前記第3半導体領域は、前記第2半導体領域と前記ドレイン領域とを接続する、請求項10に記載の半導体装置。
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JP2017220305A JP2019091822A (ja) | 2017-11-15 | 2017-11-15 | 半導体装置 |
CN201810170456.0A CN109786459A (zh) | 2017-11-15 | 2018-03-01 | 半导体装置 |
US15/916,355 US10490628B2 (en) | 2017-11-15 | 2018-03-09 | Semiconductor device |
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CN113224161A (zh) * | 2020-02-05 | 2021-08-06 | 株式会社东芝 | 半导体装置 |
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JP2003523086A (ja) * | 2000-02-12 | 2003-07-29 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 半導体デバイスおよび半導体デバイス用の材料を製造する方法 |
JP2003523087A (ja) * | 2000-02-12 | 2003-07-29 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 増加する逆阻止電圧のための分圧器を伴う半導体装置 |
JP2004519848A (ja) * | 2001-02-22 | 2004-07-02 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 半導体デバイス |
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DE19611045C1 (de) * | 1996-03-20 | 1997-05-22 | Siemens Ag | Durch Feldeffekt steuerbares Halbleiterbauelement |
JP3993458B2 (ja) | 2002-04-17 | 2007-10-17 | 株式会社東芝 | 半導体装置 |
JP4438317B2 (ja) | 2003-05-09 | 2010-03-24 | 株式会社デンソー | 半導体装置の製造方法 |
US8461648B2 (en) * | 2005-07-27 | 2013-06-11 | Infineon Technologies Austria Ag | Semiconductor component with a drift region and a drift control region |
JP2007129086A (ja) | 2005-11-04 | 2007-05-24 | Toshiba Corp | 半導体装置 |
JP2009135360A (ja) * | 2007-12-03 | 2009-06-18 | Renesas Technology Corp | 半導体装置およびその製造方法 |
US8390060B2 (en) * | 2010-07-06 | 2013-03-05 | Maxpower Semiconductor, Inc. | Power semiconductor devices, structures, and related methods |
JP5687582B2 (ja) * | 2010-09-21 | 2015-03-18 | 株式会社東芝 | 半導体素子およびその製造方法 |
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2017
- 2017-11-15 JP JP2017220305A patent/JP2019091822A/ja active Pending
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2018
- 2018-03-01 CN CN201810170456.0A patent/CN109786459A/zh not_active Withdrawn
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JP2003523086A (ja) * | 2000-02-12 | 2003-07-29 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 半導体デバイスおよび半導体デバイス用の材料を製造する方法 |
JP2003523087A (ja) * | 2000-02-12 | 2003-07-29 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 増加する逆阻止電圧のための分圧器を伴う半導体装置 |
JP2004519848A (ja) * | 2001-02-22 | 2004-07-02 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 半導体デバイス |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113224161A (zh) * | 2020-02-05 | 2021-08-06 | 株式会社东芝 | 半导体装置 |
JP2021125559A (ja) * | 2020-02-05 | 2021-08-30 | 株式会社東芝 | 半導体装置 |
JP7374795B2 (ja) | 2020-02-05 | 2023-11-07 | 株式会社東芝 | 半導体装置 |
CN113224161B (zh) * | 2020-02-05 | 2024-03-29 | 株式会社东芝 | 半导体装置 |
Also Published As
Publication number | Publication date |
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US20190148488A1 (en) | 2019-05-16 |
CN109786459A (zh) | 2019-05-21 |
US10490628B2 (en) | 2019-11-26 |
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