JP4727964B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP4727964B2 JP4727964B2 JP2004276565A JP2004276565A JP4727964B2 JP 4727964 B2 JP4727964 B2 JP 4727964B2 JP 2004276565 A JP2004276565 A JP 2004276565A JP 2004276565 A JP2004276565 A JP 2004276565A JP 4727964 B2 JP4727964 B2 JP 4727964B2
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/10—Shapes, relative sizes or dispositions of the regions of the semiconductor bodies; Shapes of the semiconductor bodies
- H10D62/17—Semiconductor regions connected to electrodes not carrying current to be rectified, amplified or switched, e.g. channel regions
- H10D62/343—Gate regions of field-effect devices having PN junction gates
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/202—FETs having static field-induced regions, e.g. static-induction transistors [SIT] or permeable base transistors [PBT]
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/80—FETs having rectifying junction gate electrodes
- H10D30/83—FETs having PN junction gate electrodes
- H10D30/831—Vertical FETs having PN junction gate electrodes
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Description
Claims (18)
- 半導体の第1導電型n(又はp)の一面に形成されたドレイン電極と、前記半導体の他面に形成された一対の第1の溝部と、前記一対の第1の溝部に沿って形成された第2導電型p(又はn)の制御領域と、前記一対の第1の溝部の間で半導体の前記他面に形成された第1導電型のソース領域と、前記ソース領域に接合したソース電極と、前記制御領域に隣接するゲート電極を備えた縦型の電界効果トランジスタを備えた半導体装置において、
前記電界効果トランジスタとは独立して、前記半導体の前記他面に形成された一対の第2の溝部と、前記一対の第2の溝部に沿って形成された第2導電型の制御領域と、前記一対の第2の溝部の間で前記他面に形成された第1導電型のカソード層と、前記カソード層の上に形成された第2導電型のアノード層を含むダイオードを備えたことを特徴とする半導体装置。 - 請求項1において、前記ダイオードの接合が、炭化珪素と多結晶シリコンとのヘテロ接合、pn接合、又はショットキー接合であることを特徴とする半導体装置。
- 請求項1において、前記電界効果トランジスタと前記ダイオードとの間で半導体の前記他面に沿って形成された第1導電型のパンチスルーストッパー層を備えたことを特徴とする半導体装置。
- 半導体の第1導電型n(又はp)の一面に形成されたドレイン電極と、前記半導体の他面に形成された一対の第1の溝部と、前記一対の第1の溝部に沿って形成された第2導電型p(又はn)の制御領域と、前記一対の第1の溝部の間で半導体の前記他面に形成された第1導電型のソース領域と、前記ソース領域に接合したソース電極と、前記制御領域に隣接するゲート電極を備えた縦型の電界効果トランジスタを備えた半導体装置において、
前記電界効果トランジスタとは独立して、前記半導体の前記他面に形成された一対の第2の溝部と、前記一対の第2の溝部に沿って形成された第2導電型の制御領域と、前記一対の第2の前記溝部の間で前記他面に沿って形成された第1導電型のカソード層と、前記カソード層に接する第2導電型の多結晶シリコンを含むヘテロ接合ダイオードを備えたことを特徴とする半導体装置。 - 請求項4において、前記電界効果トランジスタと前記ダイオードとの間で半導体の前記他面に沿って形成された第1導電型のパンチスルーストッパー層を備えたことを特徴とする半導体装置。
- バンドギャップが2.0eV以上の半導体であり、低不純物濃度の第1導電型n(又はp)の基体と、この基体の一面に形成され、基体より低抵抗の第1導電型の第1層と、前記第1層の表面に形成されたドレイン電極と、前記基体の他面に形成された一対の第1の溝部と、前記一対の第1の溝部に接触するように半導体の前記他面に形成された第1導電型の第2領域と、前記第2領域に形成されたソース電極と、前記一対の第1の溝部に沿って形成された第2導電型の制御領域と、前記制御領域に隣接するゲート電極を備えた縦型の電界効果トランジスタを備えた炭化珪素半導体装置において、
前記電界効果トランジスタとは独立して、前記半導体の前記他面に形成された一対の第2の溝部と、前記一対の第2の溝部に沿って形成された第2導電型の制御領域と、前記一対の第2の溝部の間で前記他面に沿って形成された第1導電型のカソード領域と、前記カソード領域に接する第2導電型の多結晶シリコンを含むヘテロ接合ダイオードを備えたことを特徴とする炭化珪素半導体装置。 - 請求項6において、前記電界効果トランジスタと前記ダイオードとの間で、半導体の前記他面に沿って形成された第1導電型のパンチスルーストッパー層を備えたことを特徴とする炭化珪素半導体装置。
- 半導体の第1導電型n(又はp)の一面に形成されたドレイン電極と、前記半導体の他面に形成された一対の溝部と、前記一対の溝部に沿って形成された第2導電型p(又はn)の制御領域と、前記一対の溝部の間で前記半導体の他面に形成された第1導電型の第2領域と、前記第2領域に接合したソース電極と、前記制御領域に隣接するゲート電極を備えた縦型の電界効果トランジスタを備えた半導体装置において、
前記電界効果トランジスタとは独立して、前記半導体の他面側から形成された第2導電型の第3層と、前記第3層の内側でかつ前記他面に亘って形成された第1導電型の第4層と、前記第4層の内側でほぼ中央表面に沿って形成された第2導電型のアノード層と、前記第4層の内側で前記第4層よりも高濃度の第1導電型のカソード層を含むダイオードを備え、前記第3層は、前記一対の溝部よりも深く形成されていることを特徴とする半導体装置。 - 請求項8において、前記ダイオードの接合が、炭化珪素と多結晶シリコンとのヘテロ接合、pn接合、又はショットキー接合であることを特徴とする半導体装置。
- 請求項8において、前記第4層よりも高濃度の第1導電型のカソード層の表面にオーミック接触するカソード電極を備えたことを特徴とする半導体装置。
- 請求項8において、前記アノード層は、第2導電型の多結晶シリコンであることを特徴とする半導体装置。
- 請求項8において、前記第2導電型のアノード層の表面にオーミック接触するアノード電極を含むことを特徴とする半導体装置。
- 請求項8において、前記第3層の内側で、かつ前記電界効果トランジスタと前記ダイオードとの間で前記他面に沿って形成された第2導電型の第5層と、前記第5層にオーミック接触するとともに接地された電極を備えたことを特徴とする半導体装置。
- バンドギャップが2.0eV以上の半導体であり、低不純物濃度の第1導電型n(又はp)の基体と、前記基体の一面に形成され、基体より低抵抗の第1導電型の第1層と、前記第1層の表面に形成されたドレイン電極と、前記基体の他面に形成された一対の溝部と、前記一対の溝部に接触するように半導体の前記他面に形成された第1導電型の第2領域と、前記第2領域に形成されたソース電極と、前記一対の溝部に沿って形成された第2導電型の制御領域と、前記制御領域に隣接するゲート電極を備えた縦型の電界効果トランジスタを備えた炭化珪素半導体装置において、
前記電界効果トランジスタとは独立して、前記半導体の前記他面に沿って形成された第2導電型の第3層と、前記第3層の内側に前記他面に沿って形成された第1導電型の第4層と、前記第4層の内側でほぼ中央表面に沿って形成された第2導電型のアノード層と、前記第4層の内側で前記第4層よりも高濃度の第1導電型のカソード層を含むダイオードを備え、前記第3層は、前記一対の溝部よりも深く形成されていることを特徴とする炭化珪素半導体装置。 - 請求項14において、前記ダイオードの接合が、炭化珪素と多結晶シリコンとのヘテロ接合、pn接合、又はショットキー接合であることを特徴とする炭化珪素半導体装置。
- 請求項14において、前記第2導電型のアノード層は多結晶シリコンであることを特徴とする炭化珪素半導体装置。
- 請求項14において、前記第4層よりも高濃度の第1導電型のカソード層の表面にオーミック接触するカソード電極を備えたことを特徴とする炭化珪素半導体装置。
- 請求項14において、前記半導体の他面側から形成された前記第3層の内側で、かつ前記電界効果トランジスタと前記ダイオードとの間で、前記他面に沿って形成された第2導電型の第5層と、前記第5層にオーミック接触するとともに接地された電極を備えたことを特徴とする炭化珪素半導体装置。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004276565A JP4727964B2 (ja) | 2004-09-24 | 2004-09-24 | 半導体装置 |
| US11/206,212 US7307313B2 (en) | 2004-09-24 | 2005-08-18 | Semiconductor device including a vertical field effect transistor, having trenches, and a diode |
| DE102005039360A DE102005039360A1 (de) | 2004-09-24 | 2005-08-19 | Halbleiterbauteil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004276565A JP4727964B2 (ja) | 2004-09-24 | 2004-09-24 | 半導体装置 |
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| Publication Number | Publication Date |
|---|---|
| JP2006093382A JP2006093382A (ja) | 2006-04-06 |
| JP4727964B2 true JP4727964B2 (ja) | 2011-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2004276565A Expired - Lifetime JP4727964B2 (ja) | 2004-09-24 | 2004-09-24 | 半導体装置 |
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|---|---|
| US (1) | US7307313B2 (ja) |
| JP (1) | JP4727964B2 (ja) |
| DE (1) | DE102005039360A1 (ja) |
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