JP2017017071A - 窒化物半導体装置 - Google Patents
窒化物半導体装置 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 203
- 150000004767 nitrides Chemical class 0.000 title claims abstract description 99
- 230000004888 barrier function Effects 0.000 claims abstract description 22
- 238000000926 separation method Methods 0.000 claims description 13
- 239000012535 impurity Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 383
- 230000005533 two-dimensional electron gas Effects 0.000 description 16
- 230000007423 decrease Effects 0.000 description 12
- 239000000758 substrate Substances 0.000 description 12
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 229910002704 AlGaN Inorganic materials 0.000 description 2
- 229910052745 lead Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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Abstract
Description
本明細書または図面に説明した技術要素は、単独あるいは各種の組み合わせによって技術有用性を発揮するものであり、出願時請求項記載の組み合わせに限定されるものではない。また、本明細書または図面に例示した技術は複数目的を同時に達成するものであり、そのうちの1つの目的を達成すること自体で技術有用性を持つものである。
12 :下地基板
14 :バッファ層
16 :電子走行層
18 :電子供給層
18a :ヘテロ接合
30 :ソース電極
32 :ドレイン電極
34 :p型ゲート層
36 :ゲート電極
37 :ショットキー電極部
37a :ショットキー界面
38 :オーミック電極部
38a :オーミック界面
40 :空乏層
42 :空乏層
Claims (11)
- 窒化物半導体装置であって、
第1窒化物半導体層と、
前記第1窒化物半導体層上に配置されており、前記第1窒化物半導体層よりもバンドギャップが大きい第2窒化物半導体層と、
前記第2窒化物半導体層上に配置されているp型半導体層と、
前記p型半導体層上に配置されているゲート電極、
を有しており、
前記ゲート電極と前記p型半導体層の間に、前記p型半導体層から前記ゲート電極に向かう方向においてホールに対して第1の障壁を有する第1界面と、前記p型半導体層から前記ゲート電極に向かう方向においてホールに対して第1の障壁よりも大きい第2の障壁を有する第2界面とが、並列に配置されている窒化物半導体装置。 - 前記第1界面では、前記ゲート電極が前記p型半導体層にオーミック接触しており、
前記第2界面では、前記ゲート電極が前記p型半導体層にショットキー接触している、
請求項1の窒化物半導体装置。 - 前記第1界面と前記第2界面が隣接している請求項1または2の窒化物半導体装置。
- 前記ゲート電極が、前記p型半導体層に埋設されている埋設部を有しており、
前記埋設部と前記p型半導体層の界面に、前記第2界面が形成されている、
請求項2〜5の何れか一項の窒化物半導体装置。 - 前記p型半導体層が、低濃度領域と、前記低濃度領域よりもp型不純物濃度が高い高濃度領域を有しており、
前記ゲート電極が、前記低濃度領域と前記高濃度領域に接触しており、
前記高濃度領域と前記ゲート電極の界面に、前記第1界面が形成されており、
前記低濃度領域と前記ゲート電極の界面に、前記第2界面が形成されている、
請求項2〜6の何れか一項の窒化物半導体装置。 - 前記ゲート電極の前記第1界面を介して前記p型半導体層に接している部分と、前記ゲート電極の前記第2界面を介して前記p型半導体層に接している部分が、共通の金属により構成されている請求項7の窒化物半導体装置。
- 前記p型半導体層に接するとともに前記p型半導体層によって前記第2窒化物半導体層から分離されているn型半導体層をさらに有し、
前記ゲート電極が、前記p型半導体層と前記n型半導体層に接触しており、
前記ゲート電極と前記p型半導体層の界面に、前記第1界面が形成されており、
前記n型半導体層と前記p型半導体層の界面に、前記第2界面が形成されている、
請求項1の窒化物半導体装置。 - 前記第2窒化物半導体層上に配置されているソース電極と、
前記第2窒化物半導体層上に配置されているドレイン電極、
をさらに有し、
前記p型半導体層が、前記ソース電極と前記ドレイン電極の間に配置されている、
請求項1〜9の何れか一項の窒化物半導体装置。 - 前記第2窒化物半導体層の表面に配置されているソース電極と、
前記第1窒化物半導体層の裏面に配置されているドレイン電極と、
前記第1窒化物半導体層の内部に配置されているp型分離層、
をさらに有し、
前記第1窒化物半導体層が、
前記p型分離層の表面側の第1部分と、
前記p型分離層の裏面側の第2部分と、
前記第1部分と前記第2部分を接続する接続部、
を有し、
前記ソース電極が、前記p型分離層の表面側の位置に配置されており、
前記p型半導体層が、前記接続部の表面側の位置に配置されている、
請求項1〜9の何れか一項の窒化物半導体装置。
Priority Applications (6)
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JP2015129137A JP6222174B2 (ja) | 2015-06-26 | 2015-06-26 | 窒化物半導体装置 |
US15/149,528 US10186591B2 (en) | 2015-06-26 | 2016-05-09 | Nitride semiconductor device |
TW105118990A TWI591821B (zh) | 2015-06-26 | 2016-06-16 | 氮化物半導體裝置 |
DE102016111400.6A DE102016111400B4 (de) | 2015-06-26 | 2016-06-22 | Nitridhalbleitereinrichtung |
KR1020160077808A KR101850604B1 (ko) | 2015-06-26 | 2016-06-22 | 질화물 반도체 장치 |
CN201610472248.7A CN106298907B (zh) | 2015-06-26 | 2016-06-24 | 氮化物半导体装置 |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019024056A (ja) * | 2017-07-24 | 2019-02-14 | 株式会社豊田中央研究所 | 半導体装置 |
JP2019047122A (ja) * | 2017-09-01 | 2019-03-22 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツングRobert Bosch Gmbh | 電界効果トランジスタ及び電界効果トランジスタを製造する方法 |
WO2021215336A1 (ja) * | 2020-04-23 | 2021-10-28 | ローム株式会社 | 窒化物半導体装置 |
JP2022553146A (ja) * | 2020-04-20 | 2022-12-22 | 華為技術有限公司 | 窒化ガリウムデバイス及びその駆動回路 |
JP7571935B2 (ja) | 2020-08-10 | 2024-10-23 | 華為技術有限公司 | ハイブリッドゲート電界効果トランジスタ、ハイブリッドゲート電界効果トランジスタを製造する方法、及びスイッチ回路 |
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Publication number | Priority date | Publication date | Assignee | Title |
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US10249725B2 (en) * | 2016-08-15 | 2019-04-02 | Delta Electronics, Inc. | Transistor with a gate metal layer having varying width |
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JP6222174B2 (ja) | 2017-11-01 |
CN106298907B (zh) | 2019-07-09 |
US10186591B2 (en) | 2019-01-22 |
TWI591821B (zh) | 2017-07-11 |
KR20170001612A (ko) | 2017-01-04 |
US20160380091A1 (en) | 2016-12-29 |
KR101850604B1 (ko) | 2018-04-19 |
CN106298907A (zh) | 2017-01-04 |
TW201703253A (zh) | 2017-01-16 |
DE102016111400B4 (de) | 2019-10-02 |
DE102016111400A1 (de) | 2016-12-29 |
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