JP2012018961A - 半導体装置 - Google Patents
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Abstract
【解決手段】半導体装置は、基板と、基板上に形成され、かつヘテロ接合に基づくキャリア走行層を有する化合物半導体層と、化合物半導体層上に形成される第1の主電極14と、化合物半導体層上において平面的に見て第1の主電極14を包囲するように形成され、かつ直線領域と円弧領域とを有する第2の主電極15と、化合物半導体層上において第1の主電極及び第2の主電極に対向するように形成された制御電極16と、を備え、第1の主電極及び第2の主電極の間に電流が流れる半導体装置であって、第1の主電極と第2の主電極の円弧領域との間に電流制限部19を設けた。
【選択図】図2
Description
第2の半導体装置(請求項2に対応)は、上記の構成において、好ましくは、電流制限部は、第1の主電極と第2の主電極の円弧領域との間に形成される二次元キャリアガス層のキャリア濃度を部分的に低減した部分であることを特徴とする。
第3の半導体装置(請求項3に対応)は、上記の構成において、好ましくは、電流制限部は、第1の主電極と第2の主電極の円弧領域との間の制御電極直下の二次元キャリアガス層のキャリア濃度を部分的に低減した部分であることを特徴とする。
第4の半導体装置(請求項4に対応)は、上記の構成において、好ましくは、電流制限部は、第1の主電極と第2の主電極の円弧領域との間の二次元キャリアガス層を除去した部分であることを特徴とする。
第5の半導体装置(請求項5に対応)は、上記の構成において、好ましくは、化合物半導体層は、二次元キャリアガス層を含むキャリア走行層と、該キャリア走行層上にヘテロ接合をなすように形成されるキャリア供給層と、を備え、電流制限部は、第1の主電極と第2の主電極の円弧領域との間のキャリア供給層を部分的に薄くした部分であることを特徴とする。
第6の半導体装置(請求項6に対応)は、上記の構成において、好ましくは、電流制限部は、第1の主電極と第2の主電極の円弧領域との間のキャリア走行層に接合する化合物半導体層にフッ素イオンをドーピングした部分であることを特徴とする。
第7の半導体装置(請求項7に対応)は、上記の構成において、好ましくは、電流制限部は、第1の主電極と第2の主電極の円弧領域との間のキャリア走行層に接合した化合物半導体層のp型半導体層部分であることを特徴とする。
図7と図8は、本発明の第1の実施形態の変形例に係る窒化物系化合物半導体装置を示す図である。図7は、第1の実施形態での図2に対応する図である。図8は、図7のD−D断面図である。図7と図8に示した窒化物系化合物半導体装置は、電流制限部30が、第1の主電極14と第2の主電極15の円弧領域15bとの間の制御電極16の直下以外の二次元キャリアガス層21も部分的に除去した部分であることが、図1〜図6で示した本発明の第1の実施形態と異なる。その他の構成については、図1〜図6で示した本発明の第1の実施形態に係る窒化物系化合物半導体装置と同様である。
11 キャリア走行層
12 半導体層
13 主面
14 第1の主電極(ドレイン電極)
15 第2の主電極(ソース電極)
16 制御電極
17 キャリア供給層
18 基板
19 電流制限部
20 バッファ層
21 二次元キャリアガス層
Claims (7)
- 基板と、該基板上に形成され、かつヘテロ接合に基づく二次元キャリアガス層を有する化合物半導体層と、
前記化合物半導体層上に形成される第1の主電極と、
前記化合物半導体層上において平面的に見て前記第1の主電極を包囲するように形成され、かつ直線領域と円弧領域とを有する第2の主電極と、
前記化合物半導体層上において前記第1の主電極及び前記第2の主電極の間に形成された制御電極と、を備え、前記二次元キャリアガス層を介して前記第1の主電極及び前記第2の主電極の間に電流が流れる半導体装置であって、
前記第1の主電極と前記第2の主電極の円弧領域との間に電流の流れを抑制する電流制限部を設けたことを特徴とする半導体装置。 - 前記電流制限部は、前記第1の主電極と前記第2の主電極の円弧領域との間に形成される二次元キャリアガス層のキャリア濃度を部分的に低減した部分であることを特徴とする請求項1に記載の半導体装置。
- 前記電流制限部は、前記第1の主電極と前記第2の主電極の円弧領域との間の前記制御電極直下の二次元キャリアガス層のキャリア濃度を部分的に低減した部分であることを特徴とする請求項1又は2に記載の半導体装置。
- 前記電流制限部は、前記第1の主電極と前記第2の主電極の円弧領域との間の二次元キャリアガス層を除去した部分であることを特徴とする請求項1〜3のいずれか1項に記載の半導体装置。
- 前記化合物半導体層は、前記二次元キャリアガス層を含むキャリア走行層と、該キャリア走行層上にヘテロ接合をなすように形成されるキャリア供給層と、を備え、前記電流制限部は、前記第1の主電極と前記第2の主電極の円弧領域との間の前記キャリア供給層を部分的に薄くした部分であることを特徴とする請求項1〜4のいずれか1項に記載の半導体装置。
- 前記電流制限部は、前記第1の主電極と前記第2の主電極の円弧領域との間の前記キャリア走行層に接合する化合物半導体層にフッ素イオンをドーピングした部分であることを特徴とする請求項1〜4のいずれか1項に記載の半導体装置。
- 前記電流制限部は、前記第1の主電極と前記第2の主電極の円弧領域との間の前記キャリア走行層に接合した化合物半導体層のp型半導体層部分であることを特徴とする請求項1〜4のいずれか1項に記載の半導体装置。
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JP2010153744A JP5776143B2 (ja) | 2010-07-06 | 2010-07-06 | 半導体装置 |
US13/243,600 US20120032232A1 (en) | 2010-07-06 | 2011-09-23 | Semiconductor device |
US13/962,899 US9153682B2 (en) | 2010-07-06 | 2013-08-08 | Semiconductor device |
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Cited By (5)
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JP2013207082A (ja) * | 2012-03-28 | 2013-10-07 | Toshiba Corp | 窒化物半導体ショットキダイオードおよびその製造方法 |
WO2014199671A1 (ja) * | 2013-06-13 | 2014-12-18 | シャープ株式会社 | ヘテロ接合電界効果トランジスタ |
JP2017063120A (ja) * | 2015-09-25 | 2017-03-30 | サンケン電気株式会社 | 半導体装置 |
US9923069B1 (en) | 2017-02-28 | 2018-03-20 | Panasonic Intellectual Property Management Co., Ltd. | Nitride semiconductor device |
US11276778B2 (en) | 2019-12-03 | 2022-03-15 | Kabushiki Kaisha Toshiba | Semiconductor device |
Families Citing this family (6)
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JP4794655B2 (ja) * | 2009-06-09 | 2011-10-19 | シャープ株式会社 | 電界効果トランジスタ |
US9379231B2 (en) * | 2012-02-17 | 2016-06-28 | Infineon Technologies Americas Corp. | Transistor having increased breakdown voltage |
US9070755B2 (en) | 2012-02-17 | 2015-06-30 | International Rectifier Corporation | Transistor having elevated drain finger termination |
JP2017092083A (ja) * | 2015-11-02 | 2017-05-25 | 富士通株式会社 | 化合物半導体装置及びその製造方法 |
CN105895686A (zh) * | 2016-01-21 | 2016-08-24 | 苏州能讯高能半导体有限公司 | 高电子迁移率晶体管器件及其制造方法 |
US9882041B1 (en) * | 2016-11-17 | 2018-01-30 | Texas Instruments Incorporated | HEMT having conduction barrier between drain fingertip and source |
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JP2017063120A (ja) * | 2015-09-25 | 2017-03-30 | サンケン電気株式会社 | 半導体装置 |
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US11276778B2 (en) | 2019-12-03 | 2022-03-15 | Kabushiki Kaisha Toshiba | Semiconductor device |
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US9153682B2 (en) | 2015-10-06 |
JP5776143B2 (ja) | 2015-09-09 |
US20130328107A1 (en) | 2013-12-12 |
US20120032232A1 (en) | 2012-02-09 |
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