JP2019004084A - 半導体装置 - Google Patents
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Abstract
Description
図1に半導体装置100の模式断面図を示す。
半導体装置100は、炭化ケイ素(SiC)上に形成されたGaN系半導体で構成される電界効果トランジスタ(Field Effect Transistor:FET)である。
図2に半導体装置101を示す。
図3に半導体装置102を示す。
図4(a)に半導体装置103、図4(b)に図4(a)の点線で囲んだ部分の拡大図を示す。
2 第2の半導体層
3 第3の半導体層
4 ドレイン電極
5 ソース電極
6 導通電極
7 ゲート電極
8 第1の絶縁層
9 第2の領域
10 第3の領域
10a 第5の領域
10b 第6の領域
11 第4の領域
12 バッファ層
13 第2の絶縁層
14 第1の領域
15 第7の領域
100〜105 半導体装置
Claims (18)
- 炭化ケイ素である第1の半導体層と、
窒化物半導体である第2の半導体層と、
前記第2の半導体層に接し、前記第1の半導体層と前記第2の半導体層の間にあり、かつ窒化物半導体である第3の半導体層と、
前記第1の半導体層の前記第3の半導体層がある側とは反対側にあるドレイン電極と、
前記第2の半導体層の前記第3の半導体層がある側とは反対側にあって、第1の凸部を有し、前記第1の凸部は前記第2の半導体層および前記第3の半導体層のそれぞれを貫通し、前記第1の凸部の先端は前記第1の半導体層の内部に位置するソース電極と、
前記第2の半導体層の前記第3の半導体層がある側とは反対側にあって、第2の凸部を有し、前記第2の凸部は前記第2の半導体層および前記第3の半導体層のそれぞれを貫通し、前記第2の凸部の先端は前記第1の半導体層の内部に位置する導通電極と、
前記第2の半導体層の前記第3の半導体層がある側とは反対側にあって、前記ソース電極と前記導通電極の間にあるゲート電極と、
前記ゲート電極と前記第2の半導体層の間にある第1の絶縁層と、
前記第1の半導体層に含まれ、第1の導電型である第1の領域と、
前記第1の半導体層に含まれ、前記第1の領域と前記ドレイン電極の間にあり、かつ第2の導電型である第2の領域と、
前記第1の半導体層に含まれ、前記導通電極の前記第2の凸部と前記第1の領域の間にあり、かつ第2の導電型である第3の領域と、
前記第1の半導体層に含まれ、前記第3の半導体層と前記第1の領域の間にあって、前記ソース電極と前記導通電極の間にあり、かつ第1の導電型である第4の領域と、
を備える半導体装置。 - 前記ゲート電極はさらに第3の凸部を有し、前記ゲート電極の前記第3の凸部は前記第2の半導体層の内部に位置し、前記第3の半導体層に達している請求項1に記載の半導体装置。
- 前記導通電極の前記第2の凸部と前記第3の半導体層の間にある第2の絶縁層をさらに備える請求項1または請求項2に記載の半導体装置。
- 前記第3の領域は第5の領域と第6の領域をさらに含み、
前記ソース電極から前記導通電極に向かう方向に前記第5の領域と前記第6の領域が交互に位置している請求項1ないし請求項3のいずれか1項に記載の半導体装置。 - 前記ソース電極を間に挟んで前記導通電極がある側とは反対側の第1の半導体層に前記第4の領域は複数あり、複数の前記第4の導電型の領域は互いに離間している請求項1ないし請求項4のいずれか1項に記載の半導体装置。
- 前記ソース電極を間に挟んで前記導通電極がある側とは反対側の第1の半導体層にあって、前記第4の領域と隣接する第7の領域をさらに備える請求項1ないし請求項5のいずれか1項に記載の半導体装置。
- 前記第2の半導体層はAlxGa(1−x)N(0<x≦1)である請求項1ないし請求項6のいずれか1項に記載の半導体装置。
- 前記第3の半導体層はGaNである請求項1ないし請求項7のいずれか1項に記載の半導体装置。
- 第2の半導体層は、第3の半導体層3よりもバンドギャップの大きい請求項1ないし請求項8のいずれか1項に記載の半導体装置。
- 前記第1の領域は低濃度のn型である請求項1ないし請求項9のいずれか1項に記載の半導体装置。
- 前記第2の領域、前記第3の領域、および前記第5の領域は高濃度のn型である請求項1ないし請求項10のいずれか1項に記載の半導体装置。
- 前記第4の領域、前記第6の領域、前記第7の領域はp型である請求項1ないし請求項11のいずれか1項に記載の半導体装置。
- 前記第1の領域の導電型不純物濃度は1015cm−3以上1017cm−3である請求項10に記載の半導体装置。
- 前記第2の領域の導電型不純物濃度は1018cm−3以上1020cm−3以下である。第1の半導体層からである請求項11に記載の半導体装置。
- 前記第3の領域の導電型不純物濃度は1018cm−3以上1020cm−3以下である請求項11に記載の半導体装置。
- 前記第4の領域の導電型不純物濃度は1015cm−3以上1020cm−3以下である請求項12に記載の半導体装置。
- 前記導通電極はNi、Ti、Al、およびAuを含む請求項1ないし請求項16のいずれか1項に記載の半導体装置。
- 前記ゲート電極はTiNである請求項1ないし請求項17のいずれか1項に記載の半導体装置。
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| JP2017118990A JP6905395B2 (ja) | 2017-06-16 | 2017-06-16 | 半導体装置 |
| CN201810172985.4A CN109148573A (zh) | 2017-06-16 | 2018-03-02 | 半导体装置 |
| US15/912,028 US10158012B1 (en) | 2017-06-16 | 2018-03-05 | Semiconductor device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111106163A (zh) * | 2019-12-27 | 2020-05-05 | 英诺赛科(珠海)科技有限公司 | 半导体器件及其制造方法 |
| DE112022005863T5 (de) | 2021-12-09 | 2024-09-26 | National Institute Of Advanced Industrial Science And Technology | Halbleitervorrichtung |
| WO2025046981A1 (ja) * | 2023-08-28 | 2025-03-06 | パナソニックホールディングス株式会社 | 窒化物半導体デバイス |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115832040A (zh) * | 2022-11-11 | 2023-03-21 | 深圳天狼芯半导体有限公司 | 碳化硅基氮化镓器件及其制备方法 |
| CN115799330A (zh) * | 2022-11-11 | 2023-03-14 | 深圳天狼芯半导体有限公司 | 耐高压hemt器件及其制备方法 |
| CN115799329A (zh) * | 2022-11-11 | 2023-03-14 | 深圳天狼芯半导体有限公司 | 高压超结hemt器件及其制备方法 |
| CN115832042A (zh) * | 2022-11-11 | 2023-03-21 | 深圳天狼芯半导体有限公司 | 耐高压氮化镓开关器件及其制备方法、芯片 |
| CN120076368A (zh) * | 2023-11-16 | 2025-05-30 | 镓合半导体(上海)有限公司 | 一种高耐压hemt器件、及其驱动方法 |
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| DE112022005863T5 (de) | 2021-12-09 | 2024-09-26 | National Institute Of Advanced Industrial Science And Technology | Halbleitervorrichtung |
| WO2025046981A1 (ja) * | 2023-08-28 | 2025-03-06 | パナソニックホールディングス株式会社 | 窒化物半導体デバイス |
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| US20180366571A1 (en) | 2018-12-20 |
| JP6905395B2 (ja) | 2021-07-21 |
| CN109148573A (zh) | 2019-01-04 |
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