JP2018056298A - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 218
- 150000004767 nitrides Chemical class 0.000 claims abstract description 7
- 210000000746 body region Anatomy 0.000 claims description 37
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical group [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 11
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 8
- 230000015556 catabolic process Effects 0.000 abstract description 14
- 239000010410 layer Substances 0.000 description 83
- 230000005684 electric field Effects 0.000 description 16
- 239000000758 substrate Substances 0.000 description 15
- 239000012535 impurity Substances 0.000 description 11
- 238000012986 modification Methods 0.000 description 8
- 230000004048 modification Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000011229 interlayer Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000001747 exhibiting effect Effects 0.000 description 3
- 238000005468 ion implantation Methods 0.000 description 3
- 230000001678 irradiating effect Effects 0.000 description 3
- 230000005533 two-dimensional electron gas Effects 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 108091006149 Electron carriers Proteins 0.000 description 1
- 229910002601 GaN Inorganic materials 0.000 description 1
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- RNQKDQAVIXDKAG-UHFFFAOYSA-N aluminum gallium Chemical compound [Al].[Ga] RNQKDQAVIXDKAG-UHFFFAOYSA-N 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 230000027756 respiratory electron transport chain Effects 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
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Abstract
【解決手段】半導体装置1は、窒化物半導体層20の表面上の一部に設けられているP型半導体領域42を備える。P型半導体領域42は、縦型ドリフト領域21bが窒化物半導体層20の表面に露出する範囲の少なくとも一部に対向する。
【選択図】図1
Description
図2に示す変形例の半導体装置2は、P型半導体領域42が絶縁ゲート部36のゲート電極36bにオーミック接触することを特徴とする。この変形例では、半導体装置2がオンのときに、P型半導体領域42と縦型ドリフト領域21bの接合面が順バイアスされ、P型半導体領域42からドリフト領域21内に正孔が注入される。これにより、ドリフト領域21内で伝導度変調が起きるので、ドリフト抵抗が低下する。半導体装置1は、低いオン抵抗を有することができる。
図3に示す変形例の半導体装置3は、P型半導体領域42と縦型ドリフト領域21bの間に設けられているN型又はI型の中間半導体領域44を備えることを特徴とする。ここで、半導体装置3では、半導体基板10、半導体層20及びP型半導体領域42が窒化ガリウム(GaN)を材料としており、中間半導体領域44が窒化アルミニウムガリウム(AlGaN)を材料としている。このため、中間半導体領域44と縦型ドリフト領域21bがヘテロ接合しており、半導体装置3がオンのとき、縦型ドリフト領域21bの表面部に2次元電子ガスが生成する。2次元電子ガスには高密度な電子キャリアが存在するので、縦型ドリフト領域21bの表面部の電気抵抗が大きく低下する。これにより、半導体装置3のオン抵抗が低下する。
10:半導体基板
20:半導体層
21:ドリフト領域
21a:横型ドリフト領域
21b:縦型ドリフト領域
23:ボディ領域
24:コンタクト領域
25:ソース領域
32:ドレイン電極
34:ソース電極
36:絶縁ゲート部
36a:ゲート絶縁膜
36b:ゲート電極
42:P型半導体領域
52:層間絶縁膜
Claims (5)
- 半導体層と、
前記半導体層の一方の主面上の一部に設けられている絶縁ゲート部と、
前記半導体層の前記主面上の他の一部に設けられている第1導電型半導体領域と、を備えており、
前記半導体層は、
前記主面に露出する第2導電型の縦型ドリフト領域と、
前記縦型ドリフト領域に隣接しており、前記主面に露出する第1導電型のボディ領域と、
前記ボディ領域によって前記縦型ドリフト領域から隔てられており、前記主面に露出する第2導電型のソース領域と、を有しており、
前記絶縁ゲート部は、前記縦型ドリフト領域と前記ソース領域を隔てている前記ボディ領域に対向しており、
前記第1導電型半導体領域は、前記縦型ドリフト領域が前記半導体層の前記主面に露出する範囲の少なくとも一部に対向する、半導体装置。 - 前記第1導電型半導体領域は、前記縦型ドリフト領域が前記半導体層の前記主面に露出する範囲の一部に接触しており、前記縦型ドリフト領域によって前記ボディ領域から隔てられている、請求項1に記載の半導体装置。
- 前記半導体層の前記主面を被覆するとともに前記ソース領域に電気的に接続するソース電極をさらに備えており、
前記第1導電型半導体領域が、前記ソース電極に電気的に接続する、請求項1又は2に記載の半導体装置。 - 前記第1導電型半導体領域が、前記絶縁ゲート部のゲート電極に電気的に接続する、請求項1又は2に記載の半導体装置。
- 前記半導体層が、炭化珪素又は窒化物半導体である、請求項1〜4のいずれか一項に記載の半導体装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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JP2016189852A JP6593294B2 (ja) | 2016-09-28 | 2016-09-28 | 半導体装置 |
US15/671,503 US10050108B2 (en) | 2016-09-28 | 2017-08-08 | Semiconductor device |
DE102017216923.0A DE102017216923B4 (de) | 2016-09-28 | 2017-09-25 | Halbleitervorrichtung |
CN201710883116.8A CN107871786B (zh) | 2016-09-28 | 2017-09-26 | 半导体装置 |
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JP2016189852A JP6593294B2 (ja) | 2016-09-28 | 2016-09-28 | 半導体装置 |
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JP2018056298A true JP2018056298A (ja) | 2018-04-05 |
JP6593294B2 JP6593294B2 (ja) | 2019-10-23 |
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US (1) | US10050108B2 (ja) |
JP (1) | JP6593294B2 (ja) |
CN (1) | CN107871786B (ja) |
DE (1) | DE102017216923B4 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019177121A (ja) * | 2018-03-30 | 2019-10-17 | 株式会社三洋物産 | 遊技機 |
JP2020031133A (ja) * | 2018-08-22 | 2020-02-27 | トヨタ自動車株式会社 | スイッチング素子 |
JP7529553B2 (ja) | 2020-12-11 | 2024-08-06 | 株式会社デンソー | 半導体装置とその製造方法 |
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JP2020031133A (ja) * | 2018-08-22 | 2020-02-27 | トヨタ自動車株式会社 | スイッチング素子 |
JP7110821B2 (ja) | 2018-08-22 | 2022-08-02 | 株式会社デンソー | スイッチング素子 |
JP7529553B2 (ja) | 2020-12-11 | 2024-08-06 | 株式会社デンソー | 半導体装置とその製造方法 |
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