JP2017157711A - 半導体装置 - Google Patents
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 123
- 150000004767 nitrides Chemical class 0.000 claims abstract description 73
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 40
- 239000000758 substrate Substances 0.000 claims abstract description 25
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000003475 lamination Methods 0.000 abstract 2
- 239000010410 layer Substances 0.000 description 307
- 229910002601 GaN Inorganic materials 0.000 description 85
- 229910002704 AlGaN Inorganic materials 0.000 description 16
- 230000004048 modification Effects 0.000 description 16
- 238000012986 modification Methods 0.000 description 16
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 14
- 230000015556 catabolic process Effects 0.000 description 13
- 239000013078 crystal Substances 0.000 description 4
- 239000011229 interlayer Substances 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910003465 moissanite Inorganic materials 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000005533 two-dimensional electron gas Effects 0.000 description 1
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Abstract
Description
図3は、本実施形態の変形例1に従った半導体装置2の構成の一例を示す断面図である。変形例1による半導体装置2は、C−GaN層25と、C−GaN層55とをさらに備えている。変形例1による半導体装置2のその他の構成は、上記半導体装置1の対応する構成と同様でよい。
図4は、本実施形態の変形例2に従った半導体装置3の構成の一例を示す断面図である。変形例2による第2バッファ層100は、ud−GaN層22をさらに備えている。第8窒化物半導体層としてのud−GaN層22は、第1バッファ層20とC−GaN層25との間に設けられている。この場合、第9窒化物半導体膜としての第1バッファ層20は、基板10とud−GaN層22との間に介在する。変形例2による半導体装置2のその他の構成は、変形例2による半導体装置2の対応する構成と同様でよい。
Claims (7)
- 基板と、
前記基板の上方に設けられ、アルミニウムを含有する第1窒化物半導体層と、炭素を含有する第2窒化物半導体層と、炭素濃度が前記第2窒化物半導体層の炭素濃度よりも低い第3窒化物半導体層と、を含む積層部と、
前記積層部の上方に設けられ、炭素濃度が前記第2窒化物半導体層の炭素濃度よりも低く、前記第1〜第3窒化物半導体層よりも厚い第4窒化物半導体層と、
前記第4窒化物半導体層上に設けられ、アルミニウムを含有する第5窒化物半導体層と、
前記第5窒化物半導体層上に設けられた第1電極とを備えた半導体装置。 - 前記第1窒化物半導体層の炭素濃度は、1×1016/cm3〜1×1018/cm3であり、
前記第2窒化物半導体層の炭素濃度は、1×1018/cm3〜3×1019/cm3であり、
前記第3窒化物半導体層の炭素濃度は、1×1016/cm3〜1×1017/cm3である、請求項1に記載の半導体装置。 - 前記第1窒化物半導体層は、AlxGa(1−x)N(0<x≦1)層である、請求項1または請求項2に記載の半導体装置。
- 前記積層部において、前記第1窒化物半導体層は、前記第2窒化物半導体層上に設けられており、前記第3窒化物半導体層は、前記第1窒化物半導体層上、および、前記第2窒化物半導体層の下にそれぞれ設けられている、請求項1から請求項3のいずれか一項に記載の半導体装置。
- 前記積層部は、前記第2窒化物半導体層、前記第1窒化物半導体層、前記第3窒化物半導体層の順番に繰り返し積層されている、請求項4に記載の半導体装置。
- 前記積層部において、前記第1窒化物半導体層は、前記第2窒化物半導体層上に設けられており、
前記第2窒化物半導体層は、前記第1窒化物半導体層上にも設けられており、
前記第3窒化物半導体層は、前記第1窒化物半導体層の下にある前記第2窒化物半導体層の下に設けられている、請求項1から請求項3のいずれか一項に記載の半導体装置。 - 前記積層部は、前記第2窒化物半導体層、前記第1窒化物半導体層、前記第2窒化物半導体層、前記第3窒化物半導体層の順番に繰り返し積層されている、請求項6に記載の半導体装置。
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JP2016040160A JP2017157711A (ja) | 2016-03-02 | 2016-03-02 | 半導体装置 |
US15/243,477 US20170256637A1 (en) | 2016-03-02 | 2016-08-22 | Semiconductor device |
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WO2016143265A1 (ja) * | 2015-03-11 | 2016-09-15 | パナソニック株式会社 | 窒化物半導体装置 |
US11848362B2 (en) * | 2019-04-18 | 2023-12-19 | Intel Corporation | III-N transistors with contacts of modified widths |
CN112242441A (zh) * | 2019-07-16 | 2021-01-19 | 联华电子股份有限公司 | 高电子迁移率晶体管 |
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US8796738B2 (en) * | 2011-09-21 | 2014-08-05 | International Rectifier Corporation | Group III-V device structure having a selectively reduced impurity concentration |
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