JP6012904B1 - 半導体装置及び半導体装置の製造方法 - Google Patents
半導体装置及び半導体装置の製造方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 65
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 33
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 437
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 434
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000012535 impurity Substances 0.000 claims description 74
- 150000002500 ions Chemical class 0.000 claims description 20
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims 1
- 238000003763 carbonization Methods 0.000 claims 1
- 229910052710 silicon Inorganic materials 0.000 claims 1
- 239000010703 silicon Substances 0.000 claims 1
- 239000010410 layer Substances 0.000 description 426
- 239000010408 film Substances 0.000 description 72
- 239000000758 substrate Substances 0.000 description 31
- 238000005468 ion implantation Methods 0.000 description 15
- 230000015572 biosynthetic process Effects 0.000 description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 230000007423 decrease Effects 0.000 description 6
- 239000002019 doping agent Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000002344 surface layer Substances 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000002513 implantation Methods 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 230000004913 activation Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 230000008021 deposition Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
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- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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Abstract
Description
<構成>
図1は、本実施形態に関する半導体装置の構造を示す断面図である。
図2から図5は、本実施形態に関する半導体装置の各製造工程における状態を示す断面図である。
次に、温度係数が正である抵抗体となる第2炭化珪素層5の別の製造方法について説明する。
図6は、本実施形態に関する半導体装置の、アノード電極からの厚さ方向における炭化珪素層のp型及びn型の不純物濃度のプロファイルを示す図である。アノード電極側から見て、アノード電極とオーミックコンタクトを形成する第3炭化珪素層6、温度係数が正である抵抗体として機能する第2炭化珪素層5、第1炭化珪素層4及び炭化珪素ドリフト層3が順に積層されている。
以下に、本実施形態による効果を例示する。
<構成>
以下では、上記実施形態で説明された構成と同様の構成については同じ符号を付して図示し、その詳細な説明については適宜省略する。
図8から図13は、本実施形態に関する半導体装置の各製造工程における状態を示す断面図である。
本実施形態では、第3炭化珪素層6aと、第2炭化珪素層5aと、第1炭化珪素層4aと、炭化珪素ドリフト層3aとをエピタキシャル成長によって積層して形成しているが、以下に、第2炭化珪素層5aを形成する別の形成方法について説明する。
以下に、本実施形態による効果を例示する。
上記各実施形態では、各構成要素の材質、材料、寸法、形状、相対的配置関係又は実施の条件などについても記載している場合があるが、これらはすべての局面において例示であって、本明細書に記載されたものに限られることはない。よって、例示されていない無数の変形例が、本技術の範囲内において想定される。例えば、任意の構成要素を変形する場合、追加する場合又は省略する場合、さらには、少なくとも1つの実施形態における少なくとも1つの構成要素を抽出し、他の実施形態の構成要素と組み合わせる場合が含まれる。
Claims (2)
- pn接合を介して電流が流れるバイポーラデバイスであり、
第1導電型の炭化珪素ドリフト層と、
前記炭化珪素ドリフト層上に形成された第2導電型の第1炭化珪素層と、
前記第1炭化珪素層上に形成された第2導電型の第2炭化珪素層と、
前記第2炭化珪素層上に形成された第2導電型の第3炭化珪素層とを備え、
前記第2炭化珪素層は、抵抗の温度係数が正であり、
前記第2炭化珪素層は、前記第1炭化珪素層よりも不純物濃度が低く、
前記第3炭化珪素層は、前記第2炭化珪素層よりも不純物濃度が高く、
前記第2炭化珪素層の不純物濃度は、前記第3炭化珪素層側の領域よりも第1炭化珪素層側の領域のほうが低い、
半導体装置。 - pn接合を介して電流が流れるバイポーラデバイスの製造方法であり、
第1導電型の炭化珪素ドリフト層を形成し、
前記炭化珪素ドリフト層上に第2導電型の炭化珪素層を形成し、
前記炭化珪素層の一部に第1導電型のイオンを注入することで、前記炭化珪素層のうち前記炭化珪素ドリフト層側の層を第1炭化珪素層として、前記炭化珪素層のうち前記炭化珪素ドリフト層側とは反対側の層を第2炭化珪素層としてそれぞれ形成し、
前記第2炭化珪素層が、抵抗の温度係数が正である、
半導体装置の製造方法。
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PCT/JP2015/072196 WO2016113938A1 (ja) | 2015-01-14 | 2015-08-05 | 半導体装置及び半導体装置の製造方法 |
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JP (1) | JP6012904B1 (ja) |
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US10629687B2 (en) | 2018-03-02 | 2020-04-21 | Kabushiki Kaisha Toshiba | Silicon carbide semiconductor device |
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DE102016104256B3 (de) * | 2016-03-09 | 2017-07-06 | Infineon Technologies Ag | Transistorzellen und Kompensationsstruktur aufweisende Halbleitervorrichtung mit breitem Bandabstand |
CN116854477B (zh) * | 2023-07-04 | 2024-05-24 | 北京亦盛精密半导体有限公司 | 一种各向异性电阻率的碳化硅陶瓷及其制备方法、碳化硅薄片类制件 |
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US10177228B2 (en) | 2019-01-08 |
CN107112369B (zh) | 2020-06-26 |
CN107112369A (zh) | 2017-08-29 |
US20170373152A1 (en) | 2017-12-28 |
WO2016113938A1 (ja) | 2016-07-21 |
JPWO2016113938A1 (ja) | 2017-04-27 |
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