JP2017010986A - 炭化珪素半導体装置の製造方法 - Google Patents
炭化珪素半導体装置の製造方法 Download PDFInfo
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- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims abstract description 168
- 229910010271 silicon carbide Inorganic materials 0.000 title claims abstract description 166
- 239000004065 semiconductor Substances 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 60
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 48
- 239000000758 substrate Substances 0.000 claims abstract description 121
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 74
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 66
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 66
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 54
- 239000010703 silicon Substances 0.000 claims abstract description 54
- 230000001681 protective effect Effects 0.000 claims abstract description 53
- 238000010438 heat treatment Methods 0.000 claims abstract description 51
- 230000004913 activation Effects 0.000 claims abstract description 37
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 24
- 239000007789 gas Substances 0.000 claims description 17
- 239000012298 atmosphere Substances 0.000 claims description 13
- 229910052786 argon Inorganic materials 0.000 claims description 12
- 239000012535 impurity Substances 0.000 claims description 12
- 238000004544 sputter deposition Methods 0.000 claims description 12
- 230000008020 evaporation Effects 0.000 claims description 8
- 238000001704 evaporation Methods 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 7
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 claims description 7
- 230000002950 deficient Effects 0.000 claims description 4
- 230000003213 activating effect Effects 0.000 claims description 3
- 238000002513 implantation Methods 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 claims description 3
- 230000003746 surface roughness Effects 0.000 abstract description 14
- 238000005468 ion implantation Methods 0.000 description 50
- 238000001994 activation Methods 0.000 description 34
- 230000008569 process Effects 0.000 description 9
- 238000012545 processing Methods 0.000 description 9
- 239000000126 substance Substances 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 5
- 238000004380 ashing Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 235000004522 Pentaglottis sempervirens Nutrition 0.000 description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 238000003705 background correction Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000001755 magnetron sputter deposition Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 240000004050 Pentaglottis sempervirens Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000004937 angle-resolved X-ray photoelectron spectroscopy Methods 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 238000000089 atomic force micrograph Methods 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/0445—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising crystalline silicon carbide
- H01L21/045—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising crystalline silicon carbide passivating silicon carbide surfaces
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
- H01L22/10—Measuring as part of the manufacturing process
- H01L22/12—Measuring as part of the manufacturing process for structural parameters, e.g. thickness, line width, refractive index, temperature, warp, bond strength, defects, optical inspection, electrical measurement of structural dimensions, metallurgic measurement of diffusions
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- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/0445—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising crystalline silicon carbide
- H01L21/0455—Making n or p doped regions or layers, e.g. using diffusion
- H01L21/046—Making n or p doped regions or layers, e.g. using diffusion using ion implantation
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
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- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/324—Thermal treatment for modifying the properties of semiconductor bodies, e.g. annealing, sintering
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- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/12—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/16—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed including, apart from doping materials or other impurities, only elements of Group IV of the Periodic Table
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Abstract
Description
実施の形態にかかる炭化珪素半導体装置の製造方法について説明する。図1Aは、実施の形態にかかる炭化珪素半導体装置の製造方法の概要を示すフローチャートである。図1Bは、実施の形態にかかる炭化珪素半導体装置の製造途中の状態を示す断面図である。まず、炭化珪素基板(半導体ウエハ)1を用意し、一般的な有機洗浄法やRCA洗浄法により洗浄する(ステップS1)。炭化珪素基板1は、例えば、(000−1)面(いわゆるC面)を結晶軸に対して例えば4°程度傾けた(オフ角を付けた)面をおもて面とする炭化珪素バルク基板であってもよい。また、炭化珪素基板1は、例えば、炭化珪素を材料とする出発基板上にエピタキシャル層を積層した炭化珪素エピタキシャル基板であってもよい。すなわち、炭化珪素基板1は、例えば四層周期六方晶(4H−SiC)などの炭化珪素を材料とする半導体基板である。
2 シリコン膜
3 カーボン膜
4 保護膜
Claims (10)
- 炭化珪素を材料とする半導体基板の表面から不純物をイオン注入する注入工程と、
前記半導体基板の不純物をイオン注入した表面に保護膜を形成する形成工程と、
前記保護膜で覆われた状態の前記半導体基板に熱処理して前記不純物を活性化させる活性化工程と、
を含み、
前記形成工程では、
前記半導体基板の表面に形成され、前記熱処理により前記半導体基板に不足する原子を供給する第1保護膜と、
前記第1保護膜の表面に形成され、前記熱処理時に前記半導体基板および前記第1保護膜からのシリコン原子の蒸発を抑制する第2保護膜と、の2層構造の前記保護膜を形成することを特徴とする炭化珪素半導体装置の製造方法。 - 前記第1保護膜は、シリコン膜であることを特徴とする請求項1に記載の炭化珪素半導体装置の製造方法。
- 前記第2保護膜は、カーボン膜または窒化カーボン膜であることを特徴とする請求項1または2に記載の炭化珪素半導体装置の製造方法。
- シリコンターゲットを用いて、アルゴンガス雰囲気でのスパッタリングにより前記第1保護膜を形成することを特徴とする請求項1〜3のいずれか一つに記載の炭化珪素半導体装置の製造方法。
- 前記第1保護膜の厚さは、1nm以上3nm以下であることを特徴とする請求項1〜4のいずれか一つに記載の炭化珪素半導体装置の製造方法。
- カーボンターゲットを用いて、アルゴンガス雰囲気または窒素を含むアルゴンガス雰囲気でのスパッタリングにより前記第2保護膜を形成することを特徴とする請求項1〜5のいずれか一つに記載の炭化珪素半導体装置の製造方法。
- 前記第2保護膜の厚さは、20nm以上であることを特徴とする請求項1〜6のいずれか一つに記載の炭化珪素半導体装置の製造方法。
- 前記活性化工程の後、前記第2保護膜を除去する除去工程をさらに含むことを特徴とする請求項1〜7のいずれか一つに記載の炭化珪素半導体装置の製造方法。
- 前記除去工程の後にX線光電子分光法を用いて前記半導体基板の前記不純物をイオン注入した表面を分析した場合に、前記半導体基板の表面に検出される炭素のピークの強度が炭化珪素のピークの強度よりも小さくなるように、前記第1保護膜の厚さを設定することを特徴とする請求項8に記載の炭化珪素半導体装置の製造方法。
- 前記除去工程の後にX線光電子分光法を用いてX線入射角度45°で前記半導体基板の前記不純物をイオン注入した表面を分析した場合に、結合エネルギー283eV〜284eVにあらわれる前記炭化珪素のピークの強度に対して、結合エネルギー285eV〜286eVにあらわれるsp2結合の前記炭素のピークの強度の比率が0.4以下となるように、前記第1保護膜の厚さを設定することを特徴とする請求項9に記載の炭化珪素半導体装置の製造方法。
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JP2015122083A JP6507875B2 (ja) | 2015-06-17 | 2015-06-17 | 炭化珪素半導体装置の製造方法 |
CN201610121660.4A CN106257619B (zh) | 2015-06-17 | 2016-03-04 | 碳化硅半导体装置的制造方法 |
US15/067,163 US9748149B2 (en) | 2015-06-17 | 2016-03-10 | Method of manufacturing a silicon carbide semiconductor device including forming a protective film with a 2-layer structure comprised of silicon and carbon |
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CN109494150B (zh) * | 2018-11-21 | 2021-06-08 | 北京国联万众半导体科技有限公司 | 碳化硅高温退火表面保护的制作方法及碳化硅功率器件 |
CN110223996A (zh) * | 2019-06-20 | 2019-09-10 | 德淮半导体有限公司 | 晶圆组件及其形成方法 |
WO2021119000A1 (en) * | 2019-12-09 | 2021-06-17 | Entegris, Inc. | Diffusion barriers made from multiple barrier materials, and related articles and methods |
KR20210146164A (ko) * | 2020-05-26 | 2021-12-03 | 삼성전자주식회사 | 엑스선 광전자 분광법을 이용한 그래핀층의 두께 계산방법 및 실리콘 카바이드의 함량 측정 방법 |
CN113811107B (zh) * | 2020-06-11 | 2023-05-26 | 维达力科技股份有限公司 | 壳体的制备方法、壳体以及电子产品 |
CN113897684B (zh) * | 2020-06-22 | 2023-08-08 | 比亚迪股份有限公司 | 碳化硅籽晶、碳化硅籽晶组件及其制备方法和制备碳化硅晶体的方法 |
CN117476543A (zh) * | 2023-10-30 | 2024-01-30 | 汇能微电子技术(深圳)有限公司 | 碳化硅半导体结构及其制备方法、碳化硅半导体器件 |
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JP2000012482A (ja) * | 1998-06-22 | 2000-01-14 | Fuji Electric Co Ltd | 炭化けい素半導体素子の製造方法 |
JP2007001800A (ja) * | 2005-06-23 | 2007-01-11 | Sumitomo Electric Ind Ltd | 炭化ケイ素基板の表面再構成方法 |
JP2012142484A (ja) * | 2011-01-05 | 2012-07-26 | National Institute Of Advanced Industrial & Technology | 炭化珪素半導体デバイスの作製方法 |
JP2012146795A (ja) * | 2011-01-11 | 2012-08-02 | Toyota Central R&D Labs Inc | 半導体装置の製造方法 |
JP2014216571A (ja) * | 2013-04-26 | 2014-11-17 | 株式会社豊田自動織機 | 半導体基板の製造方法および半導体基板 |
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