JP2013120822A - 半導体装置の製造方法 - Google Patents
半導体装置の製造方法 Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 65
- 239000004065 semiconductor Substances 0.000 title claims abstract description 63
- 239000000758 substrate Substances 0.000 claims abstract description 80
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 9
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 26
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 229910052715 tantalum Inorganic materials 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 description 19
- 239000002184 metal Substances 0.000 description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 16
- 230000015556 catabolic process Effects 0.000 description 16
- 230000005684 electric field Effects 0.000 description 12
- 229910004298 SiO 2 Inorganic materials 0.000 description 8
- 235000012239 silicon dioxide Nutrition 0.000 description 8
- 239000000377 silicon dioxide Substances 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 238000002161 passivation Methods 0.000 description 5
- 150000002500 ions Chemical class 0.000 description 4
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 125000004433 nitrogen atom Chemical group N* 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005468 ion implantation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000001020 plasma etching Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 1
- 208000000541 Johanson-Blizzard syndrome Diseases 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910010038 TiAl Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 239000001272 nitrous oxide Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910001258 titanium gold Inorganic materials 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
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Abstract
【解決手段】JBS1の製造方法は、主表面10Aを含むようにn型領域を有し、炭化珪素からなる基板10を準備する工程と、主表面10Aを含む領域にp型領域を形成する工程と、p型領域が形成された基板10を、1250℃以上の温度で加熱することにより、n型領域からp型領域にわたり主表面10A上に酸化膜20を形成する工程と、主表面10Aの少なくとも一部が露出するように酸化膜20を除去する工程と、酸化膜20を除去することにより露出した主表面10A上に接触するショットキー電極50を形成する工程とを備えている。
【選択図】図7
Description
まず、本発明の一実施の形態である実施の形態1に係る半導体装置の製造方法について、図1〜図8を参照して説明する。図1を参照して、まず、工程(S10)として、基板準備工程が実施される。この工程(S10)では、以下に説明する工程(S11)および(S12)が実施されることにより、炭化珪素からなる基板10が準備される。
次に、本発明の他の実施の形態である実施の形態2に係る半導体装置の製造方法について説明する。本実施の形態に係る半導体装置の製造方法は、基本的には実施の形態1に係る半導体装置と同様に実施され、かつ同様の効果を奏する。しかし、本実施の形態に係る半導体装置の製造方法は、酸化膜を除去する工程において、基板の主表面の全面が露出するように酸化膜が除去されるという点で実施の形態1に係る半導体装置の製造方法とは異なっている。
Claims (7)
- 一方の主表面を含むように第1導電型領域を有し、炭化珪素からなる基板を準備する工程と、
前記主表面を含む領域に第2導電型領域を形成する工程と、
前記第2導電型領域が形成された前記基板を、1250℃以上の温度で加熱することにより、前記第1導電型領域から前記第2導電型領域にわたり前記主表面上に酸化膜を形成する工程と、
前記主表面の少なくとも一部が露出するように前記酸化膜を除去する工程と、
前記酸化膜を除去することにより露出した前記主表面上に接触するショットキー電極を形成する工程とを備える、半導体装置の製造方法。 - 前記酸化膜を形成する工程では、前記基板を1300℃以上の温度で加熱することにより、前記主表面上に前記酸化膜が形成される、請求項1に記載の半導体装置の製造方法。
- 前記酸化膜を除去する工程では、前記主表面の一部が露出するように前記酸化膜が除去され、
前記ショットキー電極を形成する工程では、前記酸化膜を除去することにより露出した前記主表面および前記酸化膜上に接触する前記ショットキー電極が形成される、請求項1または2に記載の半導体装置の製造方法。 - 前記酸化膜が除去される工程より前に、前記酸化膜が形成された前記基板を窒素を含む雰囲気中において加熱する工程をさらに備える、請求項3に記載の半導体装置の製造方法。
- 前記酸化膜を形成する工程では、0.1μm以上の厚みを有する前記酸化膜が形成される、請求項3または4に記載の半導体装置の製造方法。
- 前記酸化膜を除去する工程では、前記主表面の全面が露出するように前記酸化膜が除去される、請求項1または2に記載の半導体装置の製造方法。
- 前記ショットキー電極を形成する工程では、Ti、W、Mo、Ni、Ta、AlおよびAuからなる群より選択される少なくとも一を含む前記ショットキー電極が形成される、請求項1〜6のいずれか1項に記載の半導体装置の製造方法。
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JP2011267604A JP2013120822A (ja) | 2011-12-07 | 2011-12-07 | 半導体装置の製造方法 |
CN201280054480.9A CN103918081A (zh) | 2011-12-07 | 2012-10-29 | 制造半导体器件的方法 |
EP12854962.3A EP2790225B1 (en) | 2011-12-07 | 2012-10-29 | Method for manufacturing silicon carbide semiconductor device |
PCT/JP2012/077858 WO2013084620A1 (ja) | 2011-12-07 | 2012-10-29 | 半導体装置の製造方法 |
US13/670,119 US8765523B2 (en) | 2011-12-07 | 2012-11-06 | Method for manufacturing semiconductor device including Schottky electrode |
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JP2011267604A JP2013120822A (ja) | 2011-12-07 | 2011-12-07 | 半導体装置の製造方法 |
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EP (1) | EP2790225B1 (ja) |
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Cited By (4)
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JP2016115942A (ja) * | 2014-12-17 | 2016-06-23 | インフィネオン テクノロジーズ オーストリア アクチエンゲゼルシャフト | 半導体デバイス、および半導体デバイスを製作する方法 |
JP2016207881A (ja) * | 2015-04-24 | 2016-12-08 | 富士電機株式会社 | 炭化ケイ素半導体装置の製造方法 |
JP2018085379A (ja) * | 2016-11-21 | 2018-05-31 | トヨタ自動車株式会社 | 半導体装置の製造方法 |
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JP6202944B2 (ja) | 2013-08-28 | 2017-09-27 | 三菱電機株式会社 | 炭化珪素半導体装置およびその製造方法 |
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EP2790225B1 (en) | 2019-01-23 |
WO2013084620A1 (ja) | 2013-06-13 |
CN103918081A (zh) | 2014-07-09 |
US8765523B2 (en) | 2014-07-01 |
EP2790225A1 (en) | 2014-10-15 |
US20130149850A1 (en) | 2013-06-13 |
EP2790225A4 (en) | 2015-07-15 |
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