JPWO2010101016A1 - 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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- 239000004065 semiconductor Substances 0.000 title claims abstract description 47
- 229910010271 silicon carbide Inorganic materials 0.000 title claims description 107
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims description 104
- 238000004519 manufacturing process Methods 0.000 title claims description 54
- 238000000034 method Methods 0.000 title claims description 35
- 239000000758 substrate Substances 0.000 claims abstract description 62
- 230000008569 process Effects 0.000 claims description 7
- 230000007547 defect Effects 0.000 abstract description 42
- 239000013078 crystal Substances 0.000 abstract description 36
- 230000005012 migration Effects 0.000 abstract description 19
- 238000013508 migration Methods 0.000 abstract description 19
- 239000007789 gas Substances 0.000 description 16
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 10
- 239000012535 impurity Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 8
- 230000007423 decrease Effects 0.000 description 7
- 239000001294 propane Substances 0.000 description 5
- 235000012431 wafers Nutrition 0.000 description 5
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 238000002109 crystal growth method Methods 0.000 description 2
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- 238000000206 photolithography Methods 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- SLLGVCUQYRMELA-UHFFFAOYSA-N chlorosilicon Chemical compound Cl[Si] SLLGVCUQYRMELA-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- BUMGIEFFCMBQDG-UHFFFAOYSA-N dichlorosilicon Chemical compound Cl[Si]Cl BUMGIEFFCMBQDG-UHFFFAOYSA-N 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- PZPGRFITIJYNEJ-UHFFFAOYSA-N disilane Chemical compound [SiH3][SiH3] PZPGRFITIJYNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
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- 229910052698 phosphorus Inorganic materials 0.000 description 1
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- ZDHXKXAHOVTTAH-UHFFFAOYSA-N trichlorosilane Chemical compound Cl[SiH](Cl)Cl ZDHXKXAHOVTTAH-UHFFFAOYSA-N 0.000 description 1
- 239000005052 trichlorosilane Substances 0.000 description 1
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Abstract
Description
本実施の形態に係るSiC半導体装置の製造方法の特徴点は、SiC半導体素子(縦型MOSFET又はIGBT等)のドリフト層を作る際に、第1層目のエピタキシャル膜(第1ドリフト層)を成長させて第1ドリフト層を形成し、その上に第1層目のエピタキシャル膜の成長温度よりも低い温度で第2層目のエピタキシャル膜(第2ドリフト層)を成長させることによって当該ドリフト層を形成する点にある。
図15は、本実施の形態に係るSiCショットキダイオード(以下「SIC−SBD」と言う。)の構造を示す縦断面図である。以下に、図15のSiC−SBDの製造方法について記載する。
図16は、本実施の形態に係る製造方法により作成された、オフ角が5度以下のSiC基板を有するSiC−MOSFETの構造を示す縦断面図である。図16のSiC−MOSFETが図1のSiC−MOSFETと構造上相違する点は、ドリフト層が1層のエピタキシャル層3より成り、p型のベース領域4の表面の内でソース領域5が形成されていない表面部分上と、一対のベース領域4の対向する当該表面部分同士で挟まれたドリフト層3の表面上とに、2層のn型の第1及び第2エピタキシャル層10,11が配設されている点である。図16に於いては、第1及び第2エピタキシャル層10,11がSiC−MOSFETのチャネル部を成す。
図17は、本実施の形態に係る製造方法により作成された、オフ角が5度以下のSiC基板を有するSiC−MOSFETの構造を示す縦断面図である。図17に示されるSiC−MOSFETでは、ドリフト層3上にドリフト層3とは異なるキャリア濃度で2層のn型の第1及び第2エピタキシャル層10,11を成長させ、これらn型の第1及び第2エピタキシャル層10,11を本SiC−MOSFETのチャネル部として構成している。本実施の形態の主目的は、ドリフト層3の表面上の第1及び第2エピタキシャル層10,11内のバンチングステップの高さを抑制する、さらにはエピタキシャル層同士の界面に起因する欠陥格子の密度を低減化するための製造方法を提案することにある。
図17は、本実施の形態に係る製造方法により作成された、オフ角が5度以下のSiC基板を有するSiC−MOSFETの構造を示す縦断面図である。図17に示されるSiC−MOSFETでは、ドリフト層3上にドリフト層3とは異なるキャリア濃度で2層のn型の第1及び第2エピタキシャル層12,13を成長させ、これらn型の第1及び第2エピタキシャル層12,13を本SiC−MOSFETのチャネル部として構成している。本実施の形態の主目的は、ドリフト層3の表面上の第1及び第2エピタキシャル層12,13内のバンチングステップの高さを抑制する、さらにはエピタキシャル層同士の界面に起因する欠陥格子の密度を低減化するための製造方法を提案することにある。
Claims (9)
- オフ角を有する炭化珪素半導体基板(1)の主面上に、第1エピタキシャル層(2,10,12)を成長させる工程と、
前記第1エピタキシャル層の上面上であって且つ前記第1エピタキシャル層の前記上面と接して、前記第1エピタキシャル層の成長温度よりも低い成長温度で第2エピタキシャル層(2,11,13)を成長させる工程とを、
備えることを特徴とする、
炭化珪素半導体装置の製造方法。 - 請求項1記載の炭化珪素半導体装置の製造方法であって、
前記炭化珪素半導体基板の前記オフ角は5度以下である、
炭化珪素半導体装置の製造方法。 - 請求項1記載の炭化珪素半導体装置の製造方法であって、
前記第1エピタキシャル層は、前記炭化珪素半導体基板の前記主面と接してエピタキシャル成長されることを特徴とする、
炭化珪素半導体装置の製造方法。 - 請求項3記載の炭化珪素半導体装置の製造方法であって、
前記第1及び第2エピタキシャル層は、当該炭化珪素半導体装置のドリフト層(2,3)として用いられる、
炭化珪素半導体装置の製造方法。 - 請求項3記載の炭化珪素半導体装置の製造方法であって、
前記第2エピタキシャル層上にショットキー接合する電極(16)を形成する工程をさらに備える、
炭化珪素半導体装置の製造方法。 - 請求項1記載の炭化珪素半導体装置の製造方法であって、
前記第1エピタキシャル層(10)は、前記炭化珪素半導体基板の前記主面と接して配設されたエピタキシャル層であるドリフト層の上面と接してエピタキシャル成長されることを特徴とする、
炭化珪素半導体装置の製造方法。 - 請求項6記載の炭化珪素半導体装置の製造方法であって、
前記第1及び第2エピタキシャル層は、当該炭化珪素半導体装置のチャネル部(10,11,12,13)として用いられる、
炭化珪素半導体装置の製造方法。 - 請求項1記載の炭化珪素半導体装置の製造方法であって、
前記第1エピタキシャル層の成長温度は、1570℃以上1620℃以下である、
炭化珪素半導体装置の製造方法。 - 請求項1記載の炭化珪素半導体装置の製造方法であって、
前記第2エピタキシャル層の成長温度は、1470℃以上1520℃以下である、
炭化珪素半導体装置の製造方法。
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---|---|---|---|---|
JP2012064873A (ja) * | 2010-09-17 | 2012-03-29 | Rohm Co Ltd | 半導体装置およびその製造方法 |
JP5865777B2 (ja) * | 2012-05-16 | 2016-02-17 | 三菱電機株式会社 | 炭化珪素エピタキシャルウェハの製造方法 |
JP5814881B2 (ja) * | 2012-07-31 | 2015-11-17 | 株式会社東芝 | トランジスタ及びその製造方法 |
KR20140055338A (ko) * | 2012-10-31 | 2014-05-09 | 엘지이노텍 주식회사 | 에피택셜 웨이퍼 및 그 제조 방법 |
JP6036200B2 (ja) * | 2012-11-13 | 2016-11-30 | 富士電機株式会社 | 炭化珪素半導体装置の製造方法 |
KR102098209B1 (ko) * | 2013-02-05 | 2020-04-08 | 엘지이노텍 주식회사 | 에피택셜 웨이퍼 및 그 제조 방법 |
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WO2014084550A1 (ko) * | 2012-11-30 | 2014-06-05 | 엘지이노텍 주식회사 | 에피택셜 웨이퍼, 이를 이용한 스위치 소자 및 발광 소자 |
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JP2014154666A (ja) * | 2013-02-07 | 2014-08-25 | Sumitomo Electric Ind Ltd | 炭化珪素半導体基板の製造方法および炭化珪素半導体装置の製造方法 |
WO2014125550A1 (ja) * | 2013-02-13 | 2014-08-21 | 三菱電機株式会社 | SiCエピタキシャルウエハの製造方法 |
JP6150075B2 (ja) * | 2014-05-01 | 2017-06-21 | 信越半導体株式会社 | エピタキシャルウェーハの製造方法 |
WO2015170500A1 (ja) * | 2014-05-08 | 2015-11-12 | 三菱電機株式会社 | SiCエピタキシャルウエハおよび炭化珪素半導体装置の製造方法 |
CN106796886B (zh) * | 2014-08-29 | 2020-05-01 | 住友电气工业株式会社 | 碳化硅半导体器件和用于制造碳化硅半导体器件的方法 |
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CN105006425A (zh) * | 2015-06-08 | 2015-10-28 | 国网智能电网研究院 | 一种无台阶聚集低偏角碳化硅外延生长方法 |
CN105006423B (zh) * | 2015-06-08 | 2018-12-18 | 国网智能电网研究院 | 一种p型低偏角碳化硅外延片的制备方法 |
CN105826186B (zh) * | 2015-11-12 | 2018-07-10 | 中国电子科技集团公司第五十五研究所 | 高表面质量碳化硅外延层的生长方法 |
JP6672962B2 (ja) * | 2016-03-31 | 2020-03-25 | 住友電気工業株式会社 | 炭化珪素半導体基板および半導体装置の製造方法 |
JP6796407B2 (ja) * | 2016-06-27 | 2020-12-09 | 昭和電工株式会社 | SiCエピタキシャルウェハの製造方法 |
JP6939959B2 (ja) * | 2019-04-03 | 2021-09-22 | 住友電気工業株式会社 | 半導体装置 |
JP2022020995A (ja) * | 2020-07-21 | 2022-02-02 | 三菱電機株式会社 | 炭化珪素エピタキシャルウエハの製造方法 |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5248385A (en) * | 1991-06-12 | 1993-09-28 | The United States Of America, As Represented By The Administrator, National Aeronautics And Space Administration | Process for the homoepitaxial growth of single-crystal silicon carbide films on silicon carbide wafers |
JP3047666B2 (ja) * | 1993-03-16 | 2000-05-29 | 富士電機株式会社 | シリコンオキサイド半導体膜の成膜方法 |
JPH10256666A (ja) | 1997-03-13 | 1998-09-25 | Hitachi Ltd | 窒化物系化合物半導体の結晶成長方法及び半導体発光素子 |
WO2001018872A1 (fr) * | 1999-09-07 | 2001-03-15 | Sixon Inc. | TRANCHE DE SiC, DISPOSITIF A SEMI-CONDUCTEUR DE SiC, ET PROCEDE DE PRODUCTION D'UNE TRANCHE DE SiC |
JP2002270516A (ja) * | 2001-03-07 | 2002-09-20 | Nec Corp | Iii族窒化物半導体の成長方法、iii族窒化物半導体膜およびそれを用いた半導体素子 |
US7622402B2 (en) | 2002-03-29 | 2009-11-24 | Tokyo Electron Limited | Method for forming underlying insulation film |
CN100405545C (zh) * | 2003-06-06 | 2008-07-23 | 三垦电气株式会社 | 氮化物类半导体元件及其制造方法 |
JP4449357B2 (ja) | 2003-07-08 | 2010-04-14 | 日立電線株式会社 | 電界効果トランジスタ用エピタキシャルウェハの製造方法 |
US7109521B2 (en) * | 2004-03-18 | 2006-09-19 | Cree, Inc. | Silicon carbide semiconductor structures including multiple epitaxial layers having sidewalls |
JP2006120897A (ja) | 2004-10-22 | 2006-05-11 | Matsushita Electric Ind Co Ltd | 炭化珪素素子及びその製造方法 |
US7391058B2 (en) * | 2005-06-27 | 2008-06-24 | General Electric Company | Semiconductor devices and methods of making same |
JPWO2008056698A1 (ja) * | 2006-11-10 | 2010-02-25 | 住友電気工業株式会社 | 炭化珪素半導体装置およびその製造方法 |
WO2008062729A1 (fr) * | 2006-11-21 | 2008-05-29 | Sumitomo Electric Industries, Ltd. | Dispositif semiconducteur en carbure de silicium et son procédé de fabrication |
JP5274030B2 (ja) | 2007-03-07 | 2013-08-28 | リコー光学株式会社 | 投射光学系およびプロジェクタ装置および画像読取装置 |
JP2008222509A (ja) * | 2007-03-14 | 2008-09-25 | Matsushita Electric Ind Co Ltd | SiCエピタキシャル膜付き単結晶基板の製造方法 |
WO2009013914A1 (ja) | 2007-07-26 | 2009-01-29 | Ecotron Co., Ltd. | SiCエピタキシャル基板およびその製造方法 |
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