JP7069584B2 - 基板生産物の製造方法 - Google Patents
基板生産物の製造方法 Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims description 29
- 239000000758 substrate Substances 0.000 claims description 122
- 239000004065 semiconductor Substances 0.000 claims description 111
- 150000004767 nitrides Chemical class 0.000 claims description 108
- 238000000034 method Methods 0.000 claims description 26
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 6
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 5
- 238000005530 etching Methods 0.000 claims description 5
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 3
- 229910052793 cadmium Inorganic materials 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 description 49
- 239000000047 product Substances 0.000 description 27
- 229910002704 AlGaN Inorganic materials 0.000 description 15
- 238000010586 diagram Methods 0.000 description 7
- 230000006911 nucleation Effects 0.000 description 7
- 238000010899 nucleation Methods 0.000 description 7
- XCZXGTMEAKBVPV-UHFFFAOYSA-N trimethylgallium Chemical compound C[Ga](C)C XCZXGTMEAKBVPV-UHFFFAOYSA-N 0.000 description 7
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 6
- 239000002994 raw material Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 125000004430 oxygen atom Chemical group O* 0.000 description 3
- 229910052594 sapphire Inorganic materials 0.000 description 3
- 239000010980 sapphire Substances 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical compound C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 229910003363 ZnMgO Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- 238000004549 pulsed laser deposition Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 230000005533 two-dimensional electron gas Effects 0.000 description 2
- 238000001039 wet etching Methods 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000001124 (E)-prop-1-ene-1,2,3-tricarboxylic acid Substances 0.000 description 1
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229940091181 aconitic acid Drugs 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- GTZCVFVGUGFEME-IWQZZHSRSA-N cis-aconitic acid Chemical compound OC(=O)C\C(C(O)=O)=C\C(O)=O GTZCVFVGUGFEME-IWQZZHSRSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 125000005842 heteroatom Chemical group 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000001451 molecular beam epitaxy Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000002815 nickel Chemical class 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 150000003608 titanium Chemical class 0.000 description 1
- GTZCVFVGUGFEME-UHFFFAOYSA-N trans-aconitic acid Natural products OC(=O)CC(C(O)=O)=CC(O)=O GTZCVFVGUGFEME-UHFFFAOYSA-N 0.000 description 1
- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
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- H01L29/66462—Unipolar field-effect transistors with an active layer made of a group 13/15 material, e.g. group 13/15 velocity modulation transistor [VMT], group 13/15 negative resistance FET [NERFET] with a heterojunction interface channel or gate, e.g. HFET, HIGFET, SISFET, HJFET, HEMT
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Description
本発明の実施形態に係る基板生産物の製造方法の具体例を、以下に図面を参照しつつ説明する。なお、本発明はこれらの例示に限定されるものではなく、特許請求の範囲によって示され、特許請求の範囲と均等の意味及び範囲内でのすべての変更が含まれることが意図される。以下の説明では、図面の説明において同一の要素には同一の符号を付し、重複する説明を省略する。
図1は、本発明の第1実施形態に係る製造方法によって製造される基板生産物1Aの断面図である。図1に示す基板生産物1Aは、窒化物半導体を表面に有する板状の部材であって、支持基板10、窒化物半導体層11、バリア層12、チャネル層13、及び絶縁膜14を備えている。基板生産物1Aは、支持基板10上に、窒化物半導体層11、バリア層12、チャネル層13、及び絶縁膜14をこの順に有している。窒化物半導体層11は、本実施形態における第1の窒化物半導体層である。バリア層12は、本実施形態における第2の窒化物半導体層である。チャネル層13は、本実施形態における第3の窒化物半導体層である。
図6は、第2実施形態に係るHEMT2Bの構成を示す断面図である。このHEMT2Bと第1実施形態のHEMT2Aとの相違点は、窒化物半導体層11よりも下部の構造である。すなわち、HEMT2Bは、第1実施形態の支持基板10に代えて、成長用基板15及び酸化物層16を備えている。成長用基板15及び酸化物層16は、第1実施形態において説明した基板生産物1Aの製造の際に用いられたものである。本実施形態のHEMT2Bは、第1実施形態における、成長用基板15及び酸化物層16を除去する工程、及び支持基板10を貼り付ける工程を省略することにより作製される。
Claims (8)
- 窒化物半導体を表面に有する基板生産物の製造方法であって、
Znを含み、成長面がO極性面である酸化物層を、c面またはa面を主面とする成長用基板の前記主面上に成長する工程と、
成長面がN極性面である第1の窒化物半導体層を前記酸化物層上に成長する工程と、
前記第1の窒化物半導体層上に、前記第1の窒化物半導体層のバンドギャップよりも大きなバンドギャップを有する第2の窒化物半導体層を成長する工程と、
前記第2の窒化物半導体層上に、前記第2の窒化物半導体層のバンドギャップよりも小さなバンドギャップを有する第3の窒化物半導体層を成長する工程と、
前記第3の窒化物半導体層の表面上に仮基板を貼り付ける工程と、
前記酸化物層を除去して前記第1の窒化物半導体層の裏面を露出させる工程と、
前記第1の窒化物半導体層の前記裏面に支持基板を貼り付ける工程と、
前記仮基板を除去する工程と、
を含む、基板生産物の製造方法。 - 前記酸化物層の厚さは200nm以上400nm以下である、請求項1に記載の基板生産物の製造方法。
- 前記酸化物層がMg及びCdの少なくとも一方を含む、請求項1または請求項2に記載の基板生産物の製造方法。
- 前記酸化物層はZnO層であり、前記第1の窒化物半導体層はGaN層である、請求項1または請求項2に記載の基板生産物の製造方法。
- 前記第1の窒化物半導体層の厚さは0.5μm以上2.0μm以下である、請求項1から請求項4のいずれか1項に記載の基板生産物の製造方法。
- 前記第3の窒化物半導体層の厚さは10nm以上50nm以下である、請求項1から請求項5のいずれか1項に記載の基板生産物の製造方法。
- 前記支持基板を貼り付ける工程では、前記支持基板としてSi基板を用い、SiO2膜を介して前記Si基板を前記第1の窒化物半導体層の前記裏面に貼り付ける、請求項1から請求項6のいずれか1項に記載の基板生産物の製造方法。
- 前記酸化物層を除去する工程では、リン酸溶液を用いたエッチングにより前記酸化物層を除去する、請求項1から請求項7のいずれか1項に記載の基板生産物の製造方法。
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JP2017141960A JP7069584B2 (ja) | 2017-07-21 | 2017-07-21 | 基板生産物の製造方法 |
US16/041,214 US10505013B2 (en) | 2017-07-21 | 2018-07-20 | Process of forming epitaxial substrate having N-polar gallium nitride |
CN201810802629.6A CN109285777B (zh) | 2017-07-21 | 2018-07-20 | 具有n-极性氮化镓的外延衬底的形成方法 |
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JP7069584B2 true JP7069584B2 (ja) | 2022-05-18 |
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JP2007043109A (ja) | 2005-06-29 | 2007-02-15 | National Institute Of Advanced Industrial & Technology | ZnOデバイス |
JP2009238803A (ja) | 2008-03-26 | 2009-10-15 | Furukawa Electric Co Ltd:The | GaN系半導体基板、その製造方法および半導体素子 |
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