JP4380294B2 - Iii−v族窒化物系半導体基板 - Google Patents
Iii−v族窒化物系半導体基板 Download PDFInfo
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- 239000000758 substrate Substances 0.000 title claims description 260
- 150000004767 nitrides Chemical class 0.000 title claims description 57
- 239000004065 semiconductor Substances 0.000 title claims description 42
- 239000013078 crystal Substances 0.000 claims description 111
- 238000009826 distribution Methods 0.000 claims description 9
- 125000005842 heteroatom Chemical group 0.000 claims 1
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 134
- 229910002601 GaN Inorganic materials 0.000 description 115
- 238000000034 method Methods 0.000 description 36
- 229910052594 sapphire Inorganic materials 0.000 description 23
- 239000010980 sapphire Substances 0.000 description 23
- 238000004519 manufacturing process Methods 0.000 description 12
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 11
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 10
- 239000010408 film Substances 0.000 description 8
- 239000002994 raw material Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000005259 measurement Methods 0.000 description 7
- 230000007547 defect Effects 0.000 description 6
- 238000002248 hydride vapour-phase epitaxy Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 230000003746 surface roughness Effects 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000002441 X-ray diffraction Methods 0.000 description 4
- 239000012159 carrier gas Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 229910002704 AlGaN Inorganic materials 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000000927 vapour-phase epitaxy Methods 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000006061 abrasive grain Substances 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- XOYLJNJLGBYDTH-UHFFFAOYSA-M chlorogallium Chemical compound [Ga]Cl XOYLJNJLGBYDTH-UHFFFAOYSA-M 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000407 epitaxy Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000004678 hydrides Chemical class 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000005092 sublimation method Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 238000001947 vapour-phase growth Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Description
上記の研磨加工を施した10枚のGaN自立基板に対して、面内でC軸の傾きを測定した。測定は、実施例2で述べた方法と同じやり方である。測定は、GaN自立基板の中央を基点にOFに平行な方向及び垂直な方向で7mm間隔に、合計25点を測定し、25点で測定されたC軸の傾きのベクトル平均を求め、その平均角度をθ(deg)、θから最も大きくずれていた点での傾きの測定値とθとの差をα(deg)とした。10枚のGaN自立基板のC軸は、すべてサファイア基板のオフ方向を反映して、0.3〜1.1(deg)傾いていた。また、αの値は、10枚のGaN自立基板の中の最大のもので、0.75(deg)であった。θ>αの条件は、各GaN自立基板10枚とも全て満たしていた。
2,3,4 矢印
Claims (11)
- III−V族窒化物系単結晶からなり、平坦な表面を有するIII−V族窒化物系半導体基板であって、基板面内の任意の点において基板表面に最も近い低指数面が、基板表面に対して傾いており、且つその傾き角度が基板面内でばらつきを有する基板において、基板面内の任意の複数点で測定した基板表面に最も近い低指数面と基板表面がなす角度の平均値θ(deg)と、そのθに対する前記測定した角度のばらつきの範囲±α(deg)が、θ>αの関係を満たしており、且つ、θ<10(deg)、α<1(deg)であること特徴とするIII−V族窒化物系半導体基板。
- III−V族窒化物系単結晶からなり、平坦な表面を有するIII−V族窒化物系半導体基板であって、基板面内の任意の点において基板表面に最も近い低指数面が、基板表面に対して傾いており、且つその傾き角度が基板面内でばらつきを有する基板において、基板面内の任意の複数点で測定した基板表面に最も近い低指数面と基板表面がなす角度の平均値θ(deg)と、そのθに対する前記測定した角度のばらつきの範囲±α(deg)が、θ>αの関係を満たし、θ<10(deg)、α<1(deg)であり、且つ前記基板表面に対する前記各々の低指数面の傾きの方向が、すべてほぼ一定の方向を向いていることを特徴とするIII−V族窒化物系半導体基板。
- III−V族窒化物系単結晶からなり、平坦な表面を有するIII−V族窒化物系半導体基板であって、基板面内の任意の点において基板表面に最も近い低指数面が、基板表面に対して傾いており、且つその傾き角度が基板面内でばらつきを有する基板において、基板面内の任意の複数点で測定した基板表面に最も近い低指数面と基板表面がなす角度の平均値θ(deg)と、そのθに対する前記測定した角度のばらつきの範囲±α(deg)が、θ>αの関係を満たし、θ<10(deg)、α<1(deg)であり、且つ前記基板面内の任意の複数点における前記基板表面に最も近い低指数面の法線ベクトルを基板表面に投影したベクトルの方向の分布の範囲が、180度未満であることを特徴とするIII−V族窒化物系半導体基板。
- 異種基板上に前記III−V族窒化物系半導体結晶がヘテロエピタキシャル成長されたものであることを特徴とする請求項1〜3いずれかに記載のIII−V族窒化物系半導体基板。
- III−V族窒化物系単結晶だけからなる自立した基板であることを特徴とする請求項1〜3いずれかに記載のIII−V族窒化物系半導体基板。
- 前記III−V族窒化物系単結晶は、六方晶系であることを特徴とする請求項1〜5いずれかに記載のIII−V族窒化物系半導体基板。
- 前記III−V族窒化物系単結晶は、六方晶系であり、且つ基板表面に最も近い低指数面がC面であることを特徴とする請求項1〜5いずれかに記載のIII−V族窒化物系半導体基板。
- 前記III−V族窒化物系単結晶は、六方晶系であり、且つ、基板表面に最も近い低指数面がA面又はM面又はR面のいずれかであることを特徴とする請求項1〜5いずれかに記載のIII−V族窒化物系半導体基板。
- 前記基板表面は、鏡面研磨加工が施されていることを特徴とする請求項1〜8いずれかに記載のIII−V族窒化物系半導体基板。
- 前記基板面内の任意の点における前記基板表面に最も近い低指数面がC面であり、且つ前記基板表面に対する当該低指数面の傾きの方向は、A軸方向であることを特徴とする請求項1〜7、9いずれかに記載のIII−V族窒化物系半導体基板。
- 前記基板面内の任意の点における前記基板表面に最も近い低指数面がC面であり、且つ前記基板表面に対する当該低指数面の傾きの方向は、M軸方向であることを特徴とする請求項1〜7、9いずれかに記載のIII−V族窒化物系半導体基板。
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JP2003368828A JP4380294B2 (ja) | 2003-10-29 | 2003-10-29 | Iii−v族窒化物系半導体基板 |
US10/752,092 US7057204B2 (en) | 2003-10-29 | 2004-01-07 | III-V group nitride system semiconductor substrate |
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JP4380294B2 true JP4380294B2 (ja) | 2009-12-09 |
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Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006306722A (ja) * | 2004-03-17 | 2006-11-09 | Sumitomo Electric Ind Ltd | GaN単結晶基板の製造方法及びGaN単結晶基板 |
JP2010168277A (ja) * | 2004-03-17 | 2010-08-05 | Sumitomo Electric Ind Ltd | 半導体発光装置 |
JP4581490B2 (ja) * | 2004-05-31 | 2010-11-17 | 日立電線株式会社 | Iii−v族窒化物系半導体自立基板の製造方法、及びiii−v族窒化物系半導体の製造方法 |
JP2006108435A (ja) * | 2004-10-06 | 2006-04-20 | Sumitomo Electric Ind Ltd | 窒化物半導体ウエハ |
JP4849296B2 (ja) * | 2005-04-11 | 2012-01-11 | 日立電線株式会社 | GaN基板 |
JP4529846B2 (ja) * | 2005-09-06 | 2010-08-25 | 日立電線株式会社 | Iii−v族窒化物系半導体基板及びその製造方法 |
KR100707166B1 (ko) * | 2005-10-12 | 2007-04-13 | 삼성코닝 주식회사 | GaN 기판의 제조방법 |
KR100695118B1 (ko) * | 2005-12-27 | 2007-03-14 | 삼성코닝 주식회사 | 다중-프리스탠딩 GaN 웨이퍼의 제조방법 |
US9790617B2 (en) | 2006-04-07 | 2017-10-17 | Sixpoint Materials, Inc. | Group III nitride bulk crystals and their fabrication method |
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JPH088217B2 (ja) | 1991-01-31 | 1996-01-29 | 日亜化学工業株式会社 | 窒化ガリウム系化合物半導体の結晶成長方法 |
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