JP2006128626A - 窒化物系半導体装置及びその製造方法 - Google Patents
窒化物系半導体装置及びその製造方法 Download PDFInfo
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- 150000004767 nitrides Chemical class 0.000 title claims abstract description 51
- 239000004065 semiconductor Substances 0.000 title claims abstract description 48
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 34
- 239000013078 crystal Substances 0.000 claims abstract description 62
- 239000000758 substrate Substances 0.000 claims abstract description 54
- 238000000034 method Methods 0.000 claims abstract description 30
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 19
- 239000010703 silicon Substances 0.000 claims abstract description 19
- 230000006911 nucleation Effects 0.000 claims description 32
- 238000010899 nucleation Methods 0.000 claims description 32
- 230000007547 defect Effects 0.000 claims description 13
- 230000003287 optical effect Effects 0.000 claims description 3
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 146
- 229910002601 GaN Inorganic materials 0.000 description 145
- 230000000052 comparative effect Effects 0.000 description 7
- 229910002704 AlGaN Inorganic materials 0.000 description 5
- 238000002441 X-ray diffraction Methods 0.000 description 4
- 239000010408 film Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 150000004678 hydrides Chemical class 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 238000000927 vapour-phase epitaxy Methods 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000000407 epitaxy Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 238000002248 hydride vapour-phase epitaxy Methods 0.000 description 1
- 239000000463 material 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
- 230000005693 optoelectronics Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
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- C30B25/00—Single-crystal growth by chemical reaction of reactive gases, e.g. chemical vapour-deposition growth
- C30B25/02—Epitaxial-layer growth
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Abstract
【解決手段】本発明による窒化物系半導体装置の製造方法は、基板上に高温AlN単結晶層を成長させる段階と、上記AlN単結晶層上に300 Torr以上である第1圧力において支配的な成長方向が側方向になるよう第1V/III比で第1GaN層を成長させる段階と、上記第1窒化物層上に上記第1圧力より低い第2圧力において上記第1V/III比より低い第2V/III比で第2GaN層を成長させる段階とを含む。
【選択図】図2
Description
これにより、最終的に形成された上記第2GaN層(105)にはSiとGaNとの格子不整合や熱膨張係数の差によるクラックなどがほぼ見られない。とりわけ、第2GaN層(105)の結晶欠陥密度は108cm-3以下となる。さらに、上記第2GaN層(105)は大変優れた表面粗さの平坦な表面を有する。したがって、このように形成された第2GaN層(105)を利用すると、GaN系発光ダイオードなどの窒化物系半導体光素子を高品質に製造し得るばかりでなく、シリコン基板を使用するので生産性が向上し他シリコン系素子とのモノリチック集積が可能になる。
先ず、Si(111)基板を反応チェンバーに入れた後、約1100℃の高温において上記基板上に高温AlN単結晶層を形成した。その後、約1050℃の温度と約300 Torrの圧力で約30μmol/minの流量のTMGガスと約401780 μmol/minの流量のNH3ガスとを反応チェンバーに供給して、約13390の高いV/III比でGaN核形成シード層を形成させた。
高温AlN単結晶層上にGaN層を形成する際V/III比がGaN層の成長様態に及ぼす影響を調べるため、下記のようにSi基板上に高温AlN単結晶層とGaN層を含む半導体サンプルを製造した。
102 高温AlN単結晶層
103 GaN核形成シード層
104 第1GaN層
105 第2GaN層
Claims (16)
- 基板上に高温AlN単結晶層を成長させる段階と、
上記AlN単結晶層上に300Torr以上である第1圧力において支配的な成長方向が側方向になるよう第1V/III比で第1GaN層を成長させる段階と、
上記第1GaN層上に上記第1圧力より低い第2圧力において上記第1V/III比より低い第2V/III比で第2GaN層を成長させる段階とを含む窒化物系半導体装置の製造方法。 - 上記高温AlN単結晶層の厚さは200ないし1000Åである請求項1に記載の窒化物系半導体装置の製造方法。
- 上記高温AlN単結晶層を成長させる段階は、1050ないし1200℃の温度において行われる請求項1に記載の窒化物系半導体装置の製造方法。
- 上記第1GaN層を成長させる段階及び第2GaN層を成長させる段階は、上記AlN単結晶層の成長温度とほぼ同一な温度において行われる請求項3に記載の窒化物系半導体装置の製造方法。
- 上記第1圧力は300ないし760Torrで、
上記第1GaN層を成長させる段階は、
上記AlN単結晶層上に少なくとも10000のV/III比で2次元成長のためのGaN核生成シード層を形成する段階と、上記GaN核生成シード層を利用して少なくとも6000のV/III比で第1GaN層を形成する段階を含む請求項1に記載の窒化物系半導体装置の製造方法。 - 上記GaN核生成シード層を形成するためのV/III比は10000ないし150000で、上記第1GaN層を形成するためのV/III比は6000ないし12000である請求項5に記載の窒化物系半導体装置の製造方法。
- 上記核生成シードを形成するためのV/III比は上記第1GaN層を形成するためのV/III比より高い請求項6に記載の窒化物系半導体装置の製造方法。
- 上記第2圧力は100Torr以下で、上記第2V/III比は3000以下である請求項1に記載の窒化物系半導体装置の製造方法。
- 上記第2圧力は10ないし50Torrで、上記第2V/III比は800ないし3000である請求項8に記載の窒化物系半導体装置の製造方法。
- 上記第1GaN層の結晶欠陥密度は109cm-3以下である請求項1に記載の窒化物系半導体装置の製造方法。
- 上記第2GaN層の結晶欠陥密度は108cm-3以下である請求項1に記載の窒化物系半導体装置の製造方法。
- 上記基板はシリコン基板である請求項1に記載の窒化物系半導体装置の製造方法。
- 請求項1ないし12のいずれか一項に記載の窒化物系半導体装置の製造方法を利用して製造された窒化物半導体光素子。
- 基板上に形成された高温AlN単結晶層と、
上記高温AlN単結晶層上に形成されたGaN核生成シード層と、
上記GaN核生成シード層上に支配的に側方向に成長し、結晶欠陥密度が109cm-3以下である第1GaN層と、
上記第1GaN層上に支配的に側方向に成長し、結晶欠陥密度が108cm-3以下である第2GaN層とを含む窒化物系半導体装置。 - 上記高温AlN単結晶層の厚さは200ないし1000Åである請求項14に記載の窒化物系半導体装置。
- 上記基板はシリコン基板である請求項14に記載の窒化物系半導体装置。
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JP2007096331A (ja) * | 2005-09-27 | 2007-04-12 | Philips Lumileds Lightng Co Llc | Iii−v族発光デバイスを成長させるための基板 |
JP2008053594A (ja) * | 2006-08-28 | 2008-03-06 | Sharp Corp | 窒化物半導体層の形成方法 |
JP2009239038A (ja) * | 2008-03-27 | 2009-10-15 | Stanley Electric Co Ltd | 半導体素子およびその製造方法 |
US7691651B2 (en) | 2005-06-10 | 2010-04-06 | Samsung Electro-Mechanics Co., Ltd. | Method for manufacturing nitride-based semiconductor device |
JP2010123800A (ja) * | 2008-11-20 | 2010-06-03 | Sanken Electric Co Ltd | 半導体ウェハ、半導体装置、半導体ウェハ製造方法及び半導体装置製造方法 |
JP2010232364A (ja) * | 2009-03-26 | 2010-10-14 | Tokuyama Corp | Iii族窒化物積層体、その製造方法およびiii族窒化物半導体素子 |
JP2012248723A (ja) * | 2011-05-30 | 2012-12-13 | Sharp Corp | 窒化物半導体発光素子およびその製造方法 |
JP2013187551A (ja) * | 2013-04-09 | 2013-09-19 | Toshiba Corp | 窒化物半導体層の製造方法 |
US9349590B2 (en) | 2012-03-08 | 2016-05-24 | Kabushiki Kaisha Toshiba | Method for manufacturing nitride semiconductor layer |
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KR100843474B1 (ko) | 2006-12-21 | 2008-07-03 | 삼성전기주식회사 | Ⅲ족 질화물 단결정 성장방법 및 이를 이용하여 제조된질화물 단결정 |
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JP2008053594A (ja) * | 2006-08-28 | 2008-03-06 | Sharp Corp | 窒化物半導体層の形成方法 |
JP2009239038A (ja) * | 2008-03-27 | 2009-10-15 | Stanley Electric Co Ltd | 半導体素子およびその製造方法 |
JP2010123800A (ja) * | 2008-11-20 | 2010-06-03 | Sanken Electric Co Ltd | 半導体ウェハ、半導体装置、半導体ウェハ製造方法及び半導体装置製造方法 |
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Also Published As
Publication number | Publication date |
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US20080150086A1 (en) | 2008-06-26 |
US7319064B2 (en) | 2008-01-15 |
KR20060038058A (ko) | 2006-05-03 |
KR100674829B1 (ko) | 2007-01-25 |
JP4335187B2 (ja) | 2009-09-30 |
US20060091500A1 (en) | 2006-05-04 |
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