JP2007142437A - 半導体素子およびその製造方法 - Google Patents
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Abstract
【解決手段】R面サファイア基板と、前記R面サファイア基板上に窒素を含むガス雰囲気下および900〜1100℃の温度で、10〜2000nmの厚さにエピタキシャル成長されるAlxGa(1−x)N(ただし0≦x<1)バッファ層と、前記AlxGa(1−x)N(ただし0≦x<1)バッファ層上に形成される第1A面GaN層と、を含むことを特徴とする半導体素子およびその製造方法である。
【選択図】図4
Description
S.Wu et al.,Jpn.J.Appl.Phys.,Vol.42,(2003)L818〜L820
また、本発明は、R面サファイア基板上に窒素を含むガス雰囲気下および900〜1100℃の温度で10〜2000nm(100〜20000Å)の厚さにAlxGa(1−x)N(ただし0≦x<1)をエピタキシャル成長させてAlxGa(1−x)N(ただし0≦x<1)バッファ層を形成する工程と、前記AlxGa(1−x)N(ただし0≦x<1)バッファ層上に第1A面GaN層を形成する工程と、を含むことを特徴とする半導体素子の製造方法を提供する。
6 A面GaN層、
14 AlxGa(1−x)N(ただし0≦x<1)バッファ層、
16、20 第1A面GaN層、
22 活性層、
24 第2A面GaN層、
30 n電極、
40 p電極。
Claims (27)
- R面サファイア基板と、
前記R面サファイア基板上に窒素を含むガス雰囲気下および900〜1100℃の温度で、10〜2000nmの厚さにエピタキシャル成長されるAlxGa(1−x)N(ただし0≦x<1)バッファ層と、
前記AlxGa(1−x)N(ただし0≦x<1)バッファ層上に形成される第1A面GaN層と、
を含むことを特徴とする、半導体素子。 - 前記第1A面GaN層は、鏡面状の表面モルフォロジーを有することを特徴とする、請求項1に記載の半導体素子。
- 前記窒素を含むガス雰囲気は、窒素雰囲気または窒素と水素との混合ガス雰囲気であることを特徴とする、請求項1または2に記載の半導体素子。
- 前記混合ガス雰囲気中の窒素の体積含有率が、1〜99.99%であることを特徴とする、請求項3に記載の半導体素子。
- 前記第1A面GaN層上に、第2A面GaN層がさらに成長されることを特徴とする、請求項1〜4のいずれか1項に記載の半導体素子。
- 前記第1A面GaN層は、n型ドーパントを含むことを特徴とする、請求項1〜5のいずれか1項に記載の半導体素子。
- 前記第1A面GaN層は、n型半導体から形成されることを特徴とする、請求項6に記載の半導体素子。
- 前記第2A面GaN層は、p型ドーパントを含むことを特徴とする、請求項5〜7のいずれか1項に記載の半導体素子。
- 前記第2A面GaN層は、p型半導体から形成されることを特徴とする、請求項8に記載の半導体素子。
- 前記第1A面GaN層は、900〜1200℃の温度で成長されることを特徴とする、請求項1〜9のいずれか1項に記載の半導体素子。
- 前記第2A面GaN層は、900〜1200℃の温度で成長されることを特徴とする、請求項5〜10のいずれか1項に記載の半導体素子。
- 前記AlxGa(1−x)N(ただし0≦x<1)バッファ層は、0.1333〜26.66kPaの圧力下で成長されることを特徴とする、請求項1〜11のいずれか1項に記載の半導体素子。
- R面サファイア基板と、
前記R面サファイア基板上に窒素を含むガス雰囲気下および900〜1100℃の温度で、10〜2000nmの厚さにエピタキシャル成長されるAlxGa(1−x)N(ただし0≦x<1)バッファ層と、
前記AlxGa(1−x)N(ただし0≦x<1)バッファ層上に形成されn型ドーパントを含む第1A面GaN層と、
前記第1A面GaN層上に形成される活性層と、
前記活性層上に形成されp型ドーパントを含む第2A面GaN層と、
を含むことを特徴とする、半導体素子。 - R面サファイア基板上に、窒素を含むガス雰囲気下および900℃〜1100℃の温度で10〜2000nmの厚さにAlxGa(1−x)N(ただし0≦x<1)をエピタキシャル成長させてAlxGa(1−x)N(ただし0≦x<1)バッファ層を形成する工程と、
前記AlxGa(1−x)N(ただし0≦x<1)バッファ層上に第1A面GaN層を形成する工程と、
を含むことを特徴とする半導体素子の製造方法。 - 前記第1A面GaN層は、鏡面状の表面モルフォロジーを有するように形成されることを特徴とする、請求項14に記載の半導体素子の製造方法。
- 前記窒素を含むガス雰囲気は、窒素雰囲気または窒素と水素との混合ガス雰囲気であることを特徴とする、請求項14または15に記載の半導体素子の製造方法。
- 前記混合ガス雰囲気中の窒素の体積含有率が、1〜99.99%であることを特徴とする、請求項16に記載の半導体素子の製造方法。
- 前記第1A面GaN層上に第2A面GaN層を形成する工程をさらに含むことを特徴とする、請求項14〜17のいずれか1項に記載の半導体素子の製造方法。
- 前記第1A面GaN層は、n型ドーパントを含むように形成されることを特徴とする、請求項14〜18のいずれか1項に記載の半導体素子の製造方法。
- 前記第1A面GaN層は、n型半導体から形成されることを特徴とする、請求項19に記載の半導体素子の製造方法。
- 前記第2A面GaN層は、p型ドーパントを含むように形成されることを特徴とする、請求項18〜20のいずれか1項に記載の半導体素子の製造方法。
- 前記第2A面GaN層は、p型半導体から形成されることを特徴とする、請求項21に記載の半導体素子の製造方法。
- 前記第1A面GaN層は、900〜1200℃の温度で形成されることを特徴とする、請求項14〜22のいずれか1項に記載の半導体素子の製造方法。
- 前記第2A面GaN層は、900〜1200℃の温度で形成されることを特徴とする、請求項18〜23のいずれか1項に記載の半導体素子の製造方法。
- 前記AlxGa(1−x)N(ただし0≦x<1)バッファ層は、0.1333〜26.66kPaの圧力下で形成されることを特徴とする、請求項14〜24のいずれか1項に記載の半導体素子の製造方法。
- 前記AlxGa(1−x)N(ただし0≦x<1)バッファ層の厚さを制御することによって前記第1A面GaN層の結晶性が制御されることを特徴とする、請求項14〜25のいずれか1項に記載の半導体素子の製造方法。
- R面サファイア基板上に窒素を含むガス雰囲気下および900〜1100℃の温度で、10〜2000nmの厚さにAlxGa(1−x)N(ただし0≦x<1)をエピタキシャル成長させて、AlxGa(1−x)N(ただし0≦x<1)バッファ層を形成する工程と、
前記AlxGa(1−x)N(ただし0≦x<1)バッファ層上にn型ドーパントを含む第1A面GaN層を形成する工程と、
前記第1A面GaN層上に活性層を形成する工程と、
前記活性層上にp型ドーパントを含む第2A面GaN層を形成する工程と、
を含むことを特徴とする、半導体素子の製造方法。
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| US9000466B1 (en) | 2010-08-23 | 2015-04-07 | Soraa, Inc. | Methods and devices for light extraction from a group III-nitride volumetric LED using surface and sidewall roughening |
| US8207554B2 (en) | 2009-09-11 | 2012-06-26 | Soraa, Inc. | System and method for LED packaging |
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| JPH11191638A (ja) * | 1997-10-01 | 1999-07-13 | Nichia Chem Ind Ltd | 窒化物半導体素子 |
| JP2000068609A (ja) * | 1998-08-24 | 2000-03-03 | Ricoh Co Ltd | 半導体基板および半導体レーザ |
| JP2004111514A (ja) * | 2002-09-17 | 2004-04-08 | Sanyo Electric Co Ltd | 窒化物系半導体発光素子およびその製造方法 |
| US20050040385A1 (en) * | 2002-04-15 | 2005-02-24 | Craven Michael D. | Non-polar (Al,B,In,Ga)N quantum well and heterostructure materials and devices |
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| US6645885B2 (en) * | 2001-09-27 | 2003-11-11 | The National University Of Singapore | Forming indium nitride (InN) and indium gallium nitride (InGaN) quantum dots grown by metal-organic-vapor-phase-epitaxy (MOCVD) |
| JP4063548B2 (ja) * | 2002-02-08 | 2008-03-19 | 日本碍子株式会社 | 半導体発光素子 |
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2006
- 2006-11-13 EP EP06123926A patent/EP1788619A3/en not_active Withdrawn
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- 2006-11-20 JP JP2006313553A patent/JP2007142437A/ja active Pending
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|---|---|---|---|---|
| JPH11191638A (ja) * | 1997-10-01 | 1999-07-13 | Nichia Chem Ind Ltd | 窒化物半導体素子 |
| JP2000068609A (ja) * | 1998-08-24 | 2000-03-03 | Ricoh Co Ltd | 半導体基板および半導体レーザ |
| US20050040385A1 (en) * | 2002-04-15 | 2005-02-24 | Craven Michael D. | Non-polar (Al,B,In,Ga)N quantum well and heterostructure materials and devices |
| JP2004111514A (ja) * | 2002-09-17 | 2004-04-08 | Sanyo Electric Co Ltd | 窒化物系半導体発光素子およびその製造方法 |
| JP2007103774A (ja) * | 2005-10-06 | 2007-04-19 | Showa Denko Kk | Iii族窒化物半導体積層構造体およびその製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1788619A2 (en) | 2007-05-23 |
| EP1788619A3 (en) | 2009-09-09 |
| US20070114563A1 (en) | 2007-05-24 |
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