JP2007158285A - Iii族窒化物基反射器を製造する方法 - Google Patents
Iii族窒化物基反射器を製造する方法 Download PDFInfo
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Abstract
【解決手段】基板上にバッファ層を成長させる工程と、バッファ層上にGaNとAlN反射器膜を成長させる工程と、GaN層上に一対のGaNとAlN反射器膜を成長させる工程と、一対以上の超格子層を成長させる工程を備えるIII族窒化物基分布ブラッグ反射器を製造する方法において、超格子層の各対は、GaNとAlNの2つ以上の層から構成される1組の超格子とGaN層を具備している。
【選択図】図1
Description
(1)基板上に成長するバッファ層と、
(2)バッファ層上に成長する厚いGaN層と、
(3)厚いGaN層上に成長する一対以上の1/4波長GaNとAlN反射器膜と、
(4)一対以上のAlN/GaN超格子層(1/4波長)、および1/4波長GaN層と、
を備えるIII族窒化物基分布ブラッグ反射器の製造方法。
このように、クラックのない分布ブラッグ反射器が本発明により達成される。
本方法を示す図1を参照すると、AlN/GaN超格子を挿入する分布ブラッグ反射器を、有機金属化学気相エピタキシー法により成長させる。
最初に、エピ対応のサファイヤ基板をMOCVD反応室内に置く。基板表面の不純物を5分間高温(1100℃)水素雰囲気において除去し、その後成長温度を500℃に下げて厚さ30nmのバッファ層を成長させた。次に、成長圧力が200Torrで回転速度が900rpmにおいて、厚さ3μmのGaN層をバッファ層の上に成長させた。
AlN/GaN超格子を挿入しない実際の別のサンプルを同じ成長パラメータで成長させた。その結果、図2(a)に示すような20対のAlN/GaN超格子が挿入されないDBRサンプルの表面においてクラックが観測された。その反射率スペクトルを図5中の点線で示す。
Claims (14)
- (1)基板上にバッファ層を成長させる工程、
(2)前記バッファ層上にGaN層を成長させる工程、
(3)前記GaN層上に一対以上のGaNとAlN反射器膜を成長させる工程、
(4)一対以上の超格子層を成長させる工程、
を備えるIII族窒化物基分布ブラッグ反射器を製造する方法において、超格子層の各対は、GaNとAlNの2つ以上の層から構成される1組の超格子とGaN層からなることを特徴とするIII族窒化物基分布ブラッグ反射器を製造する方法。 - 前記基板は、サファイヤ、炭化珪素(SiC)、酸化亜鉛(ZnO)、シリコン基板から選択される少なくとも1つ、またはそれらの組み合わせからなることを特徴とする請求項1に記載のIII族窒化物基分布ブラッグ反射器を製造する方法。
- 前記バッファ層は100〜1000℃の温度で成長することを特徴とする請求項1に記載のIII族窒化物基分布ブラッグ反射器を製造する方法。
- 前記GaN層は、圧力が50〜500Torrおよび回転速度が900rpmで成長することを特徴とする請求項1に記載のIII族窒化物基分布ブラッグ反射器を製造する方法。
- 前記反射器膜は、キャリヤーガスである窒素(N2)の流量が10〜6000sccm、水素(H2)の流量が0〜200sccm、圧力が1〜300Torr、および温度が300〜1500℃において成長することを特徴とする請求項1に記載のIII族窒化物基分布ブラッグ反射器を製造する方法。
- 前記超格子層は、NH3フラックスが100〜1500sccm、TMGaフラックスが1〜20sccm、およびTMAlフラックスが10〜200sccmの条件で成長することを特徴とする請求項1に記載のIII族窒化物基分布ブラッグ反射器を製造する方法。
- 前記GaN層は、有機金属化学気相エピタキシー法、水素化物気相エピタキシー法、分子線エピタキシー法、またはホットウォールエピタキシー法により成長することを特徴とする請求項1に記載のIII族窒化物基分布ブラッグ反射器を製造する方法。
- 前記バッファ層の厚さは、1〜100nmの範囲内にあることを特徴とする請求項1に記載のIII族窒化物基分布ブラッグ反射器を製造する方法。
- 前記GaN層の厚さは、10〜100nmの範囲内であることを特徴とする請求項1に記載のIII族窒化物基分布ブラッグ反射器を製造する方法。
- 前記反射器膜の各層の光学的厚さは1/4(1±20%)波長であり、AlN/GaN層対の合計厚さは1/2波長であることを特徴とする請求項1に記載のIII族窒化物基分布ブラッグ反射器を製造する方法。
- バッファ層、GaN層、一対以上のGaN/AlNにより構成される反射器膜、および一対以上の超格子層をこの順に基板上に成長させ、超格子層の各対は、GaN層を挿入した2層以上のGaN/AlNにより構成される一組の超格子から成り、一組の超格子の厚さは1/4波長である請求項1〜10のいずれかに記載の方法により製造されることを特徴とする分布ブラッグ反射器。
- 一対以上の超格子層から成ることを特徴とする請求項11に記載の分布ブラッグ反射器。
- 前記超格子の両側は薄いAlN層であることを特徴とする請求項11に記載の分布ブラッグ反射器。
- GaNとAlNにより構成される一対以上の反射器膜から成ることを特徴とする請求項11に記載の分布ブラッグ反射器。
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| TW094142756A TW200723624A (en) | 2005-12-05 | 2005-12-05 | Process of producing group III nitride based reflectors |
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| JP2024523148A (ja) * | 2021-07-07 | 2024-06-28 | エイエムエス-オスラム インターナショナル ゲーエムベーハー | 面発光半導体レーザおよび面発光半導体レーザを製造する方法 |
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| US11322599B2 (en) | 2016-01-15 | 2022-05-03 | Transphorm Technology, Inc. | Enhancement mode III-nitride devices having an Al1-xSixO gate insulator |
| US10224401B2 (en) | 2016-05-31 | 2019-03-05 | Transphorm Inc. | III-nitride devices including a graded depleting layer |
| CN108428763B (zh) * | 2018-04-18 | 2024-06-04 | 厦门大学 | 一种应力调控紫外多波长msm光电探测器及其制备方法 |
| CN113922208A (zh) * | 2021-08-20 | 2022-01-11 | 华灿光电(浙江)有限公司 | GaN基蓝紫光垂直腔面发射激光器芯片及其制作方法 |
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| JP2003063896A (ja) * | 2001-08-23 | 2003-03-05 | Ricoh Co Ltd | 半導体膜成長方法及び窒素原料精製装置及び半導体膜成長装置及び半導体レーザ及び光通信システム |
| JP2005056922A (ja) * | 2003-08-06 | 2005-03-03 | Rohm Co Ltd | 半導体発光素子 |
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| US6389051B1 (en) * | 1999-04-09 | 2002-05-14 | Xerox Corporation | Structure and method for asymmetric waveguide nitride laser diode |
| US6822272B2 (en) * | 2001-07-09 | 2004-11-23 | Nichia Corporation | Multilayered reflective membrane and gallium nitride-based light emitting element |
| US6967355B2 (en) * | 2003-10-22 | 2005-11-22 | University Of Florida Research Foundation, Inc. | Group III-nitride on Si using epitaxial BP buffer layer |
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| JP2003063896A (ja) * | 2001-08-23 | 2003-03-05 | Ricoh Co Ltd | 半導体膜成長方法及び窒素原料精製装置及び半導体膜成長装置及び半導体レーザ及び光通信システム |
| JP2005056922A (ja) * | 2003-08-06 | 2005-03-03 | Rohm Co Ltd | 半導体発光素子 |
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| JP2024523148A (ja) * | 2021-07-07 | 2024-06-28 | エイエムエス-オスラム インターナショナル ゲーエムベーハー | 面発光半導体レーザおよび面発光半導体レーザを製造する方法 |
| JP7598492B2 (ja) | 2021-07-07 | 2024-12-11 | エイエムエス-オスラム インターナショナル ゲーエムベーハー | 面発光半導体レーザおよび面発光半導体レーザを製造する方法 |
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| JP4511473B2 (ja) | 2010-07-28 |
| US20070128743A1 (en) | 2007-06-07 |
| TWI299929B (ja) | 2008-08-11 |
| TW200723624A (en) | 2007-06-16 |
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