JP6654069B2 - 半導体発光素子及びその製造方法 - Google Patents
半導体発光素子及びその製造方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims description 120
- 238000004519 manufacturing process Methods 0.000 title description 14
- 239000000758 substrate Substances 0.000 claims description 47
- 238000000034 method Methods 0.000 claims description 15
- 239000013078 crystal Substances 0.000 description 12
- 102220171488 rs760746448 Human genes 0.000 description 12
- 102200012170 rs10084168 Human genes 0.000 description 10
- 239000007789 gas Substances 0.000 description 8
- 239000010408 film Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- RGGPNXQUMRMPRA-UHFFFAOYSA-N triethylgallium Chemical compound CC[Ga](CC)CC RGGPNXQUMRMPRA-UHFFFAOYSA-N 0.000 description 3
- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical compound C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 0.000 description 3
- IBEFSUTVZWZJEL-UHFFFAOYSA-N trimethylindium Chemical compound C[In](C)C IBEFSUTVZWZJEL-UHFFFAOYSA-N 0.000 description 3
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- XCZXGTMEAKBVPV-UHFFFAOYSA-N trimethylgallium Chemical compound C[Ga](C)C XCZXGTMEAKBVPV-UHFFFAOYSA-N 0.000 description 2
- 229910002704 AlGaN Inorganic materials 0.000 description 1
- 238000000441 X-ray spectroscopy Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000002149 energy-dispersive X-ray emission spectroscopy Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000001579 optical reflectometry Methods 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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Description
まず、半極性面11Sを主面として有する半導体基板11を準備する(工程S11)。本実施例においては、半極性面11Sとして、(20−2−1)面を主面に有するGaN基板11を準備した。
11 基板
11S 半極性面
13 第1の反射鏡(分布ブラッグ反射鏡)
L1 低屈折率層(InAlN層)
H1 高屈折率層(GaN層)
14 半導体構造層
14C 活性層
Claims (9)
- 半導体基板の半極性面上にInAlN層及びGaN層がこの順で複数回積層して成長された分布ブラッグ反射鏡と、
前記分布ブラッグ反射鏡上に形成され、活性層を含む半導体構造層と、を有し、
前記InAlN層は、前記GaN層との界面に複数の突起を有し、
前記InAlN層は、前記複数の突起の各々の頂部に形成され、他の領域よりもIn組成の低い低In領域を有することを特徴とする半導体発光素子。 - 前記他の領域は前記GaN層と格子整合する組成を有し、
前記低In領域は前記他の領域よりも10%以上低いIn組成を有することを特徴とする請求項1に記載の半導体発光素子。 - 前記突起の各々における前記低In領域は、前記活性層からの放出光に対して不感の平均サイズ及び平均高さを有することを特徴とする請求項1又は2に記載の半導体発光素子。
- 前記突起の各々における前記低In領域は、5〜10nmの平均サイズ及び2〜4nmの平均高さを有し、
前記突起の各々における前記低In領域は、3〜8nmの平均間隔で配置されていることを特徴とする請求項3に記載の半導体発光素子。 - 前記半極性面は、(20−2−1)面、(20−21)面、(11−22)面、(10−1−1)面、(30−31)面又は(30−3−1)面であることを特徴とする請求項1乃至4のいずれか1つに記載の半導体発光素子。
- 半導体基板の半極性面上に、複数の突起を有する表面を有するInAlN層を第1の温度で成長する第1の工程と、前記第1の温度よりも低い第2の温度で前記InAlN層の前記表面にNH3を供給し、前記複数の突起の各々の頂部に前記InAlN層内の他の領域よりも低いIn組成の低In領域を形成する第2の工程と、前記InAlN層の前記表面上にGaN層を成長する第3の工程と、をこの順で複数回繰り返し、前記InAlN層及び前記GaN層からなる分布ブラッグ反射鏡を形成する工程と、
前記分布ブラッグ反射鏡上に、活性層を含む半導体構造層を成長する工程と、を含むことを特徴とする半導体発光素子の製造方法。 - 前記第2の温度は、前記第1の温度よりも10℃〜20℃の範囲内で低いことを特徴とする請求項6に記載の半導体発光素子の製造方法。
- 前記第2の温度を保持して前記第3の工程を行うことを特徴とする請求項6又は7に記載の半導体発光素子の製造方法。
- 前記第3の工程において、TEGを供給ガスとして前記GaN層を成長することを特徴とする請求項8に記載の半導体発光素子の製造方法。
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US20190355874A1 (en) * | 2018-05-20 | 2019-11-21 | Black Peak LLC | High brightness light emitting device with small size |
US10566317B2 (en) * | 2018-05-20 | 2020-02-18 | Black Peak LLC | Light emitting device with small size and large density |
JP7227469B2 (ja) * | 2019-01-29 | 2023-02-22 | 日亜化学工業株式会社 | 垂直共振器面発光レーザ素子 |
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