JP5285835B2 - 半導体素子およびその製造方法 - Google Patents
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- H01S5/34333—Structure or shape of the active region; Materials used for the active region comprising quantum well or superlattice structures, e.g. single quantum well [SQW] lasers, multiple quantum well [MQW] lasers or graded index separate confinement heterostructure [GRINSCH] lasers in AIIIBV compounds, e.g. AlGaAs-laser, InP-based laser with a well layer based on Ga(In)N or Ga(In)P, e.g. blue laser
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- H01S5/2205—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers having a ridge or stripe structure comprising special burying or current confinement layers
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Description
K. Itaya他、「Effect of facet coating on the reliability of InGaAlP visible light laser diodes」、Applied Physics Letters、1988年10月10日、第53巻、第15号、pp.1363−1365.
前記化合物半導体層の側面上に窒化物からなる第1保護層を形成する工程と、
前記第1保護層上に前記第1保護層と屈折率の異なる窒化物からなる第2保護層を形成する工程と
を備えたことを特徴とする。
本発明の第1実施形態による半導体素子の断面を図1に示す。本実施形態の半導体素子は、以下のように形成される。
また、本実施形態の変形例として、本実施形態のレーザダイオードの形成する際に、端面に窒化物からなる保護膜を形成する前に、ECRスパッタ装置内で端面に窒素プラズマ処理を施したレーザダイオードを作製した。この変形例のレーザダイオードは、上記の試験と同一の条件、すなわち光出力60mW、動作温度60℃で連続発振させた条件で寿命が5000時間以上となり、本実施形態の場合よりもさらに大きく改善した。これは、{1−100}面から離脱したNのストイキオメトリーを回復させる機能があるためと考えられる。
次に、本発明の第2実施形態による半導体素子を図4に示す。
12 n型GaN層
13 n型クラッド層
14 n型GaNからなるガイド層
15 活性層
16 p型第1ガイド層
17 オーバーフロー防止層
18 p型GaNからなる第2ガイド層
19 p型クラッド層
20 p型GaNからなるコンタクト層
31 n側電極
32 p側電極
41 絶縁膜(電流ブロック層)
50 端面保護膜
51 第1保護層
52 第2保護層
111…n型GaN{0001}基板
112…n型GaN層
113…n型GaNガイド層
114…活性層
115…p型第1ガイド層
116…オーバーフロー防止層
117…p型GaN第2ガイド層
118…p型クラッド層
119…p型GaNコンタクト層
131…n側電極
132…p側電極
Claims (9)
- 基板と、前記基板上に設けられたn型クラッド層と、前記n型クラッド層上に設けられたn型ガイド層と、前記n型ガイド層上に設けられた活性層と、前記活性層上に設けられたp型ガイド層と、前記p型ガイド層上に設けられたp型クラッド層とを有し、前記層のそれぞれが窒化物系III−V族化合物半導体であるレーザダイオードと、
前記レーザダイオードの出射面となるへき開端面上に設けられアルミニウムを含む窒化物の第1保護層と、
前記第1保護層上に設けられ前記第1保護層と屈折率の異なる、シリコンを含む窒化物の第2保護層と、
を備え、前記第1保護層と、前記第2保護層の膜厚が、それぞれ0.25nm以上50nm以下であることを特徴とする半導体素子。 - 前記第1保護層は、前記第2保護層よりも熱伝導率が高く、前記第2保護層は前記第1保護層よりも耐酸化性が高い材料であることを特徴とする請求項1記載の半導体素子。
- 前記第1保護層は窒化アルミニウム、窒化シリコンアルミニウムのいずれかであることを特徴とする請求項1または2記載の半導体素子。
- 前記第2保護層は、前記第1保護層が窒化アルミニウムである場合には窒化シリコンまたは窒化シリコンアルミニウムであり、前記第1保護層が窒化シリコンアルミニウムである場合には窒化シリコンであることを特徴とする請求項3記載の半導体素子。
- 前記第1保護層が設けられる面は{1−100}面であることを特徴とする請求項1乃至4のいずれかに記載の半導体素子。
- 前記基板はGaN基板であることを特徴とする請求項1乃至5のいずれかに記載の半導体素子。
- 基板上に、レーザダイオードとなる窒化物系III−V族化合物半導体層を形成する工程と、
前記レーザダイオードの出射面となる前記化合物半導体層のへき開端面上にアルミニウムを含む窒化物で膜厚が0.25nm以上50nm以下である第1保護層を形成する工程と、
前記第1保護層上に前記第1保護層の酸化を防ぎ前記第1保護層と屈折率の異なる、シリコンを含む窒化物で膜厚が0.25nm以上50nm以下である第2保護層を形成する工程と
を備えたことを特徴とする半導体素子の製造方法。 - 前記第1および第2保護層は、ECRスパッタ法を用いて形成することを特徴とする請求項7記載の半導体素子の製造方法。
- 前記第1保護層を形成する前に、前記化合物半導体層の前記端面に対して、窒素プラズマ処理を行う工程を備えたことを特徴とする請求項7または8記載の半導体素子の製造方法。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005204436A JP5285835B2 (ja) | 2005-07-13 | 2005-07-13 | 半導体素子およびその製造方法 |
| US11/365,531 US7773648B2 (en) | 2005-07-13 | 2006-03-02 | Semiconductor device and method for manufacturing the same |
| CNB2006101017772A CN100477421C (zh) | 2005-07-13 | 2006-07-10 | 半导体元件及其制造方法 |
| KR1020060065182A KR100813750B1 (ko) | 2005-07-13 | 2006-07-12 | 레이저 다이오드 및 그 제조 방법과 발광 다이오드 |
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| JP2011240549A Division JP2012069970A (ja) | 2011-11-01 | 2011-11-01 | 半導体素子 |
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| JP2007027260A JP2007027260A (ja) | 2007-02-01 |
| JP5285835B2 true JP5285835B2 (ja) | 2013-09-11 |
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| JP4860210B2 (ja) * | 2005-08-26 | 2012-01-25 | シャープ株式会社 | 窒化物半導体レーザ素子およびその製造方法 |
| JP5191650B2 (ja) * | 2005-12-16 | 2013-05-08 | シャープ株式会社 | 窒化物半導体発光素子および窒化物半導体発光素子の製造方法 |
| KR100853241B1 (ko) * | 2005-12-16 | 2008-08-20 | 샤프 가부시키가이샤 | 질화물 반도체 발광소자 및 질화물 반도체 레이저 소자의제조방법 |
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| JP5106558B2 (ja) * | 2010-03-09 | 2012-12-26 | 株式会社東芝 | 発光素子およびその製造方法 |
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- 2006-07-10 CN CNB2006101017772A patent/CN100477421C/zh active Active
- 2006-07-12 KR KR1020060065182A patent/KR100813750B1/ko active Active
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| JP2007027260A (ja) | 2007-02-01 |
| US7773648B2 (en) | 2010-08-10 |
| CN1897374A (zh) | 2007-01-17 |
| KR100813750B1 (ko) | 2008-03-13 |
| KR20070008431A (ko) | 2007-01-17 |
| CN100477421C (zh) | 2009-04-08 |
| US20070014323A1 (en) | 2007-01-18 |
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