JP5113446B2 - 半導体素子およびその製造方法 - Google Patents
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Description
図3は、本発明の第1実施形態による半導体レーザ素子の構造を示した平面図である。図4は、図3の2000−2000線に沿った断面図であり、図5は、図3の3000−3000線に沿った断面図である。図6は、図3に示した一実施形態による半導体レーザ素子の発光層の構造を示した断面図である。まず、図3〜図6を参照して、第1実施形態による半導体レーザ素子の構造について説明する。なお、第1実施形態では、半導体素子の一例である半導体レーザ素子に本発明を適用した場合について説明する。また、第1実施形態による半導体レーザ素子の発振波長は、約410nmであり、レーザ光の偏光は、TMモードである。なお、図3〜図5において、添字GaNの前に記載されている結晶方位は半導体素子部10の結晶方位であり、添字6H−SiCの前に記載されている結晶方位は支持基板30の結晶方位である。また、図3および図4においては、半導体素子部10のオフ角度を省略した半導体素子部10の結晶方位を示した。
図16は、本発明の第2実施形態によるGaN系半導体レーザ素子の構造を示した平面図であり、図17は、図16の4000−4000線に沿った断面図である。図16および図17を参照して、この第2実施形態では、上記第1実施形態と異なり、支持基板を用いない構造のGaN系半導体レーザ素子について説明する。なお、第2実施形態では、半導体素子の一例であるGaN系半導体レーザ素子に本発明を適用した場合について説明する。また、第2実施形態によるGaN系半導体レーザ素子の発振波長は、約410nmである。
図18および図19は、本発明の第3実施形態による発光ダイオード(LED)素子の構造を示した図である。図18および図19を参照して、第3実施形態によるLED素子の構造について説明する。なお、第3実施形態では、半導体素子の一例であるLED素子に本発明を適用した場合について説明する。また、第3実施形態による発光ダイオード素子のピーク波長は、約480nmである。
図20は、本発明の第4実施形態によるGaN系半導体レーザ素子の構造を示した平面図である。図21は、図20の5000−5000線に沿った断面図である。図20および図21を参照して、この第4実施形態では、上記第1実施形態と異なり、支持基板を用いない構造のGaN系半導体レーザ素子について説明する。なお、第4実施形態では、半導体素子の一例であるGaN系半導体レーザ素子に本発明を適用した場合について説明する。また、第4実施形態によるGaN系半導体レーザ素子の発振波長は、約410nmである。
1a、30a、40a、140a、200a、340a 主面(第2の面)
2、10、110、310 半導体素子部
2a、110b、210a、310b 主面(第1の面)
10a 一方主面(第1の面)
10b 他方主面(第1の面)
23、70、150、220 半田層(接着層)
30、200 支持基板(基体)
40、140、340 サブマウント(基体)
71 GaN基板(成長用基板)
210 LED素子部(半導体素子部)
Claims (10)
- 第1の面を有するとともに、前記第1の面の面内方向において異なる熱膨張係数を有する複数の方向を含む半導体素子部と、
第2の面を有するとともに、前記第2の面の面内方向において異なる熱膨張係数を有する複数の方向を含み、かつ、前記半導体素子部の第1の面が前記第2の面と接合された基体とを備え、
前記半導体素子部の第1の面における熱膨張係数の最も大きい方向が、前記基体の第2の面における熱膨張係数の最も小さい方向よりも最も大きい方向側に近くなるように、前記基体に対して前記半導体素子部が接合されている、半導体素子。 - 前記半導体素子部の第1の面の面内方向における熱膨張係数の最も大きい方向は、前記基体の第2の面の面内方向における熱膨張係数の最も大きい方向と実質的に一致する、請求項1に記載の半導体素子。
- 前記半導体素子部の第1の面の面内方向における最も大きい熱膨張係数および最も小さい熱膨張係数がそれぞれαELおよびαESであり、
前記基体の第2の面の面内方向における最も大きい熱膨張係数および最も小さい熱膨張係数がそれぞれαSLおよびαSSである場合、
前記基体と前記半導体素子部との各方向の熱膨張係数の間には、少なくともαSL≧αEL>αSSまたはαSL>αES≧αSSまたはαEL≧αSL>αESまたはαEL>αSS≧αESのうちのいずれか一つの関係が成り立っている、請求項1または2に記載の半導体素子。 - 前記半導体素子部の第1の面の面内方向における最も大きい熱膨張係数および最も小さい熱膨張係数がそれぞれαELおよびαESであり、
前記基体の第2の面の面内方向における最も大きい熱膨張係数および最も小さい熱膨張係数がそれぞれαSLおよびαSSである場合、
|αSL−αEL|>|αSS−αES|であれば、長辺の方向の熱膨張係数がαESとなるように前記半導体素子部の第1の面が長方形状に形成され、
|αSL−αEL|<|αSS−αES|であれば、長辺の方向の熱膨張係数がαELとなるように前記半導体素子部の第1の面が長方形状に形成されている、請求項1または2に記載の半導体素子。 - 前記半導体素子部の第1の面の面内方向における熱膨張係数の最も大きい方向と、前記半導体素子部の第1の面の面内方向における熱膨張係数の最も小さい方向とを区別できるように、前記半導体素子部の外観が形成されている、請求項1〜3のいずれか1項に記載の半導体素子。
- 前記半導体素子部の前記第1の面の形状が、略長方形に形成されている、請求項1〜3のいずれか1項に記載の半導体素子。
- 前記半導体素子部は、前記第1の面を有するとともに、六方晶構造またはウルツ鉱構造を有する半導体層を含み、
前記第1の面は、HおよびKの少なくともいずれか一方が0ではない整数とした場合に、実質的に(H、K、−H−K、0)面である、請求項1〜6のいずれか1項に記載の半導体素子。 - 前記基体の第2の面と、前記半導体素子部の第1の面とを接合するための接着層をさらに備える、請求項1〜7のいずれか1項に記載の半導体素子。
- 第1の面を有するとともに、前記第1の面の面内方向において異なる熱膨張係数を有する複数の方向を含む半導体素子部を形成する工程と、
第2の面を有するとともに、前記第2の面の面内方向において異なる熱膨張係数を有する複数の方向を含む基体の前記第2の面に、前記第1の面における熱膨張係数の最も大きい方向が前記第2の面における熱膨張係数の最も小さい方向よりも最も大きい方向側に近くなるように、前記半導体素子部の前記第1の面を接合する工程とを備える、半導体素子の製造方法。 - 前記半導体素子部を形成する工程は、面内方向において異なる熱膨張係数を有する複数の方向を含む成長用基板の表面上に、前記第1の面の面内方向において異なる熱膨張係数を有する複数の方向を含む前記半導体素子部を成長する工程を含む、請求項9に記載の半導体素子の製造方法。
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JP2007204962A JP5113446B2 (ja) | 2006-08-11 | 2007-08-07 | 半導体素子およびその製造方法 |
CN2007800297641A CN101501947B (zh) | 2006-08-11 | 2007-08-08 | 半导体元件和其制造方法 |
US12/161,358 US20100219419A1 (en) | 2006-08-11 | 2007-08-08 | Semiconductor element and method for manufacturing the same |
PCT/JP2007/065483 WO2008018482A1 (fr) | 2006-08-11 | 2007-08-08 | Élément semi-conducteur et son procédé de fabrication |
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KR100998008B1 (ko) * | 2007-12-17 | 2010-12-03 | 삼성엘이디 주식회사 | 소자 형성용 기판의 제조방법 및 질화물계 반도체 레이저다이오드의 제조방법 |
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US20100219419A1 (en) | 2010-09-02 |
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