JP2006232655A - 窒化物単結晶基板の製造方法及びこれを利用した窒化物半導体発光素子の製造方法 - Google Patents
窒化物単結晶基板の製造方法及びこれを利用した窒化物半導体発光素子の製造方法 Download PDFInfo
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Abstract
【解決手段】窒化物単結晶基板の製造方法は、母基板21上にZnO層23を形成する段階と、上記ZnO層上にNソースとしてジメチルヒドラジン(DMHyDMHy)を使用して低温窒化物バッファ層24を形成する段階と、上記低温窒化物バッファ層上に窒化物単結晶25を成長させる段階と、上記ZnO層を化学的に除去することにより上記母基板から上記窒化物単結晶を分離させる段階とを含む。
【選択図】 図2
Description
23 ZnO層
24 低温窒化物バッファ層
25 窒化物単結晶
Claims (20)
- 母基板上にZnO層を形成する段階;
上記ZnO層上にNソースとしてジメチルヒドラジン(DMHy)を使用して低温窒化物バッファ層を形成する段階;
上記低温窒化物バッファ層上に窒化物単結晶を成長させる段階;及び
上記ZnO層を化学的に除去することにより上記母基板から上記窒化物単結晶を分離させる段階
を含む窒化物単結晶基板の製造方法。 - 前記母基板はサファイア、SiC及びシリコン基板のからなる群から選ばれた一つから成る請求項1に記載の窒化物単結晶基板の製造方法。
- 前記低温窒化物バッファ層はAlxGayIn1-x-yNであり、ここで0≦x≦1、0≦y≦1である請求項1又は2に記載の窒化物単結晶基板の製造方法。
- 前記低温窒化物バッファ層を形成する段階は約400℃以下において行われる請求項1、2又は3に記載の窒化物単結晶基板の製造方法。
- 母基板上に酸化膜または窒化膜から成る犠牲層を形成する段階;
前記犠牲層上に多結晶状のZnO層を形成する段階;
前記ZnO層を部分的に分解してナノサイズのZnOパターンを形成する段階;
前記ZnOパターンをシードとして低温窒化物バッファ層を形成する段階;及び、
前記犠牲層を化学的に除去することにより前記母基板から前記窒化物単結晶を分離させる段階
を含む窒化物単結晶基板の製造方法。 - 前記母基板はサファイア、SiC及びシリコン基板からなる群から選ばれた一つから成る請求項5に記載の窒化物単結晶基板の製造方法。
- 前記低温窒化物バッファ層はAlxGayIn1-x-yNであり、ここで0≦x≦1、0≦y≦1である請求項5又は6に記載の窒化物単結晶基板の製造方法。
- 前記ナノサイズのZnOパターンを形成する段階は、前記低温窒化物バッファ層の成長温度におけるZnOの熱分解を通して行われる請求項5、6又は7に記載の窒化物単結晶基板の製造方法。
- 前記低温窒化物バッファ層を形成する段階は400〜700℃の範囲において行われる請求項8に記載の窒化物単結晶基板の製造方法。
- 前記窒化物単結晶を分離する段階は、前記犠牲層と共に前記ZnOパターンを除去する段階であり、これにより前記ZnOパターンの除去された表面が凹凸パターンを有する請求項5〜9のいずれか一項に記載の窒化物単結晶基板の製造方法。
- 母基板上にZnO層を形成する段階;
前記ZnO層上にNソースとしてジメチルヒドラジン(DMHy)を使用して第1導電型低温窒化物バッファ層を形成する段階;
前記低温窒化物バッファ層上に第1導電型窒化物層、活性層及び第2導電型窒化物層を含む半導体構造物を形成する段階; 並びに
前記ZnO層を化学的に除去することにより前記母基板から前記発光構造物を分離させる段階
を含む窒化物半導体発光素子の製造方法。 - 前記母基板はサファイア、SiC及びシリコン基板からなる群から選ばれた一つから成る請求項11に記載の窒化物半導体発光素子の製造方法。
- 前記低温窒化物バッファ層はAlxGayIn1-x-yNであり、ここで0≦x≦1、0≦y≦1である請求項11又は12に記載の窒化物半導体発光素子の製造方法。
- 前記低温窒化物バッファ層を形成する段階は約400℃以下において行われる請求項11、12又は13に記載の窒化物半導体発光素子の製造方法。
- 母基板上に酸化膜または窒化膜から成る犠牲層を形成する段階;
前記犠牲層上に多結晶状であるZnO層を形成する段階;
前記ZnO層を部分的に分解してナノサイズのZnOパターンを形成する段階;
前記ZnOパターンをシードにして第1導電型低温窒化物バッファ層を形成する段階;
前記低温窒化物バッファ層上に第1導電型窒化物層、活性層及び第2導電型窒化物層を含む発光構造物を形成する段階; 並びに
前記犠牲層を化学的に除去することにより前記母基板から前記発光構造物を分離させる段階
を含む窒化物半導体発光素子の製造方法。 - 前記母基板はサファイア、SiC及びシリコン基板からなる群から選ばれた一つから成る請求項15に記載の窒化物半導体発光素子の製造方法。
- 前記低温窒化物バッファ層はAlxGayIn1-x-yNであり、ここで0≦x≦1、0≦y≦1である請求項15又は16に記載の窒化物半導体発光素子の製造方法。
- 前記ナノサイズのZnOパターンを形成する段階は、前記低温窒化物バッファ層の成長温度におけるZnOの熱分解により行われる請求項15、16又は17に記載の窒化物半導体発光素子の製造方法。
- 前記低温窒化物バッファ層を形成する段階は400〜700℃の範囲において行われる請求項18に記載の窒化物半導体発光素子の製造方法。
- 前記窒化物単結晶を分離する段階は、前記犠牲層と共に前記ZnOパターンを除去する段階であり、これにより前記ZnOパターンが除去された表面が凹凸パターンを有する請求項15〜19のいずれか一項に記載の窒化物半導体発光素子の製造方法。
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JP2009260003A (ja) * | 2008-04-16 | 2009-11-05 | Stanley Electric Co Ltd | 半導体素子の製造方法 |
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JP2009530798A (ja) | 2006-01-05 | 2009-08-27 | イルミテックス, インコーポレイテッド | Ledから光を導くための独立した光学デバイス |
KR100867518B1 (ko) * | 2006-09-06 | 2008-11-07 | 삼성전기주식회사 | 질화물계 반도체 발광소자의 제조방법 |
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JP2013227178A (ja) * | 2012-04-26 | 2013-11-07 | Shin Etsu Handotai Co Ltd | GaN自立基板の製造方法 |
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JP5135501B2 (ja) | 2013-02-06 |
US20090087937A1 (en) | 2009-04-02 |
US7811902B2 (en) | 2010-10-12 |
KR20060093528A (ko) | 2006-08-25 |
JP2009023909A (ja) | 2009-02-05 |
KR100631905B1 (ko) | 2006-10-11 |
US20060189020A1 (en) | 2006-08-24 |
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