JP4855695B2 - 窒化物半導体素子及びその製造方法 - Google Patents
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Description
Ga(l)+HCl(g)→GaCl(g)+1/2H2(g)
GaCl(g)+NH3→GaN+HCl(g)+H2
HCl(g)+NH3→NH4Cl(g)
<実施の形態>
110 半導体ナノバー
120 GaN薄膜
210 n−タイプ半導体ナノバー
220 n−タイプGaN薄膜
230 p−タイプGaN薄膜
Claims (24)
- 基板と、
前記基板上に成長された棒状の多数の半導体ナノバーと、
前記半導体ナノバーの間と前記半導体ナノバーの上部とに蒸着分布され、紫外線、可視光線又は赤外線領域の光を放出する窒化物半導体薄膜と、を含み、
前記半導体ナノバーは、
SiC又はシリコンからなり、
Mg、Cd、Ti、Li、Cu、Al、Ni、Y、Ag、Mn、V、Fe、La、Ta、Nb、Ga、In、S、Se、P、As、Co、Cr、B、N、Sb及びHよりなる群から選択された1種以上の異種物質を追加的に含むこと
を特徴とする窒化物半導体素子。 - 前記半導体ナノバーと前記窒化物半導体薄膜とは、結晶構造が同一であること
を特徴とする請求項1に記載の窒化物半導体素子。 - 前記半導体ナノバーと前記窒化物半導体薄膜とは、結晶定数差が少なくとも20%以内であること
を特徴とする請求項1に記載の窒化物半導体素子。 - 前記半導体ナノバーは、前記基板に対して垂直方向にランダムに配列されていること
を特徴とする請求項1に記載の窒化物半導体素子。 - 前記半導体ナノバーの直径は1〜1000nmであり、長さは10nm〜100μmであること
を特徴とする請求項1に記載の窒化物半導体素子。 - 前記窒化物半導体薄膜は、GaN、AlN、InN又はこれらの結合(Ga1−XAl1−YIn1−ZN、0≦x、y、z≦1)からなった膜であること
を特徴とする請求項1に記載の窒化物半導体素子。 - 前記窒化物半導体薄膜は、Si、Ge、Mg、Zn、O、Se、Mn、Ti、Ni及びFeよりなる群から選択された1種以上の異種物質を追加に含むこと
を特徴とする請求項6に記載の窒化物半導体素子。 - 前記基板は、シリコン基板、ガラス基板、酸化シリコン(SiO2)基板、サファイア基板、ITO基板、石英基板又は金属基板からなること
を特徴とする請求項1に記載の窒化物半導体素子。 - 基板を用意する段階と、
前記基板上に所定の反応前駆体を反応させて垂直方向に成長された棒状の多数の半導体ナノバーを形成する段階と、
前記半導体ナノバーをシード(Seed)として利用して前記半導体ナノバーが形成された基板上に、紫外線、可視光線又は赤外線領域の光を放出する窒化物半導体薄膜を蒸着する段階と、を含み、
前記半導体ナノバーは、
SiC又はシリコンにより形成され、
Mg、Cd、Ti、Li、Cu、Al、Ni、Y、Ag、Mn、V、Fe、La、Ta、Nb、Ga、In、S、Se、P、As、Co、Cr、B、N、Sb及びHよりなる群から選択された1種以上の異種物質を追加的に含むように形成されること
を特徴とする窒化物半導体素子の製造方法。 - 前記半導体ナノバーと前記窒化物半導体薄膜とは、結晶構造が同一である物質により形成すること
を特徴とする請求項9に記載の窒化物半導体素子の製造方法。 - 前記半導体ナノバーと前記窒化物半導体薄膜とは、結晶定数差が少なくとも20%以内である物質により形成すること
を特徴とする請求項9に記載の窒化物半導体素子の製造方法。 - 前記半導体ナノバーは、前記基板に対して垂直方向にランダムに配列されるように形成すること
を特徴とする請求項9に記載の窒化物半導体素子の製造方法。 - 前記半導体ナノバーの直径は、1〜1000nmであり、長さは、10nm〜100μmであること
を特徴とする請求項9に記載の窒化物半導体素子の製造方法。 - 前記窒化物半導体薄膜は、GaN、AlN、InN又はこれらの結合(Ga1−XAl1−YIn1−ZN、0≦x、y、z≦1)からなった膜により形成すること
を特徴とする請求項9に記載の窒化物半導体素子の製造方法。 - 前記窒化物半導体薄膜は、Si、Ge、Mg、Zn、O、Se、Mn、Ti、Ni及びFeよりなる群から選択された1種以上の異種物質を追加に含むように形成すること
を特徴とする請求項14に記載の窒化物半導体素子の製造方法。 - 前記基板は、シリコン基板、ガラス基板、酸化シリコン(SiO2)基板、サファイア基板、ITO基板、石英基板又は金属基板からなること
を特徴とする請求項9に記載の窒化物半導体素子の製造方法。 - 前記半導体ナノバーは、化学蒸着法、スパッタリング法、熱又は電子ビーム蒸発法、パルスレーザー蒸着法又は気相移送法の中から選ばれた一つの方法を利用して形成すること
を特徴とする請求項9に記載の窒化物半導体素子の製造方法。 - 前記半導体ナノバーは、有機金属化学蒸着法を利用して形成すること
を特徴とする請求項9に記載の窒化物半導体素子の製造方法。 - 前記窒化物半導体薄膜は、有機金属化学蒸着法(MOCVD)、分子ビームエピタキシ薄膜蒸着法(MBE)又はHVPE法(Hydride Vapor Phase Epitaxy)を利用して形成すること
を特徴とする請求項9に記載の窒化物半導体素子の製造方法。 - 前記半導体ナノバーを形成する段階は、前記基板を反応器内に入れる段階と、
第1の反応前駆体と第2の反応前駆体とを運搬気体を利用して前記反応器内に各々注入する段階と、
所定範囲の温度と所定範囲の圧力とで前記第1の反応前駆体と前記第2の反応前駆体とを化学反応させて前記基板上に棒状の半導体ナノバーを成長させる段階と、を含むこと
を特徴とする請求項9に記載の窒化物半導体素子の製造方法。 - 前記所定範囲の温度は、400〜900℃であり、前記所定範囲の圧力は、10−5〜760mmHgであること
を特徴とする請求項20に記載の窒化物半導体素子の製造方法。 - 前記窒化物半導体薄膜を蒸着する段階は、前記半導体ナノバーが形成された基板を反応器内に入れる段階と、
反応前駆体と窒化物ソースガスとを運搬気体を利用して前記反応器内に各々注入する段階と、
所定範囲の温度と所定範囲の圧力とで前記反応前駆体と前記窒化物ソースガスとを化学反応させて窒化物半導体薄膜を蒸着させる段階と、を含むこと
を特徴とする請求項9に記載の窒化物半導体素子の製造方法。 - 前記反応前駆体は、TMGa、TEGa又はGaCl3であり、前記窒化物ソースガスは、NH3、窒素又は、第3級ブチルアミン(Tertiarybutylamine(N(C4H9)H2)であること
を特徴とする請求項22に記載の窒化物半導体素子の製造方法。 - 前記所定範囲の温度は、300〜1100℃であり、前記所定範囲の圧力は、10−5〜2000mmHgであること
を特徴とする請求項23に記載の窒化物半導体素子の製造方法。
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