JP4933130B2 - GaN系半導体発光素子およびその製造方法 - Google Patents
GaN系半導体発光素子およびその製造方法 Download PDFInfo
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- JP4933130B2 JP4933130B2 JP2006111833A JP2006111833A JP4933130B2 JP 4933130 B2 JP4933130 B2 JP 4933130B2 JP 2006111833 A JP2006111833 A JP 2006111833A JP 2006111833 A JP2006111833 A JP 2006111833A JP 4933130 B2 JP4933130 B2 JP 4933130B2
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Description
1A GaN系半導体発光素子
1B GaN系半導体発光素子
1C GaN系半導体発光素子
1D GaN系半導体発光素子
1E GaN系半導体発光素子
10 第1積層体
10A 積層体
11 基板
12 GaN系半導体各層
13 介在層
14 第1接合層
30 第2積層体
31 導電性基板
32 中間層
33 第2接合層
80 ランプ
81 フレーム
82 フレーム
83 ワイヤー
84 モールド
100 第1積層体
101 基板
102 GaN層
103 n型半導体層
104 発光層
105 p型半導体層
106 オーミックコンタクト層
107 反射層
108 第1接合層
110 第1積層体
111 基板
112−1 バッファ層
112−2 下地層
113 n型半導体層
114 発光層
115 p型半導体層
116 オーミックコンタクト層
117−1 反射層
117−2 相互拡散防止層
118 第1接合層
119 テーパ層
300 第2積層体
301 導電性基板
302 格子整合層
303 第2接合層
310 第2積層体
311 導電性基板
312 格子整合層
313 第2接合層
320 第2積層体
321 シリコン基板
322 配向調整層
323 相互拡散防止層
324 第2接合層
401 基板ホルダー
402 接合サンプル
403 不活性ガスイオンビーム源または不活性ガス中性原子ビーム源
501 正極
502 負極
511 正極
512−1 ITO
512−2 負極
521 正極
522−1 ITO
522−2 負極
Claims (19)
- GaN系半導体からなる各層を備えるGaN系半導体発光素子において、
n型半導体層、発光層およびp型半導体層のGaN系半導体からなる各層が順に積層され、最上層に金属からなる第1の接合層を有する積層体と、
導電性基板上に形成されているとともに、その導電性基板が形成されている側とは反対側の面が上記第1の接合層と接合しその第1の接合層とは同じ結晶構造の金属からなりかつ接合面直方向と接合面内方向の結晶方位が共に同一である第2の接合層と、
を有することを特徴とするGaN系半導体発光素子。 - 上記導電性基板と上記第2の接合層との間に格子整合層が形成されている、請求項1に記載のGaN系半導体発光素子。
- 上記格子整合層はHf、Mg、およびZrから選ばれる何れか1種類の単体金属または2種類以上の合金金属からなる、請求項2に記載のGaN系半導体発光素子。
- 上記第1の接合層および第2の接合層は、面心立方構造を有し、接合面直方向の結晶方位が(111)である、請求項1から3の何れかに記載のGaN系半導体発光素子。
- 上記第1の接合層および第2の接合層は、Au、Ag、Cu、Pt、Pd、Rh、Cu、Irの何れかから形成されている、請求項4に記載のGaN系半導体発光素子。
- 上記第1の接合層および第2の接合層は、AuまたはAu合金である、請求項5に記載のGaN系半導体発光素子。
- 上記第1の接合層および第2の接合層は、六方最密充填構造を有し、接合面直方向の結晶方位が(00・1)である、請求項1から3の何れかに記載のGaN系半導体発光素子。
- 上記第1の接合層および第2の接合層は、RuまたはReから形成されている、請求項7に記載のGaN系半導体発光素子。
- 上記第1の接合層および第2の接合層は、格子定数の差が5%以内である、請求項1から8の何れかに記載のGaN系半導体発光素子。
- 上記導電性基板はシリコン単結晶からなるシリコン基板である、請求項1から9の何れかに記載のGaN系半導体発光素子。
- 上記導電性基板はシリコン単結晶からなるシリコン基板であり、基板表面が(111)面を有している、請求項10に記載のGaN系半導体発光素子。
- 上記第2の接合層は、上記シリコン基板の(111)面上に直接成膜されている、請求項11に記載のGaN系半導体発光素子。
- 上記シリコン基板と上記第2の接合層との間に配向調整層が形成されている、請求項11に記載のGaN系半導体発光素子。
- 上記配向調整層はAgまたはAg合金から形成されている、請求項13に記載のGaN系半導体発光素子。
- GaN系半導体からなる各層を備えるGaN系半導体発光素子の製造方法において、
基板上に少なくともn型半導体層、発光層およびp型半導体層のGaN系半導体からなる各層を順に積層させ、最上層に金属からなる第1の接合層を有する第1の積層体を形成する工程と、
導電性基板上に少なくとも、上記第1の接合層とは同じ結晶構造の金属からなりかつ接合面直方向と接合面内方向の結晶方位が共に同一である第2の接合層を有する第2の積層体を形成する工程と、
上記第1の積層体と上記第2の積層体とを、第1の接合層と第2の接合層同士を接合させることにより一体化させる工程と、
上記第1の積層体から基板を除去する工程と、
を有することを特徴とするGaN系半導体発光素子の製造方法。 - 上記第1の接合層と第2の接合層同士の接合は、各接合層の接合面に真空中で不活性ガスイオンビームまたは不活性ガス中性原子ビームを照射して行う、請求項15に記載のGaN系半導体発光素子の製造方法。
- 上記基板はサファイアである、請求項15または16に記載のGaN系半導体発光素子の製造方法。
- 上記第2の積層体を形成する工程において、上記導電性基板はシリコン単結晶からなるシリコン基板であり、基板表面が(111)面を有し、そのシリコン基板上に、Au,Ag,Cu,Pt,Pd,Rh,Cu,Ir等の面心立方構造(111)面を有する第2の接合層、またはRu,Re等の六法最密充填の(00・1)面を有する第2の接合層を形成する場合、先ずシリコン基板表面をRCA洗浄等で基板表面を洗浄した後に、希フッ酸等で表面を水素終端化させ、その後、超高真空を有する成膜装置を用いて第2の接合層を成膜する、
請求項15から17の何れか1項に記載のGaN系半導体発光素子の製造方法。 - 上記超高真空の真空度は1.0×10-4Paより高い高真空である、請求項18に記載のGaN系半導体発光素子の製造方法。
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TWI355755B (en) | 2012-01-01 |
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TWI463693B (zh) | 2014-12-01 |
TWI467800B (zh) | 2015-01-01 |
KR101147705B1 (ko) | 2012-05-23 |
WO2007094516A8 (en) | 2008-10-23 |
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