发明申请
- 专利标题: Nitride Semiconductor Light Emitting Element
- 专利标题(中): 氮化物半导体发光元件
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申请号: US12223172申请日: 2007-01-23
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公开(公告)号: US20100224892A1公开(公告)日: 2010-09-09
- 发明人: Ken Nakahara
- 申请人: Ken Nakahara
- 申请人地址: JP Kyoto-shi, Kyoto-fu
- 专利权人: ROHM CO., LTD.
- 当前专利权人: ROHM CO., LTD.
- 当前专利权人地址: JP Kyoto-shi, Kyoto-fu
- 优先权: JP2006-015259 20060124
- 国际申请: PCT/JP2007/050968 WO 20070123
- 主分类号: H01L33/46
- IPC分类号: H01L33/46
摘要:
Provided is a nitride semiconductor light emitting element that has improved light extraction efficiency and a wide irradiation angle of outgoing light irrespective of the reflectance of a metal used for an electrode. An n side anti-reflection layer 2 and a p side Bragg reflection layer 4 are formed so as to sandwich an MQW active layer 3 that serves as a light emitting region, and the nitride semiconductor light emitting element has a double hetero structure. On top of the n side anti-reflection layer 2, an n electrode 1 is formed. Meanwhile, at the lower side of the p side Bragg reflection layer 4, a p electrode 5, a reflection film 7, and a pad electrode 8 are formed, and the pad electrode is bonded to a support substrate 10 with a conductive bonding layer 9 interposed in between. Both the n side anti-reflection layer 2 and the p side Bragg reflection layer 4 also serve as contact layers. The n side anti-reflection layer 2 is disposed on the light-extracting-direction side while the p side Bragg reflection layer 4 is disposed on the opposite side to the light-extracting-direction side. Consequently, the light extraction efficiency is improved.
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