发明授权
- 专利标题: Contact etching and metallization for improved LED device performance and reliability
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申请号: US15777255申请日: 2016-11-14
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公开(公告)号: US10529894B2公开(公告)日: 2020-01-07
- 发明人: David Chong , Yeow-Meng Teo
- 申请人: David Chong , Yeow-Meng Teo
- 申请人地址: NL Schiphol
- 专利权人: Lumileds Holding B.V.
- 当前专利权人: Lumileds Holding B.V.
- 当前专利权人地址: NL Schiphol
- 代理机构: Volpe and Koenig, PC
- 优先权: EP16159678 20160310
- 国际申请: PCT/US2016/061816 WO 20161114
- 国际公布: WO2017/087315 WO 20170526
- 主分类号: H01L33/38
- IPC分类号: H01L33/38 ; H01L33/44 ; H01L33/46 ; H01L33/40 ; H01L33/06
摘要:
A light emitting device includes a vertical via through the P-type semiconductor layer and the active layer. Using a vertical via reduces quantum well damage, allows shortening of P-N spacing, and allows increased reflective area. A dielectric structure is formed in the via to provide a sloped wall that extends to an upper surface of the device. Another dielectric layer covers the upper surface and the sloped wall, and provides select contacts to the semiconductor layers. A metal layer is subsequently applied. Because the dielectric layers provide a continuous slope from the surface of the device, the metal layer does not include a vertical drop. Because the active layer does not extend into the via, the contact to the N-type semiconductor layer may be situated closer to the wall of the via, increasing the area available for a reflective layer.
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