发明申请
- 专利标题: Led with substrate modifications for enhanced light extraction and method of making same
- 专利标题(中): 带有基板修改以增强光提取及其制造方法
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申请号: US12384277申请日: 2009-04-01
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公开(公告)号: US20090233394A1公开(公告)日: 2009-09-17
- 发明人: Max Batres , James Ibbetson , Ting Li , Adam W. Saxler
- 申请人: Max Batres , James Ibbetson , Ting Li , Adam W. Saxler
- 专利权人: CREE, INC.
- 当前专利权人: CREE, INC.
- 主分类号: H01L33/00
- IPC分类号: H01L33/00 ; H01L21/3065
摘要:
The surface morphology of an LED light emitting surface is changed by applying a reactive ion etch (RIE) process to the light emitting surface. Etched features, such as truncated pyramids, may be formed on the emitting surface, prior to the RIE process, by cutting into the surface using a saw blade or a masked etching technique. Sidewall cuts may also be made in the emitting surface prior to the RIE process. A light absorbing damaged layer of material associated with saw cutting is removed by the RIE process. The surface morphology created by the RIE process may be emulated using different, various combinations of non-RIE processes such as grit sanding and deposition of a roughened layer of material or particles followed by dry etching.
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