Invention Application
US20140151738A1 ROUGHENED HIGH REFRACTIVE INDEX LAYER/LED FOR HIGH LIGHT EXTRACTION
审中-公开
用于高光提取的粗糙度高折射率指数层/ LED
- Patent Title: ROUGHENED HIGH REFRACTIVE INDEX LAYER/LED FOR HIGH LIGHT EXTRACTION
- Patent Title (中): 用于高光提取的粗糙度高折射率指数层/ LED
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Application No.: US14173662Application Date: 2014-02-05
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Publication No.: US20140151738A1Publication Date: 2014-06-05
- Inventor: STEVEN P. DENBAARS , JAMES IBBETSON , SHUJI NAKAMURA
- Applicant: CREE, INC.
- Applicant Address: US NC DURHAM
- Assignee: CREE, INC.
- Current Assignee: CREE, INC.
- Current Assignee Address: US NC DURHAM
- Main IPC: H01L33/22
- IPC: H01L33/22 ; H01L33/42
Abstract:
A light emitting diode (LED) includes a p-type layer of material, an n-type layer of material and an active layer between the p-type layer and the n-type layer. A roughened layer of transparent material is adjacent one of the p-type layer of material and the n-type layer of material. The roughened layer of transparent material has a refractive index close to or substantially the same as the refractive index of the material adjacent the layer of transparent material, and may be a transparent oxide material or a transparent conducting material. An additional layer of conductive material may be between the roughened layer and the n-type or p-type layer.
Information query
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