Surface-emitting semiconductor light device
US6900473B2 · kind B2 · utility
51Cited by
8References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2002 |
| Grant date | May 31, 2005 |
| Priority date | — |
| Expiry date | Aug 18, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/831
Abstract
A semiconductor light emitting device is disclosed in which a semiconductor multilayer structure including a light emitting layer is formed on a substrate and light is output from the opposite surface of the semiconductor multilayer structure from the substrate. The light output surface is formed with a large number of protrusions in the form of cones or pyramids. To increase the light output efficiency, the angle between the side of each protrusion and the light output surface is set to between 30 and 70 degrees.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.