Light emitting diode substrate and light emitting diode
US8624279B2 · kind B2 · utility
4Cited by
0References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 16, 2012 |
| Grant date | Jan 7, 2014 |
| Priority date | — |
| Expiry date | May 16, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/01335
Abstract
A light emitting diode (LED) substrate includes a sapphire substrate which is characterized by having a surface consisting of irregular hexagonal pyramid structures, wherein a pitch of the irregular hexagonal pyramid structure is less than 10 μm. A symmetrical cross-sectional plane of each of the irregular hexagonal pyramid structures has a first base angle and a second base angle, wherein the second base angle is larger than the first base angle, and the second base angle is 50° to 70°. This LED substrate has high light-emitting efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.