Light emitting device with pillar structure having hollow structure
US8232567B2 · kind B2 · utility
10Cited by
9References
9Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 17, 2009 |
| Grant date | Jul 31, 2012 |
| Priority date | — |
| Expiry date | Sep 21, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/833
Abstract
A light emitting device, includes a substrate; a first semiconductor layer on the substrate; an active layer on the first semiconductor layer; a second semiconductor layer on the active layer; a transparent conductive layer on the second semiconductor layer; and a plurality of pillar structures with a hollow structure in the portion surface of the first semiconductor layer, thereby, the light extraction efficiency of the light emitting device can be improved due to the pillar structures with a hollow structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.