Light emitting device having pillar structure with hollow structure and the forming method thereof
AssigneeHuga Optotech Inc.
InventorsJing-Jie DAI, Wen-Chung Shih, Bo-Yuan Huang, Su-Hui Lin, Yu-Chieh Huang
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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.
Claims24
A light emitting device, comprising:
- a substrate;
- a first semiconductor layer disposed on a surface of said substrate;
- an active layer disposed on a first portion surface of said first semiconductor layer;
- a second semiconductor layer disposed on said active layer;
- a transparent conductive layer disposed on said second semiconductor layer;
- and
- a plurality of pillar structures with a hollow structure disposed in a second portion surface of said first semiconductor layer.
A light emitting device, comprising:
- a substrate;
- a first semiconductor layer disposed on a portion surface of said substrate;
- an active layer disposed on said first semiconductor layer;
- a second semiconductor layer disposed on said active layer;
- a transparent conductive layer disposed on said second semiconductor layer;
- and
- a plurality of pillar structures having a hollow structure disposed on a portion surface of said substrate.
Dependencies are inferred from the claim text.