Light-emitting device having a patterned surface

US8633501B2 · kind B2 · utility

Assignee

• Epistar Corporation · TW

Inventors

• Chen Ou · Hsinchu, TW
• Chiu-Lin Yao · Hsinchu, TW

Key dates

• Filing date: Dec 23, 2009
• Grant date: Jan 21, 2014
• Expiry date: Mar 21, 2031

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/882

Abstract

The disclosure provides a light-emitting device comprising a substrate, an intermediate layer formed on the substrate, a first doped semiconductor layer with first conductivity-type formed on the intermediate layer, a second doped semiconductor layer with second conductivity-type formed on the first doped semiconductor layer, an active layer formed between the first doped semiconductor layer and the second doped semiconductor layer, and a patterned surface having a plurality of ordered pattern units; wherein the patterned surface is substantially not parallel to the corresponding region of the surface of the active layer.