Light-emitting device having a patterned surface

US9608162B2 · kind B2 · utility

Assignee

• Epistar Corporation · TW

Inventors

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

Key dates

• Filing date: Jan 15, 2016
• Grant date: Mar 28, 2017
• Expiry date: Jan 15, 2036

Classification

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

Abstract

A light-emitting device comprises a substrate having a top surface and a plurality of patterned units protruding from the top surface; and a light-emitting stack formed on the substrate and having an active layer with a first surface substantially parallel to the top surface; wherein one of the plurality of patterned units has a vertex, a first inclined surface, and a second inclined surface, and the first inclined surface and the second inclined surface commonly join at the vertex from a cross-sectional view of the light-emitting device.