Light-emitting device

US9276176B2 · kind B2 · utility

Assignee

• Epistar Corporation · TW

Inventors

• Wen-Luh Liao · Hsinchu, TW
• Hung-Ta Cheng · Hsinchu, TW
• Yao-Ru CHANG · Hsinchu, TW
• Shih-I Chen · Hsinchu, TW
• Chia-Liang Hsu · Hsinchu, TW

Key dates

• Filing date: Oct 15, 2014
• Grant date: Mar 1, 2016
• Expiry date: Oct 15, 2034

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/84

Abstract

A light-emitting device comprises: a light-emitting stack having an active layer; a transparent insulating layer on the light-emitting stack; and an electrode structure having a first electrode on the transparent insulating layer; wherein a surface area of a surface of the first electrode distal from the transparent insulating layer is smaller than a surface area of a surface of the transparent insulating layer distal from the light-emitting stack, the refractive index of the transparent insulating layer is between 1 and 3.4 both inclusive, and the transmittance of the transparent insulating layer is greater than 80%.