Light emitting device

US9705035B1 · kind B1 · utility

Assignee

• Epistar Corporation · TW

Inventors

• Chien-Cheng Huang · Hsinchu, TW
• Kuo-Wei Yen · Hsinchu, TW
• Yu-Wei Kuo · Hsinchu, TW
• Yao-Wei Yang · Danei, TW
• Pei-Hsiang Tseng · Hsinchu, TW

Key dates

• Filing date: Dec 30, 2015
• Grant date: Jul 11, 2017
• Expiry date: Dec 30, 2035

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/034

Abstract

A light emitting device, includes a substrate; a plurality of light emitting stacked layers, comprising a first surface and a second surface; a mesa structure; a current blocking (CB) layer; a transparent conductive layer; a first pad electrode and a second pad electrode; and a passivation layer, wherein the second surface is electrically opposite to the first surface, the transparent conductive layer is disposed on or above the first surface, the first pad electrode is disposed on the transparent conductive layer and on the first surface, and the second pad electrode is disposed on the second surface and on the mesa structure, the CB layer is disposed on the first surface, surrounded by the transparent conductive layer, and at a lower region of the first pad electrode, a portion of the first pad electrode is filling a first opening of the transparent conductive layer and the CB layer.