The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 01, 2011
Filed:
Jul. 02, 2008
Jin-ywan Lin, Hsinchu, TW;
Tzer-perng Chen, Hsinchu, TW;
Pai-hsiang Wang, Hsinchu, TW;
Chih-chiang LU, Hsinchu, TW;
Jin-Ywan Lin, Hsinchu, TW;
Tzer-Perng Chen, Hsinchu, TW;
Pai-Hsiang Wang, Hsinchu, TW;
Chih-Chiang Lu, Hsinchu, TW;
Epistar Corporation, Hsinchu, TW;
Abstract
A light-emitting device comprises a channel structure in the semiconductor layer for connecting an electrode and an ohmic contact layer by means of a substrate transfer process including a wafer-bonding process and a substrate-lifting-off process. The channel structure is formed in the semiconductor stack for electrically connecting the ohmic contact layer and the electrode and driving the current into the light-emitting device. Thereby, a horizontal type or a vertical type of light-emitting device has a good ohmic contact and high light efficiency.