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:
Sep. 28, 2004
Filed:
Jan. 02, 2003
Applicant:
Inventor:
Tzer-Perng Chen, Hsinchu, TW;
Assignee:
United Epitaxy Co., Ltd., Hsinchu, TW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 3/300 ;
U.S. Cl.
CPC ...
H01L 3/300 ;
Abstract
A light emitting diode with high efficient reflective metal layer is disclosed. To prevent the reflective metal layer from reacting with the epi-LED layer structure during a thermal annealing process, a transparent electrical-conductive oxide layer such as ITO is formed in between them. Four preferred embodiments are proposed to improve the ohmic contact between the ITO layer and the epi-LED layers. There are: forming ohmic contact grid pattern, or ohmic contact channels in the ITO layer, or thin GaAs layer, or thin transparent metal layer at the interface between the ITO and the epi-LED layers.