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:
Jul. 19, 2005
Filed:
May. 17, 2002
Applicant:
Heng Liu, Arcadia, CA (US);
Inventor:
Heng Liu, Arcadia, CA (US);
Assignee:
Lumei Optoelectronics, Inc., El Monte, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H01L033/00 ;
U.S. Cl.
CPC ...
Abstract
A light-emitting diode is based on an undoped intrinsic SiC substrate on which are grown: an insulating buffer or nucleation structure; a light-emitting structure; window layers; a semi-transparent conductive layer; a bond pad adhesion layer; a p-type electrode bond pad; and an n-type electrode bond pad. In one embodiment, the light-emitting surface of the substrate is roughened to maximize light emission.