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:
Dec. 07, 2010
Filed:
Mar. 28, 2008
Hung Shen Chu, Shatin, CN;
Yong Cai, Shatin, CN;
Hung Shen Chu, Shatin, CN;
Yong Cai, Shatin, CN;
Hong Kong Applied Science and Technology Research Institute, Hong Kong, Hong Kong, CN;
Abstract
A vertical gallium-nitrate-based LED and method of making a vertical gallium-nitrate-based LED using a stop layer is provided. Embodiments of the present invention use mechanical thinning and a plurality of superhard stop points to remove epitaxial layers with a high level of certainty. According one embodiment, the method of making a vertical LED includes forming a plurality of layers on a sapphire substrate, forming a plurality of stop points in the plurality of layers, removing the sapphire substrate and part of a u-GaN layer using mechanical thinning, wherein the mechanical thinning stops at an end of the plurality of stop points, selectively etching the u-GaN layer and exposing at least a part of the highly doped stop layer, and forming an n-electrode on the highly doped stop layer.