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. 06, 2010
Filed:
Dec. 17, 2008
Clifford F Knollenberg, Fremont, CA (US);
David P Bour, Cupertino, CA (US);
Christopher L Chua, San Jose, CA (US);
Jeng Ping LU, Fremont, CA (US);
Clifford F Knollenberg, Fremont, CA (US);
David P Bour, Cupertino, CA (US);
Christopher L Chua, San Jose, CA (US);
Jeng Ping Lu, Fremont, CA (US);
Palo Alto Research Center Incorporated, Palo Alto, CA (US);
Abstract
An improved method of forming a LED with a roughened surface is described. Traditional methods of roughening a LED surface utilizes strong etchants that require sealing or protecting exposed areas of the LED. The described method uses a focused laser to separate the LED from the substrate, and a second laser to roughen the LED surface thereby avoiding the use of strong etchants. A mild etchant may be used on the laser roughened LED surface to remove unwanted metals.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile