Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Jeng Ping Lu0
Christopher L Chua0
Clifford F Knollenberg0
David P Bour0
Date of Patent
July 6, 2010
0Patent Application Number
123374910
Date Filed
December 17, 2008
0Patent Primary Examiner
Patent 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.
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