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:
Jun. 12, 2012
Filed:
Dec. 07, 2006
Mitsuhiko Sakai, Kyoto, JP;
Mitsuhiko Sakai, Kyoto, JP;
Rohm Co., Ltd., Kyoto-fu, JP;
Abstract
To provide a semiconductor light emitting device with a light extraction efficiency increased and a method for manufacturing the semiconductor light emitting device. A semiconductor light emitting deviceincludes a supporting substrateand a semiconductor stackincluding an MQW active layeremitting light and an n-GaN layerat the top. In the upper surface of the n-GaN layerof the semiconductor attack, a plurality of conical protrusionsare formed. The protrusionsare formed so that an average Wof widths W of bottom surfaces of protrusionssatisfies: W>=λ/n, where λ is wavelength of light emitted from the active layer and n is a refractive index of the n-GaN layer
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile