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. 12, 2011
Filed:
Sep. 24, 2008
Shingo Kameyama, Osaka, JP;
Yasuhiko Nomura, Osaka, JP;
Ryoji Hiroyama, Kyoto, JP;
Masayuki Hata, Osaka, JP;
Shingo Kameyama, Osaka, JP;
Yasuhiko Nomura, Osaka, JP;
Ryoji Hiroyama, Kyoto, JP;
Masayuki Hata, Osaka, JP;
Sanyo Electric Co., Ltd., Moriguchi-shi, JP;
Abstract
One facet of a nitride based semiconductor laser device is composed of a cleavage plane of (0001), and the other facet thereof is composed of a cleavage plane of (000). Thus, the one facet and the other facet are respectively a Ga polar plane and an N polar plane. A portion of the one facet and a portion of the other facet, which are positioned in an optical waveguide, constitute a pair of cavity facets. A first protective film including nitrogen as a constituent element is formed on the one facet. A second protective film including oxygen as a constituent element is formed on the other facet.