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:
May. 26, 2009
Filed:
Mar. 30, 2007
Shuichi Hirukawa, Kyoto, JP;
Katsuhiko Kishimoto, Nara, JP;
Shuichi Hirukawa, Kyoto, JP;
Katsuhiko Kishimoto, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
Provided are a semiconductor laser device capable of stable operation at the time of high power output without damage to a resonator end surface and a method of manufacturing the same, as well as an optical transmission module and an optical disk apparatus using the semiconductor laser device. A method of manufacturing a semiconductor laser device includes a laser wafer formation step of forming a laser wafer at least having a semiconductor layer to form a resonator end surface, a cleavage step of cleaving the laser wafer in the atmosphere and forming a semiconductor laser element having the resonator end surface, a contact step of brining the resonator end surface in contact with a nitrogen containing gas containing 90-100 volume % nitrogen for one hour or longer, and a reflectance control film formation step of forming a reflectance control film in contact with the resonator end surface.