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:
Feb. 22, 2011
Filed:
Dec. 31, 2008
Yasuyuki Nakagawa, Tokyo, JP;
Yasuyuki Nakagawa, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
The invention provides an end-face-processing jig that allows the formation of a reflectance control film on an end face of a semiconductor laser body while preventing possible degradation due to catastrophic optical damage (COD) of a semiconductor laser, and a method of manufacturing a semiconductor laser employing such an end-face-processing jig. A window part of the end-face-processing jig is made of at least one of an oxide and a nitride, and semiconductor laser bars are fixed by the end-face-processing jig so that their end faces are exposed through a window of the window part. In this condition, a reflectance control film is formed on the end faces of the semiconductor laser bars for the manufacture of a semiconductor laser. This prevents a metal from being taken in the reflectance control film, thus preventing the absorption of light caused by a metal taken in the reflectance control film. It is thus possible to form a reflectance control film on the end faces of semiconductor laser bars while preventing possible degradation due to COD of a semiconductor laser.