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:
Apr. 25, 2006
Filed:
Oct. 07, 2003
Hiroshi Chikugawa, Kashihara, JP;
Hiroshi Chikugawa, Kashihara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
In a semiconductor laser device, a flange () of a cap () is provided with straight-line cut-off portions () that are the same in number as notches () of a stem (). With the cut-off portions () positioned so as not to overlap the notches () of the stem () in position, welding between the cap () and the stem () is performed. The cut-off portions () of the cap () secure obtainment of a reference planewith a large area in a place where the notches () of the stem () are absent. As a result, sufficient precision in optical characteristics can be secured while suppressing an influence of unevenness of the stem () having a small diameter on a deviation angle θ of an optical axis from a normal line to a reference plane of an optical pickup.