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:
Oct. 03, 2006
Filed:
Dec. 10, 2002
Takashi Kimura, Kyoto, JP;
Hisayoshi Kitajima, Kyoto, JP;
Takashi Kimura, Kyoto, JP;
Hisayoshi Kitajima, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A semiconductor laser device having a lower cladding layer, an active layer and an upper first cladding layer stacked on a compound semiconductor substrate in this order, a ridge-shaped upper second cladding layer provided on the upper first cladding layer, a current blocking layer provided on both sides of the upper second cladding layer, and a contact layer provided on the upper second cladding layer. A current interrupting layer or layers formed of an insulating material are provided between the upper second cladding layer and the contact layer, in the vicinity of at least one of a laser emission end face and a reflective end face, which are both end faces of the device in the longitudinal direction of the upper second cladding layer.