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. 24, 2001
Filed:
Jul. 27, 2000
Toyoji Chino, Toyonaka, JP;
Yasuhito Kumabuchi, Toyonaka, JP;
Isao Kidoguchi, Kawanishi, JP;
Hideto Adachi, Ibaraki, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A semiconductor laser device, including a substrate; a ridge stripe formed on the substrate and including an active layer, an n-cladding layer and p-cladding layer, the n-cladding layer and the p-cladding layer interposing the active layer; in which the ridge stripe has a laser unit which lases. In one embodiment the ridge stripe has a tip portion having a tapered shape, and an angle formed inside the ridge stripe by a bottom surface of the ridge stripe and a side surface of the ridge stripe is in the range of about 60° and about 90°. In one embodiment, the laser device includes a misoriented substrate and the ridge stripe has current blocking layers formed on both sides thereof.