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:
Jan. 06, 2004
Filed:
Mar. 13, 2001
Toyoji Chino, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A semiconductor laser device includes a substrate, a light emission region provided on the substrate, and an alignment stripe provided on the substrate so as to be adjacent to the light emission region. The light emission region includes a first active layer stripe having a layered structure including a first waveguide layer, an active layer, and a second waveguide layer, a first buried layer formed so as to cover side faces of the active layer stripe, a second buried layer formed on the first buried layer, and a third buried layer formed on the second buried layer and the active layer stripe. The alignment stripe includes a second active layer stripe having a layered structure including the first waveguide layer, the active layer, and the second waveguide layer, and a selective growth mask formed on the second active layer stripe and formed of a material on which the first buried layer, the second buried layer and the third buried layer are incapable of growing.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile