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. 11, 2014
Filed:
Sep. 02, 2010
Rei Hashimoto, Tokyo, JP;
Maki Sugai, Tokyo, JP;
Jongil Hwang, Kanagawa, JP;
Yasushi Hattori, Kanagawa, JP;
Shinji Saito, Kanagawa, JP;
Masaki Tohyama, Kanagawa, JP;
Shinya Nunoue, Chiba, JP;
Rei Hashimoto, Tokyo, JP;
Maki Sugai, Tokyo, JP;
Jongil Hwang, Kanagawa, JP;
Yasushi Hattori, Kanagawa, JP;
Shinji Saito, Kanagawa, JP;
Masaki Tohyama, Kanagawa, JP;
Shinya Nunoue, Chiba, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
According to one embodiment, a semiconductor laser device with high reliability and excellent heat dissipation is provided. The semiconductor laser device includes an active layer, a p-type semiconductor layer on the active layer, a pair of grooves formed by etching into the p-type semiconductor layer, a stripe sandwiched by the pair of grooves and having shape of ridge, and a pair of buried layers made of insulator to bury the grooves. The bottom surfaces of the grooves are shallower with an increase in distance from the stripe.