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. 18, 2006
Filed:
Jul. 11, 2003
Haruki Fukai, Komoro, JP;
Hidetaka Karita, Miyota, JP;
Atsushi Nakamura, Komoro, JP;
Shigeo Yamashita, Machida, JP;
Haruki Fukai, Komoro, JP;
Hidetaka Karita, Miyota, JP;
Atsushi Nakamura, Komoro, JP;
Shigeo Yamashita, Machida, JP;
Hitachi, Ltd., Tokyo, JP;
Renesas Eastern Japan Semiconductor, Inc., Tokyo, JP;
Abstract
A semiconductor laser element capable of reducing the contact resistance and the thermal resistance and realizing a high reliability is provided. The semiconductor laser element includes: a semiconductor substrate, an active layer formed on the semiconductor substrate, a ridge having a clad layer formed on the active layer and a contact layer formed on the clad layer, an insulation film covering the side surfaces of the clad layer, and an electrode connected to the contact layer, wherein the insulation layer has an end portion in the ridge thickness direction located between the upper surface and the lower surface of the contact layer.