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:
Jun. 20, 1995
Filed:
Feb. 23, 1994
Nobuaki Kaneno, Itami, JP;
Hirotaka Kizuki, Itami, JP;
Norio Hayafuji, Itami, JP;
Tetsuo Shiba, Itami, JP;
Hitoshi Tada, Itami, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A semiconductor laser device including a semiconductor substrate; a plurality of semiconductor layers including an AlGaAs layer epitaxially grown on said semiconductor substrate; a ridge having a reverse mesa shape and opposed sides formed of said plurality of semiconductor layers; an Al.sub.x Ga.sub.1-x As low temperature buffer layer (0.ltoreq..times..ltoreq.1) disposed on said AlGaAs layer at opposite sides of said ridge; a first semiconductor layer epitaxially disposed on said low temperature buffer layer at opposite sides of said ridge; and a second semiconductor layer epitaxially disposed on said ridge and said first semiconductor layer.