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:
Oct. 21, 2014
Filed:
Jan. 08, 2013
Sony Corporation, Tokyo, JP;
Hiroyasu Matsugai, Kanagawa, JP;
Kei Satou, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
A semiconductor laser includes: a semiconductor layer including an active layer and a ridge portion, the ridge portion facing a current injection region of the active layer; and an embedded film covering a side surface of the ridge portion and a top surface of the semiconductor layer, wherein the embedded film includes a first layer configured of a silicon oxide film, a second layer made of a silicon compound having a refractive index lower than that of the active layer and having a silicon content higher than a stoichiometric ratio, and a third layer made of an inorganic insulating material in this order of closeness to the ridge portion and the semiconductor layer.