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. 26, 2013
Filed:
Jul. 21, 2011
Chie Fukuda, Yokohama, JP;
Chie Fukuda, Yokohama, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A semiconductor optical modulation device includes a substrate; a first semiconductor cladding layer of a first conductivity type disposed on the substrate; an optical waveguide layer disposed on the first semiconductor cladding layer, the optical waveguide layer including a first semiconductor optical confinement layer, a second semiconductor optical confinement layer, and an insulating layer disposed between the first semiconductor optical confinement layer and the second semiconductor optical confinement layer, the insulating layer being made of aluminum oxide; a second semiconductor cladding layer of a second conductivity type disposed on the optical waveguide layer; a first electrode electrically connected to the first semiconductor cladding layer; and a second electrode electrically connected to the second semiconductor cladding layer.