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:
Sep. 18, 2012
Filed:
Sep. 25, 2009
Applicants:
Yuhki Kinpara, Chiyoda-ku, JP;
Satoshi Oikawa, Chiyoda-ku, JP;
Toru Sugamata, Chiyoda-ku, JP;
Inventors:
Assignee:
Sumitomo Osaka Cement Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/035 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical waveguide device includes: a substrate having an electro-optical effect; an optical waveguide formed on the substrate; and a control electrode for applying an electric field to the optical waveguide. The optical waveguide device has the following characteristics. A thickness of the substrate is 30 μm or less. The control electrode has a signal electrode and a ground electrode. A low-permittivity layer is formed at least on a surface portion of the signal electrode in contact with the substrate.