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. 08, 2026
Filed:
Sep. 30, 2022
Sumitomo Osaka Cement Co., Ltd., Tokyo, JP;
Shotaro Hirata, Tokyo, JP;
Kosuke Okahashi, Tokyo, JP;
Yu Kataoka, Tokyo, JP;
Yumi Murata, Tokyo, JP;
SUMITOMO OSAKA CEMENT CO., LTD., Tokyo, JP;
Abstract
In an optical waveguide device, absorption of light by a control electrode is suppressed and peeling of a dielectric layer is prevented. An optical waveguide device of the present invention includes a substrate on which a rib type optical waveguide is formed, and a control electrode disposed next to the optical waveguide, in which an end portion of the control electrode facing to the optical waveguide is positioned in a first recess portion of the substrate, a dielectric layer that covers the optical waveguide is provided, a second recess portion that is further recessed from a shallowest position of the first recess portion is provided in a part of the first recess portion at a base part of the optical waveguide, and the dielectric layer is disposed in the second recess portion.