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:
Apr. 21, 2026
Filed:
Sep. 30, 2021
Sumitomo Osaka Cement Co., Ltd., Tokyo, JP;
Yumi Murata, Tokyo, JP;
Yuki Kugimoto, Tokyo, JP;
SUMITOMO OSAKA CEMENT CO., LTD., Tokyo, JP;
Abstract
An optical waveguide device in which an optical loss is reduced by removing an air bubble inside an adhesive layer for joining a reinforcing member from near an optical waveguide or the like even in a case where a protruding part such as a rib type optical waveguide or a spot size converter is formed on an optical waveguide substrate is provided. An optical waveguide device includes an optical waveguide substrate () provided with an optical waveguide (), and a reinforcing member () disposed on an upper side of the optical waveguide () near an end portion of the optical waveguide (), the optical waveguide substrate () and the reinforcing member () being joined through an adhesive layer (), in which a protective layer () that covers the optical waveguide () is provided on the optical waveguide () positioned on a lower side of the reinforcing member (), and the adhesive layer () is disposed outside the protective layer ().