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:
Aug. 18, 2020
Filed:
Apr. 20, 2018
Applicant:
Ngk Insulators, Ltd., Nagoya, Aichi-prefecture, JP;
Inventors:
Keiichiro Asai, Nagoya, JP;
Shoichiro Yamaguchi, Ichinomiya, JP;
Assignee:
NGK INSULATORS, LTD., Nagoya, Aichi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 6/136 (2006.01); G02B 6/132 (2006.01); G02B 6/122 (2006.01); G02B 6/12 (2006.01);
U.S. Cl.
CPC ...
G02B 6/136 (2013.01); G02B 6/122 (2013.01); G02B 6/132 (2013.01); G02B 2006/12097 (2013.01);
Abstract
An optical waveguide substrateincludes an optical waveguidecomposed of a multi-layered filmof a plurality of optical material filmsand having end faces onto which a light is made incident or from which the light is emitted. The end face is an etched surface, and it is provided, on the end face, an unevennesscorresponding to a difference of etching rates of the optical material films.