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:
Jul. 08, 2014
Filed:
Dec. 01, 2009
Makoto Fujiwara, Utsunomiya, JP;
Kenji Miyao, Yokohama, JP;
Yoji Shirato, Yaizu, JP;
Koji Choki, Kawasaki, JP;
Mutsuhiro Matsuyama, Brecksville, OH (US);
Makoto Fujiwara, Utsunomiya, JP;
Kenji Miyao, Yokohama, JP;
Yoji Shirato, Yaizu, JP;
Koji Choki, Kawasaki, JP;
Mutsuhiro Matsuyama, Brecksville, OH (US);
Sumitomo Bakelite Company Limited, Tokyo, JP;
Abstract
An optical waveguide includes a clad layer, a core layer and a clad layer which are laminated together in this order from a lower side thereof. Within the core layer, a core portion and a side clad portion provided adjacent to the core portion so as to surround side surfaces of the core portion are formed. Further, a part of the side clad portion prevents a left side end of the core portion from being exposed outside. A mirror formation region is constituted from a region consisting of such a part of the side clad portion and a part of each of the clad layers located thereabove and therebelow. This mirror formation region is subjected to digging processing so that a concave portion is formed. An inner surface of this concave portion serves as the mirror. From the mirror, a material other than a material constituting the core portion, that is, a material constituting each of the clad layers and a material constituting the side clad portion are exposed.