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. 14, 2009
Filed:
Mar. 11, 2004
Keiichi Kuramoto, Kadoma, JP;
Hiroaki Izu, Hirakata, JP;
Mitsuaki Matsumoto, Osaka, JP;
Youhei Nakagawa, Hirakata, JP;
Hitoshi Hirano, Nishinomiya, JP;
Nobuhiko Hayashi, Osaka, JP;
Keiichi Kuramoto, Kadoma, JP;
Hiroaki Izu, Hirakata, JP;
Mitsuaki Matsumoto, Osaka, JP;
Youhei Nakagawa, Hirakata, JP;
Hitoshi Hirano, Nishinomiya, JP;
Nobuhiko Hayashi, Osaka, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
In the optical waveguide which comprises a core layer to be an optical transmission region and an upper clad layer and a lower clad layer covering the surrounding of the core layer and of which the upper clad layer is formed while being shrunk in the volume, a stress moderating layer formed a material with a smaller storage modulus than that of the upper clad layer is formed between the upper clad layer and the lower clad layer in at least a portion of a region where the upper clad layer and the lower clad layer are brought into contact with each other.