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, 2009
Filed:
Feb. 17, 2005
Youhei Nakagawa, Hirakata, JP;
Nobuhiko Hayashi, Osaka, JP;
Keiichi Kuramoto, Kadoma, JP;
Mitsuaki Matsumoto, Hirakata, JP;
Hitoshi Hirano, Nishinomiya, JP;
Youhei Nakagawa, Hirakata, JP;
Nobuhiko Hayashi, Osaka, JP;
Keiichi Kuramoto, Kadoma, JP;
Mitsuaki Matsumoto, Hirakata, JP;
Hitoshi Hirano, Nishinomiya, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
Disclosed herein is an optical waveguide comprising a core layer to be an optical waveguide region, an upper clad layer covering the core layer and a lower clad layer, characterized in that an ultraviolet control region for preventing ultraviolet light from entering is provided at any one location of under the lower clad layer, on an interface of the lower clad layer and the upper clad layer, and on the upper clad layer. And a method of fabricating this optical waveguide is also disclosed.