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:
Feb. 17, 2004
Filed:
Oct. 30, 2001
Katsuhiro Kaneko, Kyoto, JP;
Shigeo Tanahashi, Kyoto, JP;
Tokuichi Yamaji, Kyoto, JP;
Shinichi Abe, Kyoto, JP;
Yuriko Ueno, Kyoto, JP;
Kyocera Corporation, Kyoto, JP;
Abstract
An object of the invention is to provide an optical integrated circuit substrate capable of establishing optical connection between an optical waveguide and a semiconductor light-receiving element with high light-receiving efficiency and of achieving low-loss light transmission. In the optical integrated circuit substrate, on a substrate is formed an optical waveguide having a clad and a core layer. Embedded in the optical waveguide are a metal placement portion for an optical element and a thin-film optical element placed thereon. Distance between the thin-film optical element and the core layer is reduced. In a region free of the thin-film optical element, there is an adequate distance between the core layer and the substrate. This allows satisfactory optical connection between the thin-film optical element and the optical waveguide. In the thin-film optical element-free region, low-loss light transmission is achieved without interaction between transmitted light and the substrate.