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. 29, 2008
Filed:
Mar. 26, 2004
Kentarou Tamaki, Tokyo, JP;
Hideaki Takase, Tokyo, JP;
Yuuichi Eriyama, Tokyo, JP;
Shinji Ohba, Hadano, JP;
Hideyuki Fujiwara, Hadano, JP;
Kentarou Tamaki, Tokyo, JP;
Hideaki Takase, Tokyo, JP;
Yuuichi Eriyama, Tokyo, JP;
Shinji Ohba, Hadano, JP;
Hideyuki Fujiwara, Hadano, JP;
JSR Corporation, Tokyo, JP;
Abstract
An optical waveguide chip including a core portion as an optical waveguide, a clad portion composed of a lower clad layer and an upper clad layer, and an optical fiber guide portion which is formed integrally with the clad portion for positioning a single-mode optical fiber which is to be connected with the core portion. Each portion of the optical waveguide chip is formed by creating a layer of a radiation-sensitive polysiloxane composition by photolithography. At least two kinds of radiation-sensitive polysiloxane compositions are used so that the core portion has a higher refractive index than the clad portion.