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:
Aug. 01, 2006
Filed:
Nov. 05, 2003
Kazunori Mune, Osaka, JP;
Ryuusuke Naitou, Osaka, JP;
Amane Mochizuki, Osaka, JP;
Atsushi Hino, Osaka, JP;
Mika Horiike, Osaka, JP;
Kazunori Mune, Osaka, JP;
Ryuusuke Naitou, Osaka, JP;
Amane Mochizuki, Osaka, JP;
Atsushi Hino, Osaka, JP;
Mika Horiike, Osaka, JP;
Nitto Denko Corporation, Osaka, JP;
Abstract
This invention provides a process for producing a three-dimensional polyimide optical waveguide, which comprises: (I) irradiating a polyamic acid film with a laser beam while converging the laser beam at an inside portion of the film and relatively moving the light convergence point, the polyamic acid film containing: (a) a polyamic acid obtained from a tetracarboxylic dianhydride and a diamine; and (b) per 100 parts of the polyamic acid, from 0.5 part by weight to less than 10 parts by weight of a specific 1,4-dihydropyridine derivative represented by formula (I): and then, (II) heating the polyamic acid film to imidize the polyamic acid, thereby obtaining an optical waveguide having a continuous core region where the refraction index has been changed, in the thus formed polyimide film.