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:
May. 02, 2006
Filed:
Apr. 29, 2003
Kazunori Mune, Ibaraki, JP;
Amane Mochizuki, Ibaraki, JP;
Shunichi Hayashi, Ibaraki, JP;
Hirofumi Fujii, Ibaraki, JP;
Takahiro Fukuoka, Ibaraki, JP;
Ryusuke Naitou, Ibaraki, JP;
Kazunori Mune, Ibaraki, JP;
Amane Mochizuki, Ibaraki, JP;
Shunichi Hayashi, Ibaraki, JP;
Hirofumi Fujii, Ibaraki, JP;
Takahiro Fukuoka, Ibaraki, JP;
Ryusuke Naitou, Ibaraki, JP;
Nitto Denko Corporation, Osaka, JP;
Abstract
A photosensitive polyimide resin precursor composition capable of providing a polyimide resin that is not substantially colored, is transparent and has heat resistance, an optical polyimide resin obtained from the composition, and an optical waveguide using the polyimide resin. The photosensitive polyimide resin precursor composition contains (a) 100 parts by weight of a polyamic acid obtained from a tetracarboxylic acid dianhydride and a diamine, (b) 0.01 parts by weight or more and less than 5 parts by weight of a 1,4-dihydropyridine derivative, (c) 5–50 parts by weight of a glycol (ether). The optical polyimide resin is obtained by irradiating the photosensitive resin precursor composition with UV light, followed by exposure, heating, development, and then heating. The optical waveguide comprises a core layer comprising the optical polyimide resin, and a cladding layer thereof.