Optical waveguides – Having particular optical characteristic modifying chemical... – Of waveguide core
Reexamination Certificate
2006-08-01
2006-08-01
Healy, Brian (Department: 2883)
Optical waveguides
Having particular optical characteristic modifying chemical...
Of waveguide core
C385S141000, C385S142000, C385S144000, C385S145000, C385S129000, C385S130000, C385S132000, C430S269000, C430S330000, C065S385000, C065S386000
Reexamination Certificate
active
07085469
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.
REFERENCES:
patent: 5851736 (1998-12-01), Omote et al.
patent: 5858518 (1999-01-01), Omote et al.
patent: 6081632 (2000-06-01), Yoshimura et al.
patent: 6096482 (2000-08-01), Omote et al.
patent: 6100582 (2000-08-01), Omote et al.
patent: 6132930 (2000-10-01), Hayashi et al.
patent: 6177225 (2001-01-01), Weber et al.
patent: 6855478 (2005-02-01), DeVoe et al.
patent: 2001/0021293 (2001-09-01), Kouta et al.
patent: 1 205 804 (2002-05-01), None
patent: 6-337320 (1994-12-01), None
patent: 2002-14246 (2002-01-01), None
patent: WO-92/00185 (1992-01-01), None
patent: WO 92/00185 (1992-01-01), None
patent: WO 01/96915 (2001-12-01), None
Patent Abstracts of Japan (2003), Nitto Denko Corp., vol. 2003, No. 4.
European Search Report dated Jun. 1, 2004.
Hino Atsushi
Horiike Mika
Mochizuki Amane
Mune Kazunori
Naitou Ryuusuke
Healy Brian
Nitto Denko Corporation
Peng Charlie
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