Radiation-curable composition, optical waveguide and method...

Details Radiation-curable composition, optical waveguide and method... Radiation-curable composition, optical waveguide and method...

2007-01-09

2007-01-09

Pak, Sung (Department: 2874)

Optical waveguides

Planar optical waveguide

C430S270100

Reexamination Certificate

active

10513355

ABSTRACT:
A radiation-curable composition containing (A) hydrolyzates of hydrolyzable silane compounds represented by general formula (1): (R1)p(R2)qSi(X)4-p-q(wherein R1is a non-hydrolyzable organic group having 1 to 12 carbon atoms that contains fluorine atoms, R2is a non-hydrolyzable organic group having 1 to 12 carbon atoms (but excluding ones that contain fluorine atoms), X is a hydrolyzable group, p is an integer of 1 or 2, and q is an integer of 0 or 1) and condensates of such hydrolyzates, and (B) a photo acid generator, wherein the ratio of silanol (Si—OH) groups in the composition is 0.1 to 0.5 out of all the bonding groups on Si. With such a composition, the waveguide loss is low for light having a wavelength in a broad range from the visible region to the near infrared region, and moreover the cracking resistance, the patterning ability upon irradiation with radiation, and so on are excellent.

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