RADIATION CURABLE COMPOSITION, OPTICAL WAVEGUIDE AND METHOD FOR FORMATION THEREOF

摘要

A radiation curable composition which comprises (A) a hydrolyzate of a hydrolyzable silane compound represented by the general formula (1): (R<1>)p(R<2>)qSi(X)4-p-q wherein R<1 >is a non-hydrolyzable organic group having 1 to 12 carbon atoms and containing a fluorine atom, R<2 >is a non-hydrolyzable organic group having 1 to 12 carbon atoms (except the one containing a fluorine atom), X is a hydrolyzable group, p is an integer of 1 or 2, and q is an integer of 0 or 1, or a condensate thereof, and (B) an agent generating an acid by the irradiation with a light, and contains a silanol (Si-OH) group in an amount of 0.1 to 0.5 relative to the total amount of bonding groups on the Si's therein. The composition allows the formation of an optical wave guide which is reduced in a waveguide loss with respect to lights having wave lengths of a wide range from a visible region to a near infrared region, and also is excellent in the resistance to cracking, characteristics of patterning by irradiation with a radiation, and the like.