Patent ID: 7376328

Claim:
A photosensitive resin composition for optical waveguide formation, comprising: (A) a di(meth)acrylate having the structure represented by the following general formula (1): (wherein R 1 is —(OCH 2 CH 2 ) m —, —OCH(CH 3 )CH 2 ) m —, or —OCH 2 CH(OH)CH 2 —; X is —C(CH 3 ) 2 —, —CH 2 —, —O—, or —SO 2 —; Y is a hydrogen atom or a halogen atom; m is an integer of 0 to 4; (B) a mono(meth)acrylate having the structure represented by the following formula (2): (wherein R 2 is —OCH 2 CH 2 ) p —, —OCH(CH 3 )CH 2 ) p —, or —OCH 2 CH(OH)CH 2 —; Y is a hydrogen atom, a halogen atom, Ph-C(CH 3 ) 2 —, Ph-, or an alkyl group having 1 to 20 carbon atoms; p is an integer of 0 to 4; Ph is a phenyl group; (C) a photoradical polymerization initiator; and tris(2-acryloyloxyethyl)isocyanurate, wherein the weight ratio (A/B) of said component (A) to said component (B) is 0.3 to 5.0.