Patent ID: 7847017

Claim:
A photosensitive resin composition for optical waveguide formation comprising at least: a polymer containing a repeating structural unit represented by the following general formula (1), and at least one of a repeating structural unit represented by the following general formula (2) and a structural unit represented by the following general formula (3); a photoacid generator; and an epoxy compound (except for a polymer containing a repeating structural unit represented by the general formula (1), a repeating structural unit represented by the general formula (2) and/or a repeating structural unit represented by the general formula (3)): wherein R 1 represents hydrogen atom or methyl group and R 2 represents an organic group having an epoxy structure which is selected from the group consisting of 5,6-epoxy-2-bicyclo[2,2,1]heptyl group, 5-epoxyethyl-2-bicyclo[2,2,1]heptyl group, 6-epoxyethyl-2-bicyclo[2,2,1]heptyl group, 5,6-epoxy-2-bicyclo[2,2,1]heptylmethyl group, 3,4-epoxytricyclo[5.2.1.0 2,6 ]decyl group, 3,4-epoxytricyclo[5.2.1.0 2,6 ]decyloxyethyl group, 3,4-epoxytetracyclo[4.4.0.1 2,5 .1 7,10 ]dodecyl group, and 3,4-epoxytetracyclo[4.4.0.1 2,5 .1 7,10 ]dodecylmethyl group; wherein R 3 represents hydrogen atom or methyl group and R 4 represents an organic group having a lactone structure; wherein R 5 represents hydrogen atom or methyl group and R 6 represents an organic group having an aromatic structure; wherein the repeating structural unit represented by the general formula (2) is selected from the group consisting of the following formulae: wherein the repeating structural unit represented by the general formula (3) is selected from the group consisting of the following formulae: