| abstract |
[PROBLEMS] To provide an optical waveguide resin composition and an optical waveguide forming resin film capable of forming an optical waveguide excellent in transparency, reflow heat resistance, thermal shock resistance, environmental reliability, and stability during bonding with good productivity and workability. To provide. Also provided are an optical waveguide forming resin and an optical waveguide forming film excellent in storage stability and alkali developability. An optical waveguide forming resin composition comprising (A) a polymer having a carboxyl group, (B) a compound having an ethylenically unsaturated group, (C) a polyfunctional block isocyanate compound, and (D) a radical polymerization initiator. , A resin film for forming an optical waveguide using the resin composition for forming an optical waveguide, and an optical waveguide using these. [Selection figure] None |