Optical waveguide forming resin composition, optical waveguide and light transmission flexible printed board produced by using the resin composition, and production method for the optical waveguide

摘要

There are provided an optical waveguide forming resin composition, an optical waveguide and a light transmission flexible printed board both produced by using the composition, and a production method for the optical waveguide, wherein the resin composition is superior in coatability, capable of omitting a solvent drying step in coating film formation, and suitable as a material for forming an optical waveguide which allows only a low waveguide loss and which has a higher Tg and higher flexibility. An optical waveguide forming resin composition comprises the following components (A) through (D), wherein the optical waveguide forming resin composition is free from a solid resin component and the viscosity thereof under a 25°C environment is within the range of 10 to 20 mPa·s:
(A) a liquid oxetane compound;
(B) a liquid epoxy compound;
(C) an alkylene glycol; and
(D) a photoacid generator.