US Patent 7569168 Method of producing polymer optical waveguide

A method of producing a polymer optical waveguide, the method including preparing a core-forming mold having a concave portion corresponding to at least one optical waveguide core, bringing a concave side of the core-forming mold into close contact with a flat substrate, filling a core-forming curable resin into the concave portion by suction and/or by utilizing a capillary phenomenon, curing the core-forming curable resin to form an optical waveguide core, and removing the optical waveguide core from the core-forming mold and the flat substrate.