Patent ID: 7957622

Claim:
A method of manufacturing an opto-electric hybrid board, comprising the steps of: forming a plurality of protruding cores in a predetermined pattern on an under cladding layer; forming a thin metal film overside and top surfaces of the protruding cores and a surface portion of the under cladding layer except where the protruding cores are formed; electroplating the thin metal film to fill grooves defined between adjacent ones of the protruding cores covered with the thin metal film with a plated layer and to cover the top surface of the protruding cores covered with the thin metal film with the plated layer; removing portions of the thin metal film formed on the top surface of the protruding cores and the plated layer formed thereon by polishing to cause portions of the plated layer remaining in the grooves to serve as electrical interconnect lines; and forming an over cladding layer so as to cover the protruding cores and the electrical interconnect lines.