BUILT-IN ANTENNA FOR PORTABLE TELEPHONE

摘要

PROBLEM TO BE SOLVED: To provide a built-in antenna for a portable telephone, which is mass- produced with ease and where a wanted curved shape is realized while a conductive metal layer is prevented from discoloring. SOLUTION: A resin on which a metal is hard to be plated (hard-to-be-plated resin) and a resin on which a metal is easily plated (easy-to-be-plated resin) are molded in 2-step injection molding to provide a composite mold where at least a part of a mold of easy-to-be-plated resin is exposed on the surface. A conductive metal layer is formed on the surface of the mold of the easy-to-be- plated resin of the composite mold by electroless-plating. At least the easy-to-be- plated resin contains a glass fiber 0-20 wt.%.