Patent ID: 8038919

Claim:
A method of manufacturing a film antenna for a mobile communications terminal case, said method comprising: preparing a carrier film formed of an insulation polymer material; attaching a masking tape, with a desired radiator pattern cut out, onto the at least one side of the carrier film to expose a portion of the carrier film on said at least one side; placing the carrier film with the masking tape attached thereon inside a vacuum chamber; forming a hydrophilic functional group on the exposed portion of the carrier film by simultaneously (i) emitting an ion beam directly to the exposed portion of the carrier film placed in the vacuum chamber and (ii) injecting gas around the carrier film inside said vacuum chamber; sputtering a metal, for forming an antenna radiator made of said metal on the exposed portion of the carrier film with the hydrophilic functional group formed thereon; removing the masking tape from the carrier film with the antenna radiator formed thereon: inserting the carrier film with the antenna radiator formed thereon into a mold having a shape of a mobile communication terminal case; and molding a mobile communication terminal case integrally with the carrier film and the antenna radiator formed thereon by injecting a molding material into the mold; wherein organic substances causing deterioration of electric conductivity of the antenna radiator are excluded from the antenna radiator; wherein the attaching comprises attaching the masking tape on each of both sides of the carrier film and the sputtering comprises simultaneously sputtering both sides of the film.