| 摘要 |
PROBLEM TO BE SOLVED: To provide a built-in antenna for mobile phones, which can easily be mass-produced, realize a desired shape of a curved face and attain high reliability in the electric connection to a printed circuit board. SOLUTION: The built-in antenna for mobile phones is characterized in that resin onto which metallic plating is hardly formed (hardly platable resin) and resin onto which metallic plating is easily formed (easily platable resin) are injection molded in two stages to obtain a composite mold, the composite mold has a radiation element part formed by the easily platable resin and a contact part that electrically interconnects the radiation element part and other conductive members in the mobile phone, and a conductive metallic layer is formed on the surface of the radiation element part and the contact part by electroless plating.
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