| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a laser marking method and a conductive-portion forming method whereby black marking is made possible independently of the kind of a resin composition. <P>SOLUTION: The laser marking method for performing black marking on the surface of a molded product includes a step wherein a resin film 6 having the property of so generating heat by a laser projection 4 on it as to alter it is mounted on the partial or whole surface 1 of the molded product made of a thermoplastic or thermosetting resin composition, a step for further providing the film in the form of interposing the film between a covering material 3 and the molded product by mounting the covering material 3 on the film, a step for further subjecting the resin film to heat generation and alteration by so transmitting the laser beam through the covering material as to project the laser beam on the resin film, a step for so fusing a generated alteration portion 2 and so sticking it on the surface of the molded product as to move it to the side of the molded product, and a step for removing thereafter the covering material and the unaltered portion of the resin film therefrom. <P>COPYRIGHT: (C)2003,JPO |
