| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a laser marking processing method using a surface protection film capable of realizing excellent finish on a surface of a workpiece, and manifesting and maintaining an excellent surface protection function during laser marking processing. <P>SOLUTION: In the laser marking processing method using the polypropylene type surface protection film, when executing laser beam marking to a workpiece, the polypropylene type surface protection film is affixed to a laser beam irradiation surface side of the workpiece in advance as a surface protective film. The wavelength of laser beam of a laser beam marker apparatus to be used for the laser beam marking is set to be a wavelength λ to be selected from 355-10,640 nm. Full-beam transmittance (λ) in the laser beam wavelength λ of the surface protection film is ≥50%. <P>COPYRIGHT: (C)2012,JPO&INPIT |
