| 摘要 |
PURPOSE:To provide a mask for laser-marking having heat resistance and by which a stuck stain is easily wiped and a material to be marked is accurately marked. CONSTITUTION:A laser beam irradiating the mask M is shielded by a dielectric body multilayer film 2 formed on one surface of a base board 1. In the mask M, the laser beam is transmitted through a part of the base board 1 where the multilayer film is not formed, that is the part of pattern (a). The material to be marked is marked with a mark corresponding to the pattern (a) by the transmitted laser beam. The laser beam is efficiently utilized since a reflection preventing film 3 is coated on both of incident plane and light emitting surface for the laser beam. |
