Patent ID: 6709720
Filing Date: 2004-03-23
Classification: B23K,B41M,C23C

Abstract:
A method for marking materials using a marking material and a material to be marked consisting of a light transparent body or a laser transmittive body, comprising:a first process of placing a surface of said material to be marked and a surface of said marking material together with a desired gap therebetween, vaporizing said marking material by irradiating through said material to be marked with a first laser beam while scanning with the first laser beam, and forming a film vaporized from said marking material onto a predetermined area of said material to be marked; and a second process of removing a part of said film formed onto the surface of said material to be marked by irradiating the part of the film with a second laser beam while scanning with the second laser beam; wherein patterns of characters, diagrams or symbols are formed in the film on said material to be marked by the second process; and wherein said desired gap is between 2 &mgr;m and 200 &mgr;m.