Patent ID: 9233433
Filing Date: 2016-01-12
CPC Classification: B23K,G01N

Claim Text:
1. A laser processing method of applying a pulsed laser beam to a workpiece having a plurality of members, thereby forming a laser processed groove on said workpiece, said laser processing method comprising: a processing conditions setting step of setting a plurality of processing conditions respectively corresponding to a plurality of different materials forming said plurality of members constituting said workpiece, wherein said processing conditions setting step includes storing, in a memory, a processing conditions map in which a plurality of said different materials are each mapped to both a repetition frequency of the pulsed laser and a power of the pulsed laser; a wavelength detecting step of detecting the wavelengths of plasma lights generated by applying said pulsed laser beam to said plurality of members constituting said workpiece; a processing condition selecting step of selecting, from said processing conditions map, any suitable one of said processing conditions corresponding to any one of said members corresponding to the wavelength of plasma lights detected by said wavelength detecting step; and a laser processing step of applying said pulsed laser beam to said workpiece under the processing condition selected by said processing condition selecting step, thereby forming said laser processed groove on said workpiece, wherein said plurality of different materials comprises four different materials, defined as a first material, a second material, a third material and a fourth material; and wherein said wavelength detecting step comprises: