| abstract |
Provided is a laser processing method capable of sufficiently reducing the generation of dross while preventing contamination of a workpiece surface due to debris and easily removing a film formed on the surface of the workpiece. A process of forming a coating film 2 on a surface to be processed of a workpiece 1, a process of irradiating the workpiece 1 with a laser beam through the coating film 2, processing the workpiece 1, and irradiation of the laser beam A laser processing method including a step of removing the film 2 later, wherein the film 2 comprises a vinyl polymer (A) having a monomer unit in which an alkali-soluble group is blocked with an alkyl vinyl ether, and nigrosine (B And a laser processing method characterized by comprising: [Selection] Figure 1 |