LASER BEAM MACHINING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a laser beam machining method allowing cutting of a machining object without any fusion or a crack deviated from the planned cutting line on its surface. SOLUTION: The laser beam machining method is characterized by that it comprises a process of fixing a machining object 1 to a cohesive surface of a sheet (film), a process of radiating laser beam L into the machining object 1 by focusing a focal point P inside it to form a cutting planned line by using a modified area within the machining object 1 along the cutting planned line 5 of the machining object 1, and a process of cutting the machining object 1 along the planned line cutting line as it is still fixed to the sheet.