BODY FORMED WITH THROUGH-HOLE AND LASER BEAM MACHINING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a laser beam machining method having simple constitution by which a tapered shape can be suppressed, and neither burrs nor adhesion of scattering occurs, and to provide a body formed with a through-hole.

SOLUTION: The laser beam machining method is provided for machining the through-hole on a workpiece 1 by using a pulse laser beam and the method is provided with: a step where an attachable and detachable sacrificial layer 1a is provided on the workpiece 1; a step where the through-hole is machined on the workpiece by the laser beam in such a state that the sacrificial layer 1a is provided; and a step where the sacrificial layer is removed from the workpiece after the through-hole machining step.

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