Patent ID: 8779325

Claim:
A laser beam processing machine comprising a chuck table for holding a workpiece, a laser beam application means for applying pulse laser beams to the workpiece held on the chuck table, a processing-feed means for moving the chuck table and the laser beam application means relative to each other in a processing-feed direction (X direction), a X-direction position detection means for the chuck table, and a controller for controlling the laser beam application means and the processing-feed means based on a detection signal from the X-direction position detection means, wherein the laser beam application means comprises a laser beam oscillation means for providing the pulse beams, an optical axis changing means for deflecting the optical axis of the beams in the processing-feed direction, and a condenser for converging beams that have been deflected by the optical axis changing means; the controller comprises a memory for storing a plurality of processing position coordinates set in the workpiece, and controls the optical axis changing means according to a duration of the pulse of each beam; and the controller causes the optical axis changing means to direct one pulse of one beam to one processing position coordinate and then deflect an angle of the beams so that the next pulse is directed to an adjoining processing position coordinate until a beam has been deflected to each of a predetermined plurality of processing position coordinates, and to repeat application of one beam for one pulse and deflection to the adjoining processing portion coordinate a plurality of times until a via hole is formed at each processing position coordinate of the predetermined plurality of coordinates.