Patent ID: 8263900

Claim:
A laser beam processing machine comprising: a chuck table holding a workpiece; laser beam irradiation means for directing a laser beam to the workpiece held by the chuck table; and processing-transfer means for processing-transferring the chuck table and laser beam irradiation means in a relative manner; wherein said laser beam irradiation means includes laser beam oscillation means and a processing head having a condenser lens condensing a laser beam oscillated from the laser beam oscillation means, and said processing head includes a liquid column forming mechanism provided with a jet nozzle adapted to jet liquid along an optical path for the laser beam condensed by the condenser lens, and a water droplet suction mechanism disposed below the liquid column forming mechanism and provided with an insertion passage through which a liquid column jetted from the jet nozzle is passed and with an annular suction port formed to surround the insertion passage and communicate with suction means.