Patent ID: 7692115

Claim:
A laser processing device comprising: a laser beam source irradiating a laser beam, and a laser processing head; the laser processing head including a transmitting window through which the laser beam passes to irradiate a material, an aperture formed in a bottom of the laser head and allowing the laser beam to pass through via the transmitting window, an introducing hole introducing a gas into the laser processing head, an exhausting hole discharging an ambient gas contained in the laser processing head to outside, a first air hole introducing the gas to the periphery of the laser irradiating area of the material, a second air hole placed to face the first air hole and allowing to discharge the ambient gas of the laser irradiating area of the material, and a masking shield having an opening placed between the transmitting window and the aperture, and an aerating portion communicated with the introducing hole and exhausting hole, wherein debris generated around a laser irradiating area of the material is discharged via the second air hole communicated with the opening formed in the bottom of the laser processing head, and are caused to attach to the periphery of the masking shield in patterning a resin film or thin metal film on a multilayer film formed in the material using a laser beam.