Laser processing apparatus
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United States of America Patent
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Jan 6, 2009
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N/A
app pub date -
Jul 11, 2006
filing date -
Jul 12, 2005
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Abstract
A laser processing apparatus comprising a chuck table, laser beam irradiation means for irradiating a workpiece held on the chuck table with a laser beam, and processing feed means for processing-feeding the chuck table and the laser beam irradiation means relative to each other. The laser beam irradiation means includes first laser beam irradiation means for throwing a first pulsed laser beam having a wavelength in the intermediate-infrared radiation region, and second laser beam irradiation means for throwing a second pulsed laser beam having a wavelength in the ultraviolet radiation region. The first laser beam irradiation means and the second laser beam irradiation means are set such that at least a part, in the processing feed direction, of the focus spot of the second pulsed laser beam overlaps the focus spot of the first pulsed laser beam.
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