Electric heating – Metal heating – By arc
Reexamination Certificate
2007-06-05
2009-10-27
Evans, Geoffrey S (Department: 3742)
Electric heating
Metal heating
By arc
C219S121620, C219S121680
Reexamination Certificate
active
07608800
ABSTRACT:
A method selectively processes structures on a workpiece with laser pulses. The structures are arranged in a linear pattern having approximately equal pitch. The pulses propagate along a laser beam propagation path terminating at a laser beam spot on the workpiece. The method fires a first processing pulse when the spot coincides with a first structure location, selectively blocks or clears the propagation path during the first pulse, moves the workpiece and the spot relative to one another such that the spot moves toward a second structure location at a speed less than the product of the laser's PRF and the pitch, fires a dummy pulse before the spot reaches the second structure location, blocks the propagation path during the dummy laser pulse, fires another processing pulse when the beam spot coincides with the second structure location, and selectively blocks or clears the propagation path during the second processing pulse.
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Information Disclosure Statement (including Facts Concerning Sales Activities and Readiness for Patenting), U.S. Appl. No. 10/931,461, dated Sep. 11, 2006, 9 pages.
Bruland Kelly
Grant Keith
Stone Steve
Swaringen Steve
Electro Scientific Industries Inc.
Evans Geoffrey S
Stoel Rives LLP
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