Patent ID: 9701563
Date: 2017-07-11
CPC Classifications: B23K,B32B,C03B,Y02P,Y10T

Claim:
1. A method of laser processing a fusion formed glass composite workpiece, the method comprising: focusing a pulsed laser beam into a laser beam focal line oriented along the beam propagation direction and directed into the fusion formed glass composite workpiece, the laser beam focal line generating an induced absorption within the fusion formed glass composite workpiece, and the induced absorption producing a defect line along the laser beam focal line within the fusion formed glass composite workpiece; and translating the fusion formed glass composite workpiece and the laser beam relative to each other along a contour, thereby forming a plurality of defect lines within the fusion formed glass composite workpiece, the plurality of defect lines being spaced apart by a distance between 0.5 microns and 20 microns; wherein the fusion formed glass composite workpiece is in the form of a glass sheet, the glass sheet comprising at least two layers having at least two different respective annealing temperatures; and wherein the focusing and the translating are performed within the glass sheet at an online draw; and wherein the focusing and the translating are performed with the glass sheet at a temperature between the at least two different respective annealing temperatures.