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    • 1. 发明申请
    • METHODS FOR LASER CUTTING GLASS SUBSTRATES THROUGH NARROW APERTURES
    • WO2023081082A1
    • 2023-05-11
    • PCT/US2022/048347
    • 2022-10-31
    • CORNING INCORPORATED
    • MALCHUS, Reinhard MoritzTAYLOR, Lauren LeighUNGARO, Craig John Mancusi
    • C03B33/02B23K26/06B23K26/066B23K26/067B23K26/08B23K26/53
    • The present invention relates to a method of laser processing a glass substrate, the method comprising: focusing a pulsed laser beam into a laser beam focal line, which is formed via an optical arrangement and oriented along the beam propagation direction and directed into the glass substrate, the glass substrate having a feature formed on a first surface of the glass substrate, the laser beam focal line generating an induced absorption within the glass substrate, and the induced absorption producing a defect line along the laser beam focal line within the substrate, wherein a first portion of the laser beam focal line is focused at the first surface of the glass substrate and a second portion of the laser beam focal line is focused at a second surface of the glass substrate that is opposite the first surface, wherein a first set of rays exiting the optical arrangement at a first radius R1, as measured from a center of the optical arrangement forms the first portion of the laser beam focal line with a deflection angle of θ1, wherein a second set of rays exiting the optical arrangement at a second radius R2, as measured from the center of the optical arrangement forms the second portion of the laser beam focal line with a deflection angle of θ2, wherein R1 is less than R2; and wherein θ1 is greater than θ2, and wherein θ1 decreases to θ2 from R1 to R2 in one of a step-wise decrease or a graded decrease; and translating the glass substrate and the laser beam relative to each other along a first contour, thereby laser forming a plurality of defect lines along the first contour within the substrate.