公开(公告)号：US12233474B2

公开(公告)日：2025-02-25

申请号：US17329578

申请日：2021-05-25

Applicant: CORNING INCORPORATED

Inventor： Valdemaras Juzumas ,  Reinhard Moritz Malchus ,  Sasha Marjanovic ,  Garrett Andrew Piech ,  Vytautas Sabonis ,  Ralf Joachim Terbrueggen

IPC: B23K26/0622 ,  B23K26/06 ,  B23K26/18 ,  B23K26/53 ,  B23K103/00

Abstract: A method of laser processing a transparent workpiece includes directing a pulsed laser beam into the transparent workpiece. The pulsed laser beam includes pulse bursts having 2 sub-pulses per pulse burst or more, each pulse burst of the pulsed laser beam has a burst duration Tbd of 380 ns or greater; and the pulsed laser beam forms a pulsed laser beam focal line in the transparent workpiece, the pulsed laser beam focal line inducing absorption in the transparent workpiece, the induced absorption producing a defect in the transparent workpiece. The pulsed laser beam focal line includes a wavelength λ, a spot size wo, and a Rayleigh range ZR that is greater than F D ⁢ π ⁢ w o 2 λ , where FD is a dimensionless divergence factor comprising a value of 10 or greater.

公开(公告)号：US20210379695A1

公开(公告)日：2021-12-09

申请号：US17329578

申请日：2021-05-25

Applicant: CORNING INCORPORATED

Inventor： Valdemaras Juzumas ,  Reinhard Moritz Malchus ,  Sasha Marjanovic ,  Garrett Andrew Piech ,  Vytautas Sabonis ,  Ralf Joachim Terbrueggen

IPC: B23K26/0622 ,  B23K26/18 ,  B23K26/06 ,  B23K26/53

Abstract: A method of laser processing a transparent workpiece includes directing a pulsed laser beam into the transparent workpiece. The pulsed laser beam includes pulse bursts having 2 sub-pulses per pulse burst or more, each pulse burst of the pulsed laser beam has a burst duration Tbd of 380 ns or greater; and the pulsed laser beam forms a pulsed laser beam focal line in the transparent workpiece, the pulsed laser beam focal line inducing absorption in the transparent workpiece, the induced absorption producing a defect in the transparent workpiece. The pulsed laser beam focal line includes a wavelength λ, a spot size wo, and a Rayleigh range ZR that is greater than F D ⁢ π ⁢ w o 2 λ , where FD is a dimensionless divergence factor comprising a value of 10 or greater.