US 11,964,898 B2
Laser-induced separation of transparent oxide glass
Stephan Lvovich Logunov, Corning, NY (US); and Alexander Mikhailovich Streltsov, Corning, NY (US)
Assigned to CORNING INCORPORATED, Corning, NY (US)
Appl. No. 17/053,524
Filed by Corning Incorporated, Corning, NY (US)
PCT Filed May 7, 2019, PCT No. PCT/US2019/031092
§ 371(c)(1), (2) Date Nov. 6, 2020,
PCT Pub. No. WO2019/217404, PCT Pub. Date Nov. 14, 2019.
Claims priority of provisional application 62/667,878, filed on May 7, 2018.
Prior Publication US 2021/0363050 A1, Nov. 25, 2021
Int. Cl. C03B 33/09 (2006.01); B23K 26/00 (2014.01); B23K 26/53 (2014.01); C03B 33/02 (2006.01); B23K 103/00 (2006.01)
CPC C03B 33/091 (2013.01) [B23K 26/0006 (2013.01); B23K 26/53 (2015.10); C03B 33/0222 (2013.01); B23K 2103/54 (2018.08)] 19 Claims
OG exemplary drawing
 
1. A method of cutting a glass sheet comprising a transparent oxide glass, the method comprising:
directing a laser beam from a middle-infrared (mid-IR) laser source onto a major surface of the glass sheet;
tuning a wavelength of the laser beam so as to adjust an absorption depth of the laser beam in the glass sheet;
cutting the glass sheet using the laser beam; and
arranging a transparent cover substrate on the major surface of the glass sheet, the cover substrate having a transmission percentage that is greater than a transmission percentage of the glass sheet in a mid-IR wavelength range; and
directing the laser beam through the cover substrate.