US 12,240,780 B2
Glass-based articles with stress profiles having regions of enhanced stress
Jennifer Lynn Hunt, Corning, NY (US); and Rostislav Vatchev Roussev, Painted Post, NY (US)
Assigned to Corning Incorporated, Corning, NY (US)
Appl. No. 17/623,791
Filed by CORNING INCORPORATED, Corning, NY (US)
PCT Filed Jul. 1, 2020, PCT No. PCT/US2020/040415
§ 371(c)(1), (2) Date Dec. 29, 2021,
PCT Pub. No. WO2021/003212, PCT Pub. Date Jan. 7, 2021.
Prior Publication US 2022/0242780 A1, Aug. 4, 2022
Int. Cl. C03C 17/02 (2006.01); C03C 3/085 (2006.01); C03C 21/00 (2006.01)
CPC C03C 17/02 (2013.01) [C03C 3/085 (2013.01); C03C 21/002 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A glass-based article comprising:
a lithium containing aluminosilicate composition;
a glass-based substrate having opposing first and second surfaces defining a substrate thickness (t), wherein t is less than or equal to 0.74 mm; and
a stress profile comprising:
a maximum compressive stress (CSmax) of greater than or equal to 450 MPa;
a spike region extending from the first surface to a tail region; and
the tail region extending to a center of the glass-based article;
wherein the tail region comprises:
a region of enhanced stress having a first average compressive stress (Cavg−1), from DOLsp, plus one micron to DOLFSM, of greater than or equal to 100 MPa; and
a FSM depth of layer (DOLFSM) located at a depth of greater than or equal to 13 micrometers.