US 12,459,855 B2
Fracture resistant glass-based articles
Xiaoju Guo, Pittsford, NY (US); Pascale Oram, Hammondsport, NY (US); Rostislav Vatchev Roussev, Painted Post, NY (US); and Ljerka Ukrainczyk, Ithaca, NY (US)
Assigned to CORNING INCORPORATED, Corning, NY (US)
Appl. No. 17/642,273
Filed by CORNING INCORPORATED, Corning, NY (US)
PCT Filed Sep. 11, 2020, PCT No. PCT/US2020/050348
§ 371(c)(1), (2) Date Mar. 11, 2022,
PCT Pub. No. WO2021/050837, PCT Pub. Date Mar. 18, 2021.
Claims priority of provisional application 62/900,157, filed on Sep. 13, 2019.
Prior Publication US 2022/0324746 A1, Oct. 13, 2022
Int. Cl. B32B 15/04 (2006.01); B32B 17/06 (2006.01); C03C 3/091 (2006.01); C03C 3/095 (2006.01)
CPC C03C 3/091 (2013.01) [C03C 3/095 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A glass-based article, comprising:
a glass-based substrate comprising opposing first and second surfaces defining a substrate thickness (t); and
a stress profile comprising:
a peak tension (PT) of greater than or equal to 70 MPa; and
a point with a second derivative value of less than or equal to −4000 MPa/mm2 where the point is located within the region of greater than or equal to 0.025t to less than or equal to 0.25t.