US 11,912,010 B2
Damage resistant glass laminate and methods of making the same
Petr Gorelchenko, Corning, NY (US); Jin Su Kim, Seoul (KR); and Lu Zhang, Painted Post, NY (US)
Assigned to CORNING INCORPORATED, Corning, NY (US)
Appl. No. 17/437,191
Filed by CORNING INCORPORATED, Corning, NY (US)
PCT Filed Feb. 25, 2020, PCT No. PCT/US2020/019642
§ 371(c)(1), (2) Date Sep. 8, 2021,
PCT Pub. No. WO2020/185392, PCT Pub. Date Sep. 17, 2020.
Claims priority of provisional application 62/816,579, filed on Mar. 11, 2019.
Prior Publication US 2022/0161518 A1, May 26, 2022
Int. Cl. B32B 7/028 (2019.01); B32B 17/06 (2006.01); C03C 3/091 (2006.01); C03C 3/097 (2006.01); C03C 4/18 (2006.01); C03C 21/00 (2006.01)
CPC B32B 7/028 (2019.01) [B32B 17/06 (2013.01); C03C 3/091 (2013.01); C03C 3/097 (2013.01); C03C 4/18 (2013.01); B32B 2250/03 (2013.01); B32B 2307/308 (2013.01); C03C 21/002 (2013.01); C03C 2204/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A glass substrate comprising:
a glass clad layer fused to a glass core layer, wherein:
the glass core layer comprises a core glass composition having an average core coefficient of thermal expansion (CTEcore);
the glass clad layer comprises a clad glass composition having an average clad coefficient of thermal expansion (CTEclad) that is less than the CTEcore;
a maximum tensile stress in the glass core layer is less than 15 MPa; and
a compressive stress in the glass substrate extends from a surface of the glass clad layer to a depth of compression of greater than or equal to 10% of a total thickness of the glass substrate; and
the clad glass composition comprises boron and greater than or equal to 55 wt. % SiO2 and less than or equal to 80 wt. % SiO2.