	US 11,718,554 B2
	Chemically strengthenable lithium aluminosilicate glasses with inherent damage resistance
George Halsey Beall, Big Flats, NY (US); Matthew John Dejneka, Corning, NY (US); Qiang Fu, Painted Post, NY (US); Sinue Gomez, Corning, NY (US); Robert Michael Morena, Lindley, NY (US); and Charlene Marie Smith, Corning, NY (US)
Assigned to CORNING INCORPORATED, Corning, NY (US)
Filed by CORNING INCORPORATED, Corning, NY (US)
Filed on Nov. 9, 2021, as Appl. No. 17/522,221.
Application 16/193,266 is a division of application No. 15/400,267, filed on Jan. 6, 2017, granted, now 10,131,567, issued on Nov. 20, 2018.
Application 17/522,221 is a continuation of application No. 16/193,266, filed on Nov. 16, 2018, granted, now 11,220,452.
Claims priority of provisional application 62/276,431, filed on Jan. 8, 2016.
Prior Publication US 2022/0064052 A1, Mar. 3, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C03C 3/097 (2006.01); C03C 3/087 (2006.01); C03C 21/00 (2006.01); C03C 3/091 (2006.01); C03C 3/093 (2006.01); B32B 17/06 (2006.01); H05K 5/03 (2006.01); C03C 3/085 (2006.01); C03C 4/18 (2006.01); H05K 5/00 (2006.01)

CPC C03C 3/097 (2013.01) [B32B 17/06 (2013.01); C03C 3/085 (2013.01); C03C 3/087 (2013.01); C03C 3/091 (2013.01); C03C 3/093 (2013.01); C03C 21/002 (2013.01); H05K 5/03 (2013.01); B32B 2307/50 (2013.01); C03C 4/18 (2013.01); C03C 2204/00 (2013.01); H05K 5/0017 (2013.01)]

20 Claims

1. A lithium aluminosilicate glass article, wherein the lithium aluminosilicate glass article is formed from a glass comprising:

from 55 mol % to 75 mol % SiO₂;

from 10 mol % to 18 mol % Al₂O₃; and

from 5 mol % to 14 mol % Li₂O,

wherein Li₂O (mol %)/R₂O (mol %) is in a range from 0.15 to 0.4, R₂O=Li₂O+Na₂O+K₂O+Rb₂O+Cs₂O, and the lithium aluminosilicate glass article is ion exchanged and has a compressive layer extending to a depth of layer of at least 70 μm from at least one surface into the lithium aluminosilicate glass article, the compressive layer having a maximum compressive stress of at least 600 MPa, wherein the lithium aluminosilicate glass article has a Vickers crack initiation threshold of at least 10 kgf and a Knoop scratch threshold of at least 8 N.