Patent ID: 11884581
Assignee: CORNING INCORPORATED
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  H  Y | IPC C  H

Claim 13:
14. A method of manufacturing a glass-based article, comprising:
exposing a glass-based substrate having opposing first and second surfaces defining a substrate thickness (t) and having a lithium aluminosilicate composition to an ion exchange treatment comprising a first molten salt bath having a concentration of a sodium salt in a range from 8 mol % to 100 mol % to form the glass-based article,
wherein the glass-based article comprises:
sodium having a non-zero varying concentration extending from a surface of the glass-based article to a depth of the glass-based article;
a compressive layer extending from the surface to a spike depth of layer (DOLspike) from 4 micrometers to 8 micrometers; and

a molar ratio of potassium oxide (K2O) to sodium oxide (Na2O) averaged over a distance from the surface to a depth of the glass-based article of 0.4 micrometers that is from 0.4 to 1.8.