Patent ID: 11878936
Assignee: CORNING INCORPORATED
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A glass-based article comprising:
a first surface and a second surface opposing the first surface defining a thickness (t) (mm);
a concentration of a metal oxide that is both non-zero and varies along a thickness range from 0·t to 0.3·t;
a surface compressive stress (CS) of 500 MPa or greater;
a central tension (CT) region comprising a maximum CT (MPa) of less than 71.5/√(t) and greater than 45/√(t);
a stored tensile energy in the range from 10 J/m2 to 40 J/m2; and
a depth of compression (DOC) of 0.14·t or greater
wherein the thickness (t) is 3 mm or less,
wherein the glass-based article is a glass-based article derived from an alkali aluminosilicate glass substrate having the following composition:
the ratio of the total amount of R2O (mol %) to the amount of Al2O3 (mol %) in the range of 1 to 5 (R2O/Al2O3), wherein the total amount of R2O represents the total amount of Li2O, Na2O, K2O, Rb2O, and Cs2O; and
the ratio of the amount of Li2O (mol %) to the total amount of R2O (mol %) in the range of 0.1 to 1 (Li2O/R2O), wherein the total amount of R2O represents the total amount of Li2O, Na2O, K2O, Rb2O, and Cs2O.