Patent ID: 11963320
Assignee: CORNING INCORPORATED
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  C | IPC C  H

Claim 0:
1. A glass-based article comprising:
a first surface and a second surface opposing the first surface defining a thickness (t) in a range of 0.1 mm and 2 mm; and
a stress profile extending along the thickness (t) according to a mathematical formula that is a function of the thickness,
wherein all points of the mathematical formula for stress profile in a first thickness range from about 0·t up to 0.020·t and greater than 0.98·t comprises a tangent with a slope of from about −200 MPa/micrometer to about −25 MPa/micrometer or about 25 MPa/micrometer to about 200 MPa/micrometer,
wherein all points of the mathematical formula for stress profile in a second thickness range from 0.035·t to less than 0.965·t comprise a tangent with a slope of from about −15 MPa/micrometer to about 15 MPa/micrometer, wherein the mathematical formula for stress profile along the span of the second thickness range forms a power-law function having a power exponent, wherein the power exponent is from about 1.2 to about 3.2, and
wherein the stress profile comprises a surface compressive stress of from about 300 MPa to about 1100 MPa and a maximum central tension of 50 MPa or more.