Patent ID: 11912614
Assignee: CORNING INCORPORATED
Field: Audio-visual technology (Electrical engineering)
Classification: CPC C  H | IPC B  C  H

Claim 17:
18. A process for making a glass-based article based in part on mechanical modeling, the glass-based article comprising a peak central tension (CT) in a tensile region, the process comprising:
exposing a glass-based substrate comprising opposing first and second surfaces defining a substrate thickness (t) in millimeters (mm) to an ion exchange treatment to form the glass-based article;
generating a stress profile in the glass-based article comprising:
a maximum compressive stress (CSmax) greater than or equal to 150 MPa; and
a depth of compression (DOC) that is greater than or equal to 0.21t;
wherein the peak central tension (CT) in the tensile region that is greater than:
(E/68 GPa)*75 MPa*1 mm0.5/√(t),
where E is Young's modulus value of the glass-based substrate having the same composition and structure as a center of the glass-based article,
wherein the stress profile further comprises a negative curvature region, wherein a second derivative of stress as a function of depth is negative,
wherein the CT is in the range of greater than or equal to 110 MPa and less than or equal to 220 MPa.