Patent ID: 11878941
Assignee: CORNING INCORPORATED
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 1:
2. The glass of claim 1, wherein:
a. the physical central tension CT is greater than 0.728×(57−9.0×ln(t)+49.3×(ln(t))2) when 0.3 mm≤t≤0.5 mm, wherein the unit of 57 is MPa, the unit of −9.0 is MPa/mm, the unit of ln(t) is mm, the unit of 49.3 is MPa/mm and the unit of (ln(t))2 is mm;
b. the physical central tension CT is greater than 0.751×(57−9.0×ln(t)+49.3×(ln(t))2) when 0.5 mm≤t≤0.7 mm, wherein the unit of 57 is MPa, the unit of −9.0 is MPa/mm, the unit of ln(t) is mm, the unit of 49.3 is MPa/mm and the unit of (ln(t))2 is mm; and
c. the physical central tension CT is greater than 0.768×(−38.7×ln(t)+48.2) when 0.7 mm<t≤1.0 mm, wherein the unit of −38.7 is MPa/mm, the unit of ln(t) is mm, and the unit of 48.2 is MPa.