Patent ID: 11912010
Assignee: CORNING INCORPORATED
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 9:
10. A glass substrate comprising:
a glass clad layer fused to a glass core layer, wherein:
the glass core layer comprises a core glass composition having an average core coefficient of thermal expansion (CTEcore);
the glass clad layer comprises a clad glass composition having an average clad coefficient of thermal expansion (CTEclad) that is less than the CTEcore;
a maximum tensile stress in the glass core layer is less than 12 MPa; and
the clad glass composition comprises:
greater than or equal to 10 wt. % B2O3 and less than or equal to 50 wt. % B2O3, and
greater than or equal to 55 wt. % B2O3 and less than or equal to 80 wt. % B2O3.