High strain point glasses
AssigneeCorning Incorporated
InventorsBruce G. Aitken, Adam J. G. Ellison, Thomas E. Paulson
Life of this patent
Estimating the term…
Abstract
A family of titania lanthana aluminosilicate glasses, and products such as an electronic device having a poly-silicon coating on such glass as a substrate, are disclosed. The glasses have a strain point in excess of 780° C., a coefficient of thermal expansion of 20-60×10−7/° C., a Young's modulus of greater than 12 Mpsi and are chemically durable.
Claims14
A titania lanthana aluminosilicate glass having a strain point in excess of 780° C., a coefficient of thermal expansion (0-300° C.) of 20-60×10−7/° C., a Young's modulus greater than 12 Mpsi, and a weight loss less than one mg/cm2 in BHF wherein the titania can be partially or completely replaced by tantalum oxide.
An electronic device comprising a poly-silicon film on a transparent, glass substrate, the substrate being a titania lanthana aluminosilicate glass having a strain point in excess of 780° C., a coefficient of thermal expansion in the range of 20-60×10−7/° C., a Young's modulus greater than 12 Mpsi and a weight loss not over one mg/cm2 in BHF wherein the titania can be partially or completely replaced by tantalum oxide.
Dependencies are inferred from the claim text.