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US 7,939,457 B2Granted
Low expansion glass material having low expansivity gradient
AssigneeCorning Incorporated
InventorsKenneth Edward Hrdina, Robert Sabia
Life of this patent
Estimating the term…
Abstract
A low expansion glass substrate includes titania and silica and has a thermal expansivity with an average gradient less than 1 ppb/° C./° C. in a temperature range of 19° C. to 25° C.
Claims9
A low expansion glass substrate comprising titania and silica, the low expansion glass substrate having a thermal expansivity with an average gradient less than 1 ppb/° C./° C. over at least a use temperature range of 5° C. to 35° C. and a zero coefficient of thermal expansion (CTE) crossover temperature in a range from greater than 25° C. to 90° C.
Dependencies are inferred from the claim text.