Glasses for flat panel displays
AssigneeCorning Incorporated
InventorsLisa C. Chacon, Adam J. G. Ellison, George B. Hares, Jeffrey T. Kohli, Josef C. Lapp, Robert Morena
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Abstract
Glasses are disclosed which are used to produce substrates in flat panel display devices. The glasses exhibit a density less than about 2.45 gm/cm3 and a liquidus viscosity greater than about 200,000 poises, the glass consisting essentially of the following composition, expressed in terms of mol percent on an oxide basis: 65-75 SiO2, 7-13 Al2O3, 5-15 B2O3, 0-3 MgO, 5-15 CaO, 0-5 SrO, and essentially free of BaO. The glasses also exhibit a strain point exceeding 650° C.
Claims74
An aluminosilicate glass exhibiting a density less than about 2.45 g/cm3 and a liquidus viscosity greater than about 200,000 poises, the glass consisting essentially of the following composition as calculated in mol percent on an oxide basis:
- 65-75 SiO2, 7-13 Al2O3, 5-15 B2O3, 0-3 MgO, 5-15 CaO, 0-5 SrO, and less than about 0.1 BaO, wherein the glass has a linear coefficient of thermal expansion (CTE) over the temperature range 0-300° C. between 28-33×10−7/° C.
An aluminosilicate glass comprising in mol percent on an oxide basis:
- 65-75 SiO2, 7-13 Al2O3, and 5-15 B2O3, wherein:
- (a) said glass has a RO/Al2O3 ratio between 0.9 and 1.2, wherein R represents Mg, Ca, Sr, and Ba;
- (b) the glass has a CaO concentration between 5 mol percent and 15 mol percent on an oxide basis;
- and
- (c) the glass has a density less than about 2.45 gram/cm3, a liquidus viscosity greater than about 200,000 poises, and a linear coefficient of thermal expansion over the temperature range from 0° C. to 300° C. between 28×10−7/° C. and 33×10−7/° C.
Dependencies are inferred from the claim text.