Glasses for flat panel displays
First Claim
Patent Images
1. 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.
0 Assignments
0 Petitions
Accused Products
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.
-
Citations
74 Claims
-
1. 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57)
- 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°
-
23. 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.- View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74)
- 65-75 SiO2, 7-13 Al2O3, and 5-15 B2O3, wherein;
Specification