Barium and/or strontium aluminosilicate crystal-containing glasses for flat panel display devices
First Claim
1. A phase separated glass essentially free from alkali metal oxide consisting of extremely fine-grained crystals homogeneously dispersed in a glass matrix, said glass exhibiting transparency, an annealing point higher than 900°
- C., a linear coefficient of thermal expansion over the temperature range of 25°
-300°
C. between about 30-40×
10-7 /°
C., and consisting essentially, expressed in terms of mole percent on the oxide basis, of aboutSiO2 ;
68-80Al2 O3 ;
18-26BaO and/or SrO;
2-6.
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Accused Products
Abstract
This invention is directed to the fabrication of flat panel display devices wherein a film of large crystal polysilicon is grown on a substrate. More specifically, this invention is drawn to the fabrication of such devices wherein the substrate is fashioned from a phase separated glass consisting essentially of extremely fine-grained crystals homogeneously dispersed in a glass matrix, the base glass therefor being essentially free from alkali metal oxide and consisting essentially, in mole percent, of 2-6% BaO and/or SrO, 18-26% Al2 O3, and 68-80% SiO2.
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Citations
1 Claim
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1. A phase separated glass essentially free from alkali metal oxide consisting of extremely fine-grained crystals homogeneously dispersed in a glass matrix, said glass exhibiting transparency, an annealing point higher than 900°
- C., a linear coefficient of thermal expansion over the temperature range of 25°
-300°
C. between about 30-40×
10-7 /°
C., and consisting essentially, expressed in terms of mole percent on the oxide basis, of aboutSiO2 ;
68-80Al2 O3 ;
18-26BaO and/or SrO;
2-6.
- C., a linear coefficient of thermal expansion over the temperature range of 25°
Specification
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- Resources
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Current AssigneeCorning Glass Works (Corning Incorporated)
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Original AssigneeCorning Glass Works (Corning Incorporated)
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InventorsDumbaugh, William H. Jr.
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Primary Examiner(s)Bell, Mark L.
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Application NumberUS06/790,370Time in Patent Office440 DaysField of Search501/32, 501/69US Class Current501/32CPC Class CodesC03C 3/085 containing an oxide of a di...
