Strontium aluminosilicate glass substrates for flat panel display devices
First Claim
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1. A clear, transparent, homogeneous strontium aluminosilicate glass capable of being melted at temperatures no higher than about 1800°
- C. which exhibits an annealing point greater than 875°
C., a linear coefficient of thermal expansion over the temperature range of 25°
-300°
C. of about 30-40×
10-7 /°
C., a liquidus temperature not exceeding about 1400°
C., and a liquidus viscosity of at least 1×
105 poises, said glass being essentially free from alkali metal oxide, MgO, CaO, ZnO, La2 O3, and MnO, and consisting essentially, expressed in terms of mole percent on the oxide basis, of about9-12% SrO,9-12% Al2 O3,77-82% SiO2.
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Abstract
This invention is concerned with the fabrication of flat panel display devices wherein a film of large crystal polysilicon is grown on a substrate. More particularly, the present invention is drawn to such devices wherein the substrate is prepared from a strontium aluminosilicate glass consisting essentially, in mole percent, of about 9-12% SrO, 9-12% Al2 O3, and 77-82% SiO2.
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2 Claims
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1. A clear, transparent, homogeneous strontium aluminosilicate glass capable of being melted at temperatures no higher than about 1800°
- C. which exhibits an annealing point greater than 875°
C., a linear coefficient of thermal expansion over the temperature range of 25°
-300°
C. of about 30-40×
10-7 /°
C., a liquidus temperature not exceeding about 1400°
C., and a liquidus viscosity of at least 1×
105 poises, said glass being essentially free from alkali metal oxide, MgO, CaO, ZnO, La2 O3, and MnO, and consisting essentially, expressed in terms of mole percent on the oxide basis, of about9-12% SrO, 9-12% Al2 O3, 77-82% SiO2. - View Dependent Claims (2)
- C. which exhibits an annealing point greater than 875°
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Current AssigneeCorning Glass Works Inc. (Corning Incorporated)
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Original AssigneeCorning Glass Works Inc. (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 NumberUS06/790,369Time in Patent Office440 DaysField of Search501/69US Class Current501/69CPC Class CodesC03C 3/085 containing an oxide of a di...G02F 1/1333 Constructional arrangements...
