Glasses for flat panel display
AssigneeCorning Incorporated
InventorsDawne M. Moffatt, Dean V. Neubauer
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Abstract
A barium aluminosilicate glass for production of a panel in an LCD device and a method of producing the panel. The glass consists essentially of, as calculated in percent by weight on an oxide basis, 50-65% SiO.sub.2, at least 8% Al.sub.2 O.sub.3, the Al.sub.2 O.sub.3 being 8-13% in conjunction with 55-65% SiO.sub.2 and 18-22% in conjunction with 50-55% SiO.sub.2, SiO.sub.2 +Al.sub.2 O.sub.3 >68%, 0-8% B.sub.2 O.sub.3, 2-21% BaO, 0-13% SrO, 0-18% CaO, 0-6% MgO and 13-30% BaO+CaO+SrO+MgO.
Claims10
A barium aluminosilicate glass exhibiting a strain point higher than 650.degree. C., a weight loss less than 20 mg/cm.sup.2 after immersion for 24 hours in an aqueous 5% by weight HCl solution at 95.degree. C., a CTE between 34 and 50.times.10.sup.-7 /.degree.C., nominally free of alkali metal oxides and having a composition consisting essentially of, as calculated in percent by weight on an oxide basis, 50-65% SiO.sub.2, at least 8% Al.sub.2 O.sub.3, the Al.sub.2 O.sub.3 being 8-13% and CaO 0-7.1% in conjunction with 55-65% SiO.sub.2 and the Al.sub.2 O.sub.3 being 18-22% and CaO 0-18% in conjunction with 50-55% SiO.sub.2, SiO.sub.2 +Al.sub.2 O.sub.3 >68%, 0-6% B.sub.2 O.sub.3, 2-21% BaO, 0-13% SrO, 0-6% MgO and 13-20% BaO+ CaO+SrO+MgO.
An LCD device comprising a barium aluminosilicate glass panel, the glass exhibiting a strain point higher than 650.degree. C., a weight loss less than 20 mg/cm.sup.2 after immersion for 24 hours in an aqueous 5% by weight HCl solution at 95.degree. C., a CTE between 34 and 50.times.10.sup.-7 /.degree.C., nominally free of alkali metal oxides and having a composition consisting essentially of, as calculated in percent by weight on an oxide basis, 50-65% SiO.sub.2, at least 8% Al.sub.2 O.sub.3, the Al.sub.2 O.sub.3 being 8-13% and CaO 0-7.1% in conjunction with 55-65% SiO.sub.2 and the Al.sub.2 O.sub.3 being 18-22% and CaO 0-18% in conjunction with 50-55% SiO.sub.2, SiO.sub.2 +Al.sub.2 O.sub.3 >68%, 0-6% B.sub.2 O.sub.3, 2-21% BaO, 0-13% SrO, 0-6% MgO and 13-30% BaO+CaO+SrO+MgO.
A method of producing a glass panel for an LCD device which comprises melting a batch for a barium aluminosilicate glass consisting essentially of, as calculated in percent by weight on an oxide basis, 50-65% SiO.sub.2 at least 8% Al.sub.2 O.sub.3, the Al.sub.2 O.sub.3 being 8-13% and CaO 0-7.1% in conjunction with 55-65% SiO.sub.2 and the Al.sub.2 O.sub.3 being 18-22% and CaO 0-18% in conjunction with 50-55% SiO.sub.2, SiO.sub.2 +Al.sub.2 O.sub.3 >68%, 0-6% B.sub.2 O.sub.3, 2-21% BaO, 0-13% SrO, 0-6% MgO and 13-30% BaO+CaO, SrO+MgO, and drawing a thin sheet of molten glass for the melt.
Dependencies are inferred from the claim text.