Patent ID: 6171987
Filing Date: 2001-01-09
Classification: C03C,H05K

Abstract:
A glass composition comprising, in mole percent of the total composition:glass forming compounds in a total amount of 75 to 85%, wherein said glass forming compounds comprise 40 to 65% SiO.sub.2, 10 to 20% Bi.sub.2 O.sub.3, 0.1 to 3% Al.sub.2 O.sub.3, B.sub.2 O.sub.3 in an amount not higher than 15 mole % of the total composition, and at least one glass forming compound selected from the group consisting of GeO.sub.2, P.sub.2 O.sub.5, Sb.sub.2 O.sub.3, TeO.sub.2, TiO.sub.2, ZrO.sub.2 and mixtures thereof, and glass modifiers in a total amount of 15 to 25%, wherein said glass modifiers comprise 1 to 23% ZnO, 0.1 to 5% CuO, 0.1 to 5% CaO and 0.1 to 2% MgO.