Patent ID: 8486308

Claim:
A paste composition comprising an inorganic solid portion comprising: (a) about 75% to about 99% by weight based on solids of a source of electrically conductive metal; (b) about 0.1% to about 10% by weight based on solids of a substantially lead-free glass component comprising: 1-25 wt. % of SiO 2 ; 0.1-3 wt. % of Al 2 O 3 ; 50-85 wt. % of at least one of bismuth oxide and bismuth fluoride, the amount of bismuth oxide being at least 10 wt. % and the amount of bismuth fluoride being at most 50 wt. %; and at least 1 wt. % of at least one of TiO 2 , ZrO 2 , Li 2 O, ZnO, P 2 O 5 , LiF, NaF, KF, K 2 O, V 2 O 5 , GeO 2 , TeO 2 , CeO 2 , Gd 2 O 3 , or a mixture thereof; wherein the weight percentages are based on the total glass component; and (c) about 0.1 to about 5% by weight based on solids of a discrete lithium-containing additive; wherein the inorganic solid portion is dispersed in an organic medium and the paste composition is substantially Pb-free.