Patent ID: 8691119

Claim:
A thick film paste composition comprising: (a) 25-55 wt % electrically conductive Ag; (b) 5-35 wt % a second electrically conductive metal selected from the group consisting of Ni, Al and mixtures thereof; (c) 0.5-5 wt % lead-tellurium-lithium-titanium-oxide; (d) 0-5 wt % inorganic additive selected from the group consisting of Bi 2 O 3 , TiO 2 , Al 2 O 3 , B 2 O 3 , SnO 2 , Sb 2 O 5 , Cr 2 O 3 , Fe 2 O 3 , ZnO, CuO, Cu 2 O, MnO 2 , Co 2 O 3 , NiO, RuO 2 , a metal that can generate a listed metal oxide during firing, a metal compound that can generate a listed metal oxide during firing, and mixtures thereof; and (e) an organic medium; wherein said electrically conductive Ag, said second electrically conductive metal, said lead-tellurium-lithium-titanium-oxide and any of said inorganic additive are dispersed in the organic medium, the paste composition comprising less than 70 wt % of inorganic components comprising said electrically conductive Ag, said second electrically conductive metal, said lead-tellurium-lithium-titanium-oxide and any of said inorganic additive, and wherein the wt % are based on the total weight of said paste composition, said lead-tellurium-lithium-titanium-oxide comprising 25-65 wt % PbO, 25-70 wt % TeO 2 , 0.1-5 wt % Li 2 O, and 0.1-5 wt % TiO 2 , based on the total weight of said lead-tellurium-lithium-titanium-oxide.