Patent ID: 7074349

Claim:
An electrically conductive paste fireable in a neutral or reducing atmosphere comprising (a) 30 to 71 wt % conductive powder being selected from the group of copper powder, nickel powder and copper-nickel alloy powder and (b) an inorganic binder, both dispersed in an inert organic medium; wherein the organic medium comprises at least one methyl methacrylate (MMA) polymer dissolved in solvent, said methyl methacrylate polymer having a number-average molecular weight of at least 100,000 and a weight-average molecular weight of at least 1,000,000, such that the methyl methacrylate polymer accounts for 2.0 to 9.0 wt % of the paste, wherein the amount of the inorganic binder is in the range from 5 to 15 wt %, wherein the inorganic binder is selected from Siâ€”Bâ€”Ba glass, Siâ€”Bâ€”Pb glass, Siâ€”Bâ€”Zn glass, or mixtures thereof and the conductive powder and inorganic binder combined is in the range from 45.0 wt % to 76 wt %.