Patent ID: 7569162

Claim:
An electrically conductive paste which can be used for forming wiring conductors and which can be co-fired when firing for sintering ceramic layers in a multilayer ceramic substrate provided with the plurality of laminated ceramic layers with the wiring conductors disposed in association with the ceramic layers, the electrically conductive paste comprising 60 to 85 percent by weight of a metal powder having an inorganic component which is not sintered at a sintering temperature capable of sintering the ceramic layer in the firing and which is an oxide of at least one of Al, Si, Zr, Ni, Ti, Nb, Mn and Mg disposed on particle surfaces of the metal powder, 1 to 10 percent by weight of a glass frit having a softening point 150° C. to 300° C. lower than the sintering temperature, and an organic vehicle, wherein the softening point of the glass frit is 650° C. to 850° C. and the glass frit contains 40 to 55 percent by weight of SiO 2 , 10 to 20 percent by weight of B 2 O 3 and 20 to 30 percent by weight of one or both of BaO and SrO.