Patent ID: 8043536

Claim:
A conductor film formation method comprising steps of: applying onto a ceramic substrate a conductor paste comprising a) a conductive metal powder consisting of a silver-palladium alloy containing both of silver and palladium and optionally gold or platinum metal powders; b) a glass powder; and c) an organic solvent, wherein the conductive metal powder has an average particle diameter of not more than 1.2 μm, wherein the glass powder is a Bi 2 O 3 —SiO 2 —B 2 O 3 type of glass powder, wherein the content of the glass powder is in a range of from 1 to 6 wt % based on the weight of the paste, and wherein the content of the palladium is in the range of 0.1 to 7 wt % based on the total weight of the silver and palladium present in the alloy powder; and firing the conductor paste that has been applied to the ceramic substrate at not more than 650° C.