Copper conductor paste and production method of copper conductor film

摘要

A conductor paste comprising a high-polymer composite obtained by dispersing super-fine-granulated copper oxide in a polymer without being aggregated, mixed copper powders mainly composed of a base copper powder having a mean particle size of 1 to 10 mu m added with at least one kind of an auxiliary copper powder having a mean particle size smaller than that of the base copper powder, and an organic solvent, wherein the wight ratio of the mixed copper powders to copper oxide in the high-polymer composite is 5 to 50 to 1 of copper oxide and the total amount of copper oxide and the mixed copper powders is 50 to 90% by weight of the conductor paste, and a production method a conductor film by coating the conductor paste on the surface of a substrate and after pre-burning the conductor paste under temperature raising, burning the conductor paste to form the conductor film on the substrate.