Conductive paste for screen printing

A method to produce a circuit pattern by using a conductive paste for screen printing, comprising;

• providing the conductive paste, wherein the conductive paste comprises:
• metal nanoparticles (Y) having an average particle diameter of 1 to 50 nm and having a surface coated with a polymer compound having a branched polyalkyleneimine chain and a polymer chain selected from the group consisting of a polyoxyalkylene chain, a polymer chain composed of a polyvinyl alcohol, a polymer chain composed of a water-soluble poly(meth)acrylic acid, a polyacylalkyleneimine chain having a hydrophilic substituent, and a polymer chain composed of a polyacrylamide;
• metal particles (Z) having an average particle diameter of 200 to 600 nm;
• an aliphatic monocarboxylic acid having 6 to 10 carbon atoms;
• and
• an organic solvent (B),
• wherein a polyalkylene glycol is used as the organic solvent (B),
• printing the conductive paste on a substrate, and
• baking the conductive paste at a temperature of 150° C. or lower to form a circuit pattern having a resistivity on the order of 10−6 Ωcm.