Conductive paste for screen printing

摘要

There is provided a conductive paste for screen printing. The conductive paste includes: metal nanoparticles (Y) 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, and a polymer chain composed of a polyacrylamide; an aliphatic monocarboxylic acid having 6 to 10 carbon atoms and/or succinic anhydride; and an organic solvent (B). A polyalkylene glycol is used as the organic solvent (B).

主权项

1. 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 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;an aliphatic monocarboxylic acid having 6 to 10 carbon atoms and/or succinic anhydride; andan organic solvent (B), wherein a polyalkylene glycol is used as the organic solvent (B),wherein a nonvolatile content of the metal nanoparticles (Y) is 70% to 90% on a mass basis in the conductive past, 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 10−5 Ωcm.