Patent ID: 7357884

Claim:
A conductive ink composition, comprising a solid material consisting of 60% to 95% by mass of metal fine particles and 5% to 40% by mass of protective colloids, wherein the metal fine particles are each coated with the protective colloids, wherein each of the protective colloids are made from a raw material containing (A) an alkylamine having 5 carbon atoms to 20 carbon atoms and (B) a carboxylic acid component which is a mixture of (I) at least one carboxylic acid selected from carboxylic acids having 4 carbon atoms to 9 carbon atoms, and (II) at least one carboxylic acid selected from carboxylic acids having 10 carbon atoms to 30 carbon atoms, wherein the average number of carbon atoms contained in said (B) carboxylic acid component ranges from 5 to 25, and wherein the metal fine particles consist of an alloy containing at least a noble metal.