Patent ID: 7608204

Claim:
A conductive ink composition comprising: about 40% to about 80% by weight of a non-aqueous solvent mixture comprising a first solvent having a viscosity of about 0.1 mPa·s to about 5 mPa·s at about 25° C., a second solvent having a viscosity of about 15 mPa·s to about 40 mPa·s at about 25° C., and a third solvent having a vapor pressure of about 10 mmHg to about 250 mmHg at about 25° C.; about 15% to about 50% by weight of copper nanoparticles; about 0.01% to about 5% by weight of a dispersion agent; and about 1% to about 20% by weight of a wetting agent.