Patent ID: 8883046
Filing Date: 2014-11-11
Classification: C09D,H01B,H01L,H05K

Abstract:
1. A conductive metal ink composition which comprises a conductive metal powder; a non-aqueous solvent comprising a first non-aqueous solvent having a vapor pressure of 3 torr or lower at 25° C. and a second non-aqueous solvent having a vapor pressure of higher than 3 torr at 25° C.; and a coatability improving polymer, and which is used for forming a conductive pattern, by being printed on a substrate with a roll-printing process, wherein the first non-aqueous solvent comprises at least one nonvolatile solvent selected from the group consisting of propylene glycol, glycerol, propylene glycol propylether, ethyleneglycol monophenylether, ethyleneglycol monoisopropylether, ethyleneglycol monobutylether, propyleneglycol monobutylether, diethyleneglycol monobutylether, diethyleneglycol monobutylether acetate, diethyleneglycol ethylether, N-methylpyrrolidone, hexadecane, pentadecane, tetradecane, tridecane, dodecane, undecane, decane, DMSO, acetonitrile and butylcellosolve, wherein the coatability improving polymer comprises at least an adhesive polymer selected from the group consisting of epoxy-based polymer, phenol-based polymer, alcohol-based polymer, urethane-based polymer, ethylene vinyl acetate, rosin-based resin, acrylic polymer, styrene-butadiene-styrene-based polymer and polyester-based polymer, and wherein the composition comprises 15 to 30 wt % of the conductive metal powder; 5 to 70 wt % of the first non-aqueous solvent; 10 to 75 wt % of the second non-aqueous solvent; 0.1 to 5 wt % of the coatability improving polymer; and 0.01 to 4 wt % of surfactant, on the basis of total weight of the composition.