Patent ID: 7294289

Claim:
A method for preparing conductive powder which comprises the steps of: coating at least part of a surface of roughly spherical copper powder with silver in an amount of 3 to 30% by weight of silver based on an amount of the copper powder while exposing at least a surface of a portion of an alloy portion of silver and copper to prepare roughly spherical and silver-plated copper powder; further coating a surface of the roughly spherical and silver-plated copper powder with an aliphatic acid in an amount of 0.02 to 1.0% by weight of the aliphatic acid based on an amount of the roughly spherical and silver-plated copper powder; subjecting to surface smoothening treatment of the coated layer of the silver; and uniformly mixing the copper powder which is roughly spherical and coated with silver and aliphatic acid in an amount of 60 to 92% by weight with silver powder in an amount of 8 to 40% by weight.