Patent ID: 6703186
Filing Date: 2004-03-09
Classification: H05K

Abstract:
A method of forming a conductive circuit pattern on a circuit board having a first region on which a desired conductive circuit pattern is to be formed and a second region, said method comprising the steps of:applying a coating comprising fine conductive particles of a least one of copper and copper oxide and having a diameter of 1-500 nm in a solution comprising at least one of a polymer and oligomer matrix in a solvent to the circuit board to a thickness of 10-1,000 nm, wherein the fine conductive particles are dispersed in the solvent in an amount of 0.001-10 wt. %; drying the coating and removing the solvent by heating at a temperature in the range of 80-500Â° C.; heating the coating in an inert gas atmosphere at a temperature of 500-1100Â° C. for one to sixty minutes to adhere the fine conductive particles to the circuit board; removing the conductive particles in the second region; and forming a conductive film comprising copper on the first region, wherein the step of heating the coating comprises burning the coating to adhere conductive particles as plating catalytic nuclei to the circuit board.