Patent ID: 7674362

Claim:
A method for fabricating a conductive bump structure of a circuit board, comprising: providing the circuit board having at least a surface formed with a plurality of electrical connection pads; forming an insulating protective layer and a resist layer on the circuit board in sequence; forming a plurality of openings in the insulating protective layer and resist layer at positions corresponding to the electrical connection pads to expose the electrical connection pads of the circuit board; forming a conductive layer on surfaces of the resist layer and openings; forming a metal layer on the conductive layer via electroplating to fill metal in the openings of the insulating protective layer and the resist layer; removing the metal layer and conductive layer formed on the surface of the resist layer via thinning, and retaining the metal layer and conductive layer filled in the openings to form metal bumps on the electrical connection pads; and removing the resist layer, and forming an adhesive layer over exposed surfaces of the metal bumps, so as to form the conductive bump structure for electrically connecting the circuit board to an external electronic component.