Patent ID: 7405146

Claim:
An electroplating method by transmitting an electric current from a ball side, comprising the steps of: providing an IC board having a bump side and a ball side, and a through hole being formed therein, an electroplated metal layer being formed on the bump side, the ball side, and a wall of the through hole, wherein the bump side, and the ball side are electrically connected to each other via the electroplated metal layer; patterning the electroplated metal layer formed on the bump side to form a first circuit layer, wherein the first circuit layer, and the electroplated metal layer formed on the ball side of the IC board are electrically connected to each other; forming an insulating layer on the bump side to expose a portion of a top of the first circuit layer; and forming a first protective layer on the exposed portion of the top of the first circuit layer by transmitting an electric current from the electroplated metal layer formed on the ball side to the first circuit layer formed on the bump side.