Patent ID: 6749737
Filing Date: 2004-06-15
Classification: C25D,H05K

Abstract:
A method of forming a solid conductive rod, comprising:providing a printed circuit board, wherein the printed circuit board includes an insulating core layer, a first conductive layer and a second conductive layer with the insulating core layer sandwiched between the first conductive layer and the second conductive layer; forming a first opening in the first conductive layer, wherein the first opening exposes a portion of the insulating core layer; conducting a drilling operation to remove the exposed insulating core layer and form a second opening, wherein the second opening exposes a portion of the second conductive layer; forming an electroplating mask to cover exposed surfaces of the first conductive layer and the second conductive layer, wherein the second opening and a portion of the second conductive layer remain exposed; conducting an electroplating process using the second conductive layer, through the exposed portion, as an electrode to fill the first and the second openings solidly with a conductive material; removing the electroplating mask; and performing a planarizing process on the first conductive layer to remove a protruding portion of the filled conductive material.