A method for managing packet traffic in a data processing network includes collecting data indicative of the amount of packet traffic traversing each of the links in the network’s interconnect. The pre-alignment section recognizes in advance all marks on the substrate based on image recognition thereby to determine the dicing positions, and the dicing section merely recognizes a few points of the substrate with an alignment camera. The noble metal insert for the center electrode is preferably in the form of a cylindrical Ir-based tip, which is received within a complimentary recess formed in the center electrode.