Patent ID: 7459925

Claim:
A probe card comprising: a printed circuit board (PCB), wherein the printed circuit board comprises: a first region formed on the printed circuit board and provided with a first circuit pattern; a second region formed on the printed circuit board and provided with a second circuit pattern; a third region formed on the printed circuit board and provided with a third circuit pattern; a fourth region formed on the printed circuit board and provided with a fourth circuit pattern, wherein the first region, the second region, the third region and the fourth region are arranged clockwise on the printed circuit board, the first circuit pattern corresponds to the third circuit pattern and the second circuit pattern corresponds to the fourth circuit pattern; a plurality of connectors positioned on the printed circuit board and in the first region, the second region, the third region and the fourth region, where the connectors are connected to a tester electrically via a plurality of cables; and an opening positioned in the center of the printed circuit board; and a plurality of probe needles coupled to the printed circuit board electrically.