Patent ID: 8248814

Claim:
A printed circuit board (PCB), comprising: a plurality of inner layers; and an outer layer in communication with the inner layers; wherein, the outer layer comprises a plurality of first, second, third and fourth pads, and a plurality of via holes, the electrical performances of the first and second pads are the same as that of the inner layers, the electrical performances of the third and fourth pads are different from that of the inner layers, each of the third pads is adjacent to a corresponding one of the first pads and insulated from the corresponding first pad, each of the fourth pads is adjacent to a corresponding one of the second pads and insulated from the corresponding second pad, the via holes comprises a plurality of first via holes and a plurality of second via holes, each first via hole is electrically connected to a corresponding one of the third pads each second via hole is electrically connected to a corresponding one of the fourth pads, wherein each of the first pads and the second pads defines a cutout extending from an edge to the center thereof, and each of the third pads and the fourth pads is partly received in a corresponding one of the cutouts.