Patent ID: 8895872

Claim:
A printed circuit board, comprising: a base, having a first surface and a second surface opposite to the first surface; two first signal traces, formed on the first surface of the base; a first grounding layer, formed on the first surface of the base, wherein the first grounding layer is adjacent to the two first signal traces; two second signal traces, formed on the second surface of the base; a second grounding layer, formed on the second surface of the base, wherein the second grounding layer is adjacent to the two second signal traces; two signal conductive pillars, extended to the second surface of the base from the first surface of the base, wherein each signal conductive pillar connects the corresponding first signal trace and the second signal trace; and two grounding conductive pillars, extended to the second surface of the base from the first surface of the base, wherein each grounding conductive pillar connects the first grounding layer and the second grounding layer, and an extension direction of a long axial of one of the two grounding conductive pillars passes through between the two first signal traces; wherein each signal conductive pillar and the corresponding grounding conductive pillar are disposed in pairs.