Patent ID: 8350637

Claim:
A circuit substrate, comprising: a first pair of ground lines located on a first surface of the circuit substrate; a second pair of ground lines located on a second surface of the circuit substrate, the second surface opposite to the first surface; a plurality of first connection lines located on the first surface and corresponding to the second pair of ground lines; a plurality of second connection lines located on the second surface and corresponding to the first pair of ground lines; a plurality of conductive pillars located in the circuit substrate and vertically conducted between the first pair of ground lines and the second connection lines, and vertically conducted between the second pair of ground lines and the first connection lines, and the first and second pairs of ground lines are conducted, so that a three-dimensional (3-D) grounding circuit loop is formed; a first pair of signal lines located on the first surface and disposed between the first connection lines electrically connected to the second pair of ground lines; a second pair of signal lines located on the second surface and disposed between the second connection lines electrically connected to the first pair of ground lines; a plurality of bonding pads located on the first surface and arranged in an array, the plurality of bonding pads comprising a first pair of signal pads, a second pair of signal pads, a first pair of ground pads, a second pair of ground pads, a first pair of power pads, and a second pair of power pads, wherein the first pair of signal pads is respectively connected to a terminal of the first pair of signal lines, the second pair of signal pads is respectively connected to a terminal of the second pair of signal lines, the first pair of ground pads is respectively connected to a terminal of the first pair of ground lines, and the second pair of ground pads is respectively connected to a terminal of the second pair of ground lines; a first pair of power lines having a terminal respectively connected to the first pair of power pads; and a second pair of power lines having a terminal respectively connected to the second pair of power pads.