Patent ID: 7969255

Claim:
A multilayer printed circuit board comprising a first layer, a first insulating layer, a ground layer, a second insulating layer, a power supply layer, a third insulating layer, and a second layer, which are sequentially laminated, further comprising: a plurality of first signal lines disposed on the first layer, to receive a first signal; first isolation patterns disposed on the first layer such that the first isolation patterns are arranged between adjacent ones of the plurality of first signal lines, respectively, while being electrically isolated from the plurality of first signal lines; a plurality of first ground lines disposed on the ground layer such that the plurality of first ground lines correspond to the first isolation patterns, respectively, the plurality of first ground lines being connected to ground; a plurality of second signal lines disposed on the second layer, to receive a second signal; second isolation patterns disposed on the second layer such that the second isolation patterns are arranged between adjacent ones of the plurality of second signal lines, respectively, while being electrically isolated from the plurality of second signal lines; and a plurality of second ground lines arranged on the power supply layer such that the plurality of second ground lines are in corresponding alignment correspond to the second isolation patterns, respectively, the plurality of second ground lines being connected to the ground; first connecting patterns disposed on the ground layer such that the first connecting patterns intersect with the plurality of first ground lines.