Patent ID: 8076588

Claim:
A multilayer wiring board comprising: a first wiring layer, an insulating layer disposed under the first wiring layer, a second wiring layer disposed under the insulating layer, and a plurality of signal electrodes, a plurality of ground electrodes, and a plurality of power supply electrodes which are regularly formed on the first wiring layer such that the plurality of signal electrodes and the plurality of power supply electrodes are alternately formed with each other to form a first column and the plurality of ground electrodes form a second column adjacent to the first column, wherein a plurality of signal wirings, each of the plurality of signal wirings connected to one of the plurality of signal electrodes in the first column and a plurality of power supply wirings, each of the plurality of power supply wirings connected to one of the plurality of power supply electrodes in the first column, are coplanar and are alternately provided on the insulating layer such that one of the plurality of power supply wiring is between at least two of the plurality of signal wirings, and a ground wiring is formed as a plane layer provided in the second wiring layer as an underlayer of such that at least a portion of the plane layer is under the plurality of signal wirings and the plurality of power supply wirings and another portion is connected to the plurality of ground electrodes.