Patent ID: 8913401

Claim:
A multilayer wiring board comprising: a signal electrode, a first power supply electrode, and a ground electrode that are provided on a mounting surface and connected to a first element that outputs a signal; an electrode that is provided on the mounting surface and connected to a second element that receives the signal output from the first element through the signal electrode; a ground layer that is provided for both the first and second elements and serves as a return path for a return current of the signal received by the second element; a first power supply layer that is disposed adjacent to the ground layer with a dielectric layer interposed therebetween and supplies electric power to the first element through the first power supply electrode; and a second power supply layer that is provided independently of the first power supply layer and supplies electric power to the second element, wherein the first power supply layer causes the return current that flows through the ground layer to return to the first element through the first power supply electrode as a displacement current between the ground layer and the first power supply layer.