Patent ID: 8089005

Claim:
A wiring structure of a substrate adapted to mount a plurality of integrated circuits, the wiring structure comprising: a signal wire for connecting the integrated circuits to each other; first and second power supply layers faced to each other; and a return path wire arranged generally in parallel to the signal wire; wherein: the signal wire, the first and the second power supply layers, and the return path wire are flush with one another on a plane; wherein: the return path wire has opposite terminal ends connected to at least one of the first and the second power supply layers; the signal wire, the return path wire, and an insulating film sandwiched between the signal wire and the return path wire form a primary capacitance on the same plane; and wherein: the first power supply layer, the second power supply layer, and the insulating film sandwiched between the first and the second power supply layers form a secondary capacitance.