Patent ID: 6906411

Claim:
A multi-layer substrate module receiving a supply of a reference potential from an external potential node, comprising: a plurality of insulating layers laminated to each other; a plurality of reference potential transmission nodes electrically coupled to said external potential node; a plurality of internal circuits each including at least one circuit element formed either in one of the plurality of insulating layers or on a surface of said multi-layer substrate module; a plurality of reference potential lines provided corresponding to said plurality of internal circuits, such that one of said plurality of reference potential lines is provided to connect one of said plurality of internal circuits to a corresponding one of said reference potential nodes for transmitting said reference potential; and a plurality of via holes extending through at least a part of said plurality of insulating layers, the plurality of via holes being provided between said plurality of internal circuits and the plurality of reference potential transmission nodes, wherein said plurality of reference potential lines are formed in said plurality of via holes, and one of said plurality of via holes in which one of said plurality of reference potential lines is formed has a larger cross-sectional area than that of each of a remainder of said plurality of via holes.