Patent ID: 7371974

Claim:
A multilayered printed circuit board comprising: a substrate; a multilayered structure built thereon and comprising a plurality of conductor circuits and a plurality of interlaminar resin insulating layers in an alternate fashion; and at least one stack-via structure comprising a plurality of via-holes stacked one another, each of said via-holes being configured to provide electrical connection between respective ones of said conductor circuits through one of said interlaminar resin insulating layers, wherein each of said via-holes includes a metal layer comprising at least one of Cu, Ni, Pd, Co, W and an alloy thereof, said metal layer having a via hole portion extending through said one of said interlaminar resin insulating layers and a land portion formed on said one of said interlaminar resin insulating layers, said via hole portion of said metal layer comprises a filled via structure portion such that said via-holes are stacked one another immediately above said filled via structure portion of each of said via-holes, said via-holes include an outermost layer via-hole in an outermost layer of said interlaminar resin insulating layers, and at least one of said via-holes has said land portion having a land diameter which is larger than a land diameter of said land portion of said outermost layer via-hole.