21. A microelectronic system, comprising:a base, comprising
an internal conductive layer;
a build-up layer on the internal conductive layer, said build-up layer comprising a top conductive layer;
a plurality of microvias in the build-up layer to electrically connect the top conductive layer with the internal conductive layer;
a power net in the top conductive layer, said power net comprising a plurality of power ball pads arranged in cascade; and
a ground net disposed being in close proximity to said power net and coupled to said power net in an interdigitated fashion, wherein said ground net comprises a plurality of ground ball pads arranged in cascade; and
a semiconductor device mounted on the base.