Some of the embodiments of the present disclosure provide a semiconductor package interposer comprising a substrate having a first surface and a second surface, a plurality of vias extending between the first surface and the second surface of the substrate, the plurality of vias electrically connecting electrical connectors or circuitry on the first surface of the substrate to electrical connectors or circuitry on the second surface of the substrate, and metal plugs at least partially filling the plurality of vias. At least one of (i) the first surface or (ii) the second surface of the substrate includes depressions at distal ends of the metal plugs.