Patent ID: 8440917

Claim:
A method of making an electrical package having decreased impedance discontinuity of propagating signals, the method comprising: creating one or more plated through holes (PTHs) within a core dielectric layer of the electrical package, the PTHs having a dielectric internal; coating an inner surface of the dielectric internal wall of the one or more PTHs with a layer of a magnetic material, wherein an interior surface area of the one or more PTHs is coated with the layer of the magnetic material, and wherein the magnetic material modifies the internal and external magnetic environment of the core dielectric by decreasing impedance discontinuity of signals and increasing an inductance of the one or more PTHs; plating an electrically conductive metal layer on top of the layer of the magnetic material; depositing a resin inside the electrically conductive metal layer and filling an internal cavity of the one or more PTHs within the electrically conductive metal layer with the resin; disposing the core dielectric between a first planar conductive layer and a second planar conductive layer in a planar direction that is substantially perpendicular to the one or more PTHs; and embedding a plurality of traces within the first planar conductive layer and the second planar conductive layer to form electrically conductive paths to the one or more PTHs, wherein said embedding the plurality of traces includes: embedding one or more vias and one or more trace pads disposed between each of the one or more first planar conductive layers and serially connected to each other and to the primary trace pad of the first conductive layer, which enable an electrical conductive path from the electrically conductive metal layer of the one or more PTH through the first planar conductive layers; and embedding one or more vias and one or more trace pads disposed between each of the one or more second planar conductive layers and serially connected to each other and to the primary trace pad of the second conductive layer, which enable an electrical conductive path from the electrically conductive metal layer of the one or more PTH through the second planar conductive layers.