Patent ID: 7589283

Claim:
A method of making a circuitized substrate, said method comprising: providing a first conductive layer having a first plurality of conductive pads oriented in a pattern and electrically coupled to a first electrical component; providing a second conductive layer including a plurality of signal lines; electrically coupling selected ones of said signal lines to respective ones of said conductive pads of said first plurality of conductive pads; providing a first dielectric layer positioned substantially between said first and second conductive layers, providing a third conductive layer including a first voltage plane and a second plurality of conductive pads also oriented in a pattern; electrically coupling selected ones of said second plurality of conductive pads to respective ones of said signal lines of said second conductive layer; and providing a second dielectric layer substantially between said second and third conductive layers such that said plurality of signal lines are positioned substantially between said first conductive layer and said first voltage plane of said third conductive layer so as to substantially prevent impedance disruption during the transmission of signals through said signal lines; said third conductive layer of said circuitized substrate including a second voltage plane having a different voltage than said first voltage plane being positioned substantially beneath said first plurality of conductive pads but not beneath said plurality of signal lines within said second conductive layer.