Patent ID: 6872894

Claim:
An information handling system comprising a circuitized substrate assembly including a first circuitized substrate including alternating layers of dielectric material and conductive material therein and further including an opening therein extending substantially through the thickness of said first circuitized substrate, a second circuitized substrate bonded to said first circuitized substrate and including alternating layers of dielectric material and conductive material therein and further including an opening therein extending substantially through the thickness of said second circuitized substrate and aligned with said opening in said first circuitized substrate, said second circuitized substrate including a quantity of electrically conductive paste substantially completely filling said opening in said second, bonded circuitized substrate prior to and subsequent said bonding of said second circuitized substrate to said first circuitized substrate, said first circuitized substrate including substantially none of said electrically conductive paste within said opening of said first circuitized substrate prior to said bonding of said second circuitized substrate to said first circuitized substrate but including a portion of said electrically conductive paste within said opening within said first circuitized substrate subsequent to said bonding, said electrically conductive paste not being engaged by a layer of dielectric material prior to said bonding, and a layer of dielectric material positioned on an external surface of said first circuitized substrate and extending within said opening of said first circuitized substrate.