Patent ID: 7186586
Filing Date: 2007-03-06
Classification: H01L

Abstract:
1. A manufacturing method comprising: (1) obtaining an interposer comprising: a semiconductor substrate; one or more first conductive contact pads attachable to circuitry placed above the interposer; one or more second conductive contact pads attachable to circuitry placed below the interposer; and one or more conductive paths passing through the semiconductor substrate and connecting at least one of the first contact pads to at least one of the second contact pads; wherein each of the second contact pads protrudes out at a bottom surface of the interposer; (2) obtaining an intermediate integrated circuit packaging substrate comprising: a dielectric substrate or a plurality of dielectric substrates attached to each other; one or more first conductive contact pads attachable to circuitry above the intermediate substrate; one or more second conductive contact pads attachable to circuitry below the intermediate substrate; one or more conductive paths each of which connects at least one first contact pad of the intermediate substrate to at least one second contact pad of the intermediate substrate; wherein each of the one or more first contact pads of the intermediate substrate is formed in a corresponding via in the top surface of the intermediate substrate, each via extending into at least one of the dielectric substrates; (3) inserting the protruding second contact pads of the interposer into the corresponding vias of the intermediate substrate and attaching the second contact pads to the first contact pads of the intermediate substrate without melting of at least portions of the second contact pads of the interposer in the vias.