Patent ID: 8525347

Claim:
An apparatus for producing chip stacks, comprising: means for forming a plurality of unsingulated first semiconductor chips in a wafer, each of the plurality of unsingutated first semiconductor chips comprising a first chip connection area; means for applying a singutated second semiconductor chip via an electrically conductive layer to each of the plurality of unsingulated first semiconductor chips, each of the unsingulated first semiconductor chip and singulated second semiconductor chips being permanently electrically connected; means for filling a continuous interspace region that extends between each of the singutated second semiconductor chips with a stabilization layer up to a predetermined height; means for thinning at least one of the wafer, the stabilization layer, and the singulated second semiconductor chips; means for forming an opening that extends through the stabilization layer to an electrical connection area at a surface of the wafer; and means for sawing the wafer to produce a plurality of singulated chip stacks, wherein the interspace region extends to a top surface of the chip stack.