Patent ID: 7615410

Claim:
A method to assemble a semiconductor package comprising: providing a semiconductor wafer including a plurality of dies, each having a plurality of contact areas on its active surface, cutting the wafer to form a plurality of individual dies, attaching a first adhesive foil to a passive surface of the plurality of individual dies, providing a substrate including a plurality of electrically conductive bumps on its surface, laterally aligning the first adhesive foil including the plurality of individual dies and the substrate including the electrically conductive bumps, so that the electrically conductive bumps face and are vertically aligned with the contact areas on the active surfaces of the plurality of individual dies, pressing the first adhesive foil and the substrate together and heating to form connections between the contact areas on the plurality of individual dies and the substrate, removing the first adhesive foil, embedding the plurality of individual dies in a mold mass so that at least sides of each die and sides of the electrically conductive bumps are encapsulated by the mold mass, removing the substrate to expose the ends of the electrically conductive bumps on a surface of the mold mass, attaching a second adhesive foil to a side of the mold mass opposite the surface including the electrically conductive bumps, and cutting the mold mass to form encapsulated semiconductor packages.