Patent ID: 8030137

Claim:
A method for fabricating a semiconductor apparatus comprising the steps of: providing a first semiconductor chip having terminals in first locations; providing a second semiconductor chip having a height, and terminals in second locations; providing an insulating flexible interposer, integral with conductive traces, having a top and a bottom surface and a rectangular shape; the interposer having slits extending from the corners of the rectangle diagonally inward, the ends of the slits defining a boundary between a central area and peripheral wings on each side of the central area; the central area having metal studs on the top and the bottom surface, the studs on the top surface matching the first terminal locations and the studs on the bottom surface matching the second terminal locations; the central area having conductive vias extending from the top to the bottom surface; the side wings having contact pads with metallic connectors on the bottom surface in third locations; assembling the first chip on the central interposer area so that the terminals contact the studs on the top interposer surface; assembling the second chip on the central interposer area so that the terminals contact the studs on the bottom interposer surface; providing an insulating substrate having attachment sites in locations matching the third pad locations of the interposer side wings; attaching the second chip to the substrate so that the interposer, attached to the chip, faces away from the substrate; bending the four interposer side wings convex downwardly along the second chip height and then concave horizontally over the substrate; aligning the contact pads of the interposer side wings with the matching substrate attachment sites; and attaching the side wing connectors to the sites.