Patent ID: 8597978

Claim:
A method for forming a semiconductor device, comprising: physically attaching a first semiconductor die to a front surface of a first substrate; electrically connecting the first semiconductor die to circuit routings on the front surface of the first substrate, wherein the circuit routings are electrically connected with a plurality of conductive pads on a back surface of the first substrate; physically attaching a second semiconductor die to a front surface of a second substrate; electrically connecting the second semiconductor die to circuit routings on the front surface of the second substrate, wherein the circuit routings on the front surface of the second substrate are electrically connected with a plurality of conductive pads on a front surface of the second substrate; physically attaching a third semiconductor die to the second semiconductor die; electrically attaching the third semiconductor die to the second semiconductor die through a plurality of through substrate vias (TSVs) within the second semiconductor die; and electrically connecting the plurality of conductive pads on the back surface of the first substrate to the plurality of conductive pads on the front surface of the second substrate.