Patent ID: 8097490

Claim:
A method of making a semiconductor device, comprising: providing a carrier; mounting a first semiconductor die to the carrier; forming a plurality of conductive pillars over the carrier around the first semiconductor die; depositing an encapsulant over the first semiconductor die and conductive pillars; forming a first stepped interconnect layer over a first surface of the encapsulant and first semiconductor die, the first stepped interconnect layer having a first opening; forming a second stepped interconnect layer over the first stepped interconnect layer, the second stepped interconnect layer having a second opening; removing the carrier; forming a build-up interconnect structure over a second surface of the encapsulant and first semiconductor die opposite the first surface of the encapsulant; mounting a second semiconductor die over the first semiconductor die and partially within the first opening electrically connected to the first stepped interconnect layer; and mounting a third semiconductor die over the second semiconductor die and partially within the second opening electrically connected to the second stepped interconnect layer.