Patent ID: 7696618

Claim:
A semiconductor device having package-on-package (POP) configuration, comprising: a first semiconductor package including a first encapsulant, at least a first chip encapsulated inside the first encapsulant, and a plurality of first external leads, wherein the first external leads are extended and exposed from at least one side of the first encapsulant; a second semiconductor package disposed above the first semiconductor package, the second semiconductor package including a second encapsulant, at least a second chip encapsulated inside the second encapsulant, and a plurality of second external leads, wherein the second external leads are extended and exposed from at least one side of the second encapsulant; and soldering materials soldering the second external leads to the corresponding first external leads, wherein the second encapsulant has a bottom surface movable with respect to the soldering materials on the second external leads and with respect to a top surface of the first encapsulant.