Patent ID: 8618645

Claim:
A package structure, comprising: a circuit substrate; a first semiconductor device formed on the circuit substrate, wherein the first semiconductor device is a functional device and has a plurality of through-silicon via structures; a first molding compound enclosing a first sidewall of the first semiconductor device; a second semiconductor device formed on the first semiconductor device and a first portion of the first molding compound, wherein a dimension of the second semiconductor device is larger than a dimension of the first semiconductor device; a second molding compound at least covering a second sidewall of the second semiconductor device and the rest portion of the top surface of the first molding compound, wherein the first molding compound and the second molding compound are individually formed; a plurality of conductive bumps directly attached a bottom surface of the first semiconductor device and a top surface of the circuit substrate; and an encapsulant formed on the circuit substrate to cover at least a third sidewall of the first molding compound and a fourth sidewall of the second molding compound.