US Patent 10037963 Package structure and method of forming the same

A package structure and method of forming the same includes: a first package including: a first die; a via adjacent the first die; a molding compound encapsulating the via and at least laterally encapsulating the first die around a perimeter of the first die; and a first redistribution structure extending over the first die and the molding compound; a first integrated passive device (IPD) attached to the first redistribution structure, the first IPD disposed proximate the perimeter of the first die; a second IPD attached to the first redistribution structure, the second IPD disposed distal the perimeter of the first die; and an underfill disposed between the first IPD and the first redistribution structure, the second IPD being free of the underfill.