Abstract: A method of manufacture of an integrated circuit packaging system includes: attaching a lower integrated circuit, having a first through via, over a substrate with the first through via coupled to the substrate; mounting a pre-formed interposer, having an interposer through via and an integrated passive device, over the lower integrated circuit with the interposer through via coupled to the first through via; attaching an upper integrated circuit, having a second through via, over the pre-formed interposer; and forming an encapsulation over the upper integrated circuit and the pre-formed interposer.

Abstract: A method of manufacture an integrated circuit packaging system includes: providing a base substrate; mounting a first base integrated circuit over the base substrate; mounting a second base integrated circuit over the first base integrated circuit; attaching a stacking interconnect to the base substrate and adjacent to the first base integrated circuit; and forming a base encapsulation, having a recess portion from a corner of the base encapsulation and a step portion adjacent to the recess portion, with the step portion over the second base integrated circuit and the recess portion exposing the stacking interconnect.

Abstract: A method of manufacture of an integrated circuit packaging system includes: mounting an integrated circuit, having a device through via and a device interconnect, over a substrate with the device through via traversing the integrated circuit and the device interconnect attached to the device through via; attaching a conductive support over the substrate with the conductive support adjacent to the integrated circuit; providing a pre-formed interposer, having an interposer through via and a pre-attached interconnect, with the pre-attached interconnect attached to the interposer through via; mounting the pre-formed interposer over the integrated circuit and the conductive support with the pre-attached interconnect over the device through via; and forming an encapsulation over the substrate covering the integrated circuit, the conductive support, and partially covering the pre-formed interposer.

Abstract: An integrated circuit package-in-package system including: providing a substrate; mounting a structure over the substrate; supporting an inner stacking module cantilevered over the substrate by an electrical interconnect connected to the substrate, the electrical interconnect forming a gap between the inner stacking module and the structure controlled by the size of the electrical interconnect; and encapsulating the structure and inner stacking module with an encapsulation.