Integrated circuit packaging system having dual sided connection and method of manufacture thereof

1. A method of manufacture of an integrated circuit packaging system comprising:

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 post over the substrate with the conductive post 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 post with the pre-attached interconnect over the device through via; and

forming an encapsulation over the substrate covering the integrated circuit, the conductive post, and covering vertical edges of the pre-formed interposer.

2. The method as claimed in claim 1 wherein mounting the pre-formed interposer over the integrated circuit and the conductive post with the pre-attached interconnect over the device through via includes electrically coupling the pre-attached interconnect and the device through via.

3. The method as claimed in claim 1 wherein forming the encapsulation over the substrate covering the integrated circuit, the conductive post, and partially covering the pre-formed interposer includes exposing the interposer through via.

4. The method as claimed in claim 1 wherein forming the encapsulation over the substrate covering the integrated circuit, the conductive post, and partially covering the pre-formed interposer includes forming the encapsulation coplanar with the exposed portion of the pre-formed interposer.

5. The method as claimed in claim 1 wherein providing the pre-formed interposer, having the interposer through via and the pre-attached interconnect, with the pre-attached interconnect attached to the interposer through via includes providing the pre-formed interposer having a pre-attached solder on pad bump.

6. A method of manufacture of an integrated circuit packaging system comprising:

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 and the substrate;

attaching a conductive post over the substrate with the conductive post 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 post with the pre-attached interconnect over the device through via; and

forming an encapsulation over the substrate covering the integrated circuit, the conductive post, and covering vertical edges of the pre-formed interposer with the encapsulation coplanar with the exposed top portion of the pre-formed interposer.

7. The method as claimed in claim 6 wherein mounting the pre-formed interposer over the integrated circuit and the conductive post with the pre-attached interconnect over the device through via includes electrically coupling the pre-attached interconnect and the conductive post.

8. The method as claimed in claim 6 wherein providing the pre-formed interposer includes providing an organic interposer.

9. The method as claimed in claim 6 further comprising connecting a mounting device and the device through via.

10. The method as claimed in claim 6 wherein mounting the integrated circuit includes mounting a flip chip.

11. An integrated circuit packaging system comprising:

a substrate;

an integrated circuit, having a device through via and a device interconnect, over the substrate with the device through via traversing the integrated circuit and the device interconnect attached to the device through via;

a conductive post over the substrate with the conductive post adjacent to the integrated circuit;

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 including:

the pre-formed interposer having the characteristics of the pre-attached interconnect pre-attached to a carrier of the pre-formed interposer, and

the pre-formed interposer over the integrated circuit and the conductive post with the pre-attached interconnect over the device through via; and

an encapsulation over the substrate covering the integrated circuit, the conductive post, and covering vertical edges of the pre-formed interposer.

12. The system as claimed in claim 11 wherein the pre-attached interconnect is electrically coupled to the device through via.

13. The system as claimed in claim 11 wherein the encapsulation exposes the interposer through via.

14. The system as claimed in claim 11 wherein the encapsulation is coplanar with the exposed portion of the pre-formed interposer.

15. The system as claimed in claim 11 wherein the pre-attached interconnect includes a pre-attached solder on pad bump.

16. The system as claimed in claim 11 wherein:

the device interconnect is attached to the substrate; and

the encapsulation is coplanar with the exposed top portion of the pre-formed interposer.

17. The system as claimed in claim 16 wherein the pre-formed interposer is electrically coupled to the conductive post.

18. The system as claimed in claim 16 wherein the pre-formed interposer includes an organic interposer.

19. The system as claimed in claim 16 further comprising a mounting device connected to the device through via.

20. The system as claimed in claim 16 wherein the integrated circuit includes a flip chip.