Stackable integrated circuit package system

1. A stackable integrated circuit package system comprising:

an integrated circuit device mounted over a package carrier;

a stiffener mounted over the package carrier, the stiffener is a metallic single body unit continuously surrounding a perimeter of the integrated circuit device;

a mountable package carrier mounted on the stiffener includes a vertical gap between the integrated circuit device and the mountable package carrier, wherein the stiffener is in contact with the mountable package carrier outside of a vertical sidewall perimeter of the integrated circuit device; and

intra-stack interconnects coupled, in a double row around the stiffener, between the package carrier and the mountable package carrier.

2. The system as claimed in claim 1 including a horizontal gap between a sidewall of the integrated circuit device and the stiffener.

3. The system as claimed in claim 1 further comprising a lid over the stiffener and over the integrated circuit device.

4. The system as claimed in claim 1 further comprising an underfill between the integrated circuit device and the package carrier.

5. The system as claimed in claim 1 further comprising an inner encapsulation over the package carrier.

6. The system as claimed in claim 1 wherein the double row is between the periphery of the stiffener and an edge of the package carrier.

7. The system as claimed in claim 6 wherein the stiffener includes an integrated lid mounted over the integrated circuit device.

8. The system as claimed in claim 6 further comprising a lid, over the stiffener, includes metallic material.

9. The system as claimed in claim 6 wherein the stiffener is attached to the package carrier with a bonding agent.

10. The system as claimed in claim 6 wherein the stiffener includes linear shaped segments.

11. A method of manufacturing a stackable integrated circuit package system comprising:

mounting an integrated circuit device over a package carrier;

mounting a stiffener over the package carrier, the stiffener is a metallic single body unit continuously surrounding a perimeter of the integrated circuit device;

mounting a mountable package carrier on the stiffener includes preserving a vertical gap between the integrated circuit device and the mountable package carrier, wherein the stiffener is in contact with the mountable package carrier outside of a vertical sidewall perimeter of the integrated circuit device; and

coupling intra-stack interconnects, in a double row around the stiffener, between the package carrier and the mountable package carrier.

12. The method as claimed in claim 11 wherein mounting the stiffener over the package carrier includes forming a horizontal gap between a sidewall of the integrated circuit device and the stiffener.

13. The method as claimed in claim 11 further comprising attaching a lid over the stiffener and over the integrated circuit device.

14. The method as claimed in claim 11 further comprising forming an underfill between the integrated circuit device and the package carrier.

15. The method as claimed in claim 11 wherein mounting the integrated circuit device includes mounting the integrated circuit device having an inner encapsulation over the package carrier.

16. A method of manufacturing a stackable integrated circuit package system comprising:

mounting an integrated circuit device over a package carrier;

mounting a stiffener over the package career, the stiffener is a metallic single body unit continuously surrounding a perimeter of the integrated circuit device;

mounting a mountable package carrier on the stiffener includes positioning a mountable integrated circuit device for preserving a vertical gap between the integrated circuit device and the mountable package carrier, wherein the stiffener is in contact with the mountable package carrier outside of a vertical sidewall perimeter of the integrated circuit device; and

coupling intra-stack interconnects, in at least a double row around the stiffener, between the package carrier and the mountable package carrier wherein the double row is between the periphery of the stiffener and the edge of the package carrier.

17. The method as claimed in claim 16 further comprising attaching a lid over the stiffener and over the integrated circuit device.

18. The method as claimed in claim 16 wherein mounting the stiffener over the package carrier includes mounting an integrated lid of the stiffener over the integrated circuit device.

19. The method as claimed in claim 16 wherein mounting the stiffener over the package carrier includes attaching the stiffener to the package carrier with a bonding agent.

20. The method as claimed in claim 16 wherein mounting the stiffener over the package carrier includes mounting the stiffener having linear shaped segments.