Integrated circuit packaging system with encapsulation connector and method of manufacture thereof

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

providing a base integrated circuit package having a base integrated circuit on a base substrate thereof;

attaching a base barrier on the base substrate and adjacent a base perimeter of the base substrate;

mounting a stack substrate over the base substrate, the stack substrate having a stack substrate aperture with the stack substrate having an inter-substrate connector thereon; and

dispensing a connector underfill through the stack substrate aperture encapsulating the inter-substrate connector, overflow of the connector underfill prevented by the base barrier wherein surfaces of the connector underfill of the stack substrate, the stack substrate, and the base integrated circuit package form a cavity.

2. The method as claimed in claim 1 wherein mounting the stack substrate includes mounting the stack substrate having a stack barrier adjacent a stack perimeter thereof.

3. The method as claimed in claim 1 wherein dispensing the connector underfill includes dispensing the connector underfill adjacent the base barrier.

4. The method as claimed in claim 1 wherein dispensing the connector underfill includes dispensing the connector underfill between the base substrate and the stack substrate.

5. The method as claimed in claim 1 further comprising mounting a top integrated circuit package over the stack substrate, the entirety of the top integrated circuit package adjacent the stack substrate aperture.

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

providing a base integrated circuit package having a base integrated circuit on a base substrate thereof;

attaching a base barrier on the base substrate and adjacent a base perimeter of the base substrate;

mounting a stack substrate over the base substrate, the stack substrate having a stack substrate aperture with the stack substrate having an inter-substrate connector thereon and the inter-substrate connector between the base barrier and the base integrated circuit; and

dispensing a connector underfill through the stack substrate aperture encapsulating the inter-substrate connector, overflow of the connector underfill prevented by the base barrier wherein surfaces of the connector underfill of the stack substrate, the stack substrate, and the base integrated circuit package form a cavity.

7. The method as claimed in claim 6 wherein:

mounting the stack substrate includes mounting the stack substrate having a stack substrate protrusion; and

dispensing the connector underfill includes dispensing the connector underfill over a portion of the stack substrate protrusion.

8. The method as claimed in claim 6 further comprising removing a portion of the stack substrate and a portion of the connector underfill, an outer edge of the stack substrate substantially intersected by an extent of the connector underfill.

9. The method as claimed in claim 6 wherein mounting the stack substrate includes mounting the stack substrate having a stack substrate open region adjacent the stack substrate aperture.

10. The method as claimed in claim 6 wherein attaching the base integrated circuit on the base substrate includes attaching a flip chip on the base substrate.

11. An integrated circuit packaging system comprising:

a base integrated circuit package having a base integrated circuit on a base substrate thereof;

a base barrier on the base substrate and adjacent a base perimeter of the base substrate;

a stack substrate over the base substrate, the stack substrate having a stack substrate aperture with the stack substrate having an inter-substrate connector thereon; and

a connector underfill through the stack substrate aperture encapsulating the inter-substrate connector, overflow of the connector underfill prevented by the base barrier wherein surfaces of the connector underfill of the stack substrate, the stack substrate, and the base integrated circuit package form a cavity.

12. The system as claimed in claim 11 wherein the stack substrate includes the stack substrate having a stack barrier adjacent a stack perimeter thereof.

13. The system as claimed in claim 11 wherein the connector underfill is adjacent the base barrier.

14. The system as claimed in claim 11 wherein the connector underfill is between the base substrate and the stack substrate.

15. The system as claimed in claim 11 further comprising a top integrated circuit package over the stack substrate, the entirety of the top integrated circuit package adjacent the stack substrate aperture.

16. The system as claimed in claim 11 wherein the inter-substrate connector is between the base barrier and the base integrated circuit.

17. The system as claimed in claim 16 wherein the stack substrate includes a stack substrate protrusion, the connector underfill over a portion of the stack substrate protrusion.

18. The system as claimed in claim 16 wherein the connector underfill includes an outer edge of the stack substrate substantially intersected by an extent of the connector underfill.

19. The system as claimed in claim 16 wherein the stack substrate includes a stack substrate open region adjacent the stack substrate aperture.

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