Integrated circuit package system with input/output expansion

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

forming a base stacking package including:

fabricating a base substrate,

mounting an integrated circuit on the base substrate, the integrated circuit directly connected electrically to the base substrate,

positioning an input/output expansion substrate, having access ports around an inner array area, over the integrated circuit, and

injecting a molding compound on the base substrate, the integrated circuit, and the input/output expansion substrate; and

mounting a top package on the input/output expansion substrate.

2. The method as claimed in claim 1 further comprising providing a recessed step on the access ports in the input/output expansion substrate.

3. The method as claimed in claim 1 further comprising mounting a second integrated circuit between the base substrate and the input/output expansion substrate.

4. The method as claimed in claim 1 further comprising coupling an interposer interconnect between the base substrate and the input/output expansion substrate.

5. The method as claimed in claim 1 wherein positioning the input/output expansion substrate including mounting an internal stacking module over the integrated circuit.

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

forming a base stacking package including:

fabricating a base substrate having a system side and a component side,

mounting an integrated circuit on the base substrate including coupling an electrical interconnect, a chip interconnect, or a combination thereof for electrically connecting the integrated circuit directly to the base substrate,

positioning an input/output expansion substrate, having access ports around an inner array area, over the integrated circuit including applying an adhesive between the integrated circuit and the input/output expansion substrate, and

injecting a molding compound on the base substrate, the integrated circuit, and the input/output expansion substrate including encapsulating the electrical interconnect, the chip interconnect, or the combination thereof; and

mounting a top package on the input/output expansion substrate including coupling a top package integrated circuit to the integrated circuit, a system interconnect on the system side of the base substrate, or a combination thereof through the input/output expansion substrate.

7. The method as claimed in claim 6 further comprising providing a recessed step on the access ports in the input/output expansion substrate including forming a bonding contact thereon.

8. The method as claimed in claim 6 further comprising mounting a second integrated circuit between the base substrate and the input/output expansion substrate including coupling a recessed step to the integrated circuit, the second integrated circuit, the component side of the base substrate, or a combination thereof.

9. The method as claimed in claim 6 further comprising coupling an interposer interconnect between the base substrate and the input/output expansion substrate including mounting a discrete component on the input/output expansion substrate for conditioning a signal between the base substrate and the input/output expansion substrate.

10. The method as claimed in claim 6 wherein positioning the input/output expansion substrate including mounting an internal stacking module over the integrated circuit including mounting an internal stacking module package body on the integrated circuit by the adhesive.

11. An integrated circuit package system including:

a base stacking package including:

a base substrate,

an integrated circuit on the base substrate, the integrated circuit directly connected electrically to the base substrate,

an input/output expansion substrate, with access ports around an inner array area, over the integrated circuit, and

a molding compound on the base substrate, the integrated circuit, and the input/output expansion substrate; and

a top package on the input/output expansion substrate.

12. The system as claimed in claim 11 further comprising a recessed step on the access ports in the input/output expansion substrate.

13. The system as claimed in claim 11 further comprising a second integrated circuit between the base substrate and the input/output expansion substrate.

14. The system as claimed in claim 11 further comprising an interposer interconnect between the base substrate and the input/output expansion substrate.

15. The system as claimed in claim 11 wherein the input/output expansion substrate includes an internal stacking module over the integrated circuit.

16. The system as claimed in claim 11 further comprising:

a system side and a component side on the base substrate;

an electrical interconnect, a chip interconnect, or a combination thereof between the integrated circuit and the base substrate;

an adhesive between the integrated circuit and the input/output expansion substrate; and

a mold cap formed on the input/output expansion substrate.

17. The system as claimed in claim 16 further comprising a recessed step on the access ports in the input/output expansion substrate includes a bonding contact thereon.

18. The system as claimed in claim 16 further comprising a second integrated circuit between the base substrate and the input/output expansion substrate includes a recessed step having the bonding contact coupled to the integrated circuit, the second integrated circuit, component side of the base substrate, or a combination thereof.

19. The system as claimed in claim 16 further comprising an interposer interconnect between the base substrate and the input/output expansion substrate includes a discrete component on the input/output expansion substrate for conditioning a signal between the base substrate and the input/output expansion substrate.

20. The system as claimed in claim 16 wherein the input/output expansion substrate over the integrated circuit includes an internal stacking module over the integrated circuit with an internal stacking module package body mounted on the integrated circuit by the adhesive.