Integrated circuit package system with an encapsulant cavity and method of fabrication thereof

1. A method for fabricating an encapsulant cavity integrated circuit package system comprising:

forming a first integrated circuit package with an inverted bottom terminal having an encapsulant cavity and an interposer, the interposer having an integrated circuit electrically connected to and on a top thereof;

attaching a component on the interposer in the encapsulant cavity wherein forming the first integrated circuit package comprises;

mounting a second integrated circuit package on the interposer in the encapsulant cavity;

mounting a third integrated circuit package on a substrate;

attaching a spacer on the third integrated circuit package; and

mounting the first integrated circuit package on the spacer.

2. The method as claimed in claim 1 wherein attaching the component comprises attaching system device packages having surface-mount package technology.

3. The method as claimed in claim 1 wherein attaching the component comprises attaching system devices having chip-scale package technology.

4. A method for fabricating an encapsulant cavity integrated circuit package system comprising:

mounting a first integrated circuit on a first surface of an interposer, the interposer having an integrated circuit electrically connected to and on a top thereof;

molding a first encapsulant over the first integrated circuit forming a first integrated circuit package;

mounting the first integrated circuit package with an inverted bottom terminal over a substrate;

molding a second encapsulant over the first integrated circuit package with the inverted bottom terminal and the substrate forming an encapsulant cavity having a second surface of the interposer substantially exposed; and

mounting a component on the second surface of the interposer in the encapsulant cavity.

5. The method as claimed in claim 4 wherein mounting the component comprises mounting passive devices on the second surface of the interposer in the encapsulant cavity.

6. The method as claimed in claim 4 wherein mounting the component comprises attaching a leaded package on the second surface of the interposer in the encapsulant cavity.

7. The method as claimed in claim 4 wherein mounting the component comprises attaching a leadless package on the second surface of the interposer in the encapsulant cavity.

8. The method as claimed in claim 4 wherein mounting the component comprises:

mounting an optical sensor device on the second surface of the interposer in the encapsulant cavity; and

attaching an optical lid over the optical sensor device and the encapsulant cavity.

9. An encapsulant cavity integrated circuit package system comprising:

a first integrated circuit package with an inverted bottom terminal having an encapsulant cavity and an interposer, the interposer having an integrated circuit electrically connected to and on a top thereof;

a component on the interposer in the encapsulant cavity wherein the first integrated circuit package comprises: a second integrated circuit package on the interposer in the encapsulant cavity; a third integrated circuit package on a substrate; a spacer on the third integrated circuit package; and the first integrated circuit package on the spacer.

10. The system as claimed in claim 9 wherein the component comprises system device packages having surface-mount package technology.

11. The system as claimed in claim 9 wherein the component comprises system devices having chip-scale package technology.

12. The system as claimed in claim 9 wherein the first integrated circuit package includes a first integrated circuit on a first surface of an interposer, and wherein the component is on the second surface of the interposer in the encapsulant cavity; and

further comprising:

a first encapsulant over the first integrated circuit forming a first integrated circuit package;

the first integrated circuit package with an inverted bottom terminal over a substrate; and

a second encapsulant over the first integrated circuit package with the inverted bottom terminal and the substrate forming an encapsulant cavity having a second surface of the interposer substantially exposed.

13. The system as claimed in claim 12 wherein the component comprises passive devices on the second surface of the interposer in the encapsulant cavity.

14. The system as claimed in claim 12 wherein the component comprises a leaded package on the second surface of the interposer in the encapsulant cavity.

15. The system as claimed in claim 12 wherein the component comprises a leadless package on the second surface of the interposer in the encapsulant cavity.

16. The system as claimed in claim 12 wherein the component comprises:

an optical sensor device on the second surface of the interposer in the encapsulant cavity; and

an optical lid over the optical sensor and the encapsulant cavity.