Integrated circuit packaging system with heat shield and method of manufacture thereof

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

mounting a device mounting structure over a bottom substrate;

mounting a heat spreader having an opening formed by a single integral structure with a dam and a flange, the dam having a dam height greater than a flange height of the flange; and

forming a package encapsulation over the device mounting structure and the bottom substrate and under the heat spreader with the device mounting structure exposed within the opening, the package encapsulation in contact with the dam only on a dam outer side of the dam, the package encapsulation in contact with the flange only on a flange bottom side, a side of the package encapsulation coplanar with a perimeter edge of the heat spreader.

2. The method as claimed in claim 1 wherein mounting the heat spreader includes mounting the heat spreader having the opening bounded by the dam, the dam having a dam width less than a flange width of the flange.

3. The method as claimed in claim 1 wherein mounting the heat spreader includes mounting the heat spreader over a connection side of the device mounting structure with the connection side exposed within the opening of the heat spreader.

4. The method as claimed in claim 1 further comprising:

mounting the device mounting structure over the bottom substrate; and

wherein:

mounting the heat spreader includes mounting the heat spreader having the opening with an opening center offset from a device mounting structure center of the device mounting structure.

5. The method as claimed in claim 1 further comprising mounting an inner integrated circuit over the bottom substrate.

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

mounting an inner integrated circuit over a bottom substrate;

mounting a device mounting structure over the bottom substrate, the device mounting structure over the inner integrated circuit;

mounting a heat spreader having an opening bounded by a single integral structure with a dam and a flange, the dam having a dam height greater than a flange height of the flange; and

forming a package encapsulation over the device mounting structure and the bottom substrate and under the heat spreader with the device mounting structure exposed within the opening, the package encapsulation in contact with the dam only on a dam outer side of the dam, the package encapsulation in contact with the flange only on a flange bottom side, a side of the package encapsulation coplanar with a perimeter edge of the heat spreader.

7. The method as claimed in claim 6 wherein mounting the inner integrated circuit includes mounting the inner integrated circuit on the bottom substrate.

8. The method as claimed in claim 6 further comprising mounting a wire-in-film adhesive on the inner integrated circuit.

9. The method as claimed in claim 6 further comprising:

mounting a redistribution layer on the device mounting structure; and

wherein:

mounting the heat spreader includes mounting the heat spreader with the redistribution layer exposed within the opening.

10. The method as claimed in claim 6 further comprising:

mounting an inner package having the device mounting structure over the bottom substrate; and

wherein:

mounting the heat spreader includes mounting the heat spreader over the inner package with a connection side of the device mounting structure exposed within the opening.

11. An integrated circuit packaging system comprising:

a device mounting structure over a bottom substrate;

a heat spreader having an opening formed by a single integral structure with a dam and a flange, the dam having a dam height greater than a flange height of the flange; and

a package encapsulation over the device mounting structure and the bottom substrate and under the heat spreader with the device mounting structure exposed within the opening, the package encapsulation in contact with the dam only on a dam outer side of the dam, the package encapsulation in contact with the flange only on a flange bottom side, a side of the package encapsulation coplanar with a perimeter edge of the heat spreader.

12. The system as claimed in claim 11 wherein the heat spreader includes the heat spreader having the opening bounded by the dam, the dam having a dam width less than a flange width of the flange.

13. The system as claimed in claim 11 wherein the heat spreader includes the heat spreader over a connection side of the device mounting structure with the connection side exposed within the opening of the heat spreader.

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

the device mounting structure over the bottom substrate; and

wherein:

the heat spreader includes the heat spreader having the opening with an opening center offset from a device mounting structure center of the device mounting structure.

15. The system as claimed in claim 11 further comprising an inner integrated circuit over the bottom substrate.

16. The system as claimed in claim 11 wherein the heat spreader includes the heat spreader having the opening bounded by the single integral structure with the dam and the flange, the dam having the dam width greater than the flange height of the flange;

further comprising:

an inner integrated circuit mounted over the bottom substrate and under the device mounting structure.

17. The system as claimed in claim 16 wherein the inner integrated circuit is mounted on the bottom substrate.

18. The system as claimed in claim 16 further comprising a wire-in-film adhesive on the inner integrated circuit.

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

a redistribution layer on the device mounting structure; and

wherein:

the heat spreader includes the heat spreader having the opening exposing the redistribution layer.

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

an inner package having the device mounting structure over the bottom substrate; and

wherein:

the heat spreader includes the heat spreader over the inner package with a connection side of the device mounting structure exposed within the opening.