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

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

providing a package substrate;

mounting an integrated circuit die on the package substrate; and

attaching a heat spreader assembly to the package substrate and the integrated circuit die, the heat spreader assembly having a thermal adhesive layer extending from the package substrate to a back side of the integrated circuit die and contacting only the package substrate and only the back side of the integrated circuit die.

2. The method as claimed in claim 1 wherein attaching the heat spreader assembly includes deforming an inner surface of the thermal adhesive layer by the integrated circuit die.

3. The method as claimed in claim 1 further comprising applying a sealant between the package substrate and the integrated circuit die.

4. The method as claimed in claim 1 wherein attaching the heat spreader assembly includes:

providing a heat spreader;

applying a thermally conductive liquid on an entire inner area of the heat spreader for forming the thermal adhesive layer; and

pressing a pre-determined thickness of the thermal adhesive layer on the package substrate and the integrated circuit die.

5. The method as claimed in claim 1 wherein attaching the heat spreader assembly includes:

providing a pick and place probe for positioning the heat spreader over the package substrate; and

providing a heat block for elevating the temperature of the package substrate and the thermal adhesive layer while pressing the heat spreader assembly on the package substrate and the integrated circuit die.

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

providing a package substrate having a component side and a system side;

mounting an integrated circuit die on the component side of the package substrate; and

attaching a heat spreader assembly to the component side of the package substrate and the integrated circuit die, the heat spreader assembly having a thermal adhesive layer extending from the package substrate to a back side of the integrated circuit die and contacting only the package substrate and only the back side of the integrated circuit die.

7. The method as claimed in claim 6 wherein attaching the heat spreader assembly includes deforming an inner surface of the thermal adhesive layer by the integrated circuit die including the back side of the integrated circuit die deforming the inner surface.

8. The method as claimed in claim 6 further comprising applying a sealant between the package substrate and the integrated circuit die including encasing a chip interconnect by the sealant.

9. The method as claimed in claim 6 wherein attaching the heat spreader assembly includes:

providing a heat spreader including forming the heat spreader of a metal or an alloy;

applying a thermally conductive liquid on an entire inner area of the heat spreader for forming the thermal adhesive layer including applying a thermally conductive dielectric material or a B-stage material; and

pressing a pre-determined thickness of the thermal adhesive layer on the package substrate and the integrated circuit die including completely contacting the back side of the integrated circuit die.

10. The method as claimed in claim 6 wherein attaching the heat spreader assembly includes:

providing a pick and place probe for positioning the heat spreader over the package substrate including optically aligning the heat spreader assembly to the package substrate; and

providing a heat block for elevating the temperature of the package substrate and the thermal adhesive layer while pressing the heat spreader assembly on the package substrate and the integrated circuit die including increasing the viscosity of the thermal adhesive layer on the integrated circuit die for 1 to 2 seconds.

11. An integrated circuit packaging system comprising:

a package substrate;

an integrated circuit die mounted on the package substrate; and

a heat spreader assembly attached to the package substrate and the integrated circuit die, the heat spreader assembly having a thermal adhesive layer extending from the package substrate to a back side of the integrated circuit die and contacting only the package substrate and only the back side of the integrated circuit die.

12. The system as claimed in claim 11 wherein the heat spreader assembly includes an inner surface of the thermal adhesive layer deformed by the integrated circuit die.

13. The system as claimed in claim 11 further comprising a sealant between the package substrate and the integrated circuit die.

14. The system as claimed in claim 11 wherein the heat spreader assembly includes:

a heat spreader;

a thermally conductive liquid applied on an entire inner area of the heat spreader for forming the thermal adhesive layer; and

a pre-determined thickness of the thermal adhesive layer on the package substrate and the integrated circuit die.

15. The system as claimed in claim 11 wherein the heat spreader assembly is a radio frequency shield attached to the package substrate.

16. The system as claimed in claim 11 wherein the package substrate includes:

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

a component contact on the component side of the package substrate coupled to the integrated circuit die;

a system contact on the system side of the package substrate; and

a via coupled to the system contact and the component contact.

17. The system as claimed in claim 16 wherein the heat spreader assembly includes an inner surface of the thermal adhesive layer deformed by the integrated circuit die including the back side of the integrated circuit die on the inner surface.

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

a sealant between the package substrate and the integrated circuit die; and

a chip interconnect encased by the sealant.

19. The system as claimed in claim 16 wherein the heat spreader assembly includes:

a heat spreader includes a metal or an alloy to form the heat spreader;

a thermally conductive liquid on an entire inner area of the heat spreader forms the thermal adhesive layer includes a thermally conductive dielectric material or a B-stage material applied; and

a pre-determined thickness of the thermal adhesive layer pressed on the package substrate and the integrated circuit die includes the back side of the integrated circuit die completely contacted.

20. The system as claimed in claim 16 wherein:

the heat spreader assembly is a radio frequency shield attached to the package substrate; and

further comprising:

a system interconnect on the system contact electrically connected to the heat spreader through the thermal adhesive layer.