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

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

providing a bottom substrate;

attaching a first integrated circuit die to the bottom substrate;

forming an interposer including:

providing an intermediate substrate, the intermediate substrate is a step-down substrate,

depositing a shield directly on the intermediate substrate, the shield is connectible through the intermediate substrate to a ground and the shield is a conductive paste of inductive material for forming an electromagnetic interference and noise suppression structure, and

applying an adhesive to the shield;

attaching the interposer to the first integrated circuit die with the adhesive;

molding a first encapsulation over the interposer, the first encapsulation completely covering vertical sides of the step-down substrate;

forming contact pads on the interposer;

providing an upper substrate having a top surface and a bottom surface;

attaching a second integrated circuit die to the top surface of the upper substrate;

forming interconnects on the bottom surface of the upper substrate;

attaching the upper substrate to the interposer such that the interconnects and the contact pads form electrical connections; and

molding a second encapsulation over the upper substrate, the second encapsulation covering the second integrated circuit die.

2. The method as claimed in claim 1 wherein providing the bottom substrate includes providing the bottom substrate having a top contact pad on a top surface of the bottom substrate, and a bottom contact pad on a bottom surface of the bottom substrate; and further comprising:

forming an external interconnect on the bottom contact pad of the bottom substrate.

3. The method as claimed in claim 1 wherein forming the interposer includes:

forming a ground contact pad on a top surface of the intermediate substrate;

forming a via connected to the ground contact pad; and

forming the shield on the intermediate substrate and the via.

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

connecting with a bond wire the interposer and the bottom substrate.

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

providing a bottom substrate;

attaching a first integrated circuit die to the bottom substrate;

forming an interposer including:

providing an intermediate substrate, the intermediate substrate is a step-down substrate,

depositing a shield directly on the intermediate substrate, the shield is connectible through the intermediate substrate to a ground and the shield is a conductive paste of inductive material for forming an electromagnetic interference and noise suppression structure, and

applying an adhesive to the shield;

attaching the interposer to the first integrated circuit die with the adhesive;

connecting the interposer and the bottom substrate with a first bond wire;

mounting a second integrated circuit die over the interposer;

molding an encapsulation over the interposer, the encapsulation completely covering vertical sides of the step-down substrate;

mounting a second integrated circuit die over the interposer; and

connecting the second integrated circuit die and the interposer with a second bond wire.

6. The method as claimed in claim 5 wherein attaching the first integrated circuit die includes attaching with a die attach adhesive the first integrated circuit die to the bottom substrate.

7. The method as claimed in claim 5 wherein providing the intermediate substrate includes forming the intermediate substrate with an embedded die in the intermediate substrate.

8. The method as claimed in claim 5 wherein providing the intermediate substrate includes forming a redistribution layer on the intermediate substrate.

9. The method as claimed in claim 5 wherein molding the encapsulation includes molding the encapsulation over the first integrated circuit die, and a top surface of the bottom substrate.

10. An integrated circuit packaging system comprising:

a bottom substrate;

a first integrated circuit die attached to the bottom substrate;

an interposer mounted on the first integrated circuit die with an adhesive, the interposer having an intermediate substrate, the intermediate substrate is a step-down substrate, a shield directly on the intermediate substrate, the shield is connectible through the intermediate substrate to a ground and the shield is a conductive paste of inductive material for forming an electromagnetic interference and noise suppression structure, and the adhesive between the first integrated circuit die and the shield;

a first encapsulation over the interposer, the first encapsulation completely covering vertical sides of the step-down substrate;

contact pads formed on the interposer;

an upper substrate having a top surface and a bottom surface;

a second integrated circuit die attached to the top surface of the upper substrate;

interconnects formed on the bottom surface of the upper substrate, wherein the upper substrate is coupled to the interposer such that the interconnects and the contact pads form electrical connections; and

a second encapsulation over the upper substrate, the second encapsulation covering the second integrated circuit die.

11. The system as claimed in claim 10 wherein the bottom substrate includes:

a top contact pad on a top surface of the bottom substrate;

a bottom contact pad on a bottom surface of the bottom substrate; and further comprising:

an external interconnect on the bottom contact pad of the bottom substrate.

12. The system as claimed in claim 10 wherein the interposer includes:

a ground contact pad on a top surface of the intermediate substrate; and

a via connecting the ground contact pad and the shield.

13. The system as claimed in claim 10 further comprising a bond wire between the interposer and the bottom substrate.

14. The system as claimed in claim 10 further comprising:

an external interconnect on the bottom contact pad of the bottom substrate.

15. The system as claimed in claim 14 further comprising a die attach adhesive on and between the first integrated circuit die and the bottom substrate.

16. The system as claimed in claim 14 wherein the intermediate substrate includes an embedded die in the intermediate substrate.

17. The system as claimed in claim 14 wherein the intermediate substrate includes a redistribution layer.

18. The system as claimed in claim 14 wherein the first encapsulation is on the first integrated circuit die, and the top surface of the bottom substrate.