Method of manufacturing an integrated circuit packaging system including lasering through encapsulant over interposer

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

providing a substrate;

mounting an integrated circuit on the substrate;

mounting an interposer substrate having an interposer pad on the integrated circuit;

covering an encapsulant over the integrated circuit and the interposer substrate;

forming a hole through the encapsulant aligned over the interposer pad including lasering through the encapsulant simultaneously at different locations aligned over interposer pads to form holes having different sizes; and

placing a conductive connector on and in direct contact with the interposer pad, a top of the conductive connector laterally spaced away from a side of the hole.

2. The method as claimed in claim 1 wherein mounting the interposer substrate includes mounting the interposer substrate having a top surface area smaller than a top surface area of the integrated circuit.

3. The method as claimed in claim 1 wherein placing the conductive connector on and in direct contact with the interposer pad includes exposing a portion of the conductive connector above the encapsulant.

4. The method as claimed in claim 1 wherein forming the hole includes forming the hole having an opening area with decreasing surface area towards the interposer substrate.

5. The method as claimed in claim 1 wherein forming the hole includes lasing through the encapsulant for exposing the interposer pad or the conductive connector.

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

providing a substrate;

mounting an integrated circuit on the substrate;

mounting an interposer substrate having interposer pads on the integrated circuit;

covering an encapsulant over the integrated circuit and the interposer substrate;

forming holes in the encapsulant aligned over the interposer pads including lasering through the encapsulant simultaneously at different locations aligned over the interposer pads to form the holes having different sizes; and

placing a conductive connector on and in direct contact with the interposer pads, a top of the conductive connector laterally spaced away from a side of the holes.

7. The method as claimed in claim 6 wherein placing the conductive connector includes placing the conductive connector with an interposer pitch between the conductive connector and a further conductive connector immediately adjacent to the conductive connector less than an external pitch between immediately adjacent pairs of external interconnects on the substrate.

8. The method as claimed in claim 6 wherein providing the substrate includes providing the substrate with a central cavity.

9. The method as claimed in claim 6 wherein mounting the interposer substrate includes mounting the interposer substrate on a passive side of the integrated circuit.