Patent ID: 8981577
Filing Date: 2015-03-17
Classification: H01L

Abstract:
1. A method of manufacture of an integrated circuit packaging system comprising: providing an interposer having an interposer first side and an interposer second side opposing the interposer first side; mounting an integrated circuit to the interposer first side, the integrated circuit having a non-active side and an active side with the non-active side facing the interposer; connecting first interconnects between the active side and the interposer first side, the first interconnects are connected to integrated circuit pads and have a first density on the interposer first side, the integrated circuit pads have a pad pitch; mounting the interposer over a package carrier with the interposer first side facing the package carrier; connecting second interconnects between the package carrier and the interposer second side, the second interconnects having a second density on the interposer second side, the second density is approximately the same as the first density; mounting an integrated circuit interconnect over the package carrier, the integrated circuit interconnect has a bump pitch, the pad pitch is three to four times tighter than the bump pitch, the integrated circuit has a higher input/output (I/O) density than that of the integrated circuit interconnect; connecting the integrated circuit interconnect between the active side of the integrated circuit and the package carrier to provide a shorter electrical signal path between the integrated circuit and the package carrier than the first interconnects and the second interconnects; and forming an encapsulation over the package carrier covering the interposer and the second interconnects.