| abstract |
A package-on-package (PoP) assembly includes a bottom die package and a top die package mounted on the bottom die package. The bottom die package includes an interposer having a first side and a second side opposite to the first side, at least one chip mounted on the first side within a chip mounting area through a plurality of bumps, a molding compound disposed on the first side, the molding compound covering the at least one chip, and a plurality of peripheral bump structures penetrating through the molding compound within the peripheral area. Each of the peripheral bump structures includes conductive pillar and a partial TMV directly stacked on the conductive pillar. A plurality of solder balls is mounted on the second side of the interposer. The top die package is electrically connected to the peripheral bump structures. |