Patent ID: 7301234

Claim:
A stack type semiconductor package module comprising: a lower semiconductor package comprising: a lower main substrate; a chip mounted on a first surface of the lower main substrate and electrically connected to the lower main substrate through a wire; an epoxy molding compound (EMC) applied to the first surface of the lower main substrate to cover at least the chip and the wire; a plurality of contact holes formed at predetermined positions of the EMC; and a plurality of solder balls provided at a second surface of the lower main substrate; a sub-substrate having a plurality of protrusions formed on a second surface at positions corresponding to the positions of the contact holes formed in the EMC, wherein the each of the protrusions is inserted into respective one of the contact holes formed in the EMC of the lower semiconductor package and is electrically connected to the lower semiconductor package by solder formed in the contact hole; and an upper semiconductor package stacked on a first surface of the sub-substrate and having a structure identical to that of the lower semiconductor package.