Patent ID: 6309914
Filing Date: 2001-10-30
Classification: H01L

Abstract:
A method for making a semiconductor package, comprising the following steps of:attaching a semiconductor chip to a substrate, and then making electrical connection between the semiconductor chip and electrically conductive traces formed on the substrate;placing the substrate with the semiconductor chip on a lower mold of a two piece mold;mounting on the substrate a separator having at least one opening for receiving to the semiconductor chip attached to the substrate, wherein the opening is greater in area than the semiconductor chip so that the semiconductor chip is peripherally surrounded by the boundary of the opening, and wherein the separator is smaller in thickness than the semiconductor chip so that the semiconductor chip is protruded from the opening of the separator subsequent to the mounting of the separator on the substrate;covering an upper mold of the two-piece mold over the lower mold for transferring molding compound through a mold runner and a mold gate connected to a mold cavity formed on the upper mold which interconnects the opening of the separator to allow the semiconductor chip to be received in the mold cavity via the opening of the substrate, into the mold cavity to form an encapsulant enclosing the semiconductor and at least a portion of the surface of the substrate to which the semiconductor chip is attached; andremoving away from the separator excess molding compound solidified in the mold runner and mold gate of the mold, followed by separating the separator from the substrate.