Patent ID: 6869824

Claim:
A fabrication method of a window-type ball grid array semiconductor package, comprising the steps of: (1) preparing a substrate having an upper surface and a lower surface opposed to the upper surface, wherein at least an opening is formed to penetrate through the upper and lower surfaces, and then proceeding to step (2); (2) mounting at least a chip on the upper surface of the substrate via an adhesive, the chip having an active surface and a non-active surface opposed to the active surface, wherein the active surface of the chip covers the opening of the substrate in a manner as to expose a conductive area of the active surface to the opening, and then proceeding to step (3); (3) forming a plurality of bonding wires through the opening of the substrate for electrically connecting the conductive area of the chip to the lower surface of the substrate, and then proceeding to step (4); (4) performing a molding process to form a first encapsulant on the upper surface of the substrate for encapsulating the chip, and then proceeding to step (5); (5) performing a printing process to form a second encapsulant on the lower surface of the substrate for filling the opening and encapsulating the bonding wires, and then proceeding to step (6); and (6) implanting a plurality of solder balls on the lower surface of the substrate at area outside the second encapsulant.