Patent ID: 6870274

Claim:
A window ball grid array (WBGA) semiconductor package, comprising: a core layer having a first surface and an opposite second surface, and a through hole penetrating through the core layer, wherein the second surface is formed with a plurality of wire-bonding portions around the through hole, a plurality of ball-bonding portions, and a plurality of intended-exposing regions around the wire-bonding portions; at least one chip mounted on the first surface of the core layer and over the through hole, with a portion of the chip exposed via the through hole; a solder mask layer applied over the second surface of the core layer with the ball-bonding portions being exposed, wherein the solder mask layer is formed with an opening for exposing the through hole, the wire-bonding portions, and the intended-exposing regions; a plurality of bonding wires which penetrate through the through hole and electrically connect the chip to the wire-bonding portions; a first encapsulation body formed on the first surface of the core layer for encapsulating the chip; a second encapsulation body formed on the second surface of the core layer for encapsulating the bonding wires and the intended-exposing regions, wherein a thickness of the second encapsulation body covering the intended-exposing regions is substantially equal to that of the solder mask layer; and a plurality of solder balls deposited on the ball-bonding portions.