Ball grid array package comprising a heat sink

摘要

A semiconductor package comprises a semiconductor chip and a printed circuit board. The printed circuit board comprises a board body. An upper wiring layer is formed on the upper surface of the board body and includes a chip-mounting portion for mounting the semiconductor chip, board pads formed around the chip-mounting portion and electrically connected to said semiconductor chip, and an upper heat dissipation layer around said chip-mounting portion. Further, a lower wiring layer including a lower heat dissipation layer is formed on the lower surface of the board body. First heat-dissipating via holes are formed through the board body between the chip-mounting portion and the lower heat dissipation layer and are filled with a thermally conductive material for dissipating heat from the chip through the board body to the lower wiring layer. Second heat-dissipating via holes are formed through the board body below said upper heat dissipation layer and are filled with a thermally conductive material for dissipating heat generated from the chip through the board body to the upper heat dissipation layer.