Patent ID: 6849942

Claim:
A semiconductor package with a heat sink, comprising: a substrate having an upper surface and a lower surface opposed to the upper surfaces, wherein an edge of the substrate is formed with a plurality of grooves penetrating through the upper and lower surfaces of the substrate; at least one chip mounted on the upper surface of the substrate and electrically connected to the substrate by a plurality of conductive elements; a heat sink mounted on the upper surface of the substrate and covering the chip, the heat sink having a flat portion and a support portion extending from an edge of the flat portion to the substrate, making the flat portion elevated above the chip by the support portion, wherein the support portion is formed with a flange in contact with the upper surface of the substrate; a plurality of clip members each having a recess portion for receiving the flange of the heat sink and the substrate, and the flange of the heat sink and the substrate are clamped by the clip members such that a death of each of the grooves is larger than a thickness of each of the clip members, so as to firmly position the heat sink on the substrate; and a plurality of solder balls implanted on the lower surface of the substrate.