Patent ID: 7057276

Claim:
A semiconductor package with a heat sink, comprising: a substrate having a top surface and an opposite bottom surface; at least one chip disposed on the top surface of the substrate and electrically connected to the substrate via a plurality of conductive elements; a heat sink mounted on the top surface of the substrate and connected to the chip, wherein the heat sink has a top surface and an opposite bottom surface and comprises a flat portion attached to the chip, a support portion extending from an edge of the flat portion to the substrate, and a bonding portion extending laterally from an end of the support portion and connected to the substrate, allowing the flat portion to be supported and elevated above the chip by the support portion, and allowing the bonding portion to be attached to the top surface of the substrate, with at least one slot formed through at least one corner of the bonding portion to expose the top surface of the substrate, the slot comprising a through hole penetrating the top and bottom surfaces of the bonding portion of the heat sink, and the slot having at least one of a taper structure and a bent inner wall; an adhesive material applied between the bonding portion of the heat sink and the top surface of the substrate and filled in the slot through the corner of the bonding portion with an overflow of the adhesive material out of the slot, so as to attach the heat sink to the substrate by means of the adhesive material; and a plurality of solder balls mounted on the bottom surface of the substrate.