Patent ID: 6933175
Filing Date: 2005-08-23
Classification: H01L

Abstract:
1. A method for fabricating an integrated circuit package, comprising the steps of: (1) preparing a substrate having a front surface and a back surface, and which is predefined with a plurality of package sites; (2) preparing a heat-spreader frame including a plurality of integrally-formed heat spreaders having a front surface and a back surface, each heat spreader corresponding to one of the predefined package sites on the substrate, wherein the heat-spreader frame is a legged type having a plurality of legs that extend from peripheral edges of the back surface of the heat-spreader frame, the heat-spreader frame being flatly shaped both in the front surface and in the back surface thereof; (3) bonding and electrically-coupling a plurality of semiconductor chips to respective package sites on the front surface of the substrate; (4) assembling the heat-spreader frame to the substrate in such a manner that each heat spreader is positioned proximate to one of the semiconductor chips on the substrate, wherein the heat spreaders are elevated above the semiconductor chips by the legs that are situated at the peripheral edges of the heat-spreader frame and abut against the substrate; (5) performing an encapsulation process to form an encapsulation body which completely encapsulates the semiconductor chips and completely covers the back surface of the heat-spreader frame; (6) performing a ball-implantation process to implant a plurality of solder balls on the back surface of the substrate; and (7) singulating through the encapsulation body to cut apart the plurality of package sites on the substrate and the plurality of integrally-formed heat spreaders and to cut away the legs situated at the peripheral edges of the heat-spreader frame, so as to form a plurality of individual integrated circuit packages without having the legs of the heat-spreader frame in the packages.