Patent ID: 6432749
Filing Date: 2002-08-13
Classification: H01L

Abstract:
A method for fabricating a plurality of plastic encapsulated IC packages having embedded heat spreaders incorporated in strip format, including the steps of;a) providing a strip of heat spreaders comprising; a plurality of copper or copper alloy heat spreaders having a first major surface and a second major surface attached to two side rails by an array of reduced cross section pillar connectors, the first of said side rails providing a continuous element about the length of the mold, and the second of said side rails having a series of openings coinciding with the mold press runners, said pillar connectors formed vertically to elevate the individual heat spreader above the plane of said rails, b) positioning in a mold press a polymeric strip having a plurality of patterned IC package substrates with a flip chip connected integrated circuit attached to each substrate, c) positioning a strip of said heat spreaders atop the substrate and chip assemblage, and d) injecting a thermosetting plastic molding compound to fill the mold cavity at each package, and e) removing the molded strip from said mold press and separating each package by severing at the substrate and at the reduced cross section pillar connector.