Patent ID: 7726385

Claim:
A heat sink comprising a heat sink modular assembly for improving the transfer of heat from at least one heat source mounted on a common wiring bearing planar support to said heat sink modular assembly radiating into the ambient, wherein said a heat source is a semiconductor chip device on said common wiring bearing planar support, said semiconductor chip device is mounted on said common wiring bearing planar support, forming a combination, said combination comprising an area, said heat sink modular assembly having a plurality of support fin members contiguously aligned side by side, said support fin members being formed from heat conducting material sheets selected from the group consisting of copper, aluminum or graphite fiber composite, said support fin members being in horizontal and vertical alignment with one another and extending along a longitudinal axis, said support fin members being in alignment with said planar support and covering said combination comprising said area; each said support fin member having been formed from a single said heat conducting material sheet and folded into a substantially inverse U shape, each said support fin member having a top surface that extends continuously along said longitudinal axis of said support fin member, and having a first side arm and a second side arm diametrically opposite each other, each said support fin member first side arm and second side arm having an inside surface, an outside surface and an edge, each said edge having a finger portion, each said finger portion comprising a planar surface; a plurality of parallel beam members made from heat conducting material, each said beam member having top, bottom and a first side wall and a second side wall, said first and second side walls of each beam member being positioned between and in contact with said inside surface of said first and second side arms respectively of each said support fin member; said finger portion of said edge extending below said bottom wall of said beam member and at said bottom wall of said beam member being folded inwardly beneath said beam toward a center line of each said beam member into said inwardly folded position to form a contacting support structure for said heat sink, said finger portions folded inwardly beneath said beam forming a compliant interface in contact with said heat source to dissipate heat emanating from said heat source to said heat sink.