Patent ID: 7331378
Filing Date: 2008-02-19
Classification: F28F,H01L

Abstract:
1. A heat sink for transferring heat from a heat source to a coolant fluid comprising; a housing including a flat base defining a cold plate having parallel micro-channels all extending the same distance and each having a base-width and a base-height into said cold plate, a manifold plate having a top face and a bottom face to define a manifold-thickness with said bottom face overlying said micro-channels and having spaced edges extending between opposite ends, said housing presenting a interior shoulder engaging said ends of said manifold plate to define a recessed surface in engagement with said top face of said manifold plate, said edges of said manifold plate defining an inlet edge and an outlet edge each spaced from said shoulder to define an inlet plenum between said inlet edge and said shoulder and an outlet plenum between said outlet edge and said shoulder, said manifold plate presenting inlet manifold channels extending into said inlet edge and outlet manifold channels extending into said outlet edge with each manifold channel terminating in spaced relationship to the opposite edge, said inlet manifold channels alternating with said outlet manifold channels to define a wall-thickness of the underlying micro-channel so that manifold channels from said inlet edge are interleaved with manifold channels from said outlet edge with said manifold channels having a manifold-width and a manifold-height equal to said manifold-thickness, said manifold channels extending transversely across said micro-channels in said base whereby coolant flows from said inlet conduit and into said inlet plenum and into said inlet manifold channels where the flow is forced downward into said micro-channels where the coolant is re-directed up into said outlet manifold channels and out into said outlet plenum for exit out of said outlet conduit to convey heat from a heat source engaging the exterior of said base, said base-width of said micro-channels being in the range of forty (40) microns to one hundred (100) microns, said base-height into said base of said micro-channels being in the range of two hundred (200) microns to four hundred (400) microns, said manifold-height through said manifold-thickness of said manifold channels being in the range of one thousand (1000) microns to three thousand (3000) microns, and said manifold-width of said manifold channels in the range of three hundred and fifty (350) microns to one thousand (1000) microns.