Patent ID: 8218320

Claim:
A heat sink for cooling at least one electronic device package, the electronic device package having an upper contact surface and a lower contact surface, the heat sink comprising: a lower lid formed of at least one thermally conductive material an upper lid formed of at least one thermally conductive material; and a body formed of at least one thermally conductive material, wherein the body is disposed between and sealed to the lower and upper lids, and wherein the body defines: a tapered inlet distribution chamber configured to receive a coolant, a plurality of C-shaped inlet manifolds configured to receive the coolant from the tapered inlet distribution chamber, a plurality of inverted C-shaped outlet manifolds configured to exhaust the coolant, wherein the C-shaped inlet and inverted C-shaped outlet manifolds are interleaved and are disposed in a circular arrangement, and wherein the inverted C-shaped outlet manifolds extend around only a portion of the body and terminate adjacent to opposing sides of the tapered inlet chamber, and a tapered outlet chamber configured to receive the coolant from the inverted C-shaped outlet manifolds, wherein the C-shaped inlet manifolds extend around only a portion of the body and terminate adjacent to opposing sides of the tapered outlet chamber, and wherein a plurality of millichannels are formed in one or both of (a) the body and (b) at least one of the lower and upper lids and are configured to receive the coolant from the C-shaped inlet manifolds and to deliver the coolant to the inverted C-shaped outlet manifolds, wherein the millichannels are disposed in a radial arrangement, and wherein the millichannels and the C-shaped inlet and inverted C-shaped outlet manifolds are further configured to cool one of the upper and lower contact surfaces of the electronic device package.