Patent ID: 7441591

Claim:
A heatsink, comprising: a cooling zone to contact an object to be frozen and having microchannels formed therein to define a plurality of fluid pathways; an inlet through which a working fluid enters; a distributor, interposed between the inlet and the cooling zone, to uniformly distribute the working fluid introduced through the inlet to the microchannels; an outlet through which the working fluid, passing through the cooling zone, exits; and a collector, interposed between the cooling zone and the outlet, to collect the working fluid passing through the microchannels; wherein a width of the distributor gradually increases from an end of the inlet to a beginning of the cooling zone, and a width of the collector gradually decreases from an end of the cooling zone to a beginning of the outlet, and wherein a length of the distributor is given by the relationship, L = D e - D 2 · tan ⁢ ⁢ θ where L denotes the length of the distributor, D e denotes a maximum width of the distributor, D denotes a minimum width of the distributor, and θ denotes an inclination angle of the distributor relative to longitudinal lengths of the inlet and the outlet.