Patent ID: 8047044

Claim:
A method of manufacturing a cooling device, comprising: providing a plurality of plates, each plate having two opposed surfaces, a thickness between the opposed surfaces, two opposed lengthwise sides, and two opposed widthwise sides; forming a pattern on a plurality of plates to produce a plurality of patterned plates, wherein the pattern includes a plurality of channels through which liquid can pass, the channels in each plate having a depth less than the thickness of the plate in which the channels are formed, and at least one intermediate barrier having an upper surface coplanar with one of the two opposed flat surfaces of the plate; wherein the channels are formed to extend in a direction from one lengthwise side to the other lengthwise side and at a non-parallel angle to the widthwise sides, wherein each channel is formed with at least one termination at one intermediate barrier or at a sidewall adjacent a widthwise side, and at least one channel is formed with a termination at one intermediate barrier; arranging the plurality of patterned plates in a stack such that the channels of the pattern in a first one of the patterned plates are crosswise with respect to channels in the pattern of a second, adjacent one of said plurality of patterned plates in the stack, with adjacent flat surfaces of the first plate and the second plate abutting, and the crosswise channels in fluid communication at points of intersection between the crosswise channels, and the upper surfaces of the barriers of adjacent plates abutting to separate the flow path into at least two segments along at least a portion of the length of the flow path; and affixing a pair of end plates to the stack, wherein the pair of end plates include an input fluid port and an output fluid port configured to provide fluid flow into and out of the channels from along the lengthwise sides of the plates.