Patent ID: 7464747

Claim:
A cooling device for heat-generating elements, comprising: a plate member on whose surface a plurality of heat-generating elements are arranged: and a heat sink configured to cool the heat-generating elements; wherein said heat sink comprises: (a) a coolant introduction chamber configured to introduce coolant from a coolant introduction port; (b) at least one coolant contact chamber configured to introduce coolant from said coolant introduction chamber into contact with a back face side of said plate member on whose surface said heat-generating elements are arranged; and (c) a plurality of nozzles formed between said coolant introduction chamber and said coolant contact chamber, wherein the nozzles have mutually identical diameters; wherein an O-ring is arranged in a vicinity of a wall at a periphery of said coolant contact chamber, said O-ring being pressed against said back face side of said plate member on whose surface said plurality of heat-generating elements are arranged.