Patent ID: 7184269

Claim:
A cooling apparatus for an electronics assembly comprising a substrate and at least one heat generating electronics device, the cooling apparatus comprising: an enclosure having a perimeter region for sealably engaging the substrate to form a cavity, the at least one heat generating electronics device being disposed within the cavity defined by the substrate and the enclosure; a heat exchange assembly disposed within the enclosure, the heat exchange assembly defining a primary coolant flow path and a separate, secondary coolant flow path, wherein the primary coolant flow path comprises a first chamber and a second chamber, the first chamber and the second chamber being in fluid communication, and wherein the secondary coolant flow path comprises a third chamber disposed between the first chamber and the second chamber of the primary coolant flow path, and wherein the heat exchange assembly provides a first thermal conduction path between primary coolant in the first chamber of the primary coolant flow path and secondary coolant in the third chamber of the secondary coolant flow path, and a second thermal conduction path between primary coolant in the second chamber of the primary coolant flow path and secondary coolant in the third chamber of the secondary coolant flow path; and wherein the heat exchange assembly further comprises at least one coolant nozzle associated with the first chamber of the primary coolant flow path, the at least one coolant nozzle directing primary coolant towards a surface of the at least one heat generating electronics device.