US 11,864,347 B2
Heat sink assemblies for transient cooling
Michel Engelhardt, Woodbury, NY (US); Paul Otto Stehlik, Northport, NY (US); and Judd Everett Swanson, Cooper City, FL (US)
Assigned to GE Aviation Systems LLC, Grand Rapids, MI (US)
Filed by GE AVIATION SYSTEMS LLC, Grand Rapids, MI (US)
Filed on Oct. 15, 2019, as Appl. No. 16/653,256.
Application 16/653,256 is a continuation of application No. 15/526,475, granted, now 10,485,138, previously published as PCT/US2015/060441, filed on Nov. 12, 2015.
Claims priority of provisional application 62/078,620, filed on Nov. 12, 2014.
Prior Publication US 2020/0053908 A1, Feb. 13, 2020
Int. Cl. H01L 23/427 (2006.01); H05K 7/20 (2006.01)
CPC H05K 7/2029 (2013.01) [H01L 23/4275 (2013.01); H05K 7/20509 (2013.01); H01L 2924/0002 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A heat sink assembly for use with at least one heat-emitting component, comprising:
a first phase change material conductively coupled to the at least one heat-emitting component and changing phase at a first temperature;
a first frame defining a first number of first chambers formed by first walls extending from a first side;
the first phase change material disposed in the first chambers;
a second frame defining a second number of second chambers formed by second walls extending from a second side facing the first side, wherein the second number is different from the first number;
a second phase change material disposed in the second chambers, conductively coupled to the first phase change material and changing phase at a second temperature, which is greater than the first temperature; and
a separate intermediate structure located between the first frame and the second frame wherein the intermediate structure is an intermediate heat-conducting structure comprising a plate and a first set of fins cantilevered from the plate extending in a first direction into respective ones of the first chambers, and a second set of fins cantilevered from the plate and extending in a second direction into respective ones of the second chambers, the first direction being opposite the second direction;
wherein the first phase change material changes phase in response to a conductive transfer of heat from the at least one heat-emitting component and the second phase change material changes phase in response to a conductive transfer of heat from the first phase change material.