US 12,009,283 B2
Methods and systems for evaporation of liquid from droplet confined on hollow pillar
Damena Agonafer, St. Louis, MO (US); Binjian Ma, St. Louis, MO (US); Li Shan, St. Louis, MO (US); Patricia Weisensee, St. Louis, MO (US); and John Mark Meacham, St. Louis, MO (US)
Assigned to Washington University, St. Louis, MO (US)
Appl. No. 17/267,539
Filed by Washington University, St. Louis, MO (US)
PCT Filed Aug. 23, 2019, PCT No. PCT/US2019/047982
§ 371(c)(1), (2) Date Feb. 10, 2021,
PCT Pub. No. WO2020/041749, PCT Pub. Date Feb. 27, 2020.
Claims priority of provisional application 62/863,055, filed on Jun. 18, 2019.
Claims priority of provisional application 62/826,293, filed on Mar. 29, 2019.
Claims priority of provisional application 62/722,469, filed on Aug. 24, 2018.
Prior Publication US 2021/0313247 A1, Oct. 7, 2021
Int. Cl. H01L 23/427 (2006.01); H05K 7/20 (2006.01); H01L 23/373 (2006.01); H01L 25/065 (2023.01)
CPC H01L 23/427 (2013.01) [H01L 23/3735 (2013.01); H01L 25/0655 (2013.01); H05K 7/20318 (2013.01); H05K 7/20327 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A heat exchanger for thermal management of an electronic device, the heat exchanger comprising:
a liquid delivery layer thermally coupled to the electronic device and configured to receive a liquid from a source; and
an evaporation layer comprising hollow pillars configured to receive a continuous flow of the liquid from the liquid delivery layer and evaporate the continuous flow of the liquid from droplets maintained on the hollow pillars, wherein each of the hollow pillars has an evaporation surface and a pore, the pore is configured to channel the continuous flow of the liquid through q respective one of the hollow pillars to the evaporation surface, the evaporation surface being configured to maintain a corresponding one of the droplets on the respective one of hollow pillars within a contact line, wherein the evaporation surface has a wetting efficiency of at least 95% and the contact line has a length of less than 0.0314 mm,
wherein the heat exchanger has a stacked configuration in which the liquid delivery laver is positioned between the evaporation laver and the electronic device.