US 11,940,233 B2
Graphene and carbon nanotube based thermal management device
M. Baris Dogruoz, Campbell, CA (US); Mehmet Onder Cap, Sunnyvale, CA (US); D. Brice Achkir, Livermore, CA (US); and Joel Richard Goergen, Soulsbyville, CA (US)
Assigned to CISCO TECHNOLOGY, INC., San Jose, CA (US)
Filed by CISCO TECHNOLOGY, INC., San Jose, CA (US)
Filed on Jan. 21, 2021, as Appl. No. 17/154,785.
Prior Publication US 2022/0228820 A1, Jul. 21, 2022
Int. Cl. F28F 21/02 (2006.01); F28D 21/00 (2006.01); F28F 3/04 (2006.01)
CPC F28F 21/02 (2013.01) [F28D 21/00 (2013.01); F28F 3/04 (2013.01); F28D 2021/0029 (2013.01); F28F 2280/06 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A thermal management device comprising:
a heat sink base; and
heat sink fins;
wherein the heat sink base and heat sink fins comprise a single element formed from a plurality of graphene layers with carbon nanotubes interposed between the plurality of graphene layers, wherein a first carbon nanotube of the carbon nanotubes is interposed between a first graphene layer of the plurality of graphene layers and a second graphene layer of the plurality of graphene layers, a second carbon nanotube of the carbon nanotubes and a third carbon nanotube of the carbon nanotubes are interposed between the second graphene layer and a third graphene layer, and the first carbon nanotube is offset from the second carbon nanotube such that a first portion of the first carbon nanotube is positioned above the second carbon nanotube and a second portion of the first carbon nanotube is positioned above an area between the second carbon nanotube and the third carbon nanotube.