US 12,232,305 B2
Reducing electromagnetic waves using lightweight metal foam
Gigap Han, Chungcheongnam-do (KR); Kaiwen Tseng, Los Altos, CA (US); and Heeman Choe, Conroe, TX (US)
Assigned to CellMo Materials Innovation, Inc., Conroe, TX (US)
Appl. No. 17/907,661
Filed by CellMo Materials Innovation, Inc., Berkeley, CA (US)
PCT Filed Mar. 30, 2021, PCT No. PCT/US2021/024965
§ 371(c)(1), (2) Date Sep. 28, 2022,
PCT Pub. No. WO2021/202586, PCT Pub. Date Oct. 7, 2021.
Claims priority of provisional application 63/003,167, filed on Mar. 31, 2020.
Prior Publication US 2023/0156986 A1, May 18, 2023
Int. Cl. H05K 9/00 (2006.01)
CPC H05K 9/0081 (2013.01) [H05K 9/0049 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A structure comprising:
a metal-foam material containing uniform microscale directional pore structure that effectively shields or reduces electromagnetic waves generated by electronic device due to its enhanced surface area and directional pore structure,
wherein the pore shape is elongational and its elongational axis has an angle of about 20 degrees to about 90 degrees relative to the direction of electromagnetic waves.