US 12,419,020 B2
Electromagnetic interference shielding materials, devices, and methods of manufacture thereof
Richard B. Kaner, Pacific Palisades, CA (US); Maher F. El-Kady, Los Angeles, CA (US); Jack Kavanaugh, Los Angeles, CA (US); and Scott Laine, Chico, CA (US)
Assigned to Nanotech Energy, Inc., Sunny Isles Beach, FL (US)
Filed by NANOTECH ENERGY, INC., Sunny Isles Beach, FL (US)
Filed on Dec. 8, 2022, as Appl. No. 18/063,524.
Application 18/063,524 is a division of application No. 17/139,804, filed on Dec. 31, 2020, granted, now 11,553,630.
Claims priority of provisional application 62/957,030, filed on Jan. 3, 2020.
Claims priority of provisional application 62/957,035, filed on Jan. 3, 2020.
Prior Publication US 2023/0255011 A1, Aug. 10, 2023
Int. Cl. H05K 9/00 (2006.01); H05K 1/03 (2006.01)
CPC H05K 9/0081 (2013.01) [H05K 1/03 (2013.01); H05K 2201/0707 (2013.01); H05K 2201/10371 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of forming an electromagnetic shield comprising:
(a) forming a coating comprising:
(i) at least about 20% by mass of a conductive additive comprising reduced graphene oxide sheets, graphene oxide sheets, carbon black, and graphite;
(ii) a binder;
(iii) a solvent;
(iv) a surfactant; and
(v) a defoamer;
(b) depositing the coating on a substrate; and
(c) drying the coating on the substrate, thereby forming the electromagnetic shield.