US 6,982,378 B2
Lossy coating for reducing electromagnetic emissions
Andrew H. Dickson, Fair Oaks, Calif. (US)
Assigned to Hewlett-Packard Development Company, L.P., Houston, Tex. (US)
Filed on Mar. 07, 2003, as Appl. No. 10/383,387.
Prior Publication US 2004/0173368 A1, Sep. 09, 2004
Int. Cl. H05K 9/00 (2006.01)
U.S. Cl. 174—36 18 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a conductor; and
a lossy coating encasing the conductor and comprising a plurality of lossy layers in separate sheaths in adjacent layers, the plurality of lossy layers further comprising:
a binder; and
a lossy material mixed into the binder, the lossy material being selected to attenuate electromagnetic interference frequencies in a narrow or moderate band,
individual lossy layers of the plurality of lossy layers having different compositions selected to attenuate frequencies in different frequency bands.