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 |
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.
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