H - Electricity – 01 – C
Patent
H - Electricity
01
C
H01C 10/30 (2006.01) H01B 1/06 (2006.01) H01B 1/22 (2006.01) H01B 1/24 (2006.01) H01C 1/00 (2006.01) H05K 1/09 (2006.01)
Patent
CA 2085220
2085220 9120088 PCTABS00009 An electrically conductive polymer film (10) composition comprises a polymeric resin, an electrically conductive substance intimately mixed in sufficient quantity with the polymeric resin to render the polymeric resin electrically conductive, and particles (16), such as fibers or spheres of appropriate size, admixed with the polymer composition in sufficient quantity so that in the cured polymer film the particles protrude from the surface (14) of the film and render the surface uneven on a micro scale. The cured polymer film composition of the invention is incorporated in potentiometers and similar electric and electronic devices as a thick film where a contact wiper (18) rides substantially continuously in contact with the protruding fibers. The potentiometers incorporating the thick layer polymer film of the invention have greatly extended useful life, generally extending for several million cycles of movement of the contact wiper on the film.
Bosze Wayne P.
Bourns Inc.
Rogers & Scott
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