Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Patent
1979-05-10
1981-01-27
Kendell, Lorraine T.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
427125, 427123, 427121, 428381, 428389, 428392, 428393, 428394, 428395, 427343, B32B 1500, B05D 512, D02G 300
Patent
active
042475961
ABSTRACT:
Electrical conductors for use in microelectronic circuitry are prepared from a flexible, polymeric fiber selected from the group of flexible, polymeric fibers consisting of silk, polyacrylonitrile, regenerated cellulose, polyester, and polyamide. The selected fiber is made conductive by coating by a method wherein the fiber is immersed for a predetermined time period of from about 30 minutes to about 60 minutes in a solution prepared from equal portions of a silver nitrate-aqueous ammonia solution and a silver nitrate-potassium-sodium tartrate solution. These solutions coat the selected polymeric fiber with metallic silver. The excess solution is washed off and the coated fiber is air dried or dried in a low temperature oven at about 50.degree. C. The process is repeated if a heavier coating of silver on the fibers is desired for better conductivity. For use, the metallic silver coated fiber is cut to required length and tested for resistivity which should be near one ohm. The conductive fiber is positioned in place and secured wih a small amount of electrical conductive epoxy adhesive which is subsequently cured. In cases where a conductor will cross over another conductor it is necessary to insulate these conductors. The insulating can be effected by placing some non-conductive epoxy adhesive between points of contact.
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Hibberd; R. G., "Integrated Circuits", McGraw--Hill Book Company, pp.42-46.
Edelberg Nathan
Gibson Robert P.
Kendell Lorraine T.
Voigt Jack W.
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