Electrical conductors arranged in multiple layers and preparatio

Details Electrical conductors arranged in multiple layers and preparatio Electrical conductors arranged in multiple layers and preparatio

1980-12-29

1983-11-22

Smith, John D.

Coating processes

Electrical product produced

Welding electrode

427 96, 427 98, 427123, 427205, 4273855, 427386, 427436, H05K 318, H05K 346

Patent

active

044169140

ABSTRACT:
A low-cost electrical conductor is prepared by applying a mixture of a metallic powder and a polymer on a substrate, curing the polymer, effecting an augmentation replacement reaction to replace some of the metallic powder with a more noble metal in such a way that the total volume of deposited metal at the surface exceeds that of the original metal powder replaced, and thereafter applying a dielectric material to selected areas of the conductor thus formed. Imperfections such as pin holes and screen marks can be eliminated by heating the dielectric material to cause a degree of flow. Multiple layer interconnected conductors can be prepared by reapplying the mixture of metallic powder and polymer such that a portion thereof contacts the first prepared conductor, curing the polymer and effecting an augmentation replacement reaction with a metal which is more noble than the powder metal and the replacement metal of the first conductor.

REFERENCES:
patent: 3332860 (1967-07-01), Diebold et al.
patent: 4163810 (1979-08-01), McGinniss
patent: 4284665 (1981-08-01), Heimala et al.
Bolon et al., "Radiation Curable Conductive Ink", Proceedings of the 13th Electrical/Electronics Insulation Conference, Chicago, Ill., Sep. 25-29, 1977, pp. 108-111.

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