Selective coating of metallurgical features of a dielectric subs

Details Selective coating of metallurgical features of a dielectric subs Selective coating of metallurgical features of a dielectric subs

1982-03-18

1985-01-15

Lawrence, Evan K.

Coating processes

Electrical product produced

Welding electrode

427 42, 427 96, 427 99, 427264, 427266, B05D 300, B05D 302, B05D 312, B05D 500

Patent

active

044938560

ABSTRACT:
A method of coating or cladding existing metallurgical features of a dielectric substrate by sequentially blanket coating the substrate with two discrete levels of diverse metals having differential in melting point and forming a continuous series of alloy solid solutions whose solidus curve lies intermediate the melting points of the two component metals, with the metal having the lower melting point disposed adjacent said substrate, followed by heating of the substrate to a temperature slightly above melting point of the lower melting metal but not exceeding the liquidus temperature of a completely homogenized alloy corresponding to amounts of the metals deposited, with cooling of the substrate to delaminate the metal coatings on the bare surface areas of said substrate, and mechanically removing said delaminated metal coatings to retain a bonded cladding comprised of said metals on said metallurgical features.

REFERENCES:
patent: 3186863 (1965-06-01), Foley, Jr.
patent: 3512051 (1970-05-01), Noll
patent: 3554793 (1971-01-01), Krieger
patent: 3698408 (1972-10-01), Jacke
patent: 3698941 (1972-10-01), De Nobel et al.
patent: 3736167 (1973-05-01), Bachman et al.
patent: 3979858 (1976-09-01), Semones et al.
patent: 4206254 (1980-06-01), Schmecknebecher
IBM TDB, vol. 15, No. 9, Feb. 1973, p. 2855, "Selective Metallization of Ceramic Substrates", Kaus et al.
IBM TDB, vol. 17, No. 2, Jul. 1974, p. 452, Removing Quartz Flakes from Surfaces by Sound Energy, Hafner et al.

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