Solution for formation of black oxide

Details Solution for formation of black oxide Solution for formation of black oxide

1984-06-04

1985-04-23

Lesmes, George F.

Metal treatment

Compositions

Heat treating

148 615R, 25218723, C23F 502, C23F 504

Patent

active

045128189

ABSTRACT:
There is disclosed a formulation for the formation of a black oxide particularly useful in the fabrication of multi-layered printed circuits. The formulation comprises an oxidant and a hydroxide and is characterized by the addition of a water soluble or dispersible polymer to regulate the properties of the black oxide solution.

REFERENCES:
patent: 2417885 (1947-03-01), Powell et al.
patent: 2460896 (1949-02-01), Meyer
patent: 2460898 (1949-02-01), Meyer
patent: 2464596 (1949-03-01), Mason
patent: 2481854 (1949-09-01), MacMahon
patent: 2593922 (1952-04-01), Robinson et al.
patent: 3677827 (1972-07-01), Weaver et al.
patent: 4409037 (1983-10-01), Landau

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