Etchant

Details Etchant Etchant

1983-01-18

1983-12-06

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

1566591, 156902, 252 792, 252 794, 427 96, 427309, C23F 100, B44C 122

Patent

active

044191839

ABSTRACT:
An etchant, especially for copper, comprising sulfuric acid and hydrogen peroxide and characterized by the inclusion of a small amount of tungsten in an amount sufficient to increase the surface area of the etched metal.

REFERENCES:
patent: 3650959 (1972-03-01), Shipley et al.
patent: 4144119 (1979-03-01), Dutkewych et al.
Hydrogen Peroxide, W. C. Schumb et al., Reinhold Publishing Corporation, New York, NY. pp. 467-469 & pp. 496-498, 1965.

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