Method of etching metallic materials including a major percentag

Details Method of etching metallic materials including a major percentag Method of etching metallic materials including a major percentag

1980-10-27

1982-09-21

Kendell, Lorraine T.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156656, B44C 122

Patent

active

043505643

ABSTRACT:
A method of etching a desired pattern in a thin film of chromium deposited on a substrate is described. A layer of a masking material which is etch-resistant is formed on the film of chromium and provided with the desired pattern. Portions of the thin film of chromium uncovered by the patterned layer of etch-resistant material are covered with a thin layer of aluminum having a multiplicity of holes. The substrate including the layer of aluminum in contact with thin film of chromium is immersed in a dilute hydrochloric acid solution whereby the layer of aluminum and the portion of the thin film of chromium in contact therewith are dissolved thereby providing the desired pattern in the thin film of chromium.

REFERENCES:
patent: 3539408 (1970-11-01), Cashau et al.
patent: 3616349 (1971-10-01), Szupillo
patent: 3695955 (1972-10-01), Jochems et al.
patent: 4057831 (1977-11-01), Jacobs et al.
patent: 4105468 (1978-08-01), Geshner
patent: 4160691 (1979-07-01), Abolafia et al.

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