Method of selectively forming oxidized areas

Details Method of selectively forming oxidized areas Method of selectively forming oxidized areas

1972-10-31

1976-02-03

Powell, William A.

Coating processes

With post-treatment of coating or coating material

Chemical agent applied to treat coating

427 99, 427162, 427250, 427258, 427282, 427294, 427350, 427367, 427404, C23C 1100, C23C 1300

Patent

active

039365450

ABSTRACT:
A vapor deposited aluminum metallizing film is transformed into a transparent insulating oxide at selective locations at which a film of bismuth or sodium is vapor deposited either beforehand on the substrate or afterward on the aluminum. The oxide forms at only the selected locations to the full depth of the layer and has insulating qualities of interest for electrical components. The use of a pigmented substrate which will show through the transparent oxide areas is useful for providing visible legends, symbols, scales, and reference margins, marks or rasters.

REFERENCES:
patent: 2702259 (1955-02-01), Sommer
patent: 3306788 (1967-02-01), Sterling et al.
patent: 3406036 (1968-10-01), McGrath et al.
patent: 3472688 (1969-10-01), Hayashi et al.
patent: 3637377 (1972-01-01), Hallman et al.
patent: 3647508 (1972-03-01), Gorrell
patent: 3801366 (1974-04-01), Lemelson

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