Douglas M Simms

US Patent:

40778517, Mar 7, 1978

Filed:

Mar 4, 1977

Appl. No.:

5/774482

Inventors:

Douglas Leon Simms - East Orange NJ
Peter Kenny Skurkiss - Short Hills NJ
Clark Woody White - Oak Ridge TN

Assignee:

Bell Telephone Laboratories, Incorporated - Murray Hill NJ

International Classification:

C25D 502
C23C 1500

US Classification:

204 15

Abstract:

A process is described for putting down patterned chromate films on metal substrates. The procedure involves first forming a chromate film on the metal surface and then forming the patterned chromate film. The pattern is formed by sputtering the substrate through a suitable shadow mask. This procedure yields patterned chromate films with high dimensional tolerance limits. Such patterns are particularly useful in the fabrication of electronic artifacts, as for example, a mask in gold plating processes.