Chemistry: electrical and wave energy – Processes and products
Patent
1977-07-11
1978-06-20
Tufariello, T. M.
Chemistry: electrical and wave energy
Processes and products
427 98, 427305, 427306, C25D 502
Patent
active
040960439
ABSTRACT:
A method of selectively depositing a metal on a surface of a substrate is disclosed. A suitable substrate is selected and a surface is treated with a desensitizer selected from the group consisting of (a) hydrazine, (b) a substituted hydrazine having the structural formula ##STR1## where R.sub.1 is an organic radical selected from the group consisting of alkyl, cycloalkyl, aryl, alkaryl, aralkyl, alkoxy, aryloxy and heterocyclic radicals and R.sub.2, R.sub.3 and R.sub.4 are the hydrogen radical or are the same as R.sub.1, and (c) a mixture of the foregoing. The desensitizer-treated surface is selectively exposed to a source of ultraviolet radiation to render selected areas thereof incapable of desensitizing a sensitizing species. The radiation-exposed surface is treated with a sensitizing species to sensitize the selected areas.
REFERENCES:
patent: 3672925 (1972-06-01), Feldstein
patent: 3676213 (1972-07-01), Marton
patent: 3775121 (1973-11-01), Sharp
patent: 3949121 (1976-04-01), Kenney
patent: 3950570 (1976-04-01), Kenney
patent: 4021314 (1977-05-01), Drafter, Jr.
Rosenstock J.
Tufariello T. M.
Western Electric Company Inc.
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