Electrolysis: processes – compositions used therein – and methods – Electrolytic coating – Treating electrolytic or nonelectrolytic coating after it is...
Patent
1993-03-29
1994-11-22
Valentine, Donald R.
Electrolysis: processes, compositions used therein, and methods
Electrolytic coating
Treating electrolytic or nonelectrolytic coating after it is...
205223, 2041291, 20412965, C25D 1100, C25F 300
Patent
active
053666135
ABSTRACT:
An electrochemical fine processing method for forming a pattern of a substance having different etching resistance against an etching solution from that of an article by bringing the minute forward end of the counter electrode close to the surface of the article. The counter electrode is applied a predetermined electric potential and the electrochemical reaction is repeating in a minute region of the article in the vicinity of the counter electrode to form an optional pattern. After forming the pattern, the article is etched in an etching solution having a property of different etching rate for the pattern forming portion and a portion other than the pattern forming portion. It become possible to form a fine pattern directly onto the surface of an article to be processed having surface unevenness.
REFERENCES:
patent: 2492214 (1949-12-01), Fonda
patent: 3035990 (1962-05-01), Davis et al.
patent: 3325384 (1967-06-01), Frantzen
patent: 5149404 (1992-09-01), Blonder et al.
Ando Akito
Iwasaki Fumiharu
Sakuhara Toshihiko
Shinogi Masataka
Suda Masayuki
Seiko Instruments Inc.
Valentine Donald R.
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