Electrolysis: processes – compositions used therein – and methods – Electrolytic coating – Controlling current distribution within bath
Patent
1995-07-07
1997-08-12
Gorgos, Kathryn L.
Electrolysis: processes, compositions used therein, and methods
Electrolytic coating
Controlling current distribution within bath
205106, 205122, 205124, C25D 1102, H01L 21316
Patent
active
056561474
ABSTRACT:
When an anodized film is to be formed, one formation-voltage input point is used. An interconnecting ring for anodization is provided between the input point and a pattern to be anodized. The interconnecting ring is in contact with and encloses the pattern. Another interconnecting ring to which the formation-voltage input point is connected is provided around the interconnecting ring. In addition, two junction points are provided at vertically symmetric positions with respect to the pattern. The junction points are connected to the interconnecting ring. The junction points are connected to upper connection terminals and lower connection terminals of the pattern by respective thin-line groups including a plurality of thin lines. The formation voltages at respective input points at the upper connection terminals and the lower connection terminals of the pattern are made equal to each other.
REFERENCES:
patent: 3640854 (1972-02-01), Klein
patent: 4203087 (1980-05-01), Kovac et al.
patent: 4469568 (1984-09-01), Kato et al.
patent: 5352907 (1994-10-01), Matsuda et al.
Ishimoto Yoshihisa
Kishida Masahiro
Yoshimizu Toshiyuki
Gorgos Kathryn L.
Leader William T.
Sharp Kabushiki Kaisha
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