Electrolysis: processes – compositions used therein – and methods – Electroforming or composition therefor – Sheet – web – wire – or filament
Patent
1998-05-28
1999-12-07
Mayekar, Kishor
Electrolysis: processes, compositions used therein, and methods
Electroforming or composition therefor
Sheet, web, wire, or filament
205111, C25D 104
Patent
active
059977108
ABSTRACT:
This invention provides a process for producing an electrolytic copper foil for a printed wiring board by supplying current between a rotary cathode and an electrolytic anode in a copper electrolyte so as to electrodeposit copper on the surface of the rotary cathode, wherein an anode for high electric current is placed opposite to the electrodeposition starting surface of the rotary cathode in such a manner that a part of the anode is projected above a liquid level of the copper electrolyte, and the copper electrolyte existing between the anode for high electric current and the opposed rotary cathode surface is electrolyzed by providing a high electric current with a current density higher than that of the electrolytic anode, and an apparatus for producing an electrolytic copper foil for a printed wiring board having excellent properties.
REFERENCES:
patent: 3483113 (1969-12-01), Carter
patent: 3901785 (1975-08-01), Buzhinskaya et al.
patent: 5326455 (1994-07-01), Kubo et al.
Hirasawa Yutaka
Miyazaki Tomohiro
Ohara Muneharu
Mayekar Kishor
Mitsui Mining & Smelting Co. Ltd.
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