Control apparatus for automatically maintaining bath component c

Details Control apparatus for automatically maintaining bath component c Control apparatus for automatically maintaining bath component c

1980-02-28

1981-09-01

Serwin, Ronald

Chemistry: physical processes

Physical processes

Crystallization

118689, 422 62, 4274431, G01N 3116, B05D 312

Patent

active

042869650

ABSTRACT:
A control apparatus for automatically controlling at least the concentration of copper-ions, hydroxyl-ions and formaldehyde-ions in an electroless copper plating bath and independently analyzing, displaying and replenishing the concentration of each such ions whereby a sample for each of the ions is discontinuously removed from the plating bath and diluted with a specific amount of water and, independently of one another, the copper-ion concentration is colorimetrically analyzed, displayed and replenished as needed, the hydroxyl-ion concentration is potentiometrically analyzed, displayed and replenished as needed and the formaldehyde-ion concentration is amperometrically analyzed, displayed and replenished as needed.

REFERENCES:
patent: 4096301 (1978-06-01), Slominski et al.

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