Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1986-03-31
1987-06-09
Chapman, Terryence
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
204151, 204301, 204DIG13, B01D 5702
Patent
active
046718613
ABSTRACT:
A method of and apparatus having utility in an electrodialysis and electrosynthesis process energized by direct eletrical current for the purification and replenishment of an electroless copper plating solution comprises indirectly measuring the hydroxide production that is put into and left in the electroless copper plating solution from a catholyte solution in which the hydroxide is synthesized by measuring the net hydronium ion content of an anolyte solution into which waste products from the electroless copper plating solution are transported, and adjusting the flow of direct electrical current in response to the net hydronium ion production in the anolyte solution.
REFERENCES:
patent: 4289597 (1981-09-01), Grenda
patent: 4324629 (1982-04-01), Oka et al.
patent: 4425205 (1984-01-01), Honma et al.
patent: 4549946 (1985-10-01), Horn
patent: 4600493 (1986-07-01), Korngold
Chapman Terryence
Morton Thiokol Inc.
White Gerald K.
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