Means for detecting and adjusting metal salt concentration in an

Details Means for detecting and adjusting metal salt concentration in an Means for detecting and adjusting metal salt concentration in an

1986-08-25

1987-10-13

Smith, John D.

Coating apparatus

Control means responsive to a randomly occurring sensed...

Responsive to condition of coating material

118610, 118690, 427 8, C23C 1838

Patent

active

046990810

ABSTRACT:
An apparatus is described for the continuous monitoring of a solution such as an electroless nickel plating bath, and the routine adjustment of the bath during use. The apparatus comprises a probe adapted to be placed directly into the plating tank, and controller for means for replenishing nickel ions and other plating additives as they are depleted from the bath. The probe uses a light source for passing a beam of monochromatic light through a portion of the bath and a detector for measuring the intensity of the light. Means are used to prevent air and hydrogen bubbles in the bath from affecting the reliability of the measurements. Additional means are used for cooling of the electronics and the portion of the bath through which the light is directed.

REFERENCES:
patent: Re31694 (1984-10-01), Slominsk
patent: 3934054 (1976-01-01), Schmeling
patent: 4096301 (1978-06-01), Slominski
patent: 4162217 (1979-07-01), Herrmann
patent: 4353933 (1982-10-01), Araki
patent: 4499852 (1985-02-01), Castner

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