Patent ID: 7229543

Claim:
A system for maintaining a concentration level of a target constituent of an electroplating bath comprising: a sample extraction unit connected to automatically remove a sample of the electroplating bath; an electroanalysis unit connected to receive and perform an electroanalytical technique on the sample obtained by the sample extraction unit, wherein the electroanalytical technique includes at least one of a plating measurement cycle that plates a metal on an electrode of the electroanalysis unit and a stripping measurement cycle that strips the metal from the electrode, and wherein the entire sample is retained within the electroanalysis unit during performance of the electroanalytical technique; a constituent dosing supply unit connected to provide an amount of the target constituent to the electroplating bath; and a programmable control unit connected to communicate with: (a) the sample extraction unit to control extraction of the sample from the electroplating bath and supply of the sample to the electroanalysis unit; (b) the electroanalysis unit to execute the electroanalytical technique to determine an amount of the target constituent in the sample; and (c) the constituent dosing supply unit to control the amount of the target constituent provided to the electroplating bath based on the amount of the target constituent measured in the sample through the use of the electroanalytical technique.