Patent ID: 7851222

Claim:
An electrochemical plating system, comprising: one or more plating cell reservoirs for storing plating solution; a chemical analyzer in fluidic communication with the one or more plating cell reservoirs, wherein the chemical analyzer is configured to measure chemical concentrations of the plating solution; a sampling reservoir coupled to the chemical analyzer, wherein the sampling reservoir is configured to hold a portion of the plating solution; a plumbing system configured to facilitate the fluidic communication between the one or more plating cell reservoirs and the chemical analyzer and to substantially isolate the chemical analyzer from electrical noise generated by one or more plating cells of the one or more plating cell reservoirs, wherein the plumbing system comprises at least one valve that allows the portion of the plating solution to flow from the one or more plating cell reservoirs to the sampling reservoir, when the at least one valve is in an open position; and a system controller, wherein the system controller comprises a microprocessor, and wherein the system controller is configured to receive inputs and use the inputs to control: (i) circulating a portion of a plating solution through the chemical analyzer; and (ii) switching the at least one valve to a closed position once the sampling reservoir is filled with the portion of the plating solution to substantially isolate the chemical analyzer from the electrical noise generated by the one or more plating cells.