COPPER REPLENISHMENT TECHNIQUE FOR PRECISION COPPER PLATING SYSTEM

摘要

A copper replenishment system (10) is designed for replenishing copper which is depleted from a coppet plating solution (15). The replenishment is achieved by the use of a compact filter cartridge (30), which is inserted into a recirculating loop (12) for the solution. The filter cartridge (30) contains a chemical, which when reacting with the solution, replenishes the copper into the solution. The filter cartridge (30) is a compact unit which can be easily handled and reduces the amount of contaminants that could be introduced by the presence of the replenishment chemical.