Finishing method of copper processed item

摘要

The software etching technology which raises of removal of fat of the surface of the copper processed item and the adhesion of removal and the resist membrane of oxide skin and, furthermore it is something which offers the technology which converts the effluent treatment which accompanies this software etching non-polluting. Namely, as first the electrolytic alkaline ion water, next after sequential processing the electrolytic acidic ion water, furthermore making use of the electrolytic alkaline ion water, washing and drying processing is done, mixing with the treated waste water of the electrolytic acidic ion water and the treated waste water of the electrolytic alkaline ion water, it neutralizes the surface of the copper processed item, it collects the copper ion from the neutral water which is obtained.