Abstract
Electrolyzed alkaline water, obtained by the electrolysis of a dilute NaCl solution in a cathode compartment shows high pH (alkalinity), low ORP (Oxidation Reduction Potential), and moderate reducibility and oil-emulsification. By utilizing the characteristics of the alkalinity and the oil-emulsification of the electrolyzed alkaline water, metals and lead frames stamped with oil were washed and cleaned, then the cleanness of metals and lead frames for electronic products was evaluated. The surface analysis and quantitative data on remaining residual oils and ionic contamination, AES (Auger Electron Spectroscopy) analysis on metals, and wire-bond pull strength on the lead frames which were washed and cleaned by the electrolyzed alkaline water, showed the same level of cleanness compared to that of the conventional cleaning method by chemicals.
