Abstract
Electrolytically-oxidized water is different from HCl solution, and that doesn't have any bad influence on the human body and the environment. If electrolytically-oxidized water can be applied to surface treatment of the lead frame, the environmental load can reduce. Almost, by the immersion experiment, it clarified the etching operation of electrolytically-oxidized water to the copper alloy for the lead frame.As the results, the etching speed of electrolytically-oxidized water is big compared with HCl solution. Next, by the surface analysis of the test pieces, it made the influence of the electrolytically-oxidized water on the chemical composition of the surface of the copper alloy for the lead frame clear. That is, when using electrolytically-oxidized water, the oxide film in the surface of Cu-Ni alloy doesn't change but the Cu-Fe alloy oxide film becomes thick. The study indicates the electrolytically-oxidized water can be applied to the oxide film removal of Cu-Ni alloy and the wash of the Cu-Fe alloy surface.
