Abstract
An investigation was made of polarization characteristics for electroless copper plating baths consisting of copper sulfate, EDTA, formaldehyde, glycine, potassium hexacyanoferrate (II) and triethanolamine. Mixed-potential theory was confirmed from experimental results including local potential-current relationships for copper deposition. Formaldehyde accelerated the rate of copper deposition. The addition of glycine brought about a substantial decrease in the local current for the oxidation of ormaldehyde, as well as in that for copper deposition. Hexacyanoferrate (II) retarded the anodic reactions. It also retarded the property of ormaldehyde to accelerate copper deposition, while accelerating the deposition in itself. Triethanolamine accelerated the oxidation of formaldehyde near the rest potential.
