Structural and electrochemical characteristics of metal films in a polyol- based autocatalytic copper bath

This article divulges the effect of pH and the number of hydroxide groups present in an eco-
friendly copper deposition bath containing polyhydroxylic chelators, where glyoxylic acid was
used as reductant with potassium hydroxide as the pH adjuster at a temperature of 28 ºC. The
monosaccharide polyols like glycerol, erythritol, xylitol, and sorbitol with hydroxylic groups
in their structures respectively was employed as the eco-friendly complexing agent in the
methane sulphonic acid (MSA) solvated deposition bath. The physical, surface, and
electrochemical characteristics of the bath were studied and reported. The after effect of the
study showed that, apart from the hydroxide groups in the polyols, the pH of the electroless
bath also plays a key role in the deposition of copper in the electroless deposition process. The
physical characteristics like pH and temperature dependence on the deposition rate of the bath
were studied. The surface characteristics of the deposits were studied using the atomic
absorption spectroscopy, and the electrochemical characteristics were studied using cyclic
voltammetry (CV), Tafel, and electrochemical impedance spectroscopy studies