Abstract
This article reports the effect of organosulphur additives such as 2-Mercaptobenzothiazole and 2-Benzothiophene on electroless copper bath. Trace quantity of biodegradable methanesulphonic Bronsted acid was used to develop an ecofriendly electroless bath. Toxic free natural polyhydroxylic complexing agent, Xylitol, Glyoxylic acid, an excellent reducing agent and to control free metal ion concentration, pH modifier, Potassium hydroxide were used. 1 ppm and 10 ppm concentration of organosulphur additives were optimized and analyzed at 45 °C at a pH of 13.0 ± 0.25. Inhibiting and accelerating effect of organosulphur additives depends upon throwing power, thickness uniformity, surface tension, grain structure control and deposit characteristics. The physical parameters were calculated by weight gain and gravimetric methods. Corrosion kinetics and electrochemical properties of ecofriendly electroless bath were analyzed by cyclic voltammetry and the Tafel plot. Surface morphology and structural property of pure copper deposits were investigated by scanning electron microscopy and atomic force microscopic methods.
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