Studies on Diethanolaminedithiocarbamate as Metal Complex, Complexing Agent and Stabilizer in Copper Methanesulphonate Bath

We report a study on the use of diethanolaminedithiocarbamate (DEADTC) as complexing agent during electroless deposition of copper. For this, we study the nature and structure of the coordination complex between DEADTC and copper and the electrochemistry of the system. The properties of the complex are studied by UV and IR spectroscopy techniques. We then analyze the effect of adding DEADTC as complexing agent in electroless copper methanesulphonate baths. Its use as a stabilizer in ecofriendly xylitol based methanesulphonate baths is also studied and DEADTC is found to be a good inhibitor. Compact and finer deposits are observed in an optimized bath at pH 13.25 at 28 2 C with 1 ppm addition. The stabilization properties are determined by the AFM, CV, XRD and impedance techniques.