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Abstract
Six model thiols, Bis-(3-Sulfopropy1)-disulfide sodium salt (SPS), 3-Mercapto-l- propanesulfonic sodium salt (MPS), (O-Ethyldithiocarbonato)-s-(3-sulfoproplyl)-ester potassium salt(OPX), 3-S-Isothiuronium Propyl Sulfonate(UPS), N, N-Dimethyl- dithiocarbarnylpropyl sulfonic sodium salt (DPS), and 3 (Benzothiazolyl-2-mercapto)-propyl-sulfonic sodium salt (ZPS) in an acid-copper plating bath containing chloride ions and polyethylene glycol (PEG) have been systematically evaluated and characterized by electrochemical method and by fill study.