Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 153, Issue 2, Pages C127-C132Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.2165580
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The influence of a catalyst deactivating leveling additive in electrodeposition is explored in the context of the previously developed curvature enhanced accelerator coverage model of superconformal film growth. Competitive adsorption between a rapidly adsorbed suppressor, rate accelerating catalyst, and catalyst-deactivating leveler is examined. Rate equations are formulated where the leveling agent is capable of deactivating the adsorbed catalyst by either direct adsorption from the electrolyte or by deactivation/displacement during surface area reduction that accompanies advancing concave surfaces. The influence of a prototypical cationic surfactant leveler on electrochemical kinetics and feature filling is examined for copper electrodeposition from an electrolyte containing polyethylene glycol-chloride-bis(3-sulfopropyl)disulfide (PEG-Cl-SPS). (c) 2006 The Electrochemical Society.
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