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- W2103480251 abstract "Chloride ions and polyethylene glycol (PEG) are used together as additives to copper damascene electroplating baths, in which they suppress deposition. When the concentration is lower than the order of 1 mM, suppression abruptly breaks down below a critical potential, around which hysteresis between active and inhibited deposition is observed. A mathematical model is presented which successfully predicts the observed concentration-dependent breakdown of PEG suppression and current-potential hysteresis. The model assumes that adsorbed ions are involved in binding of PEG to the Cu surface, and that these ions are incorporated in the deposited film. The expressions for incorporation and adsorption are consistent with experimental measurements of Cl in deposits. Hysteresis was found to depend on the high sensitivity of polymer surface coverage to the concentration of adsorbed ions, possibly because each PEG molecule has a small number of binding sites to the surface." @default.
- W2103480251 created "2016-06-24" @default.
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- W2103480251 date "2005-01-01" @default.
- W2103480251 modified "2023-10-16" @default.
- W2103480251 title "Role of Chloride Ions in Suppression of Copper Electrodeposition by Polyethylene Glycol" @default.
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- W2103480251 doi "https://doi.org/10.1149/1.1878372" @default.
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