Electrocrystallization behavior of copper electrodeposited from aqueous sulfuric acid with thiourea and chloride additives

J. H. Chang*, C. A. Huang, F. Y. Hsu

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

5 Scopus citations

Abstract

Copper was electroplated from cupric sulfate-sulfuric acid solutions with various concentrations of thiourea and chloride ions. The microstructures of deposits were analyzed by optical microscopy, X-ray diffraction (XRD) and transmission electron microscopy (TEM). XRD results indicated that the most preferred orientation of the copper deposits was (220) when thiourea concentrations were greater than 5 ppm. However, the preferred orientation changed obviously when chloride ions were added together with thiourea;, moreover, the grain type of the deposit changed from columnar to equiaxed. TEM images showed considerable twinning in copper plated from solutions containing less than 1 ppm thiourea. Grain sizes of copper deposits decreased when higher concentrations of thiourea were added to the plating bath, together with chloride ions. Copyright The Electrochemical Society.

Original languageEnglish
Title of host publicationElectrochemistry in Mineral and Metal Processing VII
PublisherElectrochemical Society Inc.
Pages329-334
Number of pages6
Edition3
ISBN (Electronic)1566774403
ISBN (Print)1566774403, 9781566774406
StatePublished - 2006
Event7th International Symposium on Electrochemistry in Mineral and Metal Processing - 209th Meeting of the Electrochemical Society - Denver, CO, United States
Duration: 08 05 200610 05 2006

Publication series

NameECS Transactions
Number3
Volume2
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Conference

Conference7th International Symposium on Electrochemistry in Mineral and Metal Processing - 209th Meeting of the Electrochemical Society
Country/TerritoryUnited States
CityDenver, CO
Period08/05/0610/05/06

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