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Portugaliae Electrochimica Acta
versão impressa ISSN 0872-1904
Port. Electrochim. Acta v.24 n.4 Coimbra 2006
New alkaline copper electroplating bath based on an inorganic complexing agent
Masoud Rafizadeh,a Majid Bahmani,b,* Reza T. Chelarasa
a) Department of Chemistry, University of Tarbiat Moalem, Shahid Mofateh Street, Tehran, Iran
b)Research Institute of Petroleum Industry, Catalyst Division, P.O. Box: 18745-4163, Pazhooheshgah Blvd. Khairabad, Old Qom Road, Tehran, Iran
Received 25 September 2004, accepted October 2006
Abstract
A new alkaline electrolytic solution based on ammonia for copper electroplating has been investigated. Upon addition of alkaline metal hydroxide solution and ammonia followed by the immediate addition of a strong inorganic acid, a highly exothermic reaction takes place. At optimum solution condition ammonia remains in solution as NH2 and forms a complexing agent.
Keywords: copper electroplating, alkaline bath, non-cyanide.
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*Corresponding author. E-mail address: bahmani61@yahoo.com