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topic 4836

Function of Chloride in Acid Copper Plating Bath.


(2000)

Being new to the industry (and being a chemist) I am trying to decipher plating processes on a molecular level.

I am trying to find detailed information on the action/function of the chloride ion in an acid copper electroplating bath - is its function as an aid to anode filming only? We use active soluble phosphorised anode balls. Does it aid in the deposition process;that is, will the leveler and brightener work correctly without the presence of chloride? The reason I'm curious is because I've been told several different things by various experts, and I really require a definitive answer. No doubt the answer is quite straightforward but..........?

Help somebody please!

John Mason
- England


(2000)

The role of chloride is primarily formation of the film on the anode, but do not discount the importance of that film. That film is necessary to the proper corrosion of the anode. If that film is not properly formed, you will find the anodes polarizing. For further info, you might take a look at Modern Electroplating by Lowenheim.

James Totter
James Totter, CEF
- Tallahassee, Florida



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