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Dyes for Acid Copper bath
April 29, 2009
Some one could let me know what dyes used in sulfuric acid csolution for Acid cu bath.
Thanks a lot
employee - Guangdong, China
^- Privately contact this inquirer -^
May 12, 2009
There are several known organic dyes, which can help to improve the levelling:
Janus Green B (Diethyl Safranine Azo Aniline), Safranine T, Janus Black R, Janus Blue B etc. They can be obtained from Sigma-Aldrich. In any case they must be of high quality.
But it's quite hard to formulate good acid cu additives, you also need MPS, DPS, UPS, a well balanced mixture of special surfactants
(incl. block copolymers), etc.
In your case I would contact Raschig company, as they supply many of the needed specialties.
Good luck!
- Berlin, Germany
May 13, 2009
I had never heard of dyes being used in a copper plating bath, Jerry. I thank Martin for alerting me that, apparently, the brighteners used in acid copper can be dyes.
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