Compositions useful in copper oxidation, and a method to...

Details Compositions useful in copper oxidation, and a method to... Compositions useful in copper oxidation, and a method to...

C - Chemistry, Metallurgy

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C

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C23C 22/00 (2006.01) C23C 22/63 (2006.01) H05K 3/38 (2006.01) H05K 3/46 (2006.01)

Patent

CA 1320898

RMD-7803 COMPOSITIONS USEFUL IN COPPER OXIDATION, AND A METHOD TO PREPARE COPPER OXIDATION SOLUTIONS Abstract of the Invention Tetra-substituted zirconate or titanate organophosphate or organopyrophosphate coupling agents are combined with an alkali metal phosphate salt and a chlorite salt in an aqueous solution useful for copper oxidation. The concentration of the alkali metal phos- phate salt in the aqueous solution must be 2.5 times higher than the titanate or zirconate coupling agent. A process for the preparation of superior compositions is also described wherein the coupling agent can not be mixed in an aqueous solution with the chlorite salt unless the alkali metal phosphate salt is present in the solution also.

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