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Quantitative Analysis of Chemical Copper Baths

IP.com Disclosure Number: IPCOM000039035D
Original Publication Date: 1987-Apr-01
Included in the Prior Art Database: 2005-Feb-01

Publishing Venue

IBM

Related People

Authors:
Meinholz, H [+details]

Abstract

Quantitative analysis is used to determine the total basicity, the free and complexed ethylenediaminetetraacetic acid EDTA and the copper sulphate in chemical copper baths. The total basicity, calculated as NaOH, and the free EDTA are determined by titration with a strong acid according to the formula The complexed EDTA is determined in the same way after having been freed, for which purpose it is replaced by cyanide ions in the copper complex. The copper content of the bath is calculated from the amount of complexed EDTA.