Patent ID: 7879222
Filing Date: 2011-02-01
Classification: C25D,G01N

Abstract:
1. A method for determining the concentration of an additive breakdown product in a copper plating bath sample, comprising the steps of: performing a voltammetric analysis for a leveler additive in a first measurement solution comprising a background electrolyte and a first volume fraction of the copper plating bath sample, wherein a first value for a copper electrodeposition rate parameter is measured for the first measurement solution; repeating the voltammetric analysis for the leveler additive in a second measurement solution comprising the background electrolyte and a second volume fraction of the copper plating bath sample, wherein a second value for the copper electrodeposition rate parameter is measured for the second measurement solution; and comparing the first and second values measured for the copper electrodeposition rate parameter to determine the concentration of the additive breakdown product in the copper plating bath sample.