Patent Document ID: 20050263399
Application ID: 10856619
Patent Flag: 0

Claim One:
1. A method for measuring the concentrations of a suppressor additive and an anti-suppressor additive in a plating bath for electrodeposition of a metal, comprising the steps of: (1) measuring the electrodeposition rate of the metal in a supporting electrolyte of the plating bath under a first predetermined set of conditions; (2) providing a calibration curve by measuring the electrodeposition rate of the metal, under the first predetermined set of conditions, in a plurality of calibration solutions resulting from standard addition of the suppressor additive to the supporting electrolyte; (3) measuring the electrodeposition rate of the metal, under the first predetermined set of conditions, in at least one measurement solution resulting from standard addition of the plating bath to the supporting electrolyte; (4) determining the suppressor additive concentration in the plating bath from a decrease in the electrodeposition rate of the metal measured in Step (3) via reference to the calibration curve provided in Step (2); (5) providing a fully-suppressed measurement solution, for which the electrodeposition rate of the metal is substantially the minimum value, by standard addition of the suppressor additive, the plating bath, or combinations thereof to the final measurement solution from Step (3); (6) measuring the electrodeposition rate of the metal in the fully-suppressed measurement solution under a second predetermined set of conditions before and after at least one standard addition of the anti-suppressor additive to the fully-suppressed measurement solution provided in Step (5); and (7) determining the anti-suppressor additive concentration in the plating bath from an increase in the electrodeposition rate of the metal measured in Step ( 6 ).