Patent ID: 8808521
Filing Date: 2014-08-19
Classification: C25D

Abstract:
1. An integrated process control method for controlling an electroplating bath that is used to deposit an electroplated film on a substrate, comprising: (a) an additive's effective nominal (target) concentration that is a nominal concentration of a first additive in the presence of “n” degradation products in addition to a plurality of other additives where n is an integer ≦1 and is determined according to the equation: wherein (1) the nominal concentration is the target concentration of an additive in a new electroplating bath, or in a working electroplating bath under significant bleed and feed in which the concentration of degradation products are kept low and (2) the additive equivalent amount of an additive is the amount of the additive that would produce the same electroplating effect as the presence of the degradation products in an electroplating bath; (b) calculating an amount of the first additive and each of the plurality of additives (addition amount) required to replenish the consumed additives at periodic intervals according the equation: wherein the measured concentration is the concentration of the additive in the electroplating bath determined by one or more analytical speciation techniques; and (c) replenishing the electroplating bath by adding the additive amount of the first additive and each of the plurality of additives.