Patent Document ID: 20140061053
Application ID: 13603836
Patent Flag: 0

Claim One:
1. A method for controlling an electroplating process in an electroplating chamber having a plurality of electrodes, comprising: applying electric current to each of the electrodes, with the current to each electrodes varying over time according to a multi-variable function, and with the current electroplating a layer of material onto a substrate; integrating the multi-variable current function with respect to time, for each electrode, to determine a net plating charge delivered through each electrode; comparing a plating profile of the layer of material to a target plating profile, and identifying deviations between the achieved plating profile and the target plating profile; using the deviations to determine new net plating charges for each electrode, with the new net plating charges selected to reduce the identified deviations when processing a second subsequent workpiece; changing one or more variables of the multi-variable function to provide a new multi-variable function; for each new plating charge, distributing the new net plating charge over time according to the new multi-variable current function; using the distributed new plating charges for each electrode to electroplate a layer of material on a second substrate.