Process control with control signal derived from metrology of a repetitive critical dimension feature of a test structure on the work piece

摘要

A method is provided for manufacturing, the method including processing a workpiece in a processing step, measuring a critical dimension of features formed on the workpiece using a test structure formed on the workpiece, the test structure including a plurality of the features, and forming an output signal corresponding to the critical dimension measurements. The method also includes feeding back a control signal based on the output signal to adjust the processing performed in the processing step if the output signal corresponding to the critical dimension measurements indicates a predetermined tolerance value has been exceeded.