Patent ID: 8947630
Filing Date: 2015-02-03
Classification: G03F

Abstract:
1. A lithographic apparatus comprising: a support configured to support a patterning device; a substrate table configured to hold a substrate; a patterning system configured to transfer a pattern from the patterning device onto a target portion of the substrate; a control module configured to control at least one of the support, substrate table or patterning system by periodically retrieving measurements defining baseline control parameters from one or more reference substrates so as to determine parameter drift from the baseline control parameters, thereby enabling allowance and/or correction to be made for the drift, the reference substrates having initially undergone patterning so as to determine the baseline control parameters; and an interface between the control module and the lithographic apparatus; wherein a parameterization of the interface is generic and different from a control parameterization used for control of at least one of the support, substrate table or patterning system, and wherein the parameterization of the interface is projected onto the control parameterization before the correction is made.