Patent ID: 8027026
Filing Date: 2011-09-27
Classification: G03F

Abstract:
1. A device manufacturing method, comprising: providing a lithographic apparatus, comprising a projection system and a liquid supply system to supply a liquid to a space between the projection system and a substrate, the liquid supply system including a mixer configured to mix at least a first component with a second component to form the liquid before supply to the space, a controller configured to control a physical property of the liquid by controlling the amount of the first and/or second component used to form the liquid, and a measuring device configured to measure a property of the liquid and to make feedback available to the controller; mixing using the mixer the first component and the second component to form the liquid; measuring a property of the liquid using the measuring device and making the feedback available to the controller; based on the feedback, controlling with the controller the physical property of the liquid by controlling the amount of the first and/or second component used to form the liquid; supplying the liquid to the space between the projection system and the substrate; and projecting a patterned beam of radiation, using the projection system, through the liquid onto a target portion of the substrate.