Patent ID: 8629970
Filing Date: 2014-01-14
Classification: G03F

Abstract:
1. A lithographic apparatus for immersion lithography, the apparatus comprising: a projection system configured to project a patterned radiation beam onto a target portion of a substrate, the substrate being supported on a substrate table; a fluid handling system having a fluid handling structure configured to provide an immersion fluid, comprising liquid, to a space between the projection system and the substrate, or the substrate table, or both; a metrology device configured to directly monitor a parameter of the immersion fluid; and a recycling control device coupled to the metrology device, the recycling control device configured to regulate a routing of the immersion fluid either to be supplied to the space or to be reconditioned, based on an output of the metrology device, and configured to regulate a routing of immersion fluid from the fluid handling structure after use to a regular fluid reconditioning unit to remove solid or liquid material from the immersion fluid or to a separate intense fluid reconditioning unit to remove solid or liquid material from the immersion fluid, based on an output of the metrology device.