Patent ID: 6586754
Filing Date: 2003-07-01
Classification: G03F

Abstract:
A lithographic projection apparatus comprising:a radiation system for supplying a projection beam of radiation; a movable mask table provided with a mask holder for holding a mask, and connected to a mask table positioning mechanism; a movable wafer table provided with a substrate holder for holding a substrate, and connected to said substrate table positioning mechanism; a projection system for imaging an irradiated portion of the mask onto a target portion of the substrate; a flexible conduit carrier which connects at least one of said movable mask table and said movable wafer table to a frame outside that table; a force sensor for measuring forces exerted on the said at least one table by the conduit carrier and generating a force signal representative of said forces; and a motion controller responsive to said force signal, for generating control signals to cause the positioning means connected to the said at least one table to apply compensatory forces to that table.