Patent ID: 6717296
Filing Date: 2004-04-06
Classification: G03F,H02K,Y10S

Abstract:
A lithographic projection apparatus, comprising:a radiation system constructed and arranged to supply a projection beam of radiation; a support structure constructed and arranged to support a patterning device, the patterning device constructed and arranged to pattern the projection beam according to a desired pattern; a substrate table that holds a substrate; a projection system constructed and arranged to project the patterned beam onto a target portion of the substrate; and a motor comprising a long stroke motor constructed and arranged to produce a force between a first part of the motor and a machine frame of the apparatus over a long range of movement in at least one direction and a Lorentz actuator constructed and arranged to produce a force between the first part and a second part of the motor over a short range of movement in at least one direction, the second part being connected to the support structure or the substrate table, wherein the Lorentz actuator comprises: a main magnet system, attached to one part of the motor that is the first part or the second part of the motor, constructed and arranged to provide a first magnetic field substantially perpendicular to the direction of the force; and an electrically conductive element, attached to another part of the motor that is the other of the first part or the second part of the motor, constructed and arranged to produce the force by interaction of an electric current carried by the electrically conductive element and the first magnetic field; and a subsidiary magnet system, attached to the one part of the motor constructed and arranged to provide a second magnetic field substantially perpendicular to the first magnetic field, wherein the main magnet system and the subsidiary magnet system are arranged in a Halbach configuration.