Patent ID: 7251012

Claim:
A lithographic apparatus comprising: an illumination system that provides a beam of radiation; a support structure that supports a patterning structure, the patterning structure configured to impart the beam of radiation with a pattern in its cross-section; a substrate support that supports a substrate; a projection system that projects the patterned beam onto a target portion of the substrate; and a debris-mitigation system that mitigates debris particles which are formed during use of at least a part of the lithographic apparatus, wherein the debris-mitigation system is arranged to apply a magnetic field so that at least charged debris particles are mitigated, wherein the debris-mitigation system is further arranged to switch the magnetic field alternatingly on and off, and wherein the debris mitigation system is further arranged to induce, in use, within a group of the debris particles, a current such that at least charged debris particles of that group deflect under influence of a force which has a direction perpendicular to a component of the magnetic field and perpendicular to a component of the electric current induced.