Patent ID: 7135692

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; and a projection system that projects the patterned beam onto a target portion of the substrate, the illumination system comprising a radiation-production system that produces extreme ultra-violet radiation, wherein particles produced as a by-product of extreme ultra-violet radiation production move substantially in a particle-movement direction; and a radiation-collection system that collects the extreme ultra-violet radiation, the radiation-collection system being arranged to collect extreme ultra-violet radiation which radiates in a collection-direction, the collection-direction being substantially different from the particle-movement directions wherein the radiation-production system comprises two oppositely chargeable electrodes that generate an electric field therebetween, and the electric field substantially follows an axial direction of the radiation-production system.