Patent ID: 6943941
Filing Date: 2005-09-13
Classification: G02B,G03F

Abstract:
1. A lithographic projection apparatus, comprising: a radiation system constructed and arranged to provide 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 to hold a substrate; a projection system constructed and arranged to project the patterned beam onto a target portion of the substrate; and a polarizer device constructed and arranged to polarize said beam of a radiation in a transverse electric polarization direction, wherein said polarizer device comprises: a substrate material having a first refractive index; a plurality of elongated azimuthally oriented elements coupled to said substrate material, said elongated elements having a second refractive index, and wherein said plurality of elements are periodically spaced apart to form a plurality of gaps defining a radial transverse electric polarizer device that interacts with the beam of radiation comprising first and second polarizations to reflect substantially all of the radiation of the first polarization and transmit substantially all of the radiation of the second polarization.