Patent ID: 7170587
Filing Date: 2007-01-30
Classification: G03F

Abstract:
1. A lithographic projection apparatus, comprising: a radiation system configured to provide a beam of radiation, the radiation system including an illumination system; a support configured to support a patterning device, the patterning device configured to pattern the beam of radiation according to a desired pattern; a substrate table configured to hold a substrate; a projection system configured to project the patterned beam of radiation onto a target portion of the substrate; and a device positioned in a first plane intermediate a second plane conjugate to a plane of the substrate and a third plane conjugate to a pupil plane of the projection system, the device comprising a plurality of blades, each blade being selectively insertable into the beam of radiation, wherein the radiation system includes a field faceted mirror and a pupil faceted mirror in order along a direction of propagation of the beam of radiation and the device is positioned between the pupil faceted mirror and the patterning device.