Patent ID: 7251020

Claim:
A lithographic apparatus, comprising: an illumination system that supplies a beam of radiation; an array of individually controllable elements that pattern the beam; and a projection system that projects the patterned beam onto a target portion of a substrate, the projection system includes an array of lenses including, a first parallel array of cylindrical lenses, which extend across the patterned beam in a first direction, and a second parallel array of cylindrical lenses, which receive at respective lenses respective portions of the patterned beam from the first parallel array of cylindrical lenses and which extend across the patterned beam in a second direction, the second direction being substantially perpendicular to the first direction, and project the patterned beam onto the target portion of the substrate, wherein the array of lenses receive the patterned beam, divide the patterned beam into a plurality of substantially polygonal portions, and focus each substantially polygonal portion to form a respective beam spot on the target portion of the substrate.