CATOPTRIC ILLUMINATION SYSTEM FOR MICROLITHOGRAPHY TOOL

摘要

In general, in one aspect, the invention features a system that includes an illumination system of a microlithography tool, the illumination system including a first component (400) having a plurality of elements (401). During operation of the system, the elements direct radiation from a source along an optical path to an arc-shaped object field at an object plane of a projection objective, and at least one of the elements (410) has a curved shape that is different from the arc-shape of the object field.