ILLUMINATION SYSTEM FOR A MICROLITHGRAPHIC EXPOSURE APPARATUS
摘要
<p>An illumination system of a microlithographic exposure apparatus comprises a condenser for transforming a pupil plane into a field plane. The condenser has a lens group that contains a plurality of consecutive lenses. These lenses are arranged such that a light bundle focused by the condenser on an on-axis field point converges within each lens of the lens group. At least one lens of the lens group has a concave surface. The illumination system may further comprise a field stop objective that at least partly corrects a residual pupil aberration of the condenser.</p>
申请公布号
EP1875292(A2)
申请公布日期
2008.01.09
申请号
EP20060724583
申请日期
2006.04.26
申请人
CARL ZEISS SMT AG
发明人
SOHMER, ALEXANDER;DODOC, AURELIAN;FELDMANN, HEIKO;ULRICH, WILHELM;FUERTER, GERHARD;EGGER, RAFAEL;HOEGELE, ARTUR;RAUM, MICHAEL