US6822729B2

Microlithographic projection illumination with tangential polarisation

Summary by NHIP

Tangential Polarization Illumination

The method increases contrast in high-aperture microlithographic exposure by polarizing light perpendicular to the plane of incidence on the resist. Arrangements influence tangential or linear polarization adapted to dipole illumination within the illuminating system and reduction objective.

Abstract

A method and an arrangement for microlithographic projection exposure at high aperture achieve a contrast increase by the polarization of the light perpendicular to the plane of incidence on the resist. Arrangements are provided which influence the tangential polarization or the linear polarization adapted to the dipole illumination in the illuminating system and in the reduction objective.

Term

Term ended

Expired 5 March 2021, 5.6 years ago.

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