Lithographic projection apparatus

A lithographic apparatus of the scanning type in which reticle masking blades 7 are opened at the beginning of a scan, Means are provided to compensate for an increase in the intensity density of the illumination beam as the reticle masking blades are opened. These means may comprise lamp control me...

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Hauptverfasser: CORBEIJ, WILHELMUS MARIA, BONNEMA, GERRIT MAARTEN, DE LEEUW, RARD WILLEM, VAN DER LEI, SIJBE ABRAHAM HARTMAN
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creator CORBEIJ, WILHELMUS MARIA
BONNEMA, GERRIT MAARTEN
DE LEEUW, RARD WILLEM
VAN DER LEI, SIJBE ABRAHAM HARTMAN
description A lithographic apparatus of the scanning type in which reticle masking blades 7 are opened at the beginning of a scan, Means are provided to compensate for an increase in the intensity density of the illumination beam as the reticle masking blades are opened. These means may comprise lamp control means 10 for controlling a compensating decrease in the lamp intensity. The reticle masking blades 70 may be manufactured of, e.g., quartz and provided with a reflective rear coating, e.g. of aluminium, so that portions of the illumination beam intercepted by the reticle masking blades are totally internally reflected.
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subjects APPARATUS SPECIALLY ADAPTED THEREFOR
BASIC ELECTRIC ELEMENTS
CINEMATOGRAPHY
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
ELECTROGRAPHY
HOLOGRAPHY
MATERIALS THEREFOR
ORIGINALS THEREFOR
PHOTOGRAPHY
PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES
PHYSICS
SEMICONDUCTOR DEVICES
title Lithographic projection apparatus
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