Lithographic apparatus and contamination detection method

A lithographic apparatus includes a vessel that encloses a component with a test surface to be probed for contamination control; and an optical probe configured to transmit and receive an optical probing beam. The vessel includes a first optical port configured to transfer the optical probing beam t...

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Bibliographische Detailangaben
Hauptverfasser:	MOORS JOHANNES HUBERTUS JOSEPHINA, STEVENS LUCAS HENRICUS JOHANNES, VEEFKIND ABRAHAM, BUSSINK PETER GERHARDUS WIHELMUS, BRUINSMA ANASTASIUS JACOBUS ANICETUS, BROUWER EGBERT ANNE MARTIJN
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS SPECIALLY ADAPTED THEREFOR CINEMATOGRAPHY COLORIMETRY ELECTROGRAPHY HOLOGRAPHY INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MATERIALS THEREFOR MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT MEASURING ORIGINALS THEREFOR PHOTOGRAPHY PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES PHYSICS RADIATION PYROMETRY TESTING
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Beschreibung
Zusammenfassung:	A lithographic apparatus includes a vessel that encloses a component with a test surface to be probed for contamination control; and an optical probe configured to transmit and receive an optical probing beam. The vessel includes a first optical port configured to transfer the optical probing beam towards the test surface, and a second optical port configured to receive a reflected optical probing beam. The optical probe includes a light source configured to provide the optical probing beam, a polarization conditioner configured to provide a predefined polarization state to the probing beam, and a spectral analyzer. The polarization conditioner is preset to provide a minimal transmission for a minimal transmission wavelength, and the spectral analyzer is arranged to detect a wavelength shift of the minimal transmission wavelength in response to a polarization change due to the presence of contamination.