Projection exposure apparatus and method for measuring a projection lens

Microlithographic projection exposure apparatus (100), having a projection lens (150) for imaging an object plane (155) onto an image plane (156), wherein an immersion liquid is at least temporarily provided during operation of the projection exposure apparatus (100) between the projection lens (150...

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Bibliographische Detailangaben
Hauptverfasser: SCHADT, FRANK, FOCA, EUGEN, HEMPELMANN, UWE, SCHLEICHER, FRANK
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:Microlithographic projection exposure apparatus (100), having a projection lens (150) for imaging an object plane (155) onto an image plane (156), wherein an immersion liquid is at least temporarily provided during operation of the projection exposure apparatus (100) between the projection lens (150) and the image plane (156), wherein a measurement structure (121) is arranged in the immersion liquid, wherein the measurement structure (121) is configured to generate a measurement pattern, having a measurement device (130, 160) for measuring the measurement pattern, and wherein the measurement structure (121) has an absorption layer (125) (125) comprising silicon oxide and/or silicon oxynitride and/or nitride.