CALIBRATION SYSTEM FOR AN EXTREME ULTRAVIOLET LIGHT SOURCE

A metrology system includes a light beam metrology apparatus configured to sense one or more aspects of an amplified light beam and to make adjustments to the amplified light beam based on the sensed one or more aspects; a target metrology apparatus configured to measure one or more properties of a...

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Bibliographische Detailangaben
Hauptverfasser: Riggs, Daniel Jason, Matthes, Liane Manuela, Leenders, Martinus Hendrikus Antonius, Donker, Rilpho Ludovicus
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A metrology system includes a light beam metrology apparatus configured to sense one or more aspects of an amplified light beam and to make adjustments to the amplified light beam based on the sensed one or more aspects; a target metrology apparatus configured to measure one or more properties of a modified target after a target has interacted with the amplified light beam, and to determine a moment when the modified target achieves a reference calibration state; and a control apparatus configured to: receive the reference calibration state and the moment at which the reference calibration state is achieved from the target metrology apparatus; determine a light beam calibration state of the amplified light beam based on the received reference calibration state and the moment at which the reference calibration state is achieved; and provide the light beam calibration state to the light beam metrology apparatus.