Apparatus for measuring horizontal level of a wafer chuck

Geometrical instruments – Gauge – Straightness – flatness – or alignment

Reexamination Certificate

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Details

C033S549000, C033S613000, C033S365000

Reexamination Certificate

active

07131209

ABSTRACT:
An apparatus for measuring a horizontal level of a wafer chuck, including a measuring part for contacting the wafer chuck to measure a horizontal level, a mounting part on which the measuring part is mounted, and a supporting part for supporting the mounting part. The measuring part may include a center gage and a plurality of edge gages.

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