Method and apparatus of compensating for position shift

Data processing: generic control systems or specific application – Specific application – apparatus or process – Mechanical control system

Reexamination Certificate

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C250S442110

Reexamination Certificate

active

08050802

ABSTRACT:
A levitated XY stage with a mechanism to disable the bearing element to allow the physical elements of the stage to come into contact with one another and “Coulomb weld” together, thereby eliminating drift. Preferably, the XY position shift of the stage that results from disabling the bearing is measured, and feed-forward communication to, for example, the AFM scanner is used to enable an offset and remove the error.

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