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Wafer Steppers

How an ASML Lithography Machine Moves a Wafer

asml-litho

air-bearings-and-interferometers

metroframe
bodes

Performance Results of a New Generation of 300mm Lithography Systems
Control of Wafer Scanners: Methods and Developments

  • linear motors (long stroke) and voice coil actuators (short stroke)
  • older generations were air-bearings and differential interferometers
  • latest (in a vacuum) are maglev on hallbach arrays w/ many interferometers

maglev

NIST MechE

one one one one one one one one


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