Patent ID: 8563951

Claim:
An exposure system for integrated circuit fabrication, comprising: a beam generator configured to irradiate source beams in a direction of an object to be exposed by the source beams; a first beam shaper disposed proximate said beam generator, said first beam shaper having a first aperture therein positioned to pass through the source beams received from said beam generator; and a second beam shaper disposed proximate said first beam shaper, said second beam shaper comprising: a plate having a second aperture therein positioned to receive the source beams passed through the first aperture of said first beam shaper; a first actuator; a first shift screen mechanically coupled to the first actuator, said first shift screen configured to at least partially block the second aperture from receiving the source beams from said first beam shaper in response to movement of the first actuator; and a second actuator mechanically coupled to the plate, said second actuator configured to move the plate in a direction orthogonal to the movement of the first actuator.