Patent ID: 7275627

Claim:
An exposure apparatus for exposing a substrate to a pattern on a reticle, said apparatus comprising: an illumination optical unit configured to emit exposure light to irradiate the reticle, said illumination optical unit having a cantilever structure and vibrating around an axis through a cantilever fulcrum; an actuator fixed to said cantilever structure; an inertial load configured to be driven relative to said cantilever structure by said actuator; a driving circuit configured to drive said actuator based on a first signal corresponding to vibration, generated or to be generated, of said cantilever structure, wherein said driving circuit includes a compensator configured to perform a compensation for the first signal to obtain a compensated first signal for said actuator, to apply a force to said cantilever structure, and is configured to drive said actuator based on the compensated first signal, the compensation including: (i) a linear compensation for the first signal to obtain a first compensated signal, and (ii) a nonlinear compensation for the first compensated signal to obtain the compensated first signal, a rate of a change in the compensated first signal to a change in an absolute value of the first compensated signal becoming less with an increase of the absolute value of the first compensated signal.