Patent ID: 7315349

Claim:
Exposure equipment adapted for use in the manufacture of a semiconductor device, comprising: a wafer seat adapted to seat a wafer; an illuminating system adapted to irradiating the wafer with light of a desired wavelength; a reticle support interposed between the wafer seat and the illuminating system and adapted to hold a reticle such that the light from the illuminating system passes through the reticle to the wafer; an optical system interposed between the wafer seat and the reticle support and adapted to transmit the patterned light from the reticle to a target portion of the wafer; and optical-system positioning mechanism adapted to measure and compensate for movement of the optical system, wherein: the optical-system positioning mechanism comprises: a correction unit adapted to position the optical system; a data comparator adapted to compare movement data from a wafer transferring unit and compensation data from a reticle-position correcting unit with a reference data in order to define a compensation value to be applied to the optical system; and, a unit controller adapted to control the correction unit to allow the correction unit to adjust the position of the optical system in accordance with the compensation value from the data comparator; and, the correction unit comprises at least two electric motors mounted to an outer periphery of the optical system to correct the position of the optical system in the X-axis direction and the Y-axis direction, respectively.