Patent ID: 6268906
Filing Date: 2001-07-31
Classification: G03F

Abstract:
An exposure apparatus for transferring a pattern on a mask to a substrate, comprising:a light source for emitting pulsed lights;an illumination optical system for illuminating said mask with said pulsed lights;a mask stage supporting said mask and being movable in a predetermined plane;a substrate stage supporting said substrate and being movable in a plane conjugate with said predetermined plane;a drive system for moving said mask stage and said substrate stage synchronously;an input device for inputting fluctuations of respective energies of said pulsed lights and fluctuations of light emission timing of said pulsed lights;a first calculating system for calculating the minimum number of pulses for said pulsed lights to be emitted to said substrate based on the fluctuations of said energies of said pulsed lights and the fluctuations of said light emission timing of said pulsed lights;a second calculation system for calculating a moving speed of said mask stage and said substrate stage based on said minimum number of pulses for said pulsed lights;a drive control system for controlling said drive system so as to move said mask stage and said substrate stage synchronously based on said calculated moving speed; anda control system for controlling said light source so as to emit said pulsed lights at regular intervals.