Patent ID: 7768626

Claim:
An exposure apparatus which forms a latent image pattern on a substrate using an exposure beam, said apparatus comprising: a first structure which supports a projection unit which projects an exposure beam onto a substrate; a first supporting leg which includes a first actuator and supports said first structure; a first state detector which detects a state of said first structure; a second structure which supports a substrate stage which aligns the substrate; a second supporting leg which includes a second actuator and supports said second structure; a second state detector which detects a state of said second structure; a compensator which generates a correction signal for synchronizing said first structure and said second structure with each other based on at least one of a first signal in accordance with a signal from said first state detector and a first target signal and a second signal in accordance with a signal from said second state detector and a second target signal; and a switch which selects one of operations including (i) an operation in which the correction signal is added to only a signal for controlling said first actuator, (ii) an operation in which the correction signal is added to only a signal for controlling said second actuator, and (iii) an operation in which the correction signal is added to both the signal for controlling said first actuator and the signal for controlling said second actuator.