Patent ID: 6724463
Filing Date: 2004-04-20
Classification: B60R,G03F

Abstract:
A scanning exposure apparatus in which a substrate is exposed by synchronously moving a mask and the substrate, the apparatus comprising:a beam source which emits pulses of an exposure beam in response to trigger signals output; a projection system disposed in a path of the exposure beam from the beam source and which projects an image of a pattern formed on the mask onto the substrate, the mask to be disposed on one side of the projection system and the substrate to be disposed on another side thereof; a stage disposed on the one side or the other side of the projection system and which is movable in a scanning direction while holding the manic or the substrate, respectively; an interferometer operatively connected to the stage and which outputs a measurement value corresponding to positional information of the stage in the scanning direction; and a controller that controls generation of a series of the trigger signals using a time synchronization trigger method in which the series of the trigger signals are generated at predetermined time intervals, and a start timing of the series of trigger signals is determined based on the measurement value from the interferometer.