Patent ID: 7777202

Claim:
An electron beam exposure apparatus comprising: an electron gun for generating an electron beam; a deflector for deflecting the electron beam; a wafer stage on which a wafer is placed; a stage position detector for detecting a position of the wafer stage; a memory in which an amount of the positional change is stored where the amount of the positional change corresponds to the movement velocity of the wafer stage; a stage position calculator for calculating a movement velocity of the wafer stage on a basis of a distance over which the wafer stage has moved, and on a basis of a time which it has taken for the wafer stage to move over the distance, the wafer stage having been detected by the stage position detector, subsequently for calculating an amount of positional change of the wafer stage with respect to an interpolation time which is shorter than a measurement cycle used by the stage position detector on a basis of the movement velocity thus calculated, thereafter for calculating an amount of positional movement of the wafer stage by sequentially adding the amount of the positional change to a position of the stage which is measured by the stage position detector in synchronism with the interpolation time, and thereby calculating an amount of deflection of the electron beam which corresponds to the amount of the positional movement of the wafer stage; and a deflection controller for causing the deflector to deflect the electron beam on a basis of the amount of deflection of the electron beam; wherein the stage position computing unit accesses the memory by a value corresponding to the movement velocity of the wafer stage as an address, and extracts the amount of the positional change corresponding to the movement velocity of the wafer stage from the memory.