Patent ID: 7741614

Claim:
A lithography system that deflects a beam to draw a desired pattern on a sample, the system comprising: a beam optical system that includes a deflector to deflect the beam; a driving unit that drives the deflector; a data generation circuit programmed or configured to generate main deflector data to deflect the beam to one of a plurality of sections, the sections being made by dividing patterning data representing a pattern to be drawn; a stage enabled to mount the sample; a position detector to detect a position of the stage to obtain stage position information; a window-frame judgment unit programmed or configured to judge that the section to be drawn has entered a window-frame area where the beam may be scanned according to the main deflector data and the stage position information to output a judgment signal; a main deflector calculator programmed or configured to receive the main deflector data as input in parallel with the window-frame judgment unit and to calculate calculation data for driving the driving unit based on the main deflector data in parallel with the judgment in the window-frame judgment unit; and a transfer controller programmed or configured to detect output of the judgment signal and completion of drawing in the section under drawing, to receive a transfer of the calculation data from the main deflector calculator, and to transfer the calculation data to the driving unit.