Patent ID: 7488957

Claim:
A method for writing a pattern on a workpiece, comprising: providing a support structure holding the workpiece; emitting electromagnetic radiation toward the workpiece; storing data describing geometrical elements in the pattern; deflecting and focusing the electromagnetic radiation in a first direction relative to the workpiece; modulating a power of the electromagnetic radiation according to the stored data; moving a guiding rail in the first direction in a continuous or stepwise manner relative to the position of the support structure holding the workpiece, and moving a carriage along the guiding rail and in a second direction in a continuous or stepwise manner relative to the position of the support structure, the second direction being substantially perpendicular to the first direction, wherein an optical head used for writing the pattern on the workpiece is mounted on the movable carriage; and exposing the pattern on the workpiece; wherein the workpiece is kept at a fixed position during exposure.