Patent ID: 6541784
Filing Date: 2003-04-01
Classification: B82Y,H01J

Abstract:
Exposing method using an electron beam for irradiating a substrate with the electron beam and exposing exposure patterns on the substrate, comprising the steps of:(a) dividing the specimen into virtual meshes having a predetermined dimension; (b) calculating an area density of a drawing pattern for each virtual mesh; (c) calculating an area density map of a total of a drawing region of the specimen and storing the area density map in a memory; (d) calculating a modified area density by executing a correction for the area density in consideration of a back-scattering energy and a forward-scattering energy in a resist of the specimen caused by the electron beam to calculate a modified area density; (e) calculating a modified area density map of the total of the drawing region and storing the modified area density map in the memory; and (f) repeating the steps (d) and (e) at least twice to determine an exposure dose on the specimen.