Patent ID: 6509127
Filing Date: 2003-01-21
Classification: B82Y,G03F,H01J,Y10S

Abstract:
A scattering-angle limiting type electron-beam exposure method in which a mask having a scattering region is used, and a limiting aperture is set to control the amount of scattered electrons that are scattered by said mask to pass through, whereby a scattering contrast is formed from differences in the scattering angles of electrons within the electron beam having passed through said mask, and thereby pattern exposure is performed; whereinby changing the thickness of the scattering region of the mask according to the pattern density, the scattering angles of the scattered electrons are controlled and the amount of the scattered electrons to pass through the limiting aperture is adjusted, and, using these scattered electrons after passing through said limiting aperture for the correction exposure, the proximity effect correction is simultaneously performed during the pattern exposure.