Patent ID: 7847272
Filing Date: 2010-12-07
Classification: B82Y,G03F,H01J

Abstract:
1. An electron beam exposure system comprising: an electron beam generation unit for generating an electron beam; an electron beam exposure mask having opening portions for proximity effect correction, the opening portions being arranged so that sizes of the opening portions change at a predetermined rate in order of arrangement; a mask deflection unit for deflecting the electron beam on the electron beam exposure mask; a substrate deflection unit for deflecting the electron beam passed through the electron beam exposure mask and projecting the electron beam onto a substrate; and a control unit for controlling deflection amounts in the mask deflection unit and the substrate deflection unit; wherein said control unit controls to perform an exposure operation on a peripheral portion of a device formation pattern by superimposing the electron beam exposure mask having said opening portions, and wherein the exposure is performed in a state where the electron beam is thrown out of focus to prevent a pattern of said opening portions from being resolved, and an amount of light exposure is adjusted with an auxiliary exposure mask to change a slope angle of energy distribution in order to equalize energies reaching a threshold of development.