Patent ID: 9116434
Filing Date: 2015-08-25
Classification: G03F,H01J

Abstract:
1. An electron beam exposure method comprising the steps of: preparing an exposure mask including a linear opening pattern, a gap opening pattern configured by two parallel openings with a gap therebetween, and a circular opening pattern having a diameter equal to a width of the linear opening pattern; drawing a linear portion of a drawing object pattern by repeating exposure with an electron beam passing through the linear opening pattern; drawing a curved portion of the drawing object pattern by repeating exposure with an electron beam passing through the circular opening pattern while shifting and overlapping exposure positions of the electron beam; and drawing a gap portion of the drawing object pattern by one exposure operation with an electron beam passing through the gap opening pattern, wherein in drawing a junction between the curved portion and the linear portion of the drawing object pattern, the curved portion is drawn in such a manner that a position of a rectangular electron beam to be delivered to the circular opening pattern is adjusted depending on the exposure positions to prevent the electron beam from entering the liner portion from the curved portion.