Patent ID: 7759027
Filing Date: 2010-07-20
Classification: B82Y,G03F,G06F,H01J,Y02P,Y10S

Abstract:
1. A method for fracturing or mask data preparation or proximity effect correction comprising the steps of: inputting patterns to be formed on a surface, a subset of the patterns being slightly different variations of each other; and selecting a set of characters, some of which are non-simple characters, to be used to form the number of patterns using a set of shots; wherein shot count or total write time is reduced by use of a character varying technique comprising at least one of the group consisting of 1) varying a dosage of a character shot in the set of shots; 2) varying an overlap of a plurality of character shots in the set of shots; 3) applying partial exposure of a non-simple character in the set of characters; and 4) varying the position of a character shot in the set of shots with respect to another character shot in the set of shots to form a pattern in the subset of patterns which are slightly different variations of each other, wherein the pattern is curvilinear.