Patent ID: 7240307
Filing Date: 2007-07-03
Classification: G03F

Abstract:
1. A pattern size correcting device for correcting size variation that occurs in an actual device pattern formed in photolithography depending on an open area ratio, wherein said open area ratio is a ratio of light transmitting areas in an area within a set distance in a prescribed place, wherein said prescribed place is a formed place of said actual device pattern, said device comprising: a testing photomask having a test pattern; a quantifying unit that quantifies, using said testing photomask, the size variation in the test pattern as a function of distance and in relation to the open area ratio which is defined by said testing photomask; an open area ratio calculating unit that divides an exposure area having the plural actual device patterns into a plurality of correction areas and calculates effective said open area ratio of the respective correction areas; and a data correcting unit that inputs the open area ratio calculated by said open area ratio calculating unit to a result of the quantification, calculates the size variations of the actual device patterns in the respective correction areas and corrects design data of the actual device patterns based on the size variation calculation.