Patent ID: 6711733
Filing Date: 2004-03-23
Classification: G03F

Abstract:
A system for evaluating mask patterns, comprising:a pattern image generator configured to generate a pattern image of mask patterns to be formed on a mask; a defect generator configured to receive defect data for particles and imaginarily generate defects on the mask according to the defect data; a pattern-defect image generator configured to generate a pattern-defect image of the mask by combining the generated pattern image with the generated defects; a rule database configured to store pattern rules; a pattern tester configured to determine whether or not each of the generated defects in the pattern-defect image is allowable according to the pattern rules, the pattern tester configured to classify each of the generated defects into an allowable defect, an unallowable defect, or an irrelevant defect; and a ratio computation unit configured to compute at least one of an allowable ratio and an unallowable ratio according to a determination result from the pattern tester.