Patent ID: 8302035

Claim:
A method for verifying an optical proximity correction of a target pattern layout, the method comprising: performing an optical proximity correction on the target pattern layout; performing a primary verification on the target pattern layout which has undergone the optical proximity correction to detect defect weak points, the primary verification comprising: setting a reference point of focus and exposure latitude values with respect to the target pattern layout which has undergone the optical proximity correction; setting a verification range by setting focus and exposure latitude values at predetermined ranges from the reference point; setting a critical dimension (CD) tolerance at which defects do not occur with respect to the set verification range; and extracting points, which are out of the CD tolerance, as defect weak points; performing a secondary verification on the defect weak points detected in the primary verification to detect hot spot points; performing an additional optical proximity correction on the hot spot points which are detected in the secondary verification; correcting the target pattern layout when defect weak points are detected; and transferring the corrected target pattern layout onto a wafer.