Patent Document ID: 20050238221
Application ID: 11110915
Patent Status: 0

Claim One:
1. A method of manufacturing a photo mask, comprising: detecting a defect of a pattern formed on the photo mask; acquiring a pattern image of a first region on the photo mask including the defect; extracting a pattern contour from the acquired pattern image to acquire pattern contour extracted data; producing first graphic data based on the pattern contour extracted data and a pixel size on the photo mask; acquiring pattern data including the first region and corresponding to a second region from design data of the photo mask; producing second graphic data from the acquired pattern data; replacing the second graphic data with the first graphic data to produce third graphic data only in a region where the first graphic data is superimposed upon the second graphic data; producing transfer patterns of pattern shapes represented by the second and third graphic data; and comparing the transfer patterns to judge whether or not the defect needs to be corrected.