Patent ID: 8129078

Claim:
A method for manufacturing a mask which is forming certain patterns by photolithography to a photosensitive material film formed on a substrate, comprising the steps of: extracting, out of rectangular aperture patterns having pattern edges parallel to an X axis and pattern edges parallel to a Y axis orthogonal to the X axis in an XY plane defined by the X and Y axes, two rectangular aperture patterns adjacent each other in a state in which a line segment joining the center of one of the rectangular aperture patterns and the center of the other rectangular aperture pattern is inclined with respect to the X axis; rotating each of the thus-extracted two rectangular aperture patterns at a certain angle in such a manner that a pattern edge corresponding to one side of one of the rectangular aperture patterns and a pattern edge corresponding to one side of the other rectangular aperture pattern are opposed in parallel to each other and can be spaced apart the longest distance; subjecting each of the two rectangular aperture patterns rotated at a certain angle to optical proximity effect correction to form two corrected aperture patterns; and performing, on the basis of the two corrected aperture patterns, electron beam exposure on a radiation sensitive resist material film stacked on a mask member formed on a certain substrate, thereby forming rectangular mask aperture patterns corresponding to the two corrected aperture patterns.