Patent ID: 7509623

Claim:
A manufacturing method of a semiconductor device comprising: preparing design data in which patterns to be formed on a semiconductor wafer are designed for respective layers; inputting the design data for each layer, thus preparing mask data for each pattern included in the design data, the preparing the mask data including: (1) executing a first correction for one or a plurality of first edges meeting a condition for optical proximity effect among edges constituting a designed pattern, by calculating one or a plurality of first correction values, each having a value conforming to the condition and correcting one or the plurality of first edges with the calculated one or plurality of first correction values; and (2) executing a second correction for a second edge which does not meet the condition, by correcting the second edge with a second correction value, the second correction value being equal to one of the first correction values, which corresponds to one of the first edges adjacent to the second edge, thus connecting the corrected one of the adjacent first edges and the corrected second edge by a line segment; preparing a mask based on the mask data; and transferring the pattern onto the semiconductor wafer by use of the mask.