Patent ID: 7480890

Claim:
A method for correcting an optical mask pattern comprising: providing a test optical mask having a plurality of original patterns configured according to original drawing data; transferring the original patterns to a first photo-resistant layer corresponding to forming of a plurality of first post-development patterns, and measuring first dimensions of all of each of the first post-development patterns; conducting a pattern shrink process to the first post-development patterns corresponding to forming of a plurality of first post-shrinkage pattern, and measuring second dimensions of all of each of the first post-shrinkage patterns; calculating a bias value between the first dimensions and the second dimensions, and collecting data of the original patterns, the first dimensions, the second dimensions and the bias value for obtaining a database; building an optical proximity effect correction (OPC) module in accordance with the database; and correcting the original drawing data according to the OPC module so as to obtain a corrected drawing data.