Patent ID: 8423923

Claim:
An optical proximity correction method, comprising: providing a target pattern; decomposing the target pattern into a first pattern and a second pattern, wherein the first pattern and the second pattern are alternately arranged and parallel to each other along a first direction in a dense region, wherein the first pattern includes a first edge pattern closest to the edge of the dense region and the second pattern includes a second edge pattern closest to the edge of the dense region; performing a first modification process thereby making the first pattern become a first revised pattern, wherein the first modification process comprises providing a first compensation pattern located adjacent to the first edge pattern, wherein a projection of the first compensation pattern along a second direction completely overlaps the first edge pattern to avoid the first edge pattern from being influenced by an optical proximity effect; performing a second modification process thereby making the second pattern become a second revised pattern; outputting the first revised pattern onto a first mask; and outputting the second revised pattern onto a second mask.