Patent ID: 7063923
Filing Date: 2006-06-20
Classification: G03F

Abstract:
1. An optical proximity correction (OPC) method for reducing optical proximity effect occurring in a pattern transferring process, the method comprising: providing a photo-mask; providing an original photo-mask pattern predetermined to be formed on a surface of the photo-mask, the original photo-mask pattern comprising at least one integrated circuit layout composed of dense figures and at least one isolated figure; providing a plurality of dummy patterns to surround the isolated figure to reduce the difference in pattern density of the original photo-mask pattern, a transmitted light of the dummy patterns providing a phase difference of 0 or 180 degrees relative to a transmitted light of the integrated circuit layout, and the integrated circuit layout and the plurality of dummy patterns together composing a corrected photo-mask pattern; and forming the corrected photo-mask pattern on the surface of the photo-mask.