Patent ID: 7546564

Claim:
A method for making a semiconductor device using an illuminating system having a directionality, the method comprising: obtaining an original design associated with a semiconductor device: performing optical proximity correction on the original design to obtain a revised design; extracting first deviation patterns by comparing the revised design and the original design with each other, wherein the first deviation patterns are defined as a first difference between first edges of the revised design and the original design, the first difference being in a first direction that is parallel to a direction axis of the illumination system: extracting second deviation patterns by comparing the revised design and the original design with each other, wherein the second deviation patterns are defined as a second difference between second edges of the revised design and the original design. the second difference being along a second direction that is not parallel to the direction axis of the illumination system: determining whether a first error of the optical proximity correction exists on the first deviation patterns by a first reference value: and determining whether a second error of the optical proximity correction exists on the second deviation patterns by a second reference value, wherein the first reference value is different from the second reference value according to the directionality of the illumination system.