A verification method is disclosed. A first entity pattern and a second entity pattern are provided, and a clearance exists between the first entity pattern and the second entity pattern. A third entity pattern is provided by starting from the first entity pattern and moving toward the second entity pattern according to a predetermined clearance value. By determining whether a partial overlap happens between the third entity pattern and the second entity pattern or not by interference inspection to verify whether the size of the clearance is within a safe range of a clearance design or not.
