Patent ID: 6539521
Filing Date: 2003-03-25
Classification: G03F

Abstract:
A method of correcting for proximity effects associated with an edge of a polygon in a layout, the method comprising:receiving a first target length (Lcor) for corner segments, a second target length (Ldet) for non-corner segments, and a plurality of characteristics of the edge including edge length L, line end, and turn end; determining whether the edge is a short edge using the plurality of characteristics, Lcor, and Ldet; using a first algorithm for providing dissection points and placing an evaluation point on the edge, if the edge is a short edge; using a second algorithm for dissecting the edge into segments, providing dissection points between the segments, and placing evaluation points on the segments, if the edge is longer than a short edge; and responsive to the providing and placing, correcting the edge for proximity effects.