A memory is encoded with a data structure that represents a pattern having a range for one or more dimensions and/or positions of line segments therein. The data structure identifies two or more line segments that are located at a boundary of the pattern. The data structure also includes at least one...http://www.google.de/patents/US7703067?utm_source=gb-gplus-sharePatent US7703067 - Range pattern definition of susceptibility of layout regions to fabrication issues
