Patent ID: 7418682
Filing Date: 2008-08-26
Classification: G06F

Abstract:
1. A method of performing a check of width-dependent spacing rules, comprising: identifying a set of spacing rules for the IC design, wherein each spacing rule is associated with at least two edge values; performing a first verification pass through an IC design to identify information about a first edge of a first object in the IC design and a second edge of a second object in the IC design, wherein the identified information for the first edge is stored as a first edge value and the identified information for the second edge is stored as a second edge value, wherein the first verification pass comprises a first discrete set of verification operations applied against the objects in which the information comprises width information and direction information; performing a second verification pass to analyze a spacing between the first edge and the second edge, wherein the spacing is checked by matching the first and second edge values identified during the first verification pass against the identified spacing rules based upon the identified associated edge values, wherein the second verification pass comprises a second discrete set of verification operations applied against the objects and width dependent spacing rules are identified in which the width dependent spacing rules are analyzed relative to the information about the edges; and displaying a result of the analysis or storing the result in a tangible medium.