Patent ID: 7340706
Filing Date: 2008-03-04
Classification: G03F

Abstract:
1. A method for analyzing the quality of an optical proximity correction (OPC) mask, the method comprising: receiving a target layer from a target design; receiving an OPC mask layer from the OPC mask; classifying each cell of at least one of the target layer and the OPC mask layer as either repeating or non-repeating; for each repeating cell, recognizing geometric points in the target layer to determine quality measuring groups and wherein the recognizing comprises: identifying geometric points in features of the target design to be used for OPC mask layer calculations; and outputting the geometric points in the form of the OPC quality measuring groups; simulating the OPC mask layer based on the quality measuring groups; measuring edge placement errors (EPEs) based on at least one of the geometric points; and providing an EPE layer representing EPEs greater than an EPE threshold.