Patent ID: 6483937
Filing Date: 2002-11-19
Classification: G06T,H01L

Abstract:
A process for inspecting an object, comprising the steps of:providing a first and a second master pattern of the object, the first and second master patterns differing from each other; determining a first mismatch between the first pattern of the object and the first master pattern exceeding a first criterion, the first criterion representing a first level of sensitivity to defects in the object, wherein the first criterion is a measurement of distance and determining a second mismatch between the second pattern of the object and the second master pattern exceeding a second criterion, the second criterion representing a second level of sensitivity to defects in the object, wherein the second criterion is a measurement of distance wherein the first pattern represents areas of the object that are more critical than the areas represented by the second pattern; and responsive to the first and second mismatches scrapping or repairing the object.