Patent ID: 8953868
Filing Date: 2015-02-10
Classification: G06T

Abstract:
1. A defect inspection method comprising: an inspection image acquisition step to pick up an image of a subject under inspection to thereby acquire an inspection image; a template extraction step to extract a plurality of templates corresponding to a plurality of regions, respectively from design data of the subject under inspection; a first misregistration-amount calculating step to find the first misregistration-amount between the inspection image and the design data using a first template as any one template selected from among the plural templates; a second misregistration-amount calculating step to find the second misregistration-amount between the inspection image and the design data using a second template other than the first template, the second template being selected from among the plural templates, and the first misregistration-amount; and a defect-inspection step to convert the design data, misregistration thereof being corrected using the first misregistration-amount, and the second misregistration-amount, into a design data image, and to compare the design data image with the inspection image to thereby detect a defect of the subject under inspection.