Patent ID: 8983113
Filing Date: 2015-03-17
Classification: G06K,G06T

Abstract:
1. An inspection device, which irradiates light to a sample formed with a pattern, forming an image of the sample on an image sensor through an optical system, and determines the presence of a defect, comprising: an optical image acquisition part which obtains an optical image of the sample from the image sensor; a first comparison part which compares the optical image with a reference image as a reference of the determination and, when a difference exceeds at least one of threshold values, determines that there is a defect; a transfer image estimation part which estimates by simulation an optical image obtained when each pattern of an optical image on the sample and the reference image is transferred by a transfer device; and a second comparison part which compares each of the transfer images and when a difference exceeds at least one of the threshold values, determines that there is a defect.