Patent Document ID: 20160070971
Application ID: 14837347
Patent Status: 0

Claim One:
1. An inspection method comprising: placing a sample, in which a plurality of graphic patterns are arranged, on a stage of an inspection apparatus; dividing an inspection region of the sample into a plurality of stripe regions, and dividing the inspection region into a plurality of groups so that a plurality of continuously arranged stripe regions constitutes one group; acquiring optical images of graphic patterns arranged in all stripe regions while measuring position coordinates of the stage using a laser interferometer, wherein the step for acquiring optical images comprises acquiring an optical image of a graphic pattern arranged in a stripe region of one of the groups while moving the stage in a longitudinal direction of the stripe region, moving the stage in a lateral direction of the stripe region, and acquiring an optical image of a graphic pattern arranged in a stripe region of a group different from one of the groups in which the optical image is acquired, and in a stripe region not continuous to the stripe region whose optical image is acquired immediately before the movement in the lateral direction while moving the stage in the longitudinal direction of the stripe region; obtaining the position coordinates of the graphic pattern from a measurement value of the position coordinates of the stage, the optical image of the graphic pattern, and a reference image generated from design data of the graphic pattern, obtaining a misplacement amount between the optical image and the reference image based on the position coordinates of the graphic pattern, and obtaining first misplacement information of a relationship between the misplacement amount and an acquiring order of the optical images; obtaining second misplacement information that is an approximate curve of the first misplacement information; obtaining third misplacement information that is a difference between the first misplacement information and the second misplacement information; and obtaining fourth misplacement information of a relationship between a misplacement amount in the third misplacement information and design position coordinates obtained from the design data.