Patent ID: 8154595
Filing Date: 2012-04-10
Classification: G01B,G01N,G03F,H01J

Abstract:
1. A device for automatic detection of a possible incorrect measurement during the determination of the position and/or dimension of a structure on a substrate, the device comprises: at least one reflected light illumination apparatus and/or a transmitted light illumination apparatus; at least one imaging optical system and one detector of a camera for imaging the structures on the substrate; a first program portion linked to the detector of the, camera, wherein said detector is provided for determining the position and/or dimension of the structure on the substrate and wherein the device determines and records a plurality of measurement variables M a second program portion linked to the detector of the camera, wherein said second program portion calculates an analysis of the measurement variables M wherein the possible incorrect measurement is determined by examining a plurality of quality factors Q wherein the rule f