Patent ID: 8214166

Claim:
A method of calibrating measured data between different measuring tools, comprising the steps of: measuring a plurality of measurements of a Critical-Dimension (CD) of an object, and roughness data of the object, by using a Critical-Dimension Scanning Electron Microscopy (CD-SEM) tool at different locations on the object; calculating an average of, and a dispersion of, the CD values measured by the CD-SEM; calculating a number of cross section measurement points of the object required for calibration; measuring the object at the calculated number of cross section measurement points of the object, by using a cross section measuring tool at the calculated number of cross section measurement points of the object; calculating an average CD value at a specified desired measurement height, based on the obtained cross section measurements of the object; and calculating a calibration correction value, that is a function of a difference between the average CD value as measured by the CD-SEM measurement, and the average CD value at a specified desired measurement height of the object as measured by the cross section measuring tool.