Patent ID: 7467064
Filing Date: 2008-12-16
Classification: G01N

Abstract:
1. A method of transforming metrology data from a semiconductor treatment system using multivariate analysis, the method comprising: a) obtaining a set of metrology data measured or simulated for one or more substrates treated using the treatment system wherein the set of metrology data includes a set of diffraction signals measured from illuminating a structure on a substrate; b) determining one or more essential variables for the obtained set of metrology data using multivariate analysis; c) obtaining a first metrology data measured or simulated for one or more substrates treated using the treatment system, wherein the first metrology data is not one of the metrology data in the set of metrology data obtained in a) wherein the first metrology data is a diffraction signal measured from illuminating a structure on a substrate; and d) transforming the first metrology data obtained in c) into a second metrology data using the one or more essential variables determined in b).