Patent ID: 7158239
Filing Date: 2007-01-02
Classification: G01B

Abstract:
1. A method for studying a surface by reflectometry, comprising: projecting a radiation on the surface; collecting a measurement spectrum of the radiation after reflection of the radiation on the surface and displaying the spectrum on a graphic medium; selecting points of the spectrum, the points configured to be joined by lines approaching the spectrum; and seeking relief features of the surface by comparisons of selected points of the measurement spectrum with homologous points of a test spectrum, the test spectrum coming from a simulated reflection of the radiation on a test surface resulting from modeling the relief as expressed by parameters, and comprising adjustments of the comparisons and of the test spectrum by adjustments of the parameters, wherein the parameters are successively adjusted in an order determined by a sensitivity of the test spectrum to the parameters, most influential of the parameters on the spectrum being adjusted first and so forth.