Measuring thickness based on the grayscale value of C-mode SAM images

Scanning acoustic microscopy is an analysis tool capable for revealing the inner structure of the samples and detecting inhomogeneities inside them, for material characterization and for measuring the thickness of a given layer. A standard method for thickness measurements is based on observing a so called A-mode echo signal. In this paper the authors present pilot results of a method for thickness measurements based on analyzing the grayscale value of the C-mode image. The method can be used only under certain circumstances, but has the advantage to estimate the thickness of a layer using only the C-mode image.