The goal of this project is to model a thin film capacitor where black silicon is to be used as the parallel plates. My initial task is to look at different samples of Black silicon surfaces and be able to find out the correlation length and standard deviation of these samples. Second task is to find the surface area in terms of sigma and the correlation length. A typical surface would consist of periodic cones and the task is to calculate the surface area of these cones considering n number of cones in the surface. The base is a rectangle and the cones sit inverted on it. The area of interest is the curved surface area of the cones and the area between the cones because of the gap between them. The task is to calculate the surface area considering the gap to be uniform and all cones identical. This area must be in terms of sigma and correlation length of surface so that other samples of varying length and radius of cones with non-uniform gap can be considered for surface area calculation. Finally, a matlab code with inputs of correlation length and sigma must output the surface area.