D26 Surface characterization of semiconductor wafer by using frequency resolved optical gating

Abstract

We proposed a novel optical surface inspection method to investigate the surface defects of semiconductor wafer. A novel phase characterizing method, which is based on a cross correlation frequency resolved optical gating method, is applied to evaluate the surface nano structure of semiconductor wafer. In this paper, we describe the principle of the method and the component of originally developed equipment to evaluate the nano surface texture by using hybrid X-FROG method.