A study of the morphology of 3C-SiC layers grown at different C/Si ratios

A comparative study of the morphology of 3C-SiC films prepared with different C:Si ratios is presented. The silane precursor controls the growth rate at all values of C:Si ratio but combined observations using Atomic Force Microscopy and Scanning Electron Microscopy indicate that the C:Si ratio is critical in determining the grain size and faceting at C:Si values close to 1. Makyoh topography reveals various surface defects, a slight mesoscale roughness and bending of the epiwafers.