In this study, we investigated the electro-optical (EO) characteristic of fringe-field switching (FFS) mode cell by the ion beam alignment method on the alpha-C.H thin film. The suitable inorganic thin films for FFS cell and the aligning capabilities of nematic liquid crystal (NLC) using the new alignment material of alpha-C.-H thin film were studied. An excellent voltage-transmittance (V-T) and response time curve of the ion beam aligned FFS cell was observed with oblique ion beam exposure on the alpha-C.H thin films. Also, the V-T hysteresis characteristics of the ion beam-aligned FFS cell with IB exposure on the alpha-C.H thin films is almost the same as that of the rubbing-aligned FFS cell on a polyimide (PI) surface.