Dual FCVA-PECVD deposition for DLC films

In this paper, we demonstrate the incorporation of hydrogen in ta-C films synthesised by mixing FCVA and PECVD. The hydrogen incorporation is realised by introducing a CH4 flow during the FCVA process. We present in this paper a comparison between ta-C and ta-C:H in terms of average mass density and hardness of the films in order to study the hydrogen influence on structure and properties.