Complex sentence: They are thin film coatings which consist predominantly of the chemical element carbon, which include plasma polymer films, amorphous carbon films (diamond-like carbon, DLC), CVD diamond films as well as graphite films.
Split into simpler sentences: They are thin film coatings which consist predominantly of the chemical element carbon. Which include plasma polymer films, amorphous carbon films (diamond-like carbon, DLC), CVD diamond films as well as graphite films.