{HEAD ~ Adhesion} between the substrate and the diamond like carbon film is improved by {TAIL ~ such an intermediate layer} 
is improved by
{ HEAD ~ Adhesion } between the substrate and the diamond like carbon film is improved by { TAIL ~ such an intermediate layer }
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL