According to the second aspect of the present invention, {HEAD ~ an intermediate layer} mainly composed of Si or {TAIL ~ Ge} is provided between the substrate and a diamond like carbon film 
mainly composed of
According to the second aspect of the present invention , { HEAD ~ an intermediate layer } mainly composed of Si or { TAIL ~ Ge } is provided between the substrate and a diamond like carbon film
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH