A hard carbon film coated substrate includes in stacked sequence {HEAD ~ a substrate}, {TAIL ~ an intermediate layer}, and a hard carbon film 
A hard carbon film coated substrate includes in stacked sequence { HEAD ~ a substrate } , { TAIL ~ an intermediate layer } , and a hard carbon film
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH