the insulative diffusion barrier layer has oxygen, silicon and {HEAD ~ nitrogen} as {TAIL ~ main constituent elements}, a concentration of the nitrogen being from 0.5 to 12.5 atm % 
the insulative diffusion barrier layer has oxygen , silicon and { HEAD ~ nitrogen } as { TAIL ~ main constituent elements } , a concentration of the nitrogen being from 0.5 to 12.5 atm %
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH