{HEAD ~ A first blocking layer} is formed of amorphous silicon carbide or {TAIL ~ amorphous silicon nitride} on a conductive substrate 
is formed of
{ HEAD ~ A first blocking layer } is formed of amorphous silicon carbide or { TAIL ~ amorphous silicon nitride } on a conductive substrate
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH