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