{HEAD ~ The conductive film} 9 functions as a switch for controlling the amount of {TAIL ~ electrons} emitted from the field emission tip 6 
{ HEAD ~ The conductive film } 9 functions as a switch for controlling the amount of { TAIL ~ electrons } emitted from the field emission tip 6
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH