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