In one aspect, {HEAD ~ such layer} is deposited over emitters of {TAIL ~ a field emission display} 
In one aspect , { HEAD ~ such layer } is deposited over emitters of { TAIL ~ a field emission display }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL