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