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