{TAIL ~ These openings} are then filled with conductive material to form self aligned contacts in {HEAD ~ the core region} 
{ TAIL ~ These openings } are then filled with conductive material to form self aligned contacts in { HEAD ~ the core region }
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD