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