a first impurity diffusion region in {HEAD ~ the cell array region} between {TAIL ~ the first and second gate electrodes} 
between
a first impurity diffusion region in { HEAD ~ the cell array region } between { TAIL ~ the first and second gate electrodes }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL