In one embodiment, {HEAD ~ the doped regions} can be self aligned using the first sub gates and isolation regions as {TAIL ~ implant masks} 
In one embodiment , { HEAD ~ the doped regions } can be self aligned using the first sub gates and isolation regions as { TAIL ~ implant masks }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL