In {TAIL ~ this exemplary embodiment}, N type conductivity determining {HEAD ~ ions}, such as phosphorus or arsenic, are implanted 
In { TAIL ~ this exemplary embodiment } , N type conductivity determining { HEAD ~ ions } , such as phosphorus or arsenic , are implanted
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH