{HEAD ~ A common connection device} is formed for the first dopant zone and {TAIL ~ the second dopant zone} 
is formed for
{ HEAD ~ A common connection device } is formed for the first dopant zone and { TAIL ~ the second dopant zone }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL