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