{HEAD ~ A third semiconductor region} of {TAIL ~ the first conductivity type} is disposed on the second semiconductor well and in electrical communication with the circuit electrode 
of
{ HEAD ~ A third semiconductor region } of { TAIL ~ the first conductivity type } is disposed on the second semiconductor well and in electrical communication with the circuit electrode
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH