A second semiconductor well of {TAIL ~ the first conductivity type} is disposed in {HEAD ~ the first semiconductor well} 
A second semiconductor well of { TAIL ~ the first conductivity type } is disposed in { HEAD ~ the first semiconductor well }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD