{HEAD ~ This body} spaces a source region of the second conductivity type from {TAIL ~ the drift region} 
{ HEAD ~ This body } spaces a source region of the second conductivity type from { TAIL ~ the drift region }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL