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