Drain region 542, source/base region 550, and {HEAD ~ cathode region} 558 are implanted as represented by {TAIL ~ the arrows} 602 
implanted as represented by
Drain region 542 , source / base region 550 , and { HEAD ~ cathode region } 558 are implanted as represented by { TAIL ~ the arrows } 602
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH