An anode region of {HEAD ~ the first conductivity type} is formed adjacent the second gate structure in a portion of {TAIL ~ the source/base region} 
An anode region of { HEAD ~ the first conductivity type } is formed adjacent the second gate structure in a portion of { TAIL ~ the source / base region }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL