A transistor has a JFET gate region of {HEAD ~ a first conductivity type} formed at the face of a semiconductor layer to laterally and downwardly surround a drift region of {TAIL ~ a second conductivity type} 
A transistor has a JFET gate region of { HEAD ~ a first conductivity type } formed at the face of a semiconductor layer to laterally and downwardly surround a drift region of { TAIL ~ a second conductivity type }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL