{TAIL ~ a second gate electrode} of a second MOS transistor of {HEAD ~ a second conductivity type} formed on said primary surface of said substrate 
{ TAIL ~ a second gate electrode } of a second MOS transistor of { HEAD ~ a second conductivity type } formed on said primary surface of said substrate
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH