During the forward bias condition {TAIL ~ minority carriers} are injected into the semiconductor substrate adjacent to {HEAD ~ the gate electrode structure} 
During the forward bias condition { TAIL ~ minority carriers } are injected into the semiconductor substrate adjacent to { HEAD ~ the gate electrode structure }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD