a first conductive layer formed on the first insulating layer in opposing relation to the top surface of third semiconductor layer, the side surfaces of {TAIL ~ the second and third semiconductor layers} and {HEAD ~ the top surface} of the first semiconductor layer; and 
a first conductive layer formed on the first insulating layer in opposing relation to the top surface of third semiconductor layer , the side surfaces of { TAIL ~ the second and third semiconductor layers } and { HEAD ~ the top surface } of the first semiconductor layer ; and
OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH