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