The top portion of the substrate can be {HEAD ~ a conductive layer} separated from {TAIL ~ the memory device} by the SOI oxide insulator film 
separated from
The top portion of the substrate can be { HEAD ~ a conductive layer } separated from { TAIL ~ the memory device } by the SOI oxide insulator film
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH