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