Shallow trench isolation partially surrounds each transistor so as to further electrically isolate the source and drain {HEAD ~ regions} from {TAIL ~ the semiconductor body} 
from
Shallow trench isolation partially surrounds each transistor so as to further electrically isolate the source and drain { HEAD ~ regions } from { TAIL ~ the semiconductor body }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL