In {TAIL ~ an embodiment}, the non conductive barrier region 38 is {HEAD ~ a shallow trench isolation area} 
In { TAIL ~ an embodiment } , the non conductive barrier region 38 is { HEAD ~ a shallow trench isolation area }
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD