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