a first field oxide region, which is formed on {TAIL ~ the upper surface}, and is located in {HEAD ~ the high voltage} well from to view 
a first field oxide region , which is formed on { TAIL ~ the upper surface } , and is located in { HEAD ~ the high voltage } well from to view
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH