{HEAD ~ The function} of the P type well 57 b is to reduce {TAIL ~ the impact} of the N type buried layer 58 a on the body region 57 
is to reduce
{ HEAD ~ The function } of the P type well 57 b is to reduce { TAIL ~ the impact } of the N type buried layer 58 a on the body region 57
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH