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