{HEAD ~ Upper shields} 218 are formed above the gaps via conventional processes, such as {TAIL ~ photolithographic deposition} or milling 
{ HEAD ~ Upper shields } 218 are formed above the gaps via conventional processes , such as { TAIL ~ photolithographic deposition } or milling
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH