{HEAD ~ An insulator layer} partially covers the trilayer stack such that {TAIL ~ a current} passing through the stack is confined to the vicinity of the air bearing surface to increase sensitivity 
{ HEAD ~ An insulator layer } partially covers the trilayer stack such that { TAIL ~ a current } passing through the stack is confined to the vicinity of the air bearing surface to increase sensitivity
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH