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