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