Current in {HEAD ~ the sensor} is confined to regions close to {TAIL ~ the air bearing surface} by an insulator layer to enhance reader sensitivity 
Current in { HEAD ~ the sensor } is confined to regions close to { TAIL ~ the air bearing surface } by an insulator layer to enhance reader sensitivity
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH