The bottom shield layer 10 and the top shield layer 30 {HEAD ~ each} function as {TAIL ~ both a magnetic shield} and an electrode that supplies power to the thin film magnetic head element 20 
function as
The bottom shield layer 10 and the top shield layer 30 { HEAD ~ each } function as { TAIL ~ both a magnetic shield } and an electrode that supplies power to the thin film magnetic head element 20
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH