{HEAD ~ the making}, on {TAIL ~ the magnetic material} and the insulating material 8, of an insulating layer 8 having, at its center, a part M which has no insulating material and leaves the magnetic material free 
on
{ HEAD ~ the making } , on { TAIL ~ the magnetic material } and the insulating material 8 , of an insulating layer 8 having , at its center , a part M which has no insulating material and leaves the magnetic material free
HEAD HEAD HEAD HEAD HEAD HEAD OTH 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH