It also eliminates any ring around the top side of the target, allowing {HEAD ~ the entire area} of {TAIL ~ the cathode} to provide the coating 
of
It also eliminates any ring around the top side of the target , allowing { HEAD ~ the entire area } of { TAIL ~ the cathode } to provide the coating
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH