Where only the coating material is coated on an area of a substrate, the thickness profile is taken as {HEAD ~ the thickness} of {TAIL ~ the coating material} alone 
Where only the coating material is coated on an area of a substrate , the thickness profile is taken as { HEAD ~ the thickness } of { TAIL ~ the coating material } alone
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH