In certain embodiments, {HEAD ~ thin film structures} include ordered elements that do not correspond to {TAIL ~ the substrate pattern} 
In certain embodiments , { HEAD ~ thin film structures } include ordered elements that do not correspond to { TAIL ~ the substrate pattern }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL