{HEAD ~ The thin film copolymer structure} 4 wherein {TAIL ~ the block copolymer material} comprises a diblock copolymer 
{ HEAD ~ The thin film copolymer structure } 4 wherein { TAIL ~ the block copolymer material } comprises a diblock copolymer
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH