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