{HEAD ~ Device} 7 wherein {TAIL ~ said thin elements} have a thickness of from 30 to 80 nm 
wherein
{ HEAD ~ Device } 7 wherein { TAIL ~ said thin elements } have a thickness of from 30 to 80 nm
HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH