{HEAD ~ The second interconnect structure} is formed with {TAIL ~ a second interfacial structure} different from the first interfacial structure of the first interconnect structure 
is formed with
{ HEAD ~ The second interconnect structure } is formed with { TAIL ~ a second interfacial structure } different from the first interfacial structure of the first interconnect structure
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH