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