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