A contact region between the via and {HEAD ~ the section} of {TAIL ~ the metal layer} may define a crossbar array 
of
A contact region between the via and { HEAD ~ the section } of { TAIL ~ the metal layer } may define a crossbar array
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH