The vertically integrated crossbar geometry of the three dimensional crossbar array may include {TAIL ~ multiple stacked horizontal metal lines} and {HEAD ~ vertical via lines} 
The vertically integrated crossbar geometry of the three dimensional crossbar array may include { TAIL ~ multiple stacked horizontal metal lines } and { HEAD ~ vertical via lines }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD