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