a layer of a second conductive metallization on either side of the pair of {HEAD ~ layers} of {TAIL ~ the electrodisplacive material} 
of
a layer of a second conductive metallization on either side of the pair of { HEAD ~ layers } of { TAIL ~ the electrodisplacive material }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL