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