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