a second metallic material provided on {HEAD ~ a surface} of {TAIL ~ the thermoplastic substrate} opposite the first metallic material 
of
a second metallic material provided on { HEAD ~ a surface } of { TAIL ~ the thermoplastic substrate } opposite the first metallic material
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH