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