| http://www.w3.org/ns/prov#value | - Though not particularly restrictive, the insulating layer bonded to one or both surfaces of the metal foil may be made, for instance, of inorganic materials such as inorganic oxides, inorganic nitrides, etc.; plastics such as polyesters (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc.), polystyrenes, polycarbonates, polyether sulfones, polyarylates, allyldigl
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