{HEAD ~ wherein at least a portion} of the surface on the periphery of the metal wiring has {TAIL ~ a region} made of a material comprising copper as a main ingredient, 
has
{ HEAD ~ wherein at least a portion } of the surface on the periphery of the metal wiring has { TAIL ~ a region } made of a material comprising copper as a main ingredient ,
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH