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