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