abstract |
A structure containing a Sn layer or a Sn alloy layer includes a substrate, a Sn layer or Sn alloy layer formed above the substrate, and an under barrier metal formed between the substrate and the Sn layer or Sn alloy layer in the form of a single metal layer containing any one of Fe, Co, Ru and Pd, or an alloy layer containing two or more of Fe, Co, Ru and Pd. |