abstract |
The structure including the Sn layer or the Sn alloy layer according to the present invention comprises: a substrate 10; Sn layer or Sn alloy layer 12 formed on the substrate; Under-barrier metal 11, which is a single metal layer made of any one of Fe, Co, Ru, Rh, and Pd formed between the substrate 10 and the Sn layer or the Sn alloy layer 12, or an alloy layer made of two or more ; It is equipped with. |