Patent ID: 7931760
Filing Date: 2011-04-26
Classification: B32B,C22C,C23C,H01L,Y10T

Abstract:
1. A plating method comprising: forming a first plating film with a thickness of 0.05 μm to 3.0 μm and containing tin as a major component over a base formed of a copper-based material containing copper as a major component; after the formation of the first plating film, performing water rinsing and acid activation on the first plating film; applying a thermal process to the first plating film at 100° C. to 150° C. after the acid activation to form a tin-copper compound barrier film from the first plating film, by changing over 96% of the thickness of the first plating film into the tin-copper compound barrier film consisting of Cu forming a second plating film containing tin as a major component over the tin-copper compound barrier film.