Patent ID: 9221132
Filing Date: 2015-12-29
Classification: B23K,C22C,H05K

Abstract:
1. A tin-silver-copper solder alloy consisting of: tin, silver, copper, nickel, antimony, bismuth, and indium, and comprising no germanium except for a trace amount thereof contained as an unavoidable impurity, wherein relative to the total amount of the solder alloy, the silver content is more than 0.05 mass % and less than 0.2 mass %, the copper content is 0.1 mass % or more and 1 mass % or less, the nickel content is 0.01 mass % or more and 0.2 mass % or less, the antimony content is 0.01 mass % or more and less than 2.5 mass %, the bismuth content is 0.01 mass % or more and 4 mass % or less, the indium content is 0.005 mass % or more and 2 mass % or less, the tin content is the remaining content, and a mass ratio of the copper content to the nickel content (Cu/Ni) is less than 12.5.