Production manner of the lead free solder alloy and the lead free solder alloy, the implemental structure, implemental manner, production manner of the lead free fuse alloy and the lead free fuse alloy, the tabular fuse, Al 0.08 mass or less of 0.02 mass or more being added in

摘要

PROBLEM TO BE SOLVED: To provide lead-free solder alloy having a hypoeutectic composition with Sn as a base material in which coarse structure of primary crystal -Sn phase is refined, the hardness of the primary crystal -Sn phase is increased substantially as high as that of the eutectic phase, and the thermal fatigue characteristic together with the mechanical characteristic is improved by unifying the characteristics including the hardness of the structure.;SOLUTION: In the lead-free solder alloy, 0.01% and 0.1% Al, by weight, is added to the alloy of hypo-eutectic composition containing metal of one metal selected from a group consisting of Ag, In, Cu, Zn and Bi with Sn as a base metal. The lead-free solder alloy contains by weight 0.5% and 3% Ag, 1% and 8% In, 0.1% and 0.5% Cu, 1% and 5% Zn, and 1% Bi and 10% Bi.;COPYRIGHT: (C)2005,JPO&NCIPI