LEAD-FREE SOLDER ALLOY, SOLDER JOINING MATERIAL, ELECTRONIC CIRCUIT MOUNTING BOARD, AND ELECTRONIC CONTROL DEVICE

There is provided a lead-free solder alloy comprising 2.0% by mass or more and 4.0% by mass or less of Ag, 0.3% by mass or more and 0.7% by mass or less of Cu, 1.2% by mass or more and 2.0% by mass or less of Bi, 0.5% by mass or more and 2.1% by mass or less of In, 3.0% by mass or more and 4.0% by m...

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Bibliographische Detailangaben
Hauptverfasser:	ARAI Masaya, KATSUYAMA Tsukasa, SHIMAZAKI Takanori, NAKANO Takeshi, MUNEKAWA Yurika
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ALLOYS CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY FERROUS OR NON-FERROUS ALLOYS MACHINE TOOLS MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY PERFORMING OPERATIONS PRINTED CIRCUITS SOLDERING OR UNSOLDERING TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	There is provided a lead-free solder alloy comprising 2.0% by mass or more and 4.0% by mass or less of Ag, 0.3% by mass or more and 0.7% by mass or less of Cu, 1.2% by mass or more and 2.0% by mass or less of Bi, 0.5% by mass or more and 2.1% by mass or less of In, 3.0% by mass or more and 4.0% by mass or less of Sb, 0.001% by mass or more and 0.05% by mass or less of Ni, 0.001% by mass or more and 0.01% by mass or less of Co, and the balance being Sn so that heat fatigue resistance properties can be exhibited even in an environment with very severe temperature variations, for example from -40°C to 175°C, and the progress of a crack occurring in the solder joint can be suppressed even in a harsh environment where such very severe temperature variations and vibration are loaded.