PS51 はんだ材の高サイクル疲労強度(フェロー賞対象ポスターセッション)

概要

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A large amount of 63Sn-37Pb has been used to mount the substrate of the electric circuit. Sn - Ag - Cu series solder materials are used as lead free solder materials that replaced it. However, the cost of Ag wiuich is an addition element is a problem. The vibration affects the cause of the accident in car electronics and an industrial instrument deeply. A lot of studies have been made on mechanical characteristics of Sn - Ag - Cu series solder materials, but it is not almost study of high cycle fatigue characteristics. In this paper, tensile strength and high cycle fatigue strength of Sn-3.0Ag-0.5Cu, Sn-1.0Ag-0.7Cu and Sn-0.7Cu were examined. Limit moment in a power device, soldering with lead free solder materials, were calculated by the general purpose stress strain analysis cede based on a large scale finite element method.
2010-10-09