J0310205 高剛性ラップジョイントせん断試験によるはんだ接合部の疲労き裂発生寿命評価([J031-02]電子情報機器・半導体デバイス・電子部品の冷却技術(2),材料力学部門)

Abstract

Shear fatigue tests of Sn-3.0Ag-0.5Cu solder joints were carried out by the combination of an advanced lap-joint specimen with high stiffness fixtures. This paper presents an evaluation of fatigue crack initiation lifetime of the joints under the condition of low strain rate followed by creep deformation. Consequently, an experimental relation between the inelastic strain range and the number of cycles corresponding to 20% load decrease were obtained.