エレクトロ箔導体の疲労信頼性に及ぼす樹脂封止条件の影響 : Cu-Ni箔のマイクロバックリング抑止による低サイクル疲労寿命の改善

概要

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To examine experimentally the effect of the restraining condition on the reliability of foil, strain controlled tension compression fatigue test and microscopic observation were made using metal foil embedded in an epoxy resin. The foil was 10 μm thick, 1 mm, 2 mm, 4 mm, 8 mm, 100 mm long and silicon oil was applied on it to change the restraining condition. As a result, (1) Micro buckling occurred in a foil under repeated load and crack initiated at the area were observed. (2) When silicon oil was applied, the energy spent during foil deformation decreased, and the fatigue life fell off. (3) When a restraining condition changed the fatigue life changed 3 times to 10 times. (4) Because of the temperature dependent characteristics of a resin or an elastomer, it is conceivable that the temperature change of flexible printed circuit exerts a large influence on the fatigue life.
一般社団法人日本機械学会の論文
2001-06-25