Uniaxial ratchetting behavior of anisotropic conductive adhesive film under cyclic tension

Uniaxial ratchetting behavior of anisotropic conductive adhesive film under cyclic tension
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循环拉伸下各向异性导电胶膜的单轴棘轮行为

DOI:
10.1016/j.polymertesting.2010.10.003
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发表时间:
2011-02
期刊:
影响因子:
5.1
通讯作者:
Zhang, Jun
Zhang, Jun
中科院分区:
材料科学2区
文献类型:
--
作者:
Lin, Y. C.;Chen, Xiao-Min;Zhang, Jun

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基于聚合物的导电粘合材料已广泛应用于许多电子封装互连应用中。通过单轴循环拉伸实验研究了各向异性导电胶膜(ACF)的单轴棘轮行为。分析了平均应力、应力幅值和加载历史对ACF材料棘轮响应的影响。结果表明:(1)ACF材料的棘轮应变幅和棘轮应变率随着应力幅或平均应力的增大而增大; (2)ACF材料具有很强的加载历史记忆能力。具有较高平均应力或应力幅值的先前应力循环抑制了具有较低平均应力或应力幅值的后续循环中的棘轮应变。对于 ACF 材料,先前具有较高应力率的应力循环将加速后续具有较低应力率的循环的塑性变形。
Polymer-based conductive adhesive materials have become widely used in many electronic packaging interconnect applications. Uniaxial ratchetting behavior of anisotropic conductive adhesive film (ACF) was studied by uniaxial cyclic tension experiments. The effects of mean stress, stress amplitude and loading history on the ratchetting response of ACF material were analyzed. Results show that (1) the ratchetting strain amplitude and ratchetting strain rate of the ACF material increase with increasing stress amplitude or mean stress; (2) the ACF material has a strong memory of loading history. Prior stress cycling with higher mean stress or stress amplitude restrains the ratchetting strain in subsequent cycling with lower mean stress or stress amplitude. Prior stress cycling with higher stress rate will accelerate the plastic deformation of subsequent cycling with lower stress rate for the ACF material.
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