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环氧树脂与铜在附着接口上的电子相互作用

Shintaro Saeki¹, Daisuke Kawaguchi², Yuta Tsuji³

¹Department of Applied Chemistry, Kyushu University, Fukuoka 819-0395, Japan.

Langmuir : the ACS journal of surfaces and colloids

|April 23, 2024

概括

这项研究使用DFT计算和TAS测量揭示了环氧粘合剂和铜之间的电子相互作用. 这些发现提高了对电子包装粘附机制的理解.

科学领域:

材料科学材料科学材料科学
表面化学表面化学
物理化学物理化学

背景情况:

了解粘合剂粘合的界面相互作用是控制粘合强度的关键.
现有的粘附理论包括吸附,机械,扩散和电子机制.
电子粘附理论在实验上仍未得到充分探索.

研究的目的:

直接检测和描述特定环氧粘合剂和铜之间的电子相互作用.
用先进的计算和光谱方法验证电子粘附理论.
评估秒暂时吸收光谱 (TAS) 的适用性,用于表征金属粘合界面.

主要方法:

运用密度函数理论 (DFT) 计算来建模电子相互作用.
在铜/环氧多层薄膜上使用了秒暂时吸收光谱 (TAS) 测量.
结合计算预测与实验光谱数据进行验证.

主要成果:

DFT计算预测了从被吸附的4,4'-二氨基二甲 (DDM) 分子到铜表面的电子流,从而诱导了DDM的正电荷.
与散装环氧相比,TAS测量显示在铜接口上激发的DDM部分的电子状态不同.
实验TAS结果强烈证实了DFT的预测,证实了接口上的电子相互作用.

结论:

确立了双A (DGEBA) 环氧 (含有DDM) 和铜的固化二甲乙醇乙烯之间电子相互作用的直接证据.
五秒短暂吸收光谱 (TAS) 是一种可行的非破坏性技术,用于表征金属粘接口上的电子相互作用.
这项研究有助于更深入地了解粘附机制,特别是电子理论,与电子设备包装相关.

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