Clarification of Coalescence Mechanism of Metal Fillers in Self-Organization Assembly Process

在这项研究中，我们研究了在新提出的自组织组装过程中，熔融的填充金属在树脂中流动、聚集和结合的基本原理。特别是，我们发现，由于表面氧化膜的退化而引起的表面能变化是熔化的填充金属流动的驱动力。研究还发现，填充金属表面氧化膜的降解和树脂粘度的变化是影响自组织组装过程组装性能的主要因素。此外，还给出了IC芯片上数千个电极端子连接的材料设计或工艺设计指南。

In this study, we investigated the fundamental principles of the flow, cohesion, and coalescence of the molten filler metals in the resin in the newly proposed self-organization assembly process. In particular, we found that the surface energy change due to degradation of the surface oxide film is the driving force of the molten filler metal flow. We also found that degradation of oxide film on the filler metals and viscosity change of the resin are major influence for the assembly property of the self-organization assembly process. In addition, guidelines of material design or process design for terminal connection on the thousands of electrodes on IC chip has been given.