In order to understand the influence of the Kovar-4J29 cylinder height on ultrasonic wire bonding, it was studied by the finite-element method (FEM). Explicit Dynamics was used to simulate the bonding process. And the modal frequencies and response deformations of the cylinder with different heights were also carried out. The results showed that the lower interfacial activation energy due to resonance resulted in a successful bonding between the gold ball and the Kovar-4J29 cylinder. Furthermore, a generalized pattern search (GPS) algorithm was utilized to optimize the height of the cylinder to obtain a better bonding effect, followed by re-simulation of the optimized model. This study could provide guidance for further bonding experiments between gold balls and Kovar-4J29 cylinder.

中文翻译：

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Kovar-4J29圆柱共振对超声波引线键合的影响

为了了解Kovar-4J29圆柱体高度对超声波引线键合的影响，通过有限元方法（FEM）对其进行了研究。显式动力学用于模拟粘合过程。并进行了不同高度圆柱体的模态频率和响应变形分析。结果表明，由于共振而产生的较低的界面活化能导致金球与Kovar-4J29圆柱体之间成功粘合。此外，利用广义模式搜索（GPS）算法来优化圆柱体的高度以获得更好的粘合效果，然后对优化后的模型进行重新仿真。该研究可为金球与Kovar-4J29圆柱体之间的进一步粘合实验提供指导。