Effect of Epoxy Material Viscosity and Gold Wire Configuration on Light-Emitting Diode Encapsulation Process

IF 2.2 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Journal of Electronic Materials Pub Date : 2024-09-17 DOI:10.1007/s11664-024-11432-y

C. Y. Khor, Mohd Sharizal Abdul Aziz, Chooi Jing Qi, Xing Qi Lim, M. H. H. Ishak, Mohd Arif Anuar Mohd Salleh

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Abstract

This paper investigates the impacts of epoxy material viscosity and different gold wire configurations on the total maximum deformation, maximum von Mises stress, and maximum equivalent elastic strain on the light-emitting diode (LED) encapsulation process. The simulation of the LED encapsulation process employed the Volume of Fluid (VOF), Fluid–Structure Interaction (FSI), and System Coupling methods within ANSYS software. The simulation results for an epoxy molding compound (EMC) with viscosity of 0.448 kg/m·s were validated by an experiment. A grid independence test was run to determine the minimum mesh refinement required for the simulation. The results revealed that the final fluid profile of the EMC at 0.448 kg/m·s conformed more closely to the experimental results than the other epoxies. The overall best performance of the wire configuration to the EMC on the LED encapsulation process, in descending order, was the square-loop, triangle-loop, S-loop, Q-loop, and M-loop. This study contributes to understanding the effects of epoxy materials and various gold wire configurations on key mechanical parameters in the LED encapsulation process, hence guiding LED manufacturers in selecting optimal epoxy materials and wire configurations to improve process reliability and performance.

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环氧树脂材料粘度和金线配置对发光二极管封装工艺的影响

本文研究了环氧树脂材料粘度和不同金线配置对发光二极管（LED）封装过程中总最大变形、最大 von Mises 应力和最大等效弹性应变的影响。LED 封装过程的模拟采用了 ANSYS 软件中的流体体积 (VOF)、流体-结构相互作用 (FSI) 和系统耦合方法。实验验证了粘度为 0.448 kg/m-s 的环氧模塑化合物 (EMC) 的模拟结果。进行了网格独立性测试，以确定模拟所需的最小网格细化度。结果表明，与其他环氧树脂相比，粘度为 0.448 kg/m-s 的 EMC 的最终流体剖面更接近实验结果。在 LED 封装过程中，导线配置对 EMC 的整体最佳性能依次为方形环路、三角形环路、S 形环路、Q 形环路和 M 形环路。这项研究有助于了解环氧树脂材料和各种金线配置对 LED 封装工艺中关键机械参数的影响，从而指导 LED 制造商选择最佳环氧树脂材料和金线配置，以提高工艺可靠性和性能。

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来源期刊

Journal of Electronic Materials 工程技术-材料科学：综合

CiteScore

4.10

自引率

4.80%

发文量

693

审稿时长

3.8 months

期刊介绍： The Journal of Electronic Materials (JEM) reports monthly on the science and technology of electronic materials, while examining new applications for semiconductors, magnetic alloys, dielectrics, nanoscale materials, and photonic materials. The journal welcomes articles on methods for preparing and evaluating the chemical, physical, electronic, and optical properties of these materials. Specific areas of interest are materials for state-of-the-art transistors, nanotechnology, electronic packaging, detectors, emitters, metallization, superconductivity, and energy applications. Review papers on current topics enable individuals in the field of electronics to keep abreast of activities in areas peripheral to their own. JEM also selects papers from conferences such as the Electronic Materials Conference, the U.S. Workshop on the Physics and Chemistry of II-VI Materials, and the International Conference on Thermoelectrics. It benefits both specialists and non-specialists in the electronic materials field. A journal of The Minerals, Metals & Materials Society.