中国电子学会电子制造与封装技术分会会刊

中国半导体行业协会封测分会会刊

无锡市集成电路学会会刊

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电子与封装 ›› 2026, Vol. 26 ›› Issue (4): 040202 . doi: 10.16257/j.cnki.1681-1070.2026.0036

• 封装、组装与测试 • 上一篇    下一篇

热循环载荷下BTC器件焊点应力分析与优化

吴松,张可,梁威威,谢颖   

  1. 四川九洲电器集团有限责任公司
  • 收稿日期:2025-08-12 出版日期:2026-04-28 发布日期:2025-10-11
  • 作者简介:吴松(1988—),男,四川西昌人,硕士,高级工程师,主要研究方向为微电子封装与组装可靠性技术。

Stress Analysis and Optimization of Solder Joints of BTC Devices Under Thermal Cyclic Loading

WU Song, ZHANG Ke, LIANG Weiwei, XIE Ying   

  1. Sichuan Jiuzhou Electric Group Co., Ltd.,Mianyang 621000, China
  • Received:2025-08-12 Online:2026-04-28 Published:2025-10-11

摘要: 针对底部端子元器件(BTC)设计2种不同尺寸和布局的PCB焊盘,并建立对应2种BTC器件焊点的有限元分析模型,通过有限元仿真和金相试验,分析热循环载荷下焊盘设计方案和焊点结构参数对BTC器件焊点应力的影响。采用正交试验设计法设计9组焊点长度、宽度、高度参数组合的BTC器件焊点方案,研究结果表明,基于焊盘类型Ⅱ的BTC器件焊点最大应力更低,该焊盘设计方案更优;焊点高度对焊点最大应力影响显著,焊点长度和宽度影响不显著,最终实现BTC器件焊点结构优化。

关键词: BTC器件焊点, 有限元仿真, 金相试验, 焊盘设计, 正交试验设计法

Abstract: Two PCB pads with different sizes and layouts are designed for bottom termination components (BTCs), and corresponding finite element models of BTC solder joints are established. Through finite element simulations and metallographic tests, the influences of pad design schemes and solder joint structural parameters on the stress of BTC solder joints under thermal cyclic loading are investigated. An orthogonal experimental design method is employed to formulate nine groups of BTC solder joint schemes with different combinations of solder joint length, width, and height parameters. The results demonstrate that the maximum stress of BTC solder joints based on pad type II is lower, indicating that this pad design is superior. Solder joint height exhibits a significant effect on the maximum stress of solder joints, whereas the effects of solder joint length and width are insignificant. Consequently, the structural optimization of BTC solder joints is ultimately achieved.

Key words: BTC solder joint, finite element simulation, metallographic test, pad design, orthogonal experimental design method

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