中国半导体行业协会封装分会会刊

中国电子学会电子制造与封装技术分会会刊

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电子与封装 ›› 2025, Vol. 25 ›› Issue (9): 090206 . doi: 10.16257/j.cnki.1681-1070.2025.0096

• 封装、组装与测试 • 上一篇    下一篇

不同台阶对可润湿性侧翼QFN爬锡高度的影响

赵伶俐,杨宏珂,赵佳磊,付宇,周少明   

  1. 郑州兴航科技有限公司,郑州  451150
  • 收稿日期:2025-01-09 出版日期:2025-09-28 发布日期:2025-02-28
  • 作者简介:赵伶俐(1996—),女,河南商丘人,硕士,主要研究方向为电子封装与测试、封装工艺的研发与仿真。

Effect of Different Steps on the Height of Wettable Flank QFN Solder Climbing

ZHAO Lingli, YANG Hongke, ZHAO Jialei, FU Yu, ZHOU Shaoming   

  1. Zhengzhou Xinghang TechnologyCo., Ltd., Zhengzhou 451150, China
  • Received:2025-01-09 Online:2025-09-28 Published:2025-02-28

摘要: 近年来,方形扁平无引脚(QFN)封装凭借优异的电学与热学性能,在市场上占据越来越多的份额。作为QFN的衍生产品,可润湿性侧翼(WF)QFN因其优异的可润湿性在汽车电子领域展现出巨大的发展潜力。采用模拟爬锡的方法,探究不同的一步切割深度与台阶宽度对QFN器件爬锡高度的影响,可以近似模拟器件焊接在PCB上的爬锡效果。结果表明,当台阶切割深度≥0.05 mm或台阶宽度≥0.02 mm时,WF QFN器件的润湿性明显增加,爬锡高度显著提升,可有效改善后期焊接的可靠性。

关键词: 可润湿性, 侧翼QFN, 切割深度, 台阶宽度, 爬锡高度

Abstract: In recent years, quad flat no-lead (QFN) packages have gained an increasingly significant market share owing to their superior electrical and thermal performance. As a derivative of QFN, the wettable flank (WF) QFN has demonstrated significant potential in automotive electronics field due to its exceptional wettability. A solder climbing simulation method is used to investigate the influence of different single-step cutting depths and step widths on the solder climbing height of QFN devices, enabling an approximate simulation of the solder climbing when the devices are soldered on PCB. The results indicate that when the step cutting depth is ≥ 0.05 mm or the step width is ≥ 0.02 mm, the wettability of the WF QFN device is significantly enhanced, leading to a notable increase in solder climbing height. This improvement effectively enhances the reliability of subsequent soldering processes.

Key words: wettable, flank QFN, cut depth, step width, solder climbing height

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