• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2022, Vol. 58 ›› Issue (2): 43-49.doi: 10.3901/JME.2022.02.043

• 微纳连接新材料 • 上一篇    下一篇

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Cu5Zn8和Sn/Ag3Sn/Ag扩散阻挡层在Sn/Cu钎焊互连界面反应中的作用

姚金冶1, 陈祥序1, 李花2, 马海涛1, 王云鹏1, 马浩然3   

  1. 1. 大连理工大学材料科学与工程学院 大连 116024;
    2. 航天工程大学宇航科学与技术系 北京 101416;
    3. 大连理工大学微电子学院 大连 116024
  • 收稿日期:2021-05-19 修回日期:2021-10-28 出版日期:2022-01-20 发布日期:2022-03-19
  • 通讯作者: 马海涛(通信作者),男,1971年出生,博士,教授,博士研究生导师。主要研究方向为电子封装无铅钎焊界面反应机制及界面可靠性。E-mail:htma@dlut.edu.cn
  • 作者简介:姚金冶,男,1995年出生,博士研究生。主要研究方向为电子封装界面扩散阻挡层消耗行为及界面反应机理。E-mail:yaojinye@mail.dlut.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(51871040)。

Effect of Cu5Zn8 and Sn/Ag3Sn/Ag Diffusion Barrier on Interface Reaction of Sn/Cu Soldering

YAO Jinye1, CHEN Xiangxu1, LI Hua2, MA Haitao1, WANG Yunpeng1, MA Haoran3   

  1. 1. School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024;
    2. Department of Aerospace Science and Technology, University of Aerospace Engineering, Beijing 101416;
    3. School of Microelectronics, Dalian University of Technology, Dalian 116024
  • Received:2021-05-19 Revised:2021-10-28 Online:2022-01-20 Published:2022-03-19

摘要: 电子器件的微型化对钎焊界面的可靠性提出更高的要求,深入研究钎焊界面金属间化合物(Intermetallic compound,IMC)的形貌演变和生长机制具有重要意义。金属Cu具有优良的导电导热性能,在微电子封装行业中广泛应用为基体材料。在钎焊回流过程中,Cu基体与Sn钎料发生界面反应生成IMC,由于IMC具有较高脆性,过度生长的IMC会严重降低焊接接头的可靠性。为了抑制IMC的过度生长,在Cu基体表面分别制备Cu5Zn8扩散阻挡层和Sn/Ag3Sn/Ag扩散阻挡层。研究在不同钎焊工艺下,纯Sn钎料在Cu基板、Cu5Zn8扩散阻挡层/Cu基板、Sn/Ag3Sn/Ag扩散阻挡层/Cu基板上IMC的形貌演变及生长动力学机制,最终试验结果发现Cu5Zn8,Sn/Ag3Sn/Ag扩散阻挡层可以抑制Sn/Cu钎焊互连界面反应。

关键词: 扩散阻挡层, 钎焊, 纯Sn钎料, Cu5Zn8, Ag3Sn

Abstract: The miniaturization of electronic devices is seriously strict with the reliability of soldering interfaces. Therefore, it is of great significance to study the morphology evolution and growth mechanism of intermetallic compounds (IMC) at the soldering interface. Cu has excellent electrical and thermal conductivity that used as matrix material in the microelectronic packaging industry. During the soldering process, intermetallic compound(IMC) formed by interfacial reaction between Cu and Sn solder. Due to the high brittleness of IMC, the excessive growth of IMC will seriously reduce the reliability of welded joints. To overcome the excessive growth of IMC, Cu5Zn8diffusion barrier layer and Sn/Ag3Sn/Ag diffusion barrier laye are prepared on Cu substrate. The morphology evolution and growth mechanism of IMC on Cu, Cu5Zn8diffusion barrier layer/Cu and Sn/Ag3Sn/Ag diffusion barrier layer/Cu under different soldering process are studied. The results show that Cu5Zn8diffusion barrier layer, Sn/Ag3Sn/Ag diffusion barrier layer can inhibit interface reaction of Sn/Cu soldering.

Key words: diffusion barrier, soldering, pure Sn solder, Cu5Zn8, Ag3Sn

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