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Experiment study of dynamic looping process for thermosonic wire bonding

机译：热超声引线键合动态成环工艺的实验研究

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摘要

Looping is a complex dynamic process affected by many interacted factors, and is becoming more and more important in the state-of-the-art thermosonic wire bonding. To provide an insight view of loop mechanism, the looping process of standard loop was experimentally studied with a high resolution and high speed video camera. The capillary trace and loop profile evolution process were obtained from looping video with a digital image process program. A phenomenological description was used to understand the looping forming mechanism. The effect of capillary trace on loop profile was investigated, and the kinks forming mechanism were discussed. The spring back and kink up were detaily described. Experiment results show that loop profile was affected by kinks number, position on gold wire and deformation. Kinks were formed by reverse motion of capillary. From the geometry point of view, kink is the wire segment with the local maximum curvature. From the mechanical point of view, kink is the partly plastic deformed wire segment with elastic deformed core inside. This study may be useful for loop design in industry and for loop dynamic research in academic.
机译：循环是受许多相互作用因素影响的复杂动态过程，并且在最新的热超声引线键合中变得越来越重要。为了提供对循环机制的深入了解，对高分辨率和高速摄像机进行了标准循环的循环过程进行了实验研究。通过使用数字图像处理程序对视频进行循环，可以获得毛细管跟踪和循环轮廓演变过程。现象学的描述被用来理解环形成的机理。研究了毛细管痕迹对毛圈轮廓的影响，并探讨了扭结形成机理。详细描述了回弹和扭结。实验结果表明，线圈的外形受扭结数，金线位置和变形的影响。扭结是通过毛细管的反向运动形成的。从几何角度来看，扭结是具有局部最大曲率的线段。从机械角度来看，扭结是部分塑性变形的线段，内部具有弹性变形的芯。该研究对于工业中的回路设计和学术界中的回路动态研究可能是有用的。

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  • 来源
    《Microelectronics reliability》 |2012年第6期|p.1105-1111|共7页
  • 作者

    Fuliang Wang; Yun Chen; Lei Han;

  • 作者单位

    State Key Laboratory of High Performance Complex Manufacturing, Changsha 410083. China School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China;

    State Key Laboratory of High Performance Complex Manufacturing, Changsha 410083. China School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China;

    State Key Laboratory of High Performance Complex Manufacturing, Changsha 410083. China School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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