Affiliation:
1. e-mail:
2. State Key Laboratory of High Performance
Complex Manufacturing, Changsha 410083, China;
3. School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China
Abstract
Kinks have a strong influence on the structural performance of wire bonds. In this study, a variable-length link-spring model has been developed to better understand kink formation. In this model, a gold wire was decomposed into segments that were represented by a link and a torsional spring. One end of the gold wire was fixed, and the other end was free. The friction and air tension forces at the wire ends were considered a function of the capillary position, and the wire segments and moment balance equations were added at the free end as the wire length increased. By using this model, the wire profile, moment, and curvature diagrams at the reverse motion stage were obtained to study the dynamical kink formation and wire-length increasing processes. The analysis result was verified experimentally. Good agreement is obtained between the analytical and the experimental wire profiles. This study indicates that a moment magnitude of several hundred mN·μm is required to form a kink, and the wire profile is the result of the residual curvature and the instantaneous bending moment.
Subject
Electrical and Electronic Engineering,Computer Science Applications,Mechanics of Materials,Electronic, Optical and Magnetic Materials
Reference22 articles.
1. A Method to Determine the Sweep Resistance of Wire Bonds for Microelectronic Packaging;Microelectron. Eng.,2008
2. Shu, B., 1992, “Wire Bond Development for High-Pincount Surface-Mount,” Proceedings 42nd Electronic Components and Technology Conference ('92 ECTC), San Diego, May 18–20, pp. 890–898.10.1109/ECTC.1992.204312
3. Wire Bond Loop Profile Development for Fine Pitch-Long Wire Assembly;IEEE Trans. Semicond. Manuf.,1994
4. Development of New Ultra-High Stiffness Gold Bonding Wire,1999
5. Looping Behaviour of Gold Ballbonding Wire;EPTC 2004,2004
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献