| 镀钯铜线性能对键合质量的影响研究 |
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| 引用本文： | 曹军,范俊玲,薛铜龙.镀钯铜线性能对键合质量的影响研究[J].材料科学与工艺,2014,22(5):48-53. |
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| 作者姓名： | 曹军 范俊玲 薛铜龙 |
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| 作者单位： | 1. 河南理工大学 机械与动力工程学院,河南 焦作,454000
2. 焦作大学 化工与环境工程学院,河南 焦作,454003 |
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| 基金项目： | 甘肃省科技攻关项目(2GS064-A52-05). |
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| 摘 要： | 研究了不同性能镀钯铜线对其键合质量的影响,分析了不同钯层厚度、不同延伸率和拉断力、镀钯铜线热影响区长短对铜线键合质量的作用机制.研究结果表明:镀钯铜线钯层厚度过小会造成Electronic-Flame-Off(EFO)过程中的Free Air Ball(FAB)偏球、第一焊点形状不稳定及钯层分布不均匀;延伸率过小和拉断力过大会造成焊点颈部应力集中,并产生微裂纹而造成焊点的拉力和球剪切力偏低;镀钯铜线的高强度和低延伸率降低其再结晶温度,造成长的热影响区和颈部晶粒粗大,降低其力学性能,焊接过程中产生颈部裂纹和塌丝.
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| 关 键 词： | 镀层厚度 延伸率 拉断力 热影响区 键合 |
| 收稿时间： | 5/2/2013 12:00:00 AM |
Investigation of copper coating Pd wire properties and bonding quality |
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| CAO Jun,FAN Junling and XUE Tonglong.Investigation of copper coating Pd wire properties and bonding quality[J].Materials Science and Technology,2014,22(5):48-53. |
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| Authors: | CAO Jun FAN Junling and XUE Tonglong |
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| Affiliation: | School of Mechanical and Power Engineering,HeNan Ploytechnic Universtiy,Jiaozuo 454000,China;Chemical and Environmental Engineering Institute, Jiaozuo University, Jiaozuo 454003, China;School of Mechanical and Power Engineering,HeNan Ploytechnic Universtiy,Jiaozuo 454000,China |
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| Abstract: | The different mechanical properties of Pd coated copper wire were investigated, and the effects of Pd thickness, wire elongation/strength and wire HAZ on the strength of copper wire bonding were discussed. It is found that small Pd thickness can cause the Pd elements to distribute non-uniformly on Free Air Ball after Electronic Flame Off, lead to form a Golf ball, and the ball shape will be astable. Small elongation and high tensile strength may cause micro-crack at the bonding neck, thus resulting in insufficient bonding strength. High tensile strength and small elongation of copper coating Pd wire can decrease the temperature of re-crystal, increase the length of HAZ, and form excessive large grain on the neck, those can cause some crack on the neck and flat wire, then reduce the life of device. |
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| Keywords: | Pd thickness elongation tensile strength HAZ bonding |
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