| 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.DOI:10.11951/j.issn.1005-0299.20140509. |
| CAO Jun,FAN Junling,XUE Tonglong.Investigation of copper coating Pd wire properties and bonding quality[J].Materials Science and Technology,2014,22(5):48-53.DOI:10.11951/j.issn.1005-0299.20140509. |
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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. |
| 关键词: 镀层厚度 延伸率 拉断力 热影响区 键合 |
| DOI：10.11951/j.issn.1005-0299.20140509 |
| 分类号:TG249.7 |
| 基金项目:甘肃省科技攻关项目(2GS064-A52-05). |
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| Investigation of copper coating Pd wire properties and bonding quality |
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CAO Jun1, FAN Junling2, XUE Tonglong1
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(1.School of Mechanical and Power Engineering,HeNan Ploytechnic Universtiy,Jiaozuo 454000,China; 2.Chemical and Environmental Engineering Institute, Jiaozuo University, Jiaozuo 454003, 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. |
| Key words: Pd thickness elongation tensile strength HAZ bonding |
