| 热循环加载条件下PBGA叠层无铅焊点可靠性分析 |
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| 引用本文： | 韦何耕,黄春跃,梁颖,李天明,吴松,郭广阔.热循环加载条件下PBGA叠层无铅焊点可靠性分析[J].焊接学报,2013(10):91-94. |
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| 作者姓名： | 韦何耕 黄春跃 梁颖 李天明 吴松 郭广阔 |
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| 作者单位： | 桂林电子科技大学机电工程学院, 桂林 541004,桂林电子科技大学机电工程学院, 桂林 541004,成都航空职业技术学院电子工程系, 成都 610021,桂林航天工业学院汽车与动力工程系, 桂林 541004,桂林电子科技大学机电工程学院, 桂林 541004,桂林电子科技大学机电工程学院, 桂林 541004 |
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| 基金项目： | 广西壮族自治区自然科学基金资助项目(2012GXNSFAA-053234,2013GXNSFAA019322);四川省教育厅科研资助项目(13ZB0052) |
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| 摘 要： | 建立了塑料球栅阵列(plastic ball grid array,PBGA)器件叠层焊点应力应变有限元分析模型,基于该模型对叠层无铅焊点在热循环载荷条件下的应力应变分布进行了分析,计算其热疲劳寿命,分析焊点材料、焊点高度和焊点最大径向尺寸对叠层焊点热疲劳寿命的影响.结果表明,与单层焊点相比,焊点叠加方式能有效提高焊点热疲劳寿命;采用有铅焊料Sn62Pb36Ag2和Sn63Pb37的叠层焊点比采用无铅焊料Sn-3.5Ag和SAC305的叠层焊点热疲劳寿命高;叠层焊点的高度由0.50 mm增加到0.80 mm时,焊点的热疲劳寿命随其高度的增加而增加;叠层焊点的最大径向尺寸由0.30 mm增加到0.45 mm时,焊点的热疲劳寿命随焊点的最大径向尺寸增加而减小.
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| 关 键 词： | 叠层焊点 无铅焊料 热疲劳寿命 有限元分析 |
| 收稿时间： | 2012/7/20 0:00:00 |
Reliability analysis of plastic ball grid array double-bump lead-free solder joint under thermal cycle |
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| WEI Hegeng,HUANG Chunyue,LIANG Ying,LI Tianming,WU Song and GUO Guangkuo.Reliability analysis of plastic ball grid array double-bump lead-free solder joint under thermal cycle[J].Transactions of The China Welding Institution,2013(10):91-94. |
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| Authors: | WEI Hegeng HUANG Chunyue LIANG Ying LI Tianming WU Song and GUO Guangkuo |
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| Affiliation: | School of Electro-Mechanical Engineering, Guilin University of Electronic Technology, Guilin 541004, China,School of Electro-Mechanical Engineering, Guilin University of Electronic Technology, Guilin 541004, China,Department of Electronic Engineering, Chengdu Aeronautic Vocational and Technical College, Chengdu 610021, China,Department of Automobile and Power Engineering, Guilin University of Aerospace Technology, Guilin 541004, China,School of Electro-Mechanical Engineering, Guilin University of Electronic Technology, Guilin 541004, China and School of Electro-Mechanical Engineering, Guilin University of Electronic Technology, Guilin 541004, China |
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| Abstract: | The automatic seam tracking of overlap seams of sheet was always a particular problem in the welding field.According to the characteristics of its welding procedure,a seam tracking method for overlap sheet welding based on magneticcontrol arc sensing is proposed in this paper.By employing external alternating transverse magnetic field to control arc motion, this method acquires the real-time welding deviation through detecting the variation rules of welding currents.Wavelet threshold de-noising method is selected to process the current signals after contrastive analysis on the filtering results of the two-level second- order Butterworth filter and the wavelet filtering.Based on the analysis of characteristics of overlap sheet welding and the motion of magnetic-control arc,a control method of welding deviation correction based on the combination of unilateral-compared midpoint-divided area integral method and the torch-control method is proposed.The results of practical seam tracking experiments demonstrate that the automatic seam tracking method proposed can effectively resolve the dilemma of real-time seam tracking during overlap sheet welding. |
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| Keywords: | double-bump solder joint lead-free solder thermal fatigue life finite element |
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