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of the contact angle is obtained from the solder with 0.1% Nd addition. Key words: lead-free solder; zinc; neodymium; lanthanum; surface tension; wettability CLC number: TN604 Document code... recently been considered a candidate for lead-free solder material because of its low melting point (198℃), excellent mechanical properties and low cost. However, since Zn-contained alloys have......
solder alloys have been carried out, due to environmental problems and health concerns about products that contain lead. Sn-Ag-Cu alloys are expected to be one of the most reliable lead-free solders[1-3... on Cu substrates. Consequently, the Cu6Sn5 IMC is reduced in thickness. It is reasonable to believe that a similar effect may occur when Ce element is added to a Sn-3.0Ag-0.5Cu lead-free solder system......
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, SHIH D Y, LEE T Y. Spalling of intermetallic compounds during the reaction between lead-free solders and electroless Ni-P metallization [J]. J Mater Res, 2004, 19(8): 2428-2436. [20] ZENG K, TU K N. Six cases of reliability study of Pb-free solder joints in electronic packaging technology [J]. Mater Sci Eng R, 2002, 38(2): 55-105. [21] KIM S W, YOON J W, JUNG S B. Interfacial reactions......
, Sb等低熔点金属和微量Ce, La等稀土元素以降低贵金属In和Ag的含量, 进一步提高无铅锡基多元合金钎料的综合性能和性能价格比. 关键词: 钎料合金; 无铅钎料; 相图; 相图计算 中图分类号: TG113.14 文献标识码: A Design of lead-free solder alloy and alloy phase diagram calculation QIAO... of Materials and Metallurgical Engineering, Kunming University of Science and Technology, Kunming 650093, China) Abstract: The principles for lead-free solder alloy design and the importance of phase......
of eutectic, Sn-Zn alloy as a lead-free solder has been discussed. The nonequilibrium melting behaviors of a series of Sn-Zn alloys were examined by differential thermal analysis. It was found...%. The total thickness of the reaction layer(s) between the alloy and Cu was found to increase linearly with the Zn concentration. Key words:lead-free solder; Sn-Zn alloy; wettability; interface......
: A Wetting match performance of SnAgCuRE lead-free solder for surface mount component ZHANG Ke-ke, WANG Shuang-qi, YU Yang-chun, WANG Yao-li,FAN Yan-li, CHENG Guang-hui, HAN Li-juan (College of Materials Science and Engineering, Henan University of Science and Technology,Luoyang 471003, China) Abstract: The wetting match performances of SnAgCuRE lead-free solder for surface mount component......
.%) to form Sn-9Zn-xAg lead-free solder alloys. The effect of the addition of Ag on the microstructure and solderability of this alloy was investigated and intermetallic compounds (IMCs) formed...Solderability and intermetallic compounds formation of Sn-9Zn-xAg lead-free solders wetted on Cu substrateCHEN Wenxue, XUE Songbai, WANG Hui, WANG Jianxin, and HAN Zongjie College of Materials......
界面耦合作用对Cu(Ni)/Sn-Ag-Cu/Cu(Ni)BGA焊点界面IMC形成与演化的影响李勋平1,周敏波1,夏建民1,马骁1,张新平1(1.广东省广州市华南理工大学材料科学与工程学院)摘 要:研究了焊盘材料界面耦合作用对Cu(Ni)/Sn-3.0Ag-0.5Cu/Cu(Ni)BGA(Ball Grid Array)结构焊点焊后态和125℃等温时效过程中界面金属间化合物(IMC)的成分,形貌和生长动力学的影响.结果表明.凸点下金属层(UBM)Ni界面IMC的成分与钎料中Cu含量有关,钎料中Cu含量较高时界面......