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无铅锡条Lead Free Solder Bar SN100C
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详细描述
成分资料
SN100C一览
* 不含银或铋。
* 共晶合金。
* 焊接无桥连,无锡尖 。
* 无论何种冷却速率下,焊点光滑、亮泽、规整,无微裂纹。
* 通孔焊透性良好。
* 在通孔焊接中可形成良好的正面焊点。
* 浮渣率等于或低于锡-铅焊料。
* 无需氮气。
* 不会腐蚀各种焊孔、焊盘和焊接线路上的铜。
* 铜浸出速率低,因而容易控制锡槽中的铜含量。
* 对不锈钢和其他锡炉材料的侵蚀性比锡-银-铜合金低。
* 抗热疲劳性能和蠕变强度优于锡-铅。
* 焊料/基材界面上金属间层的生长缓慢、均匀。
* 在选择性焊接和浸焊中亦有良好表现。
成本底线
客户多年的经验表明,若综合考虑所有因素,在标准波峰焊接机上使用SN100C的总成本仅相当于在同一焊接机上使用锡-银-铜合金成本的1/3。不同情况下实际节支取决于所涉因素的多少,但使用了SN100C的生产线的成本始终低于在同一工作线中使用锡-银-铜合金的成本。
SN100C焊料表面比较
![]() Sn63/Pb37 SN100C Sn99.3/Cu0.7 Sn/Ag3.8/Cu0.1 Sn/Ag3/Cu0.5 (SAC305)
振动测试
用JCAA/JG-PP进行的测试证明,当与NiPbAu或纯锡的元器件表面结合进行振动测试时,SN100C优于SAC合金和锡铅。
合金相容性
测试表明,将SN100C与锡-银-铜或其他无铅合金混合时,未发生退化现象。因此,用SN100C进行波峰焊和用SAC305进行SMT是可接受的,不会影响其可靠性。此外,用SN100C锡丝搭上SAC305焊点时,未发现可靠性下降,反之亦然。
SN100C规格
热循环之前和之后的合金适应性测试数据
结果显示,用SAC、SN100C和SN100C+SAC混合焊料得到的焊点均与在同一块板上得到的锡-铅焊点相当。此外,据测定热循环应不会令这些焊点产生退化。 用SN100C进行波峰焊的推荐参数
成功通过尝试与测试 1999年以来,全球主要电子制造商都通过SN100C获得了出色的结果。迄今为止,各类产品中,已有数百万电路板使用SN100C列焊料组装而成。众多使用SN100C焊接的器件已经应用多年。 SN100C is a lead-free solder alloy developed by Nihon Superior in Japan comprised of tin, copper,and a small amount of nickel + germanium. SN100C offers user friendly properties and has Sn-37Pb been proven in commercial production for over six years.The result of these advantages is that SN100C offers high-throughput and the lowest cost of ownership as compared to any other lead-free solder alloy. SN100C At A Glance
* Does not contain silver or bismuth. * Eutectic alloy. * Bridge-free and icicle-free soldering. * Smooth, bright, well-formed fillets, free of gross micro-cracks, irrespective of the cooling rate. * Good through-hole penetration. * Good topside fillet formation. * Dross rate equal or lower than tin-lead solder. * Does not require a nitrogen atmosphere. * Does not erode copper from holes, pads and tracks. * Low rate of copper leaching makes it easy to control the copper content of the solder bath. * Lower aggressiveness to stainless steel and other solder pot materials as compared to tin-silver-copper alloys. * Thermal fatigue resistance and creep strength better than tin-lead. * Slow, even growth of the intermetallic layer at the solder/substrate interface. * Also performs well in selective and dip soldering. The Bottom Line SN100C Solder Surface Comparison
Rapid Cooling Slow Cooling Sn63/Pb37 SN100C Sn99.3/Cu0.7 Sn/Ag3.8/Cu0.1 Sn/Ag3/Cu0.5 (SAC305) Vibration Testing Alloy Compatibility Availability 用户评论
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