What are the differences between leaded solder paste and lead-free solder paste in PCBA processing

SMTProcessing holds an important position in the electronics manufacturing industry, and it is achieved throughSMTSurface mount technology and other processes will transform the original printed circuit boardPCBIt is transformed into finished electronic products. inSMTDuring processing, leaded and lead-free welding techniques are two types of welding processes, which have different impacts on product performance and reliability. Next, Shenzhen JJYSolder paste manufacturerLet's explain itPCBAThe difference between leaded and lead-free in processing:

Leaded solder paste is mainly made of metals containing tin and lead. The common lead component isSn63Pb37The melting point is183℃. Its weld points are shiny, the cost is relatively low, and the welding quality is stable. However, lead-containing solder paste has problems such as environmental pollution and unsafe production operations. Therefore, many countries have banned the use of lead-containing materials in production and manufacturing.

In contrast, lead-free solder paste is a process developed from leaded solder paste, and its main components areSAC305(Sn:96.5%,Ag:3%,Cu:0.5%The melting point is217℃.Lead-free solder paste is more environmentally friendly, healthy, safe and reliable because it does not contain lead, thus avoiding the pollution of lead to the human body and the environment. However, the lead-free process has darker solder joints, higher costs, and the mechanical strength of the solder joints is not as good as that of the leaded process.

At present, lead-free solder paste solutions have becomeSMTThe mainstream of processing. This is because the new international standards (such asRoHSThe directive prohibits the use of lead-containing electronic products. Meanwhile, the advantages of lead-free solder paste have been widely recognized and promoted. However, lead-free solder paste technology has certain limitations. For example, high welding temperatures may damage special materials; In addition, there is leadPCBCompared with components, lead-free solder paste has poorer mechanical strength and is prone to breakage and cracking, which affects the reliability of the product.

Overall, both leaded and lead-free soldering processes have their own advantages and disadvantages. With the improvement and popularization of lead-free solder paste technology, we expect it to gradually replace leaded solder paste and become the mainstream in the industry. In the future, the electronic manufacturing field will rely more on this environmentally friendly and healthy soldering technology.

JJY Solder Paste Manufacturer mainly engages in lead-free solder paste.SMTSurface mount solder pasteLEDWe are engaged in the research and development, production and supply of solder pastes, lead-free solder wires, rosin solder wires, wave soldering rods, red glue and other solder materials. For more knowledge about electronic soldering, you can follow and contact us. Welcome to interact with us.