What is the role of adding silver in the production process of lead-free solder paste?

Now, everyone in the market should be clear that there are two types of solder paste, one containing silver and the other not. So, does the one containing silver have a different impact on the production process? Everyone is well aware that lead-free solder paste is a product that is prone to deterioration, so we should pay close attention to this aspect. Moreover, silver is expensive. Why choose it? Let's take a look at what its functions are with the help of the solder paste manufacturer's editor.

The main function of silver in solder paste is to enhance the wetting performance,Ensure that the welding is more reliable.

The earliest metal components used in solder paste were63/37The welding effect and electrical performance are both very reliable.

But after promoting environmental protection,Lead is banned in many applications, and solder paste manufacturers attempt to use tin-copper alloys instead of tin-lead alloys. The welding effect has always been unsatisfactory.The brightness of the solder joints and the electrical performance of the products vary greatly. Later, solder paste manufacturers added silver metal to the tin-copper alloy,Since silver has the effect of increasing the wetting of solder joints, after long-term experiments, it was finally determinedSAC305The performance of metal content welding is close63/37Tin-lead alloy,It is regarded as a reliable metal welding combination.whileSAC0307The main purpose of its use is to reduce costs, improve the wetting performance andSAC305There is a difference in the content of alloys.

Also, I'd like to tell everyone that the silver in the solder paste should not be too much either, otherwise it will also cause problems with the quality of the soldering, probably3%The silver on the left and right is the best! However, the cost of solder paste containing silver will increase! To master the relevant solder pasteLead-free solder pasteWe warmly welcome all friends to consult Shenzhen JJY Industrial Production High-tech Co., Ltd. for problems related to solder paste and other soldering methods. Let's learn and grow together!