Which is better, lead-free solder paste or leaded solder paste? How should users make their choices?

Lead-free solder pasteWhich is better, leaded solder paste or leaded solder paste? How should everyone choose? Today, I will give you a detailed explanation of the advantages and disadvantages of lead-free and leaded products, as well as the differences between them. Now, let's have the editor of JJY Solder Paste Factory explain in detail to you the advantages and features of it.

Generally speaking, the type of solder paste to be used is determined by the process requirements. However, lead-free solder paste is more environmentally friendly. Different solder pastes have different functions, and the most suitable one is the best. 

The ingredients of lead-free solder paste are:Sn,Ag,Cu,B iThe main components of lead-based solder paste are:Sn,PB, This alloy cannot be directly identified by the naked eye. It needs to be detected through a spectral analysis instrument.

Lead-free solder paste is generally divided into: high-temperature lead-free solder paste (alloy composition:Sn/Ag/CuMedium-temperature lead-free solder pasteSn/Ag/BiLow-temperature lead-free solder pasteSn/BiThe distinction of alloy composition requires professional detection instruments for analysis and cannot be seen with the naked eye. 

Leaded solder paste and lead-free solder paste have different colors. Leaded solder paste is grayish black when opened, while lead-free solder paste is grayish white. 

The finished paste of lead-free solder paste is slightly gray in color, while the finished paste of leaded solder paste is slightly black in color. 

Compared with leaded solder paste, lead-free solder paste has stronger activity. Then, how to choose between lead-free and leaded solder paste depends on the specific needs of the client. Based on the references provided by the manufacturer and combined with one's own experiments, adjusting the process window properly can achieve very good results.