What types of solder paste are there in smt assembly?

insmtDuring the surface mount technology (SMT) processingSolder pasteIt is frequently used, but the types of solder paste vary, and the choice of solder paste needs to be based on the processed products. Now, the solder paste manufacturer will explain this issue to everyone:

1. Leaded solder paste and lead-free solder paste

Lead-containing solder paste contains lead, which is highly harmful to the environment and human health. However, it has good soldering performance and low cost, and can be applied to some electronic products that have no environmental protection requirements. Lead-free solder paste contains only trace amounts of lead in its composition, causing less harm to the human body. It is an environmentally friendly product and is used in eco-friendly electronic products. Customers from Europe, America, Japan, South Korea and other countries all require the use of lead-free solder paste in production.

2. High-temperature solder paste, medium-temperature solder paste, low-temperature solder paste

1High-temperature solder paste refers to the lead-free solder paste commonly used, with a melting point generally at217℃The above welding effect is good.

2Medium-temperature solder paste, the commonly used lead-free medium-temperature solder paste has a melting point of170℃The primary feature of medium-temperature solder paste on the left and right is the use of imported special rosin,Good adhesion,It can prevent collapse.

3The melting point of low-temperature solder paste is138℃The low-temperature solder paste primarily contains bismuth components, which the surface mount components cannot withstand200℃When the temperature is above and the surface mount reflow process is required, low-temperature solder paste is used for the soldering process to protect the components that cannot withstand high-temperature reflow solderingPCBVery much.LEDWelcome to work.

Iii. Size of tin powder particles

According to the particle diameter and fineness of tin powder, solder paste can be classified as1,2,3,4,5,6,7,8Grade solder paste, among which3,4,5The most commonly used one is the number of followers.

The more precise the product is, the less tin powder is required. However, the smaller the tin powder is, the greater the oxidation area of the tin powder will be accordingly. In addition, the circular shape of the tin powder is beneficial to the quality of printing.

SMTThe higher the difficulty of the product in surface mount technology (SMT) processing, the more important the selection of solder paste becomes. Only solder paste that meets the product requirements can help reduce the quality defects of solder paste printing, improve the quality of reflow soldering, and lower the production cost.

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.