What types of SMT patch solder pastes are there?

inSMTSolder paste is an indispensable processing material in the turnkey surface mount technology (SMT) processing.Solder pasteSolder paste, also known as solder paste, is a new type of soldering material, mainly used forSMTPatch. It is generally a paste-like mixture composed of surfactants such as welding powder and flux, as well as thixotropic agents. DifferentSMTDifferent solder pastes will be used in processing requirements. So, what types of solder pastes are there? Below, the Shenzhen solder paste manufacturer will briefly share with you the types of solder paste:

I. Whether it contains lead

In electronic processing, solder paste is generally classified into leaded solder paste and lead-free solder paste based on whether it contains lead. Leaded solder paste poses a greater threat to the process and human health. HoweverSMTThe surface mount soldering effect is good and the cost is low. The lead-free solder paste contains only trace amounts of lead, which is less harmful to the human body. It is an environmentally friendly product and is applied in environmentally friendly electronic products.

Ii. Melting Point

In realitySMTIn the turnkey processing and production, solder paste is generally classified into high-temperature solder paste, medium-temperature solder paste and low-temperature solder paste based on its melting point.

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

2Medium-temperature solder paste, the commonly used lead-free medium-temperature solder paste has a melting point of170°CThe main feature of medium-temperature solder paste is the use of imported special rosin,Good adhesion,It can effectively prevent collapse.

3The melting point of low-temperature solder paste is138°C,Low-temperature solder paste mainly contains bismuth components. When the surface mount components cannot withstand it200°CWhen the temperature is above and the surface mount reflow process is required, low-temperature solder paste should be used for solderingIIt serves to protect the components that cannot withstand high-temperature reflow solderingPCB,Very much.LEDIndustry welcome.

Iii. Size of tin powder particles

According to the particle diameter of tin powder, solder paste can be classified as1,2,3.4,5,6Grade solder paste, among which3,4,5The most commonly used one is the number of followers.

The more precise the product is, the smaller the tin powder needs to be. However, the smaller the tin powder, the more its oxidation area will increase accordingly. In addition, a circular shape of the tin powder is conducive to improving the quality of printing.

SMTThe more difficult the products processed by surface mount technology are, the more important the selection of solder paste becomes. Only solder paste that meets the product requirements can effectively reduce printing defects, improve the quality of reflow soldering and lower production costs.

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 paste, lead-free solder wire, wave soldering rods, red glue and other solder solders. For more knowledge about electronic soldering, you can follow and contact us. Welcome to interact with us.