Solder paste manufacturers briefly discuss the important role of solder paste in SMT patch processing?

Engaged inSMTFriends in the surface mount technology (SMT) processing industry should have already come into contact with itSolder pasteWhen purchasing this kind of material, people usually select it carefully and need to negotiate with the solder manufacturer for samples. This material is quite important. So, what role does such an important material play? Today, the solder paste manufacturer is here to have a chat with everyone:

In the past70During that period, due to the rise of surface mount technology, it was actuallySMT. This is a process of printing and applying solder paste on the through holes of the printed circuit board. At the same time, the electrical components of the printed circuit board are accurately pasted onto the through holes coated with solder paste. The electrical components are heated according to the corresponding reflux temperature curve to melt the solder paste. After the alloy components cool and freeze, they form solder joints between the electrical components and the printed circuit board, thus achieving metallurgical connection technology.

Capacitor, resistorICSuch as electronic devicesSMTPatch. Solder paste also has a certain viscosity at room temperature and can gradually fix electronic components in their existing positions. At the soldering temperature, due to the evaporation of solvents and some additives, the solder paste first melts and wraps the pins and solder joints. After cooling, it connects the electronic components to the printed circuit through the holesSMTThe patches are combined together to form a reliable link.

Solder paste can be a relatively complex standard system, which is a paste composed of solder powder, flux and other material additives, thereby changing its basic composition to suit various productsSMTSMT requirements. Thus, each component of the solder paste has its own distinct function.

The important functions of solder paste are mainly divided into several major modules. The first one is alloy powder: its purpose is to complete the mechanical and electrical components between electrical components.

Secondly, there is the flux: it serves as the carrier of tin powder particles, providing the most suitable rheological properties and humidity, and promoting heat transferSMTPatch area, reduce the liquid surface tension of the solderSMTSolder and during surface mount technologySMTThe surface of the patch is re-oxidized. The functions of the different components among them are as follows:

1Solvent: This solvent, which is a component of the flux, plays an automatic role in regulating uniformity during the mixing operation of solder paste and has a significant impact on the lifespan of solder paste products.

2Resin: This basic component basically enhances the adhesion of solder paste and also has the functions of repair and prevention after solderingPCBThe important role of re-oxidation; This basic component plays a crucial role in fixing the parts.

3Activator: This basic component has been basically removedPCBCopper film through hole surface layer and partsSMTThe role of oxidizing substances in the patch area,At the same time, it has reduced tin,The efficacy of the surface tension of lead liquid

4Thixotropic agent: This basic component mainly includes the automatic adjustment of the viscosity of solder paste and the performance of printing, playing an important role in preventing tailing, adhesion and other situations during printing.

If you want to master the difficult problems related to soldering methods such as flux paste, lead-free solder paste, and solder paste, we warmly welcome you to consult Shenzhen JJY Industrial Production High-tech Co., LTD. Let's learn and grow together!