Engaged inSMTFriends in the surface mount technology (SMT) processing industry should all have come into contact with itSolder paste. When purchasing this kind of material, they are often asked to choose carefully and they need to negotiate samples with solder manufacturers. This is a very important material. So, what role does such an important material play? Today, JJY solder Paste Manufacturer will have a chat:

in20Century70In the years, surface mount technology emerged, that isSMT. This is a technology for printing and coating solder paste on the pads of printed circuit boards. Decorative components on the surface are accurately adhered to the pads coated with solder paste, and the circuit board is heated according to a specific reflow temperature curve to melt the solder paste. After the alloy components are cooled and solidified, solder joints are formed between the components and the printed circuit board, achieving metallurgical connection.

Solder paste accompaniesSMTThe emergence of technology has given rise to a new type of welding material. It is a kind of solder used to connect the electrodes of parts with the pads of circuit boards, mainly used forSMTIn the industryPCBSurface capacitance, resistanceICSoldering of electronic components, etc. Solder paste also has a certain degree of viscosity at room temperature, which can initially bond electronic components to the designated positions and fix them in place. At the soldering temperature, as the solvent and some additives evaporate, the solder paste first melts and wraps around the pins and solder joints. After cooling, it solders the electronic components to the printed circuit pads, forming a stable connection.

Solder paste is a complex system, a paste composed of solder powder, flux and other metal additives, and its composition is changed to meet the soldering requirements of different products. Therefore, the components that make up solder paste all have different functions.

The functions of solder paste mainly fall into several major modules. The first one is the alloy powder function, which is to complete the mechanical and electrical connection between electronic components and circuit boards.

Secondly, there is the flux: It serves as the carrier of tin powder particles, providing appropriate rheological properties and humidity, which is conducive to the transfer of heat to the soldering area, reduces the surface tension of the solder, and prevents the solder and the soldering surface from re-oxidizing during soldering. Among them, the functions of different components are as follows:

1Solvent(Solvent)This component serves as a solvent for the flux components and plays a role in regulating uniformity during the stirring process of the solder paste, having a certain impact on the lifespan of the solder paste.

2Resin(Resins)This component mainly serves to enhance the adhesion of solder paste and also provides protection and prevention after solderingPCBThe effect of re-oxidation; This component plays a very important role in fixing the parts.

3Activator(Activation)This component mainly serves to removePCBThe role of oxide substances on the surface layer of copper film pads and the welding parts of components,It also has the effect of reducing tin,The efficacy of lead surface tension

4Thixotropic agent(Thixotropic)This component mainly regulates the viscosity and printing performance of the solder paste, playing a role in preventing phenomena such as trailing and sticking during printing.

As a 15-year-old veteran solder paste manufacturer, JJY has been committed to the research and development, production and sales of solder paste. Our product quality is stable, with no solder connection, no false soldering, and no monument erection. Residual Wuxi beads, bright and full solder joints, firm welding, and excellent electrical conductivity. If you have any needs, please feel free to contact us.