Friends engaged in SMT SMD processing should be no stranger to solder paste. When purchasing paste solder, they are often asked to carefully select the type according to the actual needs and test the samples with Nofel solder manufacturers. This is a very important material. So, what role does such an important material play? Suzhou Neufeld next for your interpretation:

In the 1970s, surface mount technology just began to rise, also known as SMT. this is a printed circuit board pads printed and coated with solder paste technology, in the coated solder paste pads accurately paste the surface of the electronic components, and according to a specific reflow temperature profile to heat the circuit board, so that the solder paste melted. After its alloy composition is cooled and solidified, a solder joint is formed between the component and the printed circuit board to achieve a soldered electronic component connection.

Solder paste is a new type of soldering material that came into being along with the emergence of SMT technology. It is a kind of solder used to connect the electrode of the parts with the pad of the circuit board, and is mainly used in the SMT industry for the soldering of electronic components such as capacitors, resistors and ICs on the surface of the PCB. Solder paste at room temperature also has a certain degree of viscosity, can temporarily stick electronic components in the established position fixed, in the welding temperature, with the solvent and part of the additives volatilisation, the solder paste first melted to fix the pins and soldering, to be cooled down after the electronic components and printed circuit pads welded together to form a stable connection.

Solder paste is a complex system, is a mixture of solder powder, flux and other metal additives into the paste, and change its composition to meet the soldering needs of different products. Therefore, the components that make up a solder paste all have different roles.

The role of solder paste is mainly divided into these modules, the first is the role of the alloy powder, is to complete the mechanical and electrical connection between the electronic components and the circuit board.

Secondly, there is the flux: it is the substance of the tin powder particles, which provides the right rheology and humidity, facilitates the transfer of heat to the soldering area, reduces the surface tension of the solder, and prevents the re-oxidation of the solder and the soldering surface during soldering. Among them, the role of the different components are as follows:

1, the solvent (Solvent): The component is the solvent of the solder component, in the mixing process of the solder paste plays a role in regulating the uniformity of the life of the solder paste has a certain impact;

2, the resin (Resins): the component mainly play an increase in the adhesion of solder paste, but also to protect and prevent the role of solder PCB oxidation again after welding; the component plays a very important role in the parts fixed.

3, the activator (Activation): This component mainly plays the role of removing the PCB copper film pad surface layer and parts of the oxidation of the soldered parts, and at the same time has the effect of reducing the surface tension of tin, lead;

4, thixotropic agent (Thixotropic): the component is mainly to regulate the viscosity of the solder paste and printing performance, to play a role in the printing to prevent the phenomenon of tail dragging, adhesion and so on;

As an 18-year veteran solder paste manufacturer, Nofil Electronic Technology is always committed to the research and development, production and sales of solder paste. Our products are of stable quality, no continuous tin, no false soldering, no cracks; no tin bead residue, bright and full solder joints, solid welding, strong conductivity. If there is a need to use, you can contact our technology, free of charge to provide solutions to solve your problems!

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Some special types of solder paste are prone to drying out, and general solder paste suppliers are equipped with special solvents - thinner. However, for some brands of solder paste, there is no major quality problem itself, so they cannot provide solvents for you to add. The next step is for Suzhou Noble Flower solder paste manufacturers to say a few words:

When the solder paste is dry, never dilute it with water.

Tin paste is absolutely prohibited to mix with water, if a small amount of tin paste for occasional use, can be mixed with a small amount of alcohol, stirred well after use; if the content of the tin paste is large, it needs to be mixed with a special thinner.

Solder paste in the storage and use of the process will always produce chemical reaction, although this reaction is inevitable, but the reasonably designed solder paste in the normal use of the conditions of the reaction rate should be quite slow, so that its service life is sufficient to cope with normal production needs. It can be transported in refrigerated trucks and stored in factory warehouses using freezers for refrigeration. Solder pastes that are prone to drying out are often the result of defects in the design of the formulation. Additionally, ensuring a compliant operating environment and standardized handling can extend the life of the paste. Other factors, such as solvent evaporation during use, may also have an effect on the service life, but are not a major factor.

In the use of solder paste in the process, to strictly comply with the specifications for the use of solder paste, otherwise it will affect the characteristics of the solder paste itself, resulting in poor soldering; that to use what brand of solder paste is better.

Recommended Noble Flower lead-free solder paste, a wide range of uses, environmental protection solder paste professional to rest assured that can meet the SMT production of temperature resistance has special welding requirements of the product. Consulting customer service staff, for you to recommend high quality, good price and cheap solder paste products, good quality and good service is our advantage!