PCB News - Share tips on cleaning PCB

PCB is widely used in China. It will cause air pollutants in the whole process of PCB production and PCB manufacturing, including smoke, dust, debris and other air pollutants in the whole process of production and manufacturing, such as the residue of flux and adhesive. If the PCB board can not reasonably ensure the cleaning of the surface, the resistor and power will cause the PCB circuit board to be invalid, which will endanger the service life of the commodity. Therefore, cleaning PCB board in the whole process of manufacturing is a key step.

The key to semi water cleaning is to use solvent and double distilled water, plus a certain amount of surfactant and preservative. This kind of cleaning is close to the middle of organic solvent cleaning and water cleaning. This cleaning solution is a solvent, flammable organic solvent, with high opening flash point and low toxic and side effects. It is safe to use, but it must be cleaned with tap water and then dried. The technology of water purification system is the development trend of cleaning technology in the future. It is necessary to create a production workshop for purified water resources and sewage treatment. A series of water-based cleaning solutions are produced by adding surfactant, modifier, corrosion inhibitor and chelating agent to water. It can remove water, organic solvents and non optical air pollutants.

It is used for cleaning without cleaning flux or cleaning in the whole process of electric welding. With the solder paste, it goes to the next process immediately after welding. It is not completely free. Cleaning technology is the most common alternative technology at this stage, especially in the way that most mobile communication commodities are used at one time to replace ODS. Organic solvent cleaning is suitable for dissolving organic solvents to remove air pollutants. Organic solvent cleaning requires simple machinery and equipment because of its fast evaporation and strong solubility.

The four cleaning techniques can achieve a certain cleaning actual effect, but how can we reasonably clean the PCB board? The application of ultrasonic cleaner can obtain treatment. It uses the effect of ultra-high frequency to convert into mechanical energy in liquid materials, resulting in cavitation effect, producing thousands of fine bubbles, and then collide with the surface of the object block to make the surface stains fall off, so as to achieve the actual effect of cleaning. Because this is based on the liquid, if the liquid can touch the surface of the surface, it can be cleaned in time without leaving a blind area.

It can also work on each surface of several blocks. It is very reasonable and fast and can clean up for about 15 minutes. One advantage of ultrasonic cleaning is that it can recover reasonably, improve the working ability of pads and components, and reduce interference signals.