PCB News - Share what is the cleanest tips for washing pcb boards

Share what is the cleanest tips for washing PCB boards

In the process of PCB board production, cleaning the circuit board is an important step. If the surface of the circuit board cannot be effectively cleaned, resistance and leakage will cause the circuit board to fail and have a great impact on the service life of the PCB board. So, what is the cleanest to wash the PCB board? The editor compiled the following methods to clean circuit boards to share with you.

1. Semi-water cleaning

Mainly use organic solvents and deionized water, plus a certain amount of active agent, a cleaning agent composed of additives. This cleaning is between solvent cleaning and water cleaning. These cleaning agents are organic solvents, flammable solvents, high flash point, low toxicity, and safe to use, but they must be rinsed with water and then dried.

2. Water purification technology

Water purification technology is the development direction of clean technology in the future, and it is necessary to establish pure water sources and discharge water treatment workshops. Using water as the cleaning medium, surfactants, additives, corrosion inhibitors and chelating agents are added to the water to form a series of water-based cleaning agents. Can remove water solvents and non-polar contaminants.

3. Solvent cleaning

It is used in the soldering process without clean flux or clean solder paste, and directly enters the next process for cleaning after soldering. Solvent cleaning technology is currently the most commonly used alternative technology, especially mobile communication products are basically a one-time use method To replace ODS. Solvent cleaning is mainly used for solvents to dissolve and remove contaminants. Solvent cleaning requires simple equipment due to its fast volatilization and strong solubility.

4. Ultrasonic cleaning

Ultrasonic cleaning machine uses ultra-high frequency to transform into kinetic energy in the liquid medium to produce cavitation effect, form countless tiny bubbles, and then hit the surface of the object, causing surface dirt to fall off, so as to achieve the cleaning effect. Because it passes through the liquid, as long as the surface that the liquid can touch, it can be cleaned in place, leaving no dead corners. Ultrasonic cleaning can work on each surface of multiple objects at the same time. It is very effective and fast, and can be cleaned in about 15 minutes. The advantage of using ultrasonic cleaning is that it can effectively restore, improve the ability of pads and components, and reduce electromagnetic interference.

The above are the cleaning methods of "what is the cleanest for PCB board", I hope it will be helpful to you.