How to clean the circuit board, what to use to clean the circuit board, and how about the circuit board ultrasonic cleaning machine?

Cleaning of PCB board. In China's electronics industry, the vast majority of enterprises are using PCB. There are three kinds of flux used for PCB assembly and welding: water-soluble flux, rosin flux and no-clean flux. The first two are widely used, most of which are ultrasonic cleaning (and many of them are alcohol brushes). In principle, non-cleaning flux should not be cleaned. However, most manufacturers in the world still need cleaning even if they use non-cleaning flux to weld parts. In particular, high-density PCB and high-density IC pins are not cleaned or ultrasonic cleaning is not used.

It will inevitably lead to dust adsorption between high-density wires and IC pins. Once the environmental humidity is high, high-density wires and pins are prone to short-circuit failure. Once the environment is dry, the short-circuit fault will disappear by itself, which is not easy to find.

Therefore, electronic machinery factories all over the world insist on ultrasonic cleaning of PCB. In our country, the military electronic whole machine factory has begun to popularize, which has received double benefits of improving product reliability and reducing after-sales service cost. In the production of connectors, connectors, adapters and other devices, they must also be cleaned before electroplating and assembly, otherwise the dust and oil stains adsorbed on these assembled parts will definitely affect their conductivity and insulation performance, especially some complex multi-core connectors.

It is a good method to clean the circuit board with the cleaning machine produced by Shenzhen Jintai Ultrasonic Equipment Co., Ltd., and the cleaned circuit board is as clean as new. Based on the principle of ultrasonic wave, electric energy is converted into mechanical vibration to generate high-pressure bubbles, and the particles of cleaning agent impact the circuit board by using the explosive force of bubbles. When cleaning the circuit board, we should pay attention to the correct selection of ultrasonic power. Don't turn the ultrasonic power too high during cleaning. Its power is usually proportional to the volume of the container and the number of circuit boards to be cleaned. How much ultrasonic power to choose depends on the number of circuit boards to be cleaned. Generally, it is only suitable for a large number of circuit boards, and solvents used for cleaning circuit boards are generally acceptable. When cleaning the circuit board, be careful not to pile it up randomly, which will affect the cleaning effect. The solvent used is organic solvent, special cleaning agent for circuit board or environment-friendly electronic ultrasonic cleaning agent. It is not advisable to use anhydrous alcohol (anhydrous alcohol), otherwise the circuit board will turn white, commonly known as white spots.