PCBA circuit boards are widely used globally, and during the manufacturing of printed circuit boards, contaminants such as solder flux and adhesive residues, as well as dust and debris generated during production, can accumulate. If the PCB surface cannot be effectively cleaned, issues such as resistance and leakage can occur, leading to abnormalities in the PCB circuit board and affecting the lifespan of the product. Therefore, ensuring the cleanliness of PCB circuit boards during manufacturing is crucial. There are several methods for cleaning PCBA boards, such as the Silman Tech DEZ-C758 cleaning machine, as well as methods like water washing.
- Semi-aqueous rinsing typically involves using organic solvents and deionized water, along with a suitable amount of surfactants and additives to form a cleaning agent. This type of rinsing falls between solvent rinsing and water rinsing. These cleaning agents are organic solvents, which are flammable but have a high flash point and low toxicity, making them safe to use. However, they must be rinsed with water and then air-dried.
- Water cleaning technology is expected to be the trend in cleaning technology development. Establishing pure water sources and wastewater treatment workshops is essential. Using water as the rinsing medium and adding surfactants, additives, corrosion inhibitors, and chelating agents to the water produces a range of water-based cleaning agents. It can remove solvent and non-polar contaminants.
- No-clean technology is used for soldering processes without cleaning flux or solder paste. After soldering, the boards are directly rinsed in the next process without cleaning again. No-clean technology is currently the most commonly used replacement technology, especially for mobile communication products, which are mostly disposable and replaceable.
- Solvent rinsing is mainly used for solvent dissolution and removal of contaminants. Solvent rinsing requires simple machine equipment due to its fast evaporation and strong solubility characteristics.
- Ultrasonic cleaning utilizes ultrahigh frequencies to convert into kinetic energy in a liquid medium, generating cavitation effects and numerous tiny bubbles. These bubbles then impact the surface of the object, causing surface contaminants to dislodge, achieving a cleaning effect. Since it operates through liquid, it can reach every surface layer that the liquid contacts, leaving no dead spots. It can work simultaneously on multiple surfaces of objects. This method is very effective and fast, typically completing cleaning in about 15 minutes.
Each cleaning method has its own advantages, and choosing the most suitable one is crucial. The above are all the contents of PCBA circuit board cleaning techniques, and I hope they are helpful to you.