Future development trend of circuit board cleaning technology


The pcb circuit board is the link that carries the electronic components and connects the circuit. It is widely used in various fields such as communication equipment electronics, consumer electronics products, electronic computers, automotive electronics products, industrial control systems, medical machinery, national defense technology and aerospace. The development level of PCB circuit board manufacturers, an indispensable electronic component in electronic information products, can reflect the development speed and technical level of a country or region's electronic information technology industry to a certain extent. Let's take a look at the advantages and disadvantages of solvent-based cleaning agents.

Organic solution cleaning agents can be divided into flammable cleaning agents and non-flammable cleaning agents according to the safety factor. The former is mainly organic hydrocarbons, alcohols and esters, and the latter is mainly chlorinated hydrocarbons and fluorinated hydrocarbons. class etc. Its technological characteristics are introduced as follows:

HFC/HCFC: The main component is hydrogen-containing chlorofluorocarbons. The advantage is that it volatilizes well. The circuit board manufacturer cleans the PCB board and dries it faster. The disadvantages are that the price is relatively high, the cleaning power is weak, and it is not energy-saving and environmentally friendly. The damage caused by the ozone layer of the air will eventually be limited in future use. Chlorinated hydrocarbons: the main symbolic substances are dichloromethane, trichloroethane, etc., which have a strong ability to clean oily pollutants, are non-flammable and explosive, and are safe and reliable to use. Disadvantages are high toxicity and side effects, poor compatibility with plastics, rubber, etc., easy corrosion of circuit boards, and poor stability of such substances.

Hydrocarbons: mainly hydrocarbons, such as motor gasoline, kerosene, etc. Hydrocarbons have a strong cleaning ability for oily pollutants. In view of the low interfacial tension, it has a good cleaning effect on the gaps of pcb circuit boards. It does not corrode metals, has low toxic and side effects, and is easy to use. The most important disadvantage is that it is flammable and explosive, and there are potential safety hazards, so strict safety precautions must be taken. Alcohols: such as methanol, ethanol and isopropanol, etc. Alcohols have a strong dissolving ability for polar pollutants, and have obvious cleaning effects on rosin oil, but it is difficult to clean oily pollutants; it is not easy to corrode metals and plastics, etc., and dries quickly . The disadvantage is that it is highly volatile, easy to burn, and has potential safety hazards in use.

If the advantages and disadvantages of organic solution cleaning are taken into account and the advantages and disadvantages are avoided, water-based cleaning agents are created around solving these problems. Water-based cleaning technology is made of water as the cleaning medium and various additives such as surfactants, solvents, defoamers, and corrosion inhibitors. It removes various pollutants by means of dissolution, adsorption, and soaking. It can be combined with professional pcb circuit board cleaning equipment to achieve the purpose of cleaning. It is not difficult to see the characteristics of comprehensive solvent-based cleaning agents and water-based cleaning agents. With the improvement of safety, reliability and environmental protection awareness and the increasing demand for special cleaning of pcb circuit boards, the combination of water-based cleaning agents and professional pcb circuit board cleaning equipment symbolizes It shows the development trend of PCB circuit board manufacturers in the future of circuit board cleaning technology.

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