How to Clean PCBs in Our Daily Manufacturing Process?

In the PCB circuit board manufacturing process, cleaning is a very important link. Cleaning removes dirt and residue from the board surface, ensuring board quality and reliability. This article will introduce the methods and precautions of PCB cleaning to help you better clean PCB.

一. Cleaning method

1. Chemical cleaning method

Chemical cleaning is a commonly used PCB cleaning method. It can remove dirt and residue from the surface of the circuit board, but it needs to pay attention to the selection and use of chemicals. Generally speaking, the chemical cleaning method needs to use some organic solvents and acid-base solutions. When using chemicals, it is necessary to pay attention to safety and avoid the harm of chemicals to the human body and the environment.

2. Washing method

Water washing method is a simple, safe and environmentally friendly PCB cleaning method. It can remove dirt and residues on the surface of the circuit board, but you need to pay attention to the selection and use of water quality. Generally speaking, the water washing method requires the use of purified water or deionized water. When using the water washing method, it is necessary to pay attention to the purity and temperature of the water quality to avoid the influence of the water quality on the circuit board.

3. Ultrasonic cleaning method

Ultrasonic cleaning is an efficient, fast and thorough PCB cleaning method. It can remove dirt and residue on the surface of the circuit board, but it needs to pay attention to the frequency and power of the ultrasonic wave. In general, ultrasonic cleaning requires the use of an ultrasonic cleaner. When using an ultrasonic cleaner, it is necessary to pay attention to the frequency and power of the ultrasonic wave to avoid the impact of the ultrasonic wave on the circuit board.

二. Matters needing attention

1. Choose the right cleaning method

When cleaning the PCB circuit board, it is necessary to select the appropriate cleaning method according to the material, process and type of dirt of the circuit board. Different cleaning methods have different application scopes and effects, which need to be selected according to the actual situation.

2. Pay attention to the cleaning time and temperature

When cleaning the PCB circuit board, you need to pay attention to the cleaning time and temperature. Excessive cleaning time or high temperature will cause damage to the circuit board and affect the quality and reliability of the circuit board.

3. Pay attention to the selection and use of cleaning agents

When cleaning PCB circuit boards, attention should be paid to the selection and use of cleaning agents. Different cleaning agents have different scopes of application and effects, and need to be selected according to the actual situation. At the same time, it is necessary to pay attention to the concentration and usage of the cleaning agent to avoid the impact of the cleaning agent on the circuit board.

4. Pay attention to the drying after cleaning

After cleaning the PCB circuit board, it is necessary to pay attention to the drying of the circuit board. The circuit board needs to be dried in a dry environment to avoid the influence of moisture on the circuit board. At the same time, it is necessary to pay attention to the drying time and temperature to avoid the influence of excessive drying on the circuit board.

In short, cleaning is an important part of the PCB circuit board manufacturing process. When cleaning the PCB circuit board, it is necessary to choose the appropriate cleaning method, pay attention to the cleaning time and temperature, choose the appropriate cleaning agent and use method, and pay attention to the drying after cleaning. Only in this way can the quality and reliability of the circuit board be ensured.