Tips for cleaning PCB circuit boards

Cleaning a PCB board is a meticulous and important process that is critical to ensuring the performance and longevity of the board. Here are some tips for cleaning PCB boards:

First, choose the right cleaning method

1. Solvent cleaning:

Use ethanol, isopropyl alcohol, acetone and other solvents to remove dirt and contaminants from the surface of the circuit board. This method can quickly and effectively remove grease, dust and loose contaminants.

Note: Select the appropriate solvent, ensure that the solvent will not have a corrosive effect on the board, and dry thoroughly after cleaning to avoid short circuit or other damage.

2. Water cleaning:

Use pure water or water based cleaning agent for cleaning. Water cleaning can effectively remove dust and dirt from the circuit board, while avoiding the possible side effects of organic solvents.

Precautions: Ensure that the water source is pure and dry the circuit board thoroughly after cleaning to avoid short circuit caused by residual moisture.

Ultrasonic cleaning:

The use of ultrasonic energy vibration to separate the dirt and grease on the circuit board. This method has a fast cleaning speed and good effect, but attention should be paid to choosing the right cleaning fluid and equipment to avoid damage to the circuit board.

3. Dry ice cleaning:

Use the impact of dry ice (solid carbon dioxide) sublimation at room temperature to remove dirt and pollutants from the circuit board. This method is safe and effective, and will not cause corrosion or damage to the circuit board.

Precautions: Ensure that the workshop is well ventilated to avoid excessive carbon dioxide concentration caused by dry ice sublimation.

4. Fully automatic PCBA cleaning machine:

Suitable for large quantities of PCBA circuit board cleaning, with efficient and reliable characteristics. By spray cleaning, equipped with multiple nozzles and rotating devices, you can ensure thorough cleaning of the circuit board.

Second, cleaning steps

1. Pretreatment:

Remove large pieces of dirt and impurities from the surface of the circuit board to reduce the difficulty of cleaning.

2. Choose the right cleaning method and cleaning agent:

Select the appropriate cleaning method and cleaning agent according to the dirt type and material of the circuit board.

3. Cleaning:

Clean according to the operation requirements of the selected cleaning method, pay attention to control the cleaning time and temperature to avoid damage to the circuit board.

4. Drying:

After cleaning, dry the circuit board thoroughly to ensure that there is no residual liquid. Drying can be done using an oven or heat gun.

Third, precautions

1. Safety first:

During the cleaning process, be sure to wear protective equipment such as glasses and gloves to avoid splashing the cleaning agent into your eyes or skin.

2. Choose the right cleaning agent:

Ensure that the cleaning agent selected does not corrode the circuit board and meets environmental requirements.

3. Dry thoroughly:

After cleaning, dry the circuit board thoroughly to avoid short circuit caused by residual moisture.

4. Regular inspection and maintenance of cleaning equipment:

For equipment such as ultrasonic cleaning machines, regular inspection and maintenance are needed to ensure their normal operation and cleaning effect.

By following the above tips, you can effectively clean the PCB board and ensure its performance and life.