Question

How to use copper solvent to remove excess copper from the inner layer of PCB board?

Answer 1

Using copper solvent to remove excess copper from the inner layer of PCB boards is a common processing method. The following are the specific steps:

1. Put the PCB board to be processed into the soaking bucket, and then add copper solvent so that the PCB board is completely immersed in the copper solvent.

2. Use a soft brush or cleaning tool to gently remove the copper substance on the surface of the PCB board to ensure that the structure and circuit connections of the circuit board are not damaged.

3. After cleaning is completed, take out the PCB board, rinse it with clean water, and then dry it.

4. After drying, you can use electroplating or chemical plating to cover the surface of the PCB with a protective film to prevent the circuit board from corrosion and oxidation.

It should be noted that copper solvent has a certain degree of toxicity, so you need to wear protective gloves and masks during the operation to avoid skin contact with copper solvent, and operate in a well-ventilated environment. In addition, in order to ensure the quality and effect of copper solvent, it is recommended to choose a regular copper solvent manufacturer.

Answer 2

Using copper solvent to remove excess copper from the inner layer of the PCB board is a chemical method. The specific steps are as follows:
1. Prepare the required materials: copper solvent, gloves, protective glasses, rubber gloves, rubber soles, plastic buckets, filters or filter membranes, stirrers, measuring cups, scales and heating equipment.
2. Prepare the copper solvent according to the instructions. Generally, copper solvents are mixed with water in specific proportions.
3. Put the PCB board to be processed into a plastic bucket to ensure it does not overflow.
4. Pour the prepared copper solvent into the plastic bucket and ensure that the solution completely covers the PCB board.
Heat the solution to the appropriate temperature, which depends on the copper solvent recipe. Generally speaking, heating can increase the rate of dissolution.
5. Stir the solution continuously to promote the dissolution of copper.
6. Wait for a while until the copper in the PCB board is completely dissolved.
7. Use a filter or filter membrane to filter out impurities in the solution.
9. Pour the solution and rinse the PCB board with clean water to ensure that there is no residual copper solvent.
10. Dry the PCB board with a clean cloth, and then perform necessary inspections to ensure that there is no residual copper.

It should be noted that copper solvents are corrosive, and protective equipment such as gloves, protective glasses, and rubber gloves are required when handling. In addition, copper solvents can be irritating to skin and eyes, so direct contact should be avoided. If you are not familiar with this method, please do it under the guidance of a professional.