PCB copper electroplating Providing reliable conductivity and Enhanced stability

Product Specification

1) Product Features:

Q75 is used as metal complexing agent, used as scaling powder and cleaner in electroless copper PCB plating.

2) Application
Concentration in the bath: 10-30 mg/L
Usage: It is soluble in water, weakly alkaline aqueous solution. Mainly used for chemical copper complexing agent.

The role of PCB copper electroplating

In the process of PCB board production, the role of copper plating is very important. First of all, copper is an electrical conductor that can provide excellent conductivity, thereby realizing the transmission of electronic signals on the PCB board. Secondly, the copper plating layer can increase the hardness and wear resistance of the PCB board and protect the board surface from damage. In addition, copper plating can also prevent oxidation and corrosion, and extend the service life of the PCB board. In general, the role of copper plating on PCB boards is to provide excellent conductivity, increase mechanical strength and protect the circuit of the PCB board.

The role of copper plating in PCB (printed circuit board) is mainly reflected in the following aspects:

1. Providing reliable conductivity: By forming a uniform copper layer on the insulating substrate of the PCB, copper plating ensures that electrical signals can be transmitted smoothly and connect various components, elements and circuits. This conductive layer lays the foundation for the normal operation of electronic equipment and improves the efficiency and accuracy of signal transmission.

2. Enhanced stability and durability: Copper plating helps to enhance the stability and durability of PCBs. By forming a consistent copper layer on the substrate, not only the structural strength of the circuit board is guaranteed, but also its corrosion resistance is improved, so that the PCB can operate stably for a long time under various environmental conditions, extending the service life of the equipment.

3. Realize complex circuit design: Electroplated copper can form delicate wires, connection points and circuit patterns by precisely controlling the electroplating process to meet the circuit requirements in different application scenarios. Copper is a good conductor, and the formation of a conductive layer can improve the efficiency and accuracy of signal transmission.

4. Improve electrical and thermal conductivity: Copper plating can significantly improve the electrical conductivity of the PCB, allowing electronic signals to pass through the circuit board more quickly and accurately. In addition, copper plating also has good thermal conductivity, helping to transfer the generated heat more effectively to other parts of the circuit board, and then discharge it through the heat sink. This is crucial to avoid PCB damage caused by overheating.

5. Improve mechanical stability: The bottom copper plating increases the mechanical stability of the PCB, making it less likely to be damaged when subjected to physical pressure. The copper plating layer protects the substrate of the PCB from damage caused by friction or impact.

6. Promote the PCB manufacturing process: During the photolithography and etching process, the bottom copper plating provides a protective layer for the PCB, which helps to protect other sensitive components from damage. This helps to improve the efficiency and yield of the PCB manufacturing process.

In summary, the role of electroplated copper in PCB is crucial. It not only improves the performance and reliability of the circuit board, but also promotes the development of PCB manufacturing technology.

How to copper plate PCB boards

The overall process of copper plating on PCB boards can be summarized as: cleaning PCB boards-coating photosensitive glue-exposure and development-copper plating-cleaning and trimming-final processing.

1. Make copperizing solution

First prepare a certain proportion of copperizing solution, which is generally composed of copper sulfate, sulfuric acid and hydrochloric acid. Mix copper sulfate and sulfuric acid in a certain proportion, add enough water, and stir evenly. Then gradually add hydrochloric acid to the mixture and continue to stir. The final liquid is the copperizing solution.

2. Clean the PCB board

Use detergent to clean the prepared PCB board to remove dirt and oxide layer on the surface. Then rinse with clean water and keep dry.

3. Apply photosensitive glue

Evenly apply the photosensitive glue on the copper-plated surface of the PCB board and use a light shield to block it. Then place the PCB board in a dryer to completely dry the photosensitive glue.

4. Expose and develop

Align the dried PCB board with the drawing layer and use an exposure machine to expose it. Then place the exposed PCB board in the developer and wait for the developer to dissolve the unexposed photosensitive glue part to reveal the copper disk pattern.

5. Copper plating

According to the revealed copper disk pattern, place the PCB board in the copperizing solution for copper plating. First, chemical copper plating is performed on the PCB board, and then electroplating is performed to make the copper layer more solid. According to different needs, copper plating can be performed multiple times to obtain a thicker copper layer.

6. Cleaning and trimming

The copper-plated PCB board is cleaned with dilute sulfuric acid to remove the oxide layer on the surface. Then trimming is performed to remove the excess copper layer, making the circuit on the PCB board clearer.

7. Final treatment

The trimmed PCB board is treated with anti-corrosion to protect the copper layer from oxidation and corrosion.

PCB copper electroplating Chemical nature

PCB copper electroplating Properties