Tips for Controlling the Quality of Heavy Copper PCBs

In electronics manufacturing, printed circuit boards (PCBs) are the backbone of electronic devices. With modern devices becoming more complex, the need for strong and reliable PCBs has only increased. One kind of PCB that has gained popularity in recent years is the heavy copper PCB, which possesses greater copper thickness compared to standard PCBs. This PCB’s thick copper layers increase its ability to withstand corrosion, and heavy copper boards also facilitate better heat dissipation. However, it’s more challenging to manufacture heavy copper PCBs when compared to traditional PCBs. Here are some tips to help control the quality of heavy copper PCBs.

1. Take the requirements of heavy copper PCBs into consideration from the design stage.

Heavy copper PCB design differs from standard PCB design since its copper layer thickness is larger. It is essential to communicate your heavy copper PCB needs from the beginning with your designer. This awareness of the design requirements will help reduce the likelihood of a low-quality final product. Heavy copper PCB design considerations include track widths, board thickness, and the layer stack.

2. Work with experienced PCB manufacturers.

When creating heavy copper PCBs, engaging an experienced manufacturer is highly recommended since this PCB manufacturing process differs from that of traditional PCB manufacturing. Maintaining the quality of heavy copper PCBs during the manufacturing process is vital, and an experienced service provider can ensure that the process is carried out correctly.

3. Opt for Parametric Evaluation Tools.

Parametric evaluation tools assist in detecting defects in PCBs during production. Scratches, copper plating issues, and other defects that could lead to frequent downtimes can be identified through the use of these tools. These issues can be sorted immediately before any critical harm befalls the PCB production process. Although these tools are costly, they offer significant savings in the long run by reducing wastage by minimizing the likelihood of defective PCBs leaving the manufacturing facility.

4. Advanced Quality Control Techniques.

Another method of maintaining high-quality heavy copper PCBs is with Advanced Quality Control Techniques. It would be best to have a strong Quality Control Team to carry out inspections by taking advantage of AOI, AXI, or Flying Probe testing technologies. The flying probe tester, for example, offers a highly accurate measurement of the continuity and isolation of copper circuit production. These methods provide clear and accurate inspection results, cutting the downtime for test preparation, and improving the efficiency of the PCB manufacturing process.

5. Proper Selection of Materials.

In producing high-quality heavy copper PCB, it’s essential to choose the right materials carefully. Begin by selecting a substrate, welding resistance, board thickness, and plating options that are compatible with your PCB requirements. It is important to ensure the laminate’s capabilities align with the board’s layer thickness, as well as make sure that the right grade of copper foil is used. By selecting the appropriate materials that support your requirements from the initial manufacturing stage, the probability of having a low-quality board can be eliminated.


Manufacturing heavy copper PCBs is not an easy task, but it can be accomplished with some knowledge of the unique requirements of this kind of PCB. By following these tips, one can ensure that the process produces high-quality boards. Engage an experienced PCB service provider, incorporate advanced quality control techniques, remain vigilant during the design process, select the right materials, and monitor quality control throughout the manufacturing process. When all these measures are taken, the final product will always meet standards and exceed customers’ expectations!