How to Make Thin Copper PCBs

Make Thin Copper PCBs

When a printed circuit board is required to carry large currents, it may require heavy copper. These types of PCBs are often found in power supplies and other high-current applications. They have the ability to handle higher currents while providing good thermal distribution. They also offer better mechanical strength at connector sites. In addition, they support repeated thermal stress and can withstand corrosive environments. These factors allow thick copper pcb to be used in a variety of applications in harsh conditions.

The manufacturing process for heavy copper PCBs begins with raw materials. These are cut according to the size of the PCB and roughened with brushing, micro-etching, and other processes. Next, the copper foil is deposited on the glass epoxy substrate. The copper foil is then tin or gold plated. This helps to ensure that the traces have excellent conductivity and EMI shielding.

The copper is then etched to remove impurities and create the desired electrical characteristics. The etching process is more involved than standard PCB production, as the metallization of copper on the substrate requires higher lamination pressure and temperature. In addition, the etch time must be longer to provide strong adhesion between copper and dielectric.

How to Make Thin Copper PCBs

In order to make a good quality heavy copper PCB, it is necessary to control the etching process. Uneven copper etching can lead to uneven trace sidewalls and unacceptable undercutting, so it is important to use a combination of plating and etching techniques. It is also important to minimize the etch length and agitation in order to achieve consistent etch performance.

After etching, the PCB is ready for plating and finishing. This step involves applying a layer of gold or tin over the pads and vias to improve solderability and protect against corrosion. In addition, the edges of the board are profiled for smoothness and rounded corners to prevent crack initiation. Finally, the PCB is subjected to a series of electrical and AOI inspections to validate functionality and quality before shipping.

When it comes to a PCB that requires a high level of reliability, there are few options better than a heavy copper PCB. With their increased current-carrying capacity, heat dissipation, and mechanical strength, these boards are the perfect choice for a wide variety of high-current applications.

With strict process controls, advanced production facilities, and veteran engineering support, JHYPCB is a trusted partner for heavy copper PCB fabrication. Our rigorous quality standards and reliability testing ensure that these PCBs will withstand the demands of harsh environments, extreme temperatures, and repeated thermal stresses. Contact us today for more information on how we can help you manufacture a high-reliability thick copper PCB.