Heavy Copper PCB

Heavy Copper PCB

A heavy copper pcb is a type of printed circuit board that has thicker copper layers. These thicker layers enable the PCB to handle high currents and provide excellent thermal management capabilities. It can also reduce voltage drop, making it a good choice for applications in harsh environments.

When designing a heavy copper PCB, you need to know that it will require larger minimum line widths and spacings. You should also discuss the thickness with your fabricator before the design process begins.


While standard PCBs are great for most applications, some products need thicker copper layers to meet certain design requirements. Thick copper PCBs can withstand high current flow and disseminate heat more quickly, making them ideal for military and aerospace equipment, thermal regulators, power adapters, and other heavy-duty circuit boards. However, the cost of these products is higher than those made from standard copper. This is because thicker copper requires more manufacturing time and resources to produce.

To ensure that the final product meets customer specifications, PCBs are manufactured in several steps. heavy copper pcb First, the design is checked by an engineer. This step is known as Design for Manufacturing (DFM). During this process, the engineer reviews each part of the board to make sure that it will work properly. After the design is approved, it is sent to the manufacturer.

Once the manufacturer receives the PCB design, they start manufacturing it. They print the design onto a piece of laminate and cover it with a contrast agent. This contrast agent is coated with photo-reactive chemicals that harden when exposed to ultraviolet light. This allows technicians to see the design on the surface of the PCB.

Next, the engineers shape and etch the copper layers of the PCB. Once the copper is ready, it can be merged with the rest of the layers. During this process, the manufacturers use an automatic optical inspection (AOI) machine to check for defects in the board. If any defects are found, the board will be reworked or rejected.


Heavy copper PCBs are used in a wide range of applications and are able to handle high currents. They can also withstand thermal stress and mechanical stresses, making them ideal for use in harsh environments. However, they are more expensive to manufacture than standard circuit boards. In addition, they require specialized etching and plating techniques. In order to design a board that uses heavy copper, the designer must gauge the amount of current required and determine its size and trace width. This information can then be used to calculate the copper thickness required for the board.

The thick copper layers in heavy copper PCBs also provide excellent thermal management. This is important because excessive heat can damage components and lead to product failure. The PCB manufacturer must ensure that the material selected for the substrate has a low thermal expansion coefficient to avoid cracks and layer separation, as well as a high glass transition temperature (Tg) to withstand high mechanical stress in plated-through holes.

Another challenge when designing a heavy copper PCB is the alignment of the different inner layers. The thickness of the copper foil can create a problem with the alignment of the cores. This can result in exposed copper in the winding cutouts and at the edge of the board. To prevent this, the fabricator should use indexed pins or auto-alignment lamination machines.


While heavy copper PCBs can offer higher current handling capacity than standard ones, they can also be difficult to assemble and require specialized plating techniques. This makes them more expensive to produce than standard PCBs. However, they are ideal for applications that require high power and temperature tolerance.

To make a heavy copper PCB, one must first choose a suitable dielectric material. This will depend on the circuit board’s specific requirements, such as thermal strain. In addition, the substrate should have a low coefficient of expansion to prevent cracks and layer separation. It should also be able to withstand high mechanical stress from plated through holes.

In addition, the heavy copper PCB must be insulated with an epoxy resin to protect it from moisture and environmental factors. It should also be free from halogen compounds to ensure safety. PCBs are often damaged or fail after they are sold, so it’s important to design them for repairability. This includes making space for replacement components and adding extra slots for expansion.

Heavy copper PCBs can be fabricated with a variety of different materials, including FR 4, FR 1 and FR 2. However, the etching process and plating processes must be carefully controlled to achieve uniformity. It is also important to select a manufacturer with experience manufacturing heavy copper PCBs.


Heavy copper PCBs are used in power electronics products to provide increased current capacity and circuit control. They use the thermal conductivity of the copper to disperse the heat generated by high-current devices. It also helps reduce the amount of space required for the circuit board. The copper traces on the circuit board are connected to each other via copper vias, which regulate the temperature of the device and prevent excessive heat from building up. The thermal conductivity of these devices is higher than traditional copper PCBs, making them the preferred choice for large power devices.

Heavy Copper PCBs require a different fabrication process than regular PCBs. The process involves multiple steps, including etching, plating, and finishing. The fabrication process allows the fabricator Heavy Copper PCB Supplier to create thicker copper traces and more durable boards. In addition, the process produces a more stable surface and improved solder masks.

The design process for a heavy copper circuit board requires a lot of attention to detail, including track and gap spacing. Depending on the application, the PCB may need to be able to handle high current and a wide range of temperatures. The designer should consider the current requirements and the width of the trace to determine the required thickness.

Heavy copper PCBs can be made in single- or double-sided designs. The manufacturing process of heavy copper requires a special pressing procedure. This method uses a great deal of pressure and a significant flow of PP glue. It can result in a large amount of glue passing through the open area, which leaves the opening of the layer with a thin film.