Heavy Copper PCB

heavy copper pcb

Heavy Copper PCB

Heavy copper PCBs are used in military weapons control systems, power supplies for RADAR systems, high current distribution boards and planar transformers. They provide a low impedance power distribution and save space. It is important to understand how to design a PCB that incorporates heavy copper.

The copper’s thickness, width, and plating weight are essential to determine its current-carrying capacity. Its durability is also crucial for a successful project.


Durability is one of the most important factors when choosing a circuit heavy copper pcb board. A durable PCB is able to resist the high current that can damage a regular PCB. It is also able to withstand repeated thermal cycles and high temperatures. This makes it a good choice for industrial electronics, automotive electronics, and renewable energy systems.

Copper has a standard thermal conductivity of 401W/mK, so it is no surprise that thick copper circuit boards have excellent heat dissipation capabilities. These boards are ideal for large components with high power losses, as they can absorb and dissipate heat quickly to prevent overheating. Moreover, they are also able to sustain high voltages and low currents for extended periods of time.

Heavy Copper PCBs are also able to resist high temperatures and corrosive environments. This makes them a great option for aerospace and defense applications, as well as for welding equipment and other industrial devices. They are also able to withstand shock and vibration.

When selecting a supplier for your heavy copper PCBs, it is important to consider the experience and expertise of the manufacturer. It is also important to consider the fabrication techniques and tolerances used. This will help you avoid potential design and production errors. Additionally, you should make sure that the supplier is able to deliver your PCBs on time and within budget.

Thermal conductivity

A heavy copper pcb is an advanced circuit board that uses copper to conduct electricity more efficiently. It is also more durable than standard PCBs and can withstand high current. However, it is important to keep in mind that this type of board requires specialized fabrication techniques and can be more expensive than other PCBs.

The copper thickness on a heavy-duty circuit board is often much higher than that of a regular PCB, making it difficult to fabricate with standard etching and plating methods. This makes it necessary to use advanced etching techniques that produce straight edges and good margins. In addition, the thickness of copper can limit the size of plated holes. This is because plated holes can weaken over time due to the mechanical stress placed on them. To reduce this problem, manufacturers can use heavy copper to add thickness to the walls of plated holes.

Heavy copper PCBs are used in many different applications, including electric vehicle chargers and power inverters. They are also often found in welding products, military equipment and automotive parts. They are typically used for high-current applications to prevent the sudden collapse of electrical systems. The copper used on these boards is up to 3 ounces per square foot and is thicker than that of standard PCBs. This means that they can withstand much more power than standard PCBs, and they are also able to carry a lot of heat.

Resistance to high current

PCBs that carry high currents need to be able to handle the excessive heat they produce. Copper is a good choice for this application, as it is highly conductive and does not lose energy through the air or by convection. In addition, it can support the requisite thermal management capabilities by dissipating the excess heat through the substrate material or by using external heat sinks. The etching process is also important for high current circuits, as it can help minimize copper thickness variations and ensure the continuity of the tracks.

In order to meet the demands of the industry, many designers use a technique known as subtractive etching, which uses a mask to Heavy Copper PCB Supplier protect the areas of the board that are not being used. It then uses acid to remove the unnecessary copper, leaving only what is needed. This procedure is very efficient, and it can be used on both double and single-sided boards.

Printed circuit boards that are designed to operate at high currents often require thick copper plating to increase their current-carrying capacity. The exact amount of copper required is determined by the impedance and compatibility requirements of the project. Thicker copper also allows for large PCB-cross-sections for power and control circuits, which helps to optimize the board’s thermal management. It can also improve the strength of plated holes, as it resists brittleness caused by repeated cycles during production.


PCBs that are designed with heavy copper can withstand high currents and temperatures, making them ideal for use in military/defense applications, automotive, solar panel and welding equipment manufacturing. The thicker copper traces can also help to dissipate heat and increase current carrying capacity. They also offer greater mechanical strength at connectors and plated through holes.

Unlike standard PCBs, which require multiple layers to make them flexible, heavy copper pcb can be made with just two layers of conductive foil. This makes them easier to fabricate and cost-efficient. They also have a higher tolerance capacity and can withstand harsh environments that would destroy regular PCBs in seconds.

This flexibility comes at a price, however, as it requires more expensive FR-4 and polyimide materials, thicker copper, etching and plating. The copper thickness is usually between 15um and 35um, depending on the application. For the best results, it is important to choose the right substrate material and copper thickness for your design.

Adding heavy copper features to your PCB can be challenging, but with proper etching and plating techniques, you can achieve the desired result. To avoid unacceptable undercutting and uneven trace sidewalls, you should consider using a high-quality etching process. Besides, if you’re working with a double-sided flexible board, you should ensure that the copper foil is plated on both sides of the board to prevent a short circuit.