Heavy Copper PCB

Heavy Copper PCB

Heavy copper pcbs offer excellent current conduction. This enables them to dissipate excess heat and reduce failure rates. In addition, these PCBs are strong and durable.

PCB designers must carefully consider how much current the board can carry when designing it. This includes determining the copper thickness and width and the maximum temperature rise it can withstand.


Heavy copper circuit boards are growing in popularity due to the increasing demand for high current and power systems. These boards are ideal for power converters, heat indulgence, and planer transformers. They heavy copper pcb are also used in industrial and military applications. These PCBs are multi-layered with detailed exterior layers and thick copper inside, enabling them to handle heavy current output. This is possible due to the material’s excellent electrical and thermal conductivity.

When designing a circuit board using heavy copper, designers should be aware of the thermal conductivity of this material. They should choose a substrate material with a high glass transition temperature and a high copper thickness, to ensure that the board can withstand a high current. They should also pay attention to the copper’s trace width, as it can affect the performance of the circuit board.

A PCB fabricated with heavy copper is more difficult to produce for manufacturers because of the higher amount of copper needed. This can lead to higher costs, but it is essential that the designer and fabricator discuss manufacturing tolerances and capabilities before beginning the design.

Another benefit of heavy copper is its good extension performance, which allows for a lower layer count and increased power density. It is also easier to work with, and has better corrosion resistance. The material also offers exceptional thermal conductivity, making it suitable for many different applications.

Thermal Conductivity

A heavy copper PCB is a type of printed circuit board that has more than 3oz of pure copper in both internal and external layers. Its superior conductivity allows it to carry more current than standard PCBs and reduce the size of devices. It also helps to distribute heat more efficiently, which improves the performance of devices.

The thermal conductivity of a copper PCB depends on the thickness of its traces and its temperature increment. To maximize the thermal conductivity of a copper PCB, you should select a copper trace width that’s proportional to the amount of current it can handle. You can do this by observing the current consumption of a given copper PCB and measuring its temperature increment.

PCBs with substantial copper content require specialized etching and plating techniques, including differential etching and high-speed/step plating. Historically, copper PCBs were formed by etching thick laminated clad copper materials. This resulted in uneven trace sidewalls and unacceptable undercutting. However, with technological advancement, manufacturers now use a combination of etching and plating to create copper features with straight sidewalls and negligible undercut.

PCBs with substantial copper content have higher tolerance capacity than conventional PCBs and can withstand excessive current, elevated temperatures, and recurring thermal cycling. This makes them ideal for applications that will be exposed to rough environments, such as military weapons control systems and power converters. These boards are also more resistant to corrosion, heat, and humidity.


Heavy copper PCBs have gained popularity in the electronics industry because of their strong electrical and thermal conductivity. They are used in a wide range of products, including planar transformers and power converters. They also have an increased current-carrying capacity. However, they can be difficult to design because of their thicker traces and plating thickness. This is why it is important to consult with a qualified PCB fabricator before designing your circuit boards.

Unlike standard PCBs, heavy copper designs require special consideration for the lamination process. Because the copper is thicker, it creates gaps between traces that need to be filled with resin. If this is not done properly, the gaps can cause a delamination problem that can be expensive to repair. In addition, it can result in the loss of copper from the board.

In order to avoid this, designers can use a different fabrication process for heavy copper PCBs. They can ask their PCB fabricator to use a different etching and coating technique, which is better suited for this material. This can help them achieve the desired result with less copper loss and a better-quality board. Moreover, they can choose the right layer count and dielectric thickness for their needs. This can help them save money by reducing the number of layers they need to fabricate.


Heavy copper PCBs are often required in higher-end products with specialized needs like extreme weather conditions or high power density. In these cases, normal thickness copper traces would burn or melt, making heavy copper a more suitable choice. Heavy copper circuit boards also have greater heat-dissipating capabilities. They can withstand higher critical current densities and allow for more complex designs with smaller footprints and lower impedance.

In addition, thicker copper increases the stability of transmission signals under harsh conditions. This makes it a great choice for military and aerospace grade applications that require reliability in extreme temperatures or harsh use environments. Heavy Copper PCB Supplier Heavy copper PCBs are also more resistant to corrosion than standard boards.

PCB manufacturers are now offering heavy copper plating to meet the demand for high-current applications. These boards are usually manufactured with 3 or more ounces of finished copper on both the inner and outer layers. This is a major improvement from 1OZ or 2OZ, which are used in regular printed circuit board production.

Heavy copper PCBs are used in a wide range of products, including high-voltage circuits and military equipment. These boards are capable of withstanding increased current levels and reducing the overall cost of the device. They also have better thermal management capabilities, which ensures the performance and lifespan of your circuit board.