Heavy Copper Printed Circuit Boards Manufacturer

Heavy Copper Printed Circuit Boards Manufacturer

Heavy Copper PCB Factory

2-20oz Copper PCB Service

Feature: 2Layer, 15/15oz copper,3.2mm board thickness, 150x120mm



Heavy copper Printed circuit boards/ PCB  helps in the dispersion of heat and lowers its core temperature. It can transfer the heat of the component at a faster rate. as a PCB Manufacturer, FX PCB can make copper thickness up to 20oz, please see our capability in detail for heavy copper Printed circuit boards.

The Heavy Copper PCB of Manufacturing  Capability:

Item Capability Classification Mass Production Sample Capacity
Structure Grading Goldfinger M
Gold finger length M
Steps gold finger
Accuracy of critical dimension Goldfinger zone thickness tolerance +/-10% +/-8%
Chamfer +/-5mil +/-4mil
Accuracy to shape +/-3mil
Accuracy to pattern +/-1mil +/-0.8mil
Mixed compression Type 16 28
Accuracy of graph Line precision +/-1mil +/-0.8mil
Accuracy Of Buried Resistor Buried resistance precision +/- 10%
Counterpoint Graph ≤1.2mil ≤1mil
Interlamination +/-7mil +/-6mil
Line width /spacing 3oz 6/8 6/6
4oz 8/8 7/6
5oz 8/10 8/8
6oz 12/12 10/10
7oz 12/14 12/12
8oz 12/16 12/16
10oz 12/18 12/18
12oz 12/20 12/20
Solder Mask 4mil 3.5mil
3-5oz Min Ring Width For Inner Layer Aperture 1.0~1.5 12mil
Aperture 1.5~3.0 20mil
Aperture 3.0~4.0 24mil
Aperture >4.0 30mil
Layer Count 3oz 20 layers 24 layers
4oz 20 layers 24 layers
5oz 16 layers 20 layers
6oz 16 layers 20 layers
7~12oz 10 layers 12 layers

Heavy Copper Printed Circuit Boards Manufacturer

Heavy copper-printed circuit boards have revolutionized the world of power supply and electronic appliances. With heavy copper printed circuit boards’ capability of transferring high-voltage and high-electricity, different industries are using them for versatile uses.

It has increased the demand for heavy copper PCBs so high that manufacturers find it hard to meet the demand. On top of it, most heavy copper printed circuit board manufacturers fail to maintain the high-quality production process and materials for these PCBs. It leads to faulty heavy copper PCBs and will hurt the appliances and accessories big time.

Look for FX PCB for high-quality and superior heavy copper printed circuit boards. FX PCB has been manufacturing the best heavy copper printed circuit boards for years. With excellent experience, FX PCB is committed to delivering superior heavy copper printed boards on time.

If you wish to expand your electronic devices, power supply, and relevant production, you should opt for FX-made printed circuit boards for heavy copper applications.

What Is Heavy Copper Printed Circuit Board?

Heavy copper printed circuit boards most commonly refer to multiple layers of copper foil bonded on a glass epoxy substrate. Thus, the glass epoxy work as the base, and manufacturers will bond multiple layers of copper on it. Usually, the copper foil will have four different thicknesses. It includes:

  • 18μm
  • 35μm
  • 55μm and
  • 70μm

Among these four different thicknesses of copper foil, 35μm boards are the most common. So, it has become a standard norm for PCB manufacturers to choose 35μm copper foils for the boards. They will, however, use other copper foils to meet the customization and demands.

Also, in China, manufacturers choose copper foil thicknesses from 35μm to 50μm. The printed circuit boards’ actual thickness depends on the substrate’s thickness. These are:

  1. The thickness of the composite copper boards will be 35μm if the thickness of the substrate is 1mm to 3mm. It is a standard thickness variation for the copper foils and the associated substrate for the printed boards.
  2. The copper foils will be 18μm thick when the substrate thickness is less than 1μm. As you see, the thick copper boards have almost 3X more depth. It allows them to conduct high-voltage and high-electricity for advanced applications.
  3. For copper foils with a thickness over 50μm, the substrate of it will be 5mm thick. It is among the thickest printed circuit boards you will ever find in the market.

A few features of the heavy copper printed circuit boards:

Heavy copper foils for printed circuit boards have different features. These features make the thick copper PCBs highly usable and demandable in various gadgets and accessories manufacturing. The resistance value for each 10mm length of the copper boards is 5mΩ for the standard 35μm thickness. Its inductance will be 4nH.

It will generate 0.15mV and 24mV of noise voltage at 30mA working current. There will be 6mA/ns of current flow for it. However, this estimated noise voltage generation, working current, and resistance will vary depending on the copper foil thickness. So, it allows people to customize the copper board according to their necessity.

Why You Need To Use Heavy Copper PCB: Top Benefits

Heavy copper printed circuit boards have seen a recent influx in their uses and demands. Various industries use the heavy copper PCB for many high-end applications. So, what makes the thick and heavy copper printed circuit boards so beneficial? What are the actual advantages of using heavy copper PCBs over regular ones?

Heavy copper printed circuit boards have a better capacity to transfer higher voltage, electricity, and heat dissipation. These printed circuit boards also have reduced thermal strain for more electricity transfer facilities. All these benefits allow heavy copper PCBs to be used in high-end jobs.

Improved current carrying capacity:

The more powerful devices you build, the more current it needs to work correctly. Thankfully, heavy copper circuit boards are designed to carry more electricity to run powerful devices that need more current flow for operation.

It happens due to the increased thickness of the copper foils used in the circuit boards. The circuit will have increased cross-sectional areas as the manufacturer increases the thickness of the board. The current carrying capacity works proportionally with the cross-sectional area of the circuit. So, with more depth of the PCBs, it has more cross-sectional places, which improves the electricity flow.

Henceforth, heavy copper boards can deliver large currents to larger devices than the normal copper PCB. So, you will see its application in military weapons, larger home appliances, and any device that needs more currents. It has enabled the manufacturer to consistently increase the thickness of the printed heavy copper boards for excellent applications.

More thermal strain endurance:

Another top benefit of heavier copper boards is their increased thermal strain endurance. Usually, standard copper PCBs have limited endurance to thermal strains. So, they have limited current carrying capacity. It limits the device’s performance and disallows the manufacturers to boost the strength of home appliances, military weapons, and high-end devices.

Thankfully, heavy copper PCBs don’t have such restrictions. Its lower electrical conductivity will control the temperature rise significantly. As copper has low electrical conductivity, the temperature rise of the PCBs isn’t so high. Consequently, the temperature rise of the PCBs is minimal. It helps lower the thermal strain and improves its endurance capacity.

  • At one end, it triggers the current flow for better performance. It also allows the device to receive more electricity without extreme strain on the circuit boards.
  • On the other hand, thermal endurance and low rise of heat improve the consistency of the circuit boards. They will not see voltage drops to damage and stop the appliances.
  • Better thermal endurance enables the circuit boards to be used in the harshest jobs. It also extends the lifespan of the circuit boards superbly with better consistency.

All these are attributed to the low conductivity of the copper. As the electrical conductivity chart shows, copper has the second lowest conductivity capacity after silver. On the contrary, iron has more electrical conductivity and the lowest thermal endurance.

Better heat dissipation capacity:

Copper is famous for its excellent heat dissipation performance. So, with thicker copper foils on the printed circuit boards, you can expect it to deliver better heat dissipation performance. And these heavy copper PCBs will deliver it exactly to you.

Copper has a standard 401W/mK for thermal conductivity. As you see, it has more thermal conductivity; it will dissipate the heat faster too. It helps the devices to dissipate the heat faster and deliver stable performance. It is also valuable for running the devices for an extended period. Earlier, many influential and high-end devices would shut off inconsistently due to temperature rise.

As copper has better heat dissipation and can reduce heat quickly, the devices run stably. It protects the devices from sudden shutdowns due to the incapability of controlling the heat. What’s more, you can depend more on the circuit board and its integrated devices’ performance.

Also, it is helpful since the incapability to control the high heat is a common cause of the device’s failure and defects. As the heavy copper circuit boards use multiple layers of copper foiling, it will control the heat more efficiently. So you can use the devices for an extended period.

Improved mechanical strength:

High-end devices use heavy copper printed circuit boards because of their better mechanical strength. These copper circuit boards have excellent mechanical strength in the PTH holes and at the connector sites.

As the mechanical strength increases, the devices connected to the circuit boards will withstand more load. So, appliances and devices can have more load capacity with the triggered mechanical strength. It also stops the quick deformation of the connectors and PTH holes to ensure extended longevity. So, circuit boards will have better consistency and durability.

Reduces the product size considerably:

The use of heavy copper PCBs has enabled the manufacturers to reduce the device sizes superbly. So, different industries have been relentlessly improving product performance with compact sizes. As the size of home appliances has reduced significantly, it has become easier for people to use them with easier accessibility.

The size reduction of the products made with heavy printed circuit boards has improved their real-life performance. The compactness also helps in easy maintenance.

Where to Use Heavy Copper PCB?

Heavy copper printed circuit boards have multiple applications in various industries. So, you will see its uses in medical equipment, military device, power system, and whatnot! In fact, most modern-day home appliances and industrial devices have large applications of heavy copper PCBs. As a result, heavy copper printed circuit board manufacturers need help to keep pace with the ever-increasing demand. Thankfully, FX has streamlined the production process, which has helped it meet the supply and demand adequately.

However, before considering the benefits of FX PCB-made heavy copper circuit boards, let’s see its uses in different sectors.

  • You will see the maximum use of heavy copper PCBs in power modules. It is used expansively in the electrical and power industries for greater heat sink and voltage-carrying capacity.
  • The next bis use of these PCBs is seen in automotive industries. With the expansion of electric cars, different modules and parts of the cars are made using heavy copper printed circuit boards.
  • You will also see its applications in military equipment. It includes radar, military weapon controls, and monitoring and surveillance systems.
  • The welding industry also uses heavy copper printed circuit boards. Different welding tools have thicker PCBs made with copper for excellent heat sink capacity.
  • A few other uses of heavy copper PCBs are torque control, UPS systems, power lines, and rail traction systems. It is also used in nuclear power and solar industries.

As you see, heavy copper PCBs have excellent uses in all modern industries. So, why do people choose them over standard copper PCBs?

Difference Between Heavy Copper And Standard Copper PCBs:

The main difference between heavy and standard copper PCBs is their copper uses. Regular copper circuit boards will use only 1oz of copper. On the contrary, heavy copper circuit boards have 3oz of copper.

This 3X more use of copper enabled the heavier PCBs to perform heavy-duty applications. It can carry more electricity with better heat sink and consistency than regular PCBs. So, you will see its uses in harsh conditions where maximum power output and consistency are required.

There’s also a difference in the PCB fabrication process. Usually, regular copper PCBs have etching and single-plating fabrication. Conversely, heavy copper PCBs have multiple-step platting and etching during fabrication. You will see their uses in high-end devices with multi-layered construction.

Heavy Copper Printed Circuit Boards Manufacturer: FX PCB

FX PCB is one of the best engineering and fabrication plants for heavy copper circuit boards. We have streamlined our manufacturing process to deliver you a bulk amount of heavy copper PCBs within the quickest possible time.

Our expert engineers and skilled workers work relentlessly to build high-end PCBs. We are even capable of making 6oz of thick copper boards. Our research and development (R&D) helped us to stay ahead of the competition in making thicker and thicker copper circuit boards. So, our PCBs made with heavier copper can carry larger voltage and electricity.

Whether you want to make smartphones, cameras, military devices, medical equipment, power modules, or sensors for automobile industries, our circuit boards will cover your necessity. Moreover, our streamlined PCB fabrication helps us deliver these heavy copper PCBs at an affordable price. If you are starting your business freshly or looking for reasonably priced printed circuit boards for more extensive uses, FX PCB-made circuit boards will meet your demands.

Besides our heavy copper circuit boards, we make metal, copper coin, ceramic, thick copper, and other types of PCBs. So, you will get a complete setup of the printed circuit boards from us to manufacture most futuristic devices, home appliances, and industrial tools.


Heavy copper printed circuit board manufacturers are committed to revolutionizing various industries. From mobile phones to aerospace and from military weapons to satellites, these heavy copper boards are used in broader sectors now. As an experienced printed circuit board manufacturer, we ensure maximum performance from our PCBs.

Contact us if you need faster delivery of the bulk of heavy copper PCBs. We will ensure you get high-quality, performance-centric, and extraordinary printed circuit boards. Your business will fly with these superior printed circuit boards made using heavy coppers.