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Heavy Copper PCB

heavy copper pcb

What is Heavy Copper PCB

Heavy copper printed circuit boards are in high demand and are widely used in various electronic industries. The PCBs have become one of the hottest PCBs with a good development prospect in the PCB industry.

Heavy copper PCB has another name, thick copper PCB, containing more than 3 ounces (oz) of copper on the inner or out layers of printed circuit boards. The circuit board with a copper thickness from 4 oz/ft2 to 20 oz/ft2 is also considered heavy copper PCB, while copper weights above 20 oz/ft2 and up to 200 oz/ft2 are referred to as extreme copper. With an appropriate substrate and thicker plating in the through-hole circuit, the copper weight makes these PCBs a reliable wiring platform. These boards are manufactured through a variety of etching and plating techniques. The goal is always to add copper thickness via plated holes and sidewalls.

Heavy Copper PCB Manufacturing Capabilities

Victory PCB is a professional pcb manufacturer that can produce high-quality thick copper PCB products. Check our PCB manufacturing capabilities in the following table:
CircuitBase Copper Thickness (OZ)1/3 OZH OZ1 OZ1.5-2 OZ3 OZ4 OZ5 OZ6 OZ
Inner LayerMinimum Trace Width   (mm)/0.100.1250.200.250.300.350.40
Minimum Trace Spacing (mm)/0.100.1250.150.250.300.350.40
Outer   LayerMinimum Trace Width   (mm)0.0750.100.1250.200.250.300.350.40
Minimum Trace Spacing (mm)0.0750.100.1250.150.250.300.350.40
Solder MaskMinimum Solder Mask Opening(single side)(mm)
Minimum Solder Mask Bridge (mm)0.0750.

Benefits of Heavy Copper PCB

Compared to conventional printed circuit boards, a PCB with heavy copper traces and/or planes offers several advantages.

A Simple & Strong Structure

When integrated into the PCB, high current circuits allow designers to achieve higher density and reduce the layer count. This also keeps the structure of the PCB relatively strong but uncomplicated.

Reduces Failure State

Complex printed circuit boards with high current requirements generate more heat. Copper has high heat-conducting abilities and helps to conduct heat away from vital temperature sensitive components.

Lower Production Costs

Although copper is expensive, rather than use copper cables, using PCBs with heavy copper results in an overall lowering of production costs.


Heavy Copper PCBs are generally used for high power distribution, heat dissipation, planar transformers, and power converters. Besides, the following are other applications that use heavy copper PCBs:

  • Power supplies for Radar Systems

  • power converters

  • Safety and Signal Systems

  • Welding equipment

  • Protection Relays

  • Power Line Monitors

  • Torque Controls

  • Overload Relays

  • Automotive industry

  • Solar panel manufacturers

  • Nuclear Power Applications


  • 1. What is Heavy Copper PCB?

    A heavy copper PCB is a type of printed circuit board that has thicker copper traces and planes than a standard PCB. Generally, heavy copper PCBs are defined as those with copper traces or planes that are 3 ounces (oz) or greater in thickness, although some PCB manufacturers may define heavy copper as being anything over 2 oz.

  • 2. What are the main applications of heavy copper PCBs?

    Heavy copper is widely used in printed circuit boards with high energy (or high current), such as power electronic devices and power supply systems.

  • 3. How much more expensive is a heavy copper PCB compared to a regular PCB?

    The three factors that most impact PCB manufacturing cost breakdown are the type of material, the size of the board and the number of layers.

  • 4. What materials can be used for heavy copper PCB?

    Heavy-copper PCBs can be in any substrate material. Substrate material range from ordinary fr-4 material with operational temperatures of 130 to advanced materials with very high glass transition temperatures(Tg).

  • 5. What are some design considerations for heavy copper PCB?

    Design considerations for thick-copper boards are Copper thickness and width, Current carrying capacity, Substrate material and Coefficient of thermal expansion (CTE).

  • 6. Do you offer multi-layer heavy copper PCBs?

    Yes, no matter what the number of layers or complexity, we can provide heavy copper circuit boards based on your requirements.

  • 7. What about turnaround times for the heavy copper PCBs?

    We pride ourselves on offering quick turnaround times. Get in touch with us with your bespoke requirements and you will get quick turn PCBs.

  • 8. What are the manufacturing processes for heavy copper PCBs?

    Heavy copper PCBs are produced via etching and plating methods. The major aim in the production of this PCB is to add copper thickness through sidewalls and plated-through holes.

  • 9. Why is the use of heavy copper PCBs on the rise?

    Among the many advantages that heavy copper PCBs offer, is the fact that they are known for their strong mechanical power. The extra copper thickness allows the board to conduct more current. They, therefore, find wide application in industries where high-power transmission is the need of the hour.

Get custom heavy copper printed circuit boards that authenticates your business products and makes it an element for quick turnaround at a first go! At VictoryPCB, we work with each customer to ensure they get the boards they need, the way they need them. Contact us today for a quote for your specifications.


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