Heavy Copper Circuit Boards
Superior Power, Durability, and Precision
Heavy Copper PCBs offer enhanced current capacity, superior thermal management, and unmatched durability. With Candor’s advanced panel plating technology and precision manufacturing, you get evenly plated, defect-free boards that deliver consistent, reliable performance.
Strength and Performance
Heavy copper circuit board features copper layers thicker than standard PCBs, with a standard starting at 3 oz. These layers enhance current capacity, heat dissipation, and durability, making heavy copper PCBs ideal for high-power applications and environments with mechanical or thermal stress.
Panel Plating
Candor’s panel plating ensures uniform copper distribution, superior tensile strength, reduced variation, and eco-friendly reliability for heavy copper PCBs.
Liquid Organic Photoresist
Our liquid photoresist process delivers precise copper distribution, fine lines, fewer defects, simplified, cost-effective, and eco-friendly PCB manufacturing.

Benefits of heavy copper pcbs
High Current Handling
Heavy Copper PCBs feature thicker copper layers that enable them to handle high currents without overheating. These layers ensure stable performance, even with currents exceeding 30 amps, maintaining the board's functionality.
Enhanced Thermal Management
Thicker copper layers in Heavy Copper PCBs improve heat dissipation, reducing the risk of thermal damage. This added thermal mass ensures proper performance and reliability by efficiently managing heat around critical components.
Durability in Harsh Conditions
Heavy Copper PCBs are built to withstand mechanical stress and thermal cycling. Their robust structure ensures long-lasting reliability and minimizes wear and tear, making them a dependable choice for demanding applications.
use case by industry
Applications of Heavy Copper Circuit Boards
Automotive and Rail Systems
From advanced automotive electronics to rail traction systems, heavy copper PCBs offer durability and performance under high current loads and mechanical stress, ensuring safety and longevity.
Military and Aerospace
Heavy copper PCBs excel in aerospace and military equipment, withstanding harsh environments, high temperatures, and vibrations. Their reliability is critical for safety and mission success.
Solar and Renewable Energy
Heavy copper PCBs are essential for solar power converters and renewable energy systems. Their enhanced current handling and heat dissipation ensure reliability and efficiency in energy-intensive applications.
Industrial and Energy Systems
Ideal for nuclear industries, UPS systems, and welding equipment, heavy copper PCBs provide superior thermal management and robustness for demanding industrial applications.
FAQ
What are the differences between a standard PCB and heavy copper PCB?
There are a few differences between Standard PCBs and Heavy Copper PCBs, such as:
- Heavy Copper PCBs have a standard thickness of 3 oz, while traditional PCBs have a thickness of 1 or 2 oz.
- Heavy Copper PCBs are used in power electronics over normal circuits.
- Heavy Copper PCBs have higher conductivity.
- Heavy Copper PCBs provide better heat distribution and thermal cycling.
- Heavy Copper PCBs have sturdier mechanical stability.
What are the weight and thickness of heavy copper PCB?
Copper thickness is measured in ounces, and factors of weight and thickness make Heavy Copper PCBs different from other types of printed circuit boards by making them ideal for electronic devices such as power supplies, aerospace devices, and automotive devices. Heavy Copper PCBs typically weigh about 3 oz or more.
What are the applications of heavy copper PCB?
There are many applications of Heavy Copper PCBs, including:
- Solar Power Converters
- Automotive Industries
- Military Equipment
- Protective Relays
- Rail Traction Systems
- Nuclear Industries
- UPS Systems
- Welding Equipment
- Safety and Signal Systems
- Aerospace Manufacturing
How is heavy copper PCB fabricated?
Heavy Copper PCB fabrication combines a thick plating of copper with the weight of an appropriate substrate. This is done via a through-hole circuit, making all Heavy Copper PCBs a reliable wiring platform. The boards are manufactured with plating and etching techniques—these techniques in PCBs are used to add copper thickness through sidewalls and plated holes. Perfect etching is achieved through several methods to ensure unwanted copper is removed from the circuit board.
Heavy Copper PCBs do require unique plating and etching methods to ensure there is extra copper thickness. The fabrication of Heavy Copper PCBs is incomplete by standard etching techniques and requires additional steps and resources compared to standard PCBs. Streamlined manufacturing processes such as PPG liquid photoresist cut out the many problems related to conventional manufacturing processes.
Contact us today to begin your custom Heavy Copper PCB project. Candor’s engineers are happy to build you a prototype specific to your needs.