Digital Electronics Equipment Heavy Copper PCB
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Digital Electronics Equipment Heavy Copper PCB

Heavy copper PCB is a special circuit board with thick copper foil layer, which is often used in applications with high current transmission, heat dissipation and high reliability requirements. The copper foil thickness of heavy copper PCB is usually between 3oz-20oz, which can provide better current carrying capacity and heat dissipation effect. It is suitable for high-load electronic equipment such as power amplifiers, electric vehicle controllers, and power supply systems. Heavy copper PCB has good electrical conductivity, heat resistance and reliability, which can meet the requirements of various high-performance applications.


Heavy Copper PCBs are a type of printed circuit board characterized by their thick copper layers. These boards are designed to carry higher current loads and provide superior thermal management compared to standard PCBs. The heavy copper layers are typically defined as copper thickness greater than 3 ounces per square foot (oz/ft²). Heavy Copper PCBs are commonly used in applications that require high power dissipation, such as power electronics, automotive electronics, industrial equipment, and renewable energy systems. They offer excellent reliability, low impedance, and improved resistance to thermal stress, making them a reliable choice for demanding applications.


Here are the advantages and features of Heavy Copper PCBS:

High Current Carrying Capacity: Heavy Copper PCB are designed with thick copper layers, enabling them to carry higher current loads compared to standard PCB. This makes them ideal for power electronics applications that require efficient power distribution.

Superior Thermal Management: The thick copper layers in Heavy Copper PCB provide excellent heat dissipation, allowing for efficient thermal management. This helps to prevent overheating and ensures reliable performance in high-power applications.

Enhanced Mechanical Strength: Heavy Copper PCB offer enhanced mechanical strength and durability due to their thicker copper layers. This makes them more resistant to thermal stress, vibrations, and mechanical impacts.

Low Impedance: The heavy copper layers reduce the resistance and impedance of the PCB, leading to improved electrical performance and signal integrity. This is particularly beneficial for high-speed and high-frequency applications.

Wide Range of Applications: Heavy Copper PCB find applications in various industries, including power electronics, automotive electronics, industrial equipment, and renewable energy systems. They are suitable for applications that require high power dissipation and robust performance.

Reliability and Longevity: Heavy Copper PCB offer enhanced reliability, extended lifespan, and reduced risk of failure. They are designed to withstand demanding environmental conditions and provide stable performance over the long term.

Parameter NameDescription
Copper Thickness3 oz/ft² (105 µm) to 20 oz/ft² (700 µm)
Board Thickness0.4 mm to 6.5 mm
Minimum Trace Width/Spacing4 mil (0.1 mm)
Minimum Hole Size0.15 mm
Surface FinishingHASL, ENIG, Immersion silver, OSP, etc.
Solder MaskGreen, Black, Blue, White, Red, Yellow, etc.
SilkscreenWhite, Black, Yellow, etc.
Maximum Panel Size600 mm x 700 mm
Maximum Operating Temperature130°C (may vary depending on the specific material and design)
ComplianceRoHS, UL certified, ISO certified

Here are the common applications of heavy copper boards:

Power electronics: Heavy copper boards are commonly used in power electronic systems. Their increased thickness allows for high current carrying capacity, reducing resistance and minimizing power losses. Heavy copper boards are used in applications such as power supplies, electric vehicle chargers, inverters, and motor controllers.

High-power LED lighting: Heavy copper boards are popular in high-power LED lighting applications. The thick copper traces help with efficient heat dissipation, ensuring the LEDs operate at optimal temperatures. This improves the overall lifespan and performance of the lighting system, making heavy copper boards ideal for outdoor and industrial lighting applications.

Automotive industry: Heavy copper boards find extensive use in the automotive industry due to their ability to handle high power and withstand harsh operating conditions. They are used in various systems such as power distribution units, engine control modules, battery management systems, and electric vehicle chargers.

Aerospace and defense: The aerospace and defense sectors require reliable and durable PCBs for their applications. Heavy copper boards are used in spacecraft, satellites, radar systems, and military equipment. Their robust design allows them to endure extreme temperatures, vibrations, and mechanical stresses.

Industrial equipment: Heavy copper boards are employed in various industrial equipment, including manufacturing machinery, robotics, HVAC systems, and renewable energy systems. These applications often involve high current flow or high-temperature environments, making heavy copper boards essential for reliable and efficient operation.

Renewable energy: Heavy copper boards are used in renewable energy applications such as solar inverters, wind power systems, and energy storage devices. Their high current capability and thermal conductivity make them suitable for handling power output and managing heat in these energy generation and storage devices.

In summary, heavy copper boards are widely used in applications requiring high current carrying capacity, efficient heat dissipation, and durability. From power electronics to aerospace, automotive to industrial equipment, and renewable energy systems, these specialized boards play a crucial role in ensuring reliable and high-performance operation across various industries.

Q: What is the advantage of using Heavy Copper PCB in power electronics applications?

A: Heavy Copper PCB offer higher current carrying capacity, allowing efficient power distribution and reduced resistance. They ensure reliable performance in power electronics applications with demanding power requirements.

Q: Can Heavy Copper PCB be used in high-temperature environments?

A: Yes, Heavy Copper PCB are designed to withstand elevated temperatures. They have good thermal conductivity and can effectively dissipate heat, making them suitable for high-temperature applications.

Q: Are Heavy Copper PCB compatible with standard PCB manufacturing processes?

A: Yes, Heavy Copper PCB can be manufactured using standard PCB fabrication processes. However, certain considerations, such as copper plating thickness and heat dissipation, need to be taken into account during production.

Q: Are Heavy Copper PCB more expensive than standard PCBs?

A: Yes, Heavy Copper PCB generally have a higher cost compared to standard PCBs due to the specialized manufacturing processes and thicker copper layers. However, their benefits in terms of high current capacity and improved thermal management often justify the investment.

Q: Can Heavy Copper PCB be used for high-frequency applications?

A: While Heavy Copper PCB are primarily designed for high current applications, they can also be used for high-frequency applications. However, the higher copper thickness may introduce impedance variations, requiring careful design considerations and impedance control measures


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