China 4oz Heavy Copper PCB - Up to 6oz High Precision PCB

4oz Heavy Copper PCB

This 4oz heavy copper PCB is designed for electronic applications that require higher current carrying capacity and improved thermal performance compared with standard copper PCBs.

The board uses 4oz copper as the standard heavy copper configuration and supports copper thicknesses up to 6oz (210μm). It can be manufactured with 2 to 32 layers, making it suitable for both relatively simple power boards and more complex multilayer designs.

Heavy Copper for High-Current Circuits

The increased copper thickness provides lower electrical resistance and higher current carrying capability than standard 1oz or 2oz copper configurations.

Heavy copper can also provide additional thermal conduction within the PCB, which is useful for power circuits and areas with higher current or thermal loads.

The required copper thickness should be selected according to the operating current, trace dimensions, temperature rise and overall PCB design.

Up to 6oz Copper Capability

The standard configuration uses 4oz copper, with manufacturing capability up to 6oz copper.

The maximum copper thickness can be customized according to the layer structure and electrical requirements of the board.

A 6oz copper configuration is suitable for designs with particularly demanding current-carrying requirements, while 4oz copper provides a practical solution for many power electronics applications.

2 to 32 Layer PCB Construction

The PCB can be manufactured from 2 to 32 layers.

Multilayer construction provides additional space for power, ground and signal routing. It also allows high-current sections and control circuits to be arranged on separate layers according to the system design.

The final layer count depends on the circuit complexity, electrical requirements, mechanical dimensions and required impedance or power distribution structure.

FR-4 and High-TG FR-4 Materials

The PCB supports FR-4 and High-TG FR-4 base materials.

FR-4 provides a widely used solution for general electronic and industrial applications, while High-TG FR-4 can be selected for designs requiring improved thermal performance at elevated operating temperatures.

Material selection should be based on the operating temperature, assembly process and reliability requirements of the finished product.

High-Precision PCB Manufacturing

The heavy copper PCB supports a minimum line width and spacing of approximately 6mil/6mil on heavy copper layers, with a minimum hole size of approximately 0.30mm.

The actual achievable dimensions depend on copper thickness, layer structure and the specific board design.

Manufacturing inspection can include AOI, flying probe testing and electrical testing to verify board quality before shipment.

Surface Finish Options

Different surface finishes are available for different assembly and application requirements.

Available options include HASL, Lead-Free HASL, ENIG, OSP, Immersion Silver and Immersion Tin.

Solder mask colors can include green, black, blue, white and matte black.

Applications

High-Current Power Supplies and Converters

The 4oz heavy copper structure is suitable for power supplies, DC-DC converters, AC-DC converters and other power conversion equipment where high-current PCB traces are required.

EV Chargers and Charging Infrastructure

Heavy copper PCBs can be used in EV charging equipment and charging infrastructure for power distribution and high-current circuit sections.

Industrial Motor Drives and Servo Systems

The PCB can be integrated into motor drives, servo systems and industrial control equipment where power switching and motor control circuits generate significant current and heat.

Solar and Wind Power Equipment

Heavy copper multilayer PCBs are suitable for selected renewable energy equipment, including solar inverters and wind power electronic systems.

Battery Management Systems

The PCB can be used in battery management and energy storage equipment where high-current paths and reliable power distribution are required.

Welding and Heating Equipment

Welding machines, heating equipment and other high-power systems can use heavy copper PCB structures for high-current circuit sections.

Automotive Electronics

Heavy copper PCBs can be used in automotive power electronics and other vehicle systems requiring higher current carrying capability and thermal performance.

Telecom and Networking Equipment

The PCB can also be used in power supply, power distribution and other high-current sections of telecommunications and networking equipment.

Technical Specifications

PCB Quality and Testing

The manufacturing process follows IPC-A-600 and IPC-6012 requirements with Class 2 and Class 3 production available.

AOI, flying probe and electrical testing can be used to identify manufacturing defects and verify electrical performance.

DFM review can also be carried out before production to identify potential manufacturing issues related to the PCB layout, copper thickness, holes, spacing and board construction.

Heavy Copper PCB for Power Electronics

The 4oz heavy copper PCB combines increased copper thickness, multilayer construction and high-precision manufacturing for applications where current capacity and thermal performance are important.

With 4oz standard copper and up to 6oz capability, 2–32 layer construction and multiple material and surface finish options, the PCB can be configured for different power electronics, industrial and high-current applications.