Multilayer 2OZ Copper Base PCB Manufacturer | High Thermal Conductivity Thermoelectric Separation Board

Multilayer 2OZ Copper Base PCB Manufacturer | High Thermal Conductivity Thermoelectric Separation Board

Copper base PCBs (copper core printed circuit boards) are high-performance thermal management PCB solutions designed for high-power, high-heat electronic applications. As a professional copper substrate manufacturer, we supply multilayer 2OZ thick copper base PCBs with thermoelectric separation structure, delivering excellent heat dissipation, high current carrying capacity and reliable electrical insulation performance for high-power LED, power supply and industrial control products.

Core Product Specifications

Board Thickness: 1.0mm

Dielectric Withstand Voltage: AC 2000V

Production Process: Thermoelectric separation structure

Copper Foil Thickness: Standard 2OZ, with support for up to 4OZ thick copper for custom thermoelectric separation designs

Thermal Conductivity: 2.0 W/m·K

Solder Mask: White solder mask, with custom color options available

Surface Finish: ENIG (Electroless Nickel Immersion Gold / immersion gold)

Quality Testing: 100% computerized open/short E-test

Lead Time: 3–5 working days for prototypes, 5–7 working days for batch production

Certifications: UL File No. E354470, ISO system certified, SGS material verified

Copper Substrate Structure & Core Performance Advantages

Copper base PCBs adopt a three-layer stacked structure, with each layer optimized for targeted performance:

1. Copper Circuit Layer

The top circuit layer requires high current carrying capacity, so thick copper foil ranging from 35μm to 280μm (1OZ to 8OZ) is used. Our standard 2OZ copper base PCB supports stable high-current transmission, and the thermoelectric separation structure can support up to 4OZ thick copper for higher-power scenarios.

2. Thermally Conductive Dielectric Layer

The thermal conductive insulating layer is the core technology of copper substrates. It is made of epoxy polymer filled with alumina and silicon powder thermal conductive fillers, featuring ultra-low thermal resistance of 0.15, excellent viscoelasticity, strong thermal aging resistance and reliable ability to withstand mechanical and thermal stress. It provides stable electrical insulation while efficiently transferring heat from the circuit layer to the metal base.

3. Copper Metal Base Layer

The copper metal base serves as the structural support and main heat dissipation layer of the board. Compared with aluminum substrates, pure copper base provides significantly better thermal conductivity for high heat flux scenarios. The copper base is fully compatible with conventional PCB machining processes including drilling, punching and cutting, enabling flexible custom shaping.

Available Surface Finish Options

We provide multiple surface finish options for copper base PCBs to match different assembly and application requirements:

Gold-plated copper substrate: for high-reliability contact and corrosion resistance scenarios

Silver-plated copper substrate: for RF and high-conductivity connection applications

Tin-plated copper substrate: for conventional SMT assembly with good solderability

Anti-oxidation (OSP) copper substrate: for low-cost short-cycle production with basic copper protection

Manufacturing Capability & Quality Assurance

All copper base PCBs undergo 100% computerized electrical testing before shipment to eliminate open circuit and short circuit defects. Our production lines are fully certified with UL E354470, ISO system certification and SGS material verification, ensuring stable compliance with global industry quality standards.

With dedicated prototype and small-batch production lines, we support fast turnaround: standard prototype orders can be delivered in 3–5 working days, and medium batch orders can be completed in 5–7 working days to meet customers’ fast R&D and production schedules.

Typical Applications

2OZ multilayer copper base PCBs are widely used in high-power LED lighting, power supply modules, motor drives, automotive electronics, industrial control equipment and other products with high heat dissipation and high current carrying requirements. The thermoelectric separation structure is especially suitable for high-power chip packaging scenarios requiring independent heat conduction paths.

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