100mil Thick Copper PCB Customized With Stepped Copper Thickness Design

♦ What is Thick copper PCB?

Thick copper PCB refers to a circuit board formed by bonding a layer of copper foil with a thickness of 2 ounces (oz, about 62.5 microns) or more to FR-4 or other substrates during the printed circuit board (PCB) manufacturing process.

♦ Features of Thick Copper PCB

• • ​​​​Large current carrying capacity: copper thickness ≥3oz, can pass 100A+ current, low temperature rise.

  • ​​Strong heat dissipation: high thermal conductivity, heat dissipation efficiency increased by 5 times+, temperature rise reduced by 10-15℃.

  • ​​High mechanical strength: bending resistance increased by 50%, high temperature vibration resistance, adaptable to harsh environments.

  • ​​Electrical stability: low impedance, low loss, low risk of delamination at high temperature.

  • ​​Flexible design: supports wide line width (≥100mil) and multi-layer thick copper stacking.

  • ​​Complex process: etching/drilling is difficult, yield rate is 85%-90%.

  • ​​High cost: material + processing premium is 30%-50%, and the unit price is high.

♦ Typical Application Scenarios of Thick Copper PCB

• • Power conversion equipment: photovoltaic inverters, electric vehicle OBCs and server power supplies use ≥4oz thick copper plates + heat dissipation design to control temperature rise <40℃.

  • Industrial control: PLC, inverters, etc. use double-layer 3oz thick copper plates + blind holes to achieve compact layout.

  • New energy field: energy storage busbars and fuel cell boards use ≥5oz thick copper + nickel plating (≥5μm) for corrosion protection.

♦ Technical Parameters

♦ One-Stop PCBs Solution

PCB Prototype	Felx PCB	Rigid-Flex PCB	Aluminium PCB
Heavy Copper PCB	HDI PCB	High Frequency PCB	High TG PCB

♦ Advantages of DQS Team

1. On-time Delivery:

• • Owned PCBA factories 15,000 ㎡
  • 13 fully automatic SMT lines
  • 4 DIP assembly lines

2. Quality Guaranteed:

• • IATF, ISO, IPC, UL standards
  • Online SPI, AOI, X-Ray Inspection
  • The qualified rate of products reach 99.9%

3. Premium Service:

• • 24H reply your inquiry；
  • Perfect after-sales service system；
  • From prototype to mass production

DQS Electronic is located in Shenzhen, focusing on PCB Layout Design, PCB Fabrication, Electronic Components Sourcing, SMT, PCB Assembly and Testing. We are a one-stop EMS electronic manufacturing company committed to providing global customers with rapid prototyping and mass production.

Our products include single, double, multi, high frequency, aluminum base, copper base, FR-4 and other high precision circuit boards.

We have over 10 years of experience in serving many domestic and foreign brand customers in a wide range of fields such as Medical, Automotive, Industrial Automation, Artificial Intelligence, Smart Home, Security, Power and Communications, etc..