Heavy Copper PCB Manufacturer
High Current, High Reliability PCBs by MultPCB
At MultPCB, we specialize in Heavy Copper PCBs—built to withstand high current, thermal cycling, and harsh operating conditions. Whether you’re designing power converters, automotive systems, or industrial control units, our thick copper boards deliver outstanding mechanical strength and reliability.
What Is a Heavy Copper PCB?
A Heavy Copper PCB (also known as thick copper PCB) is a printed circuit board that uses copper thicknesses greater than 3 oz/ft² (105μm). These boards are specifically designed for high power applications and are capable of handling large current loads while maintaining structural integrity and efficient heat dissipation.
Heavy Copper = High Durability + High Current + Long Life Span
Why Choose Heavy Copper PCBs?
High Current Capacity
Thicker copper layers safely carry large currents without overheating.Enhanced Heat Dissipation
Excellent for thermal management in power-heavy applications.Improved Mechanical Strength
Withstand thermal stress and physical load in demanding environments.Extended PCB Lifespan
Greater reliability under repeated power cycling and harsh use conditions.Compact High-Power Design
Reduce board size by integrating power and control circuits together.
MultPCB Heavy Copper PCB Capabilities
| Feature | Specification |
|---|---|
| Copper Thickness | 3 oz to 12 oz (customizable per layer) |
| Layer Count | 2 to 10 layers |
| Board Thickness | 1.2 mm to 5.0 mm |
| Board Size | Up to 500 mm × 600 mm |
| Min. Trace/Spacing | 10 mil / 10 mil (varies by copper thickness) |
| Min. Hole Size | 0.3 mm |
| Material Options | FR4, High Tg FR4, Polyimide, Hybrid materials |
| Surface Finishes | ENIG, HASL (lead-free), Immersion Silver, OSP |
| Drilling Types | Mechanical, laser, via-filling available |
| Testing Methods | AOI, X-ray, Flying Probe, Thermal Shock Test |
| Lead Time | Prototype: 5–10 days; Mass Production: 12–25 days |
Applications of Heavy Copper PCBs
MultPCB’s heavy copper boards are ideal for:
⚡ Power Supply Modules
(DC-DC converters, AC-DC converters, UPS systems)🚗 Automotive Electronics
(Battery management, electric vehicle chargers, motor control)🔌 Industrial Power Systems
(Power distribution units, inverters, relays)🧠 Military & Aerospace
(Rugged control systems, radar electronics)💊 Medical Equipment
(High-reliability power boards for diagnostics and imaging)☀️ Green Energy Systems
(Solar inverters, wind power converters, energy storage)
Why Choose Heavy Copper PCB from MultPCB?
✅ Heavy Copper Experts: 18+ years in thick copper board manufacturing.
✅ Robust Process Control: Special etching, plating, and lamination for high copper integrity.
✅ Design Assistance: Support for current-carrying calculations, thermal simulation, and DFM.
✅ Reliable Quality: Full traceability, electrical testing, and IPC class 2/3 compliance.
✅ Fast Delivery: Prototypes in 5–7 days, volume production with 2-3 weeks.
FAQs About Heavy Copper PCB
1. What is a heavy copper PCB?
MultPCB: A heavy copper PCB is a printed circuit board that contains copper thickness greater than 3 oz/ft² (approximately 105μm). These boards are specifically designed to carry high current, offer excellent thermal performance, and withstand harsh operating environments.
2. What copper thicknesses does MultPCB offer?
MultPCB: We manufacture PCBs with copper thicknesses ranging from 3 oz up to 20 oz per layer, depending on your design needs. Most common configurations include 3 oz, 4 oz, 6 oz, and 8 oz copper layers.
3. What are the applications of heavy copper PCBs?
MultPCB: Heavy copper PCBs are widely used in:
Power converters and inverters
EV charging stations and automotive control units
Solar energy systems and battery management
Industrial motor drivers and power distribution
Medical imaging equipment
Military-grade control boards
4. What materials are best for heavy copper PCB production?
MultPCB: We recommend High Tg FR4, Polyimide, or ceramic hybrid substrates for better thermal stability and durability. The material choice depends on your operating temperature and mechanical strength requirements.
5. Can MultPCB produce multi-layer heavy copper PCBs?
MultPCB: Absolutely. We manufacture up to 12-layer heavy copper PCBs, combining high current and high-density signal routing with thermal performance.
6. What are the main advantages of heavy copper PCBs?
MultPCB:
Carry higher current loads
Excellent thermal management
Increased mechanical strength
Longer life under thermal cycling
Ability to integrate power and control on one board
7. How do you ensure proper plating for thick copper layers?
MultPCB: We use advanced step plating and high-aspect-ratio plating technologies to ensure uniform copper distribution and strong via walls, even in 6–10 oz copper designs.
8. What is the minimum trace width for heavy copper PCBs?
MultPCB: Trace width depends on the copper thickness and current load. As a rule of thumb, for 3 oz copper, the minimum trace width is 10 mil. We assist in current-carrying trace width calculations during DFM review.
9. What’s the typical lead time for heavy copper PCBs?
MultPCB:
Prototypes: 5–10 working days
Volume production: 10–25 working days, depending on complexity
10. Does MultPCB offer impedance control on heavy copper boards?
MultPCB: Yes. We support controlled impedance designs, including hybrid stack-ups with both high-power and high-speed signal layers.
11. Can MultPCB help with thermal management solutions?
MultPCB: Yes. In addition to thick copper, we offer thermal vias, heatsink plates, and custom copper planes to optimize heat dissipation in your board layout.
12. How do I get a quote for a heavy copper PCB?
MultPCB: Just send your Gerber files, BOM, and copper thickness requirements to sales@multpcb.com. Our engineers will review your files and provide a detailed quote within 24 hours.
