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Heavy Copper PCB Manufacturing
By plating or laminating copper to 4–20 oz (140–700 µm), we deliver current-carrying capability of 100–300 A per trace, thermal resistance ≤ 0.15 °C/W, and excellent shock resistance—ideal for high-current, high-power applications.
- Impedance control: ±15%
- Maximum number of layers: 1L
- Max panel size: 630×1500 mm
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Our Heavy Copper PCB Capabilities
Heavy Copper PCBs are widely used in EV battery-management systems, PV inverters, industrial power supplies, and high-power LEDs. Zintilon provides advanced heavy-copper fabrication from prototyping to small-batch production. From material cutting to final packaging, we offer efficient, reliable manufacturing solutions.
Heavy Copper PCB Materials
| Category | Typical Grade / Build-up | Key Performance | Copper-Weight Range | Remarks |
| Copper foil | RTF, RA, ED (Ra ≤ 3 µm) | 58 MS/m conductivity, thermal shock resistant | 3–40 oz | Thick-copper favourite, less under-cut |
| Resin system | High-Tg FR-4 (Tg 170 °C) | Tg 170–180 °C, low ΔT warpage | ≤12 oz | Low-cost automotive & power mainstream |
| Polyimide (PI) | Tg ≥ 250 °C, flexible, 300 °C solderable | 3–10 oz | Thick-copper FPC, mil & aerospace | |
| Epoxy + filler (EM827, EXB-HT) | 70 % filler, CTE 11 ppm, 150 °C rated | 6–20 oz | Flow-blocking, replaces FR-4 | |
| Reinforcement | Standard E-glass 2116/7628 | Low cost, CTE 16 ppm | ≤10 oz | Conventional thick-copper boards |
| Low-CTE aramid non-woven | CTE 6 ppm, density 1.3 g/cm³ | ≤6 oz | Dimensionally stable, high moisture | |
| Carbon-fiber / carbon-composite | In-plane λ 30–325 W/m·K, CTE –1.5–4 ppm | ≥10 oz | Stiff + heat-spreader, non-etchable | |
| Metal core / base | Aluminum IMS (5052/6061) | λ 1–2 W/m·K, light | 3–6 oz | LED, small DC-DC |
| Copper base (C1100) | λ 390 W/m·K, CTE 17 ppm | 6–30 oz | EV, power modules | |
| Cu-Mo-Cu (CMC) laminate | λ 150–220 W/m·K, CTE 5.6–7 ppm | 10–40 oz | High-reliability aerospace power | |
| Ceramic DBC (Al₂O₃/AlN) | λ 24–170 W/m·K, CTE 4.5–7 ppm | 6–28 oz | Vacuum, 350 °C operation | |
| Plug / fill resin | High-thermal epoxy plug (3 W/m·K) | CTE 18 ppm, 150 °C rated | Inner ≥4 oz | Replaces PP powder, smoother surface |
| Copper-paste plug | 3×10⁻⁵ Ω·cm, λ 20 W/m·K | Blind/buried | Conductive + thermal, high cost |
Heavy Copper PCB Capabilities
| Process Parameter | Sample | Batch |
|---|---|---|
| Layers | 50L | 40L |
| Finished Board Thickness | 0.2-18.0 mm | 0.3-10.0 mm |
| Board Thickness Tolerance | ±8% | ±8% |
| Min Line Width/Spacing | 1.5 mil/1.5 mil | 2 mil/2 mil |
| Min Hole-to-Line Spacing | 5 mil | 5 mil |
| Max Processing Size | 1200 mm*600 mm | 570 mm*760 mm |
| Min Finished Size | 5 mm*5 mm | 50 mm*50 mm |
| Copper Thickness | 1/3 oz-12 oz | 1/3 oz-8 oz |
| Layer-to-Layer Alignment Accuracy | 0.8 mil | 1 mil |
| Min Through-Hole Diameter | 0.075 mm | 0.1 mm |
| Min Blind-Hole Diameter | 0.05 mm | 0.075 mm |
| Max Aspect Ratio | 35:1 | 30:1 |
| Etching Tolerance | ±10%/±0.8 mil | ±10%/±1 mil |
| Min Solder Mask Bridge | 2 mil | 3 mil |
| Impedance Control Tolerance | ±5% | ±7% |
| HDI Order | 8th order | 5th order |
| Surface Finishing Process | ENIG, E-Gold, HASL, Ni-Pd-Au, Thick E-Gold, ImSn, ImAg, OSP, etc. | ENIG, E-Gold, HASP, Ni-Pd-Au |
Why Choose Our
Heavy Copper PCB Services?
One-on-One Quotation
Simply upload your .gbr file to receive a quotation feedback within 24 hours. Our professional engineers will analyze your design to avoid misunderstandings, actively communicate with you, and provide a reasonable price.
High-Quality Production
We maintain a rigorous and responsible attitude toward materials, processes, surface treatments, A.O.I, and flying probe testing, ensuring consistent high quality from prototype manufacturing to mass production.
Fast Delivery
Equipped with advanced machinery and a professional engineering team to ensure fast delivery. We prioritize orders based on requirements and complexity. Customized delivery solution is also available to tailored to your needs.
Instant Communication
For your benefit, we provide full-cycle technical support for each customer from quotation to delivery. We will respond quickly to any questions until you confirm satisfactory heavy copper PCBs.
Heavy Copper PCB Standards
Zintilon ensures quality through our Rigid PCB design standards. We are committed to precise measurement, delivering consistently high-quality results to our customers by follow up IPC standards (IPC-2221A, IPC-6012D, IPC-7351) to ensure manufacturability and reliability.
Industry
Copper-Weight Range
Key Advantages
Automotive electronics
Recommended 4–12 oz
Basis 300 A load, –55~125 °C full temp
PV / energy storage
Recommended 6–20 oz
Basis ΔTj ↓20 °C, efficiency ↑1.5 %
5G / computing
Recommended 4–8 oz
Basis 12 V bus 150 A, back-drill stub ≤0.05 m
Aerospace & defense
Recommended 6–20 oz
Basis Class 3 qual, radiation tolerant
Heavy Copper PCB Guidelines
Zintilon ensures quality through our Rigid PCB design standards. We are committed to precise measurement, delivering consistently high-quality results to our customers by follow up IPC standards (IPC-2221A, IPC-6012D, IPC-7351) to ensure manufacturability and reliability.
Parameter
Recommended
Basis
Min trace width
Recommended ≥0.3 mm (3 oz)
Basis Current + etch capability
Min spacing
Recommended ≥0.25 mm (3 oz)
Basis Prevents under-etch sliver
Mounting-hole ring
Recommended ≥0.4 mm
Basis Anti-tear
Power-device gap
Recommended ≥5 mm
Basis Thermal isolation
Board-edge copper
Recommended ≥3 mm (special 1.5 mm)
Basis Prevents burr short
Our Custom Heavy Copper PCB for Various Industrial Applications
Prototyping and production PCBs from Zintilon have been applied to the various walks of life. The brilliant heavy copper PCBs manufacturing simplifies the process of obtaining good-quality production PCBs.
Heavy Copper PCB FAQs
Project lead time and cost depend on its complexity. Zintilon will spare no effort to provide the most competitive prices and the fastest delivery time.
We understand that clients may need to make some adjustments after receiving the sample. Minor modifications can be done free of charge. However, if the modifications are substantial, we will need to reassess the price and delivery time.
We accept T/T and PayPal payments.
Got any more questions?
Ultimate Guide
to Heavy Copper PCB
to Heavy Copper PCB
Heavy Copper PCB Manufacturing
Various and Robust Heavy Copper PCB Services
Prototype
Prototyping
From Gerber files to circuit boards, our professional engineering team provides you with the highest quality heavy copper PCB manufacturing services. We meticulously control every detail of the process, including drilling, electroplating, and AOI, ensuring precise control over trace spacing, thickness, and panel dimensions. We are committed to providing you with the most reliable heavy copper PCBs.
- Complete production line
- Professional engineering support
- 10+ years‘ manufacturing experience
Production
Production
We have our own production lines and a robust manufacturing network. From heavy copper PCB design, engineering, and manufacturing, we have sufficient capacity to provide you with professional and fast delivery services, whether for small or large batches. We spare no effort in providing consistent mass production services for your products.
- Strong supply chain team
- Competitive pricing
- One-stop service from design to delivery
Let’s Build Something Great, Together
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