DQS Electronic Co., Limited
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| MOQ: | 1 |
| Price: | Send us Gerber file for free quotation |
| Payment Terms: | T/T |
A Heavy Copper PCB is a printed circuit board that contains copper conductors 3 oz/ft² (≈ 105 µm) or thicker on any layer; the term is usually reserved for boards with ≥ 4 oz (≈ 140 µm) and can go up to 20 oz (≈ 700 µm) or more. The thick copper carries high continuous currents (tens to thousands of amps), provides low resistance and excellent thermal conductivity, and acts as an integral heat-sink. These boards are built by laminating thick copper foils or electro-plating to raise copper weight, then deep-etching to form traces and pads. Typical applications include power converters, motor drives, welding equipment, solar inverters, automotive battery-management systems, and military/aerospace power supplies.
| Item | Standard | Advance |
|---|---|---|
| Layers | 1-2 layers | 4-6 layers |
| Max Panel Size | 400*800mm | 600*1200mm |
| Min Panel Size | 5*5mm | 5*5mm |
| Board Thickness | 0.6mm-4.0mm | 4.0mm-7.0mm |
| Min. Line Width/Space | 3mil/3mil | 2mil/2mil |
| Min. Hole Size | 0.1mm | 0.075mm |
| Copper Thickness | 0.5-4oz | 15oz |
| Tolerance | Line Width: ±10% | Line Width: ±5% |
| PTH Hole Size | ±0.075mm | ±0.05mm |
| NPTH Hole Size | ±0.05mm | ±0.025mm |
| Hole Position | ±0.05mm | ±0.025mm |
| Outline | ±0.1mm | ±0.075mm |
| Board Thickness | ±10% | ±5% |
| Thermal Conductivity | 1W/mk, 2W/mk, 3w/mk | 5W/mk, 8W/mk |
| Impedance Control | ±10% | ±8% |
| Bow and Twist | 0.75% | 0.50% |
| Board Material | Al Base, Cu Base, Fe Base, Ceramic Base | |
| Surface Finish | HAL(with Pb free), Plated Ni/Au, ENIG, Immersion Tin, Immersion Ag OSP etc. | |
| Solder Mask | Yellow, Red, White, Black, Blue, Green, Grey, etc. | |
| Legend Color | White, Black, Yellow Grey, Sliver Grey, etc. | |
| Certification | UL, IATF16949, ISO, RoHs & Reach | |
