Copper Weight
Also known as: Copper Thickness, Copper Foil Weight
MaterialsDefinition
The thickness of the copper foil on a PCB, expressed in ounces per square foot (oz/ft²). Standard copper weight is 1 oz (35μm thick), with heavier options for high-current applications.
Extended Definition
Copper weight is a critical parameter in PCB design that directly affects current-carrying capacity, thermal performance, and impedance characteristics. The term originates from the weight of copper per square foot of board area.
Common Copper Weights
| Weight | Thickness | Typical Use |
|---|---|---|
| 0.5 oz | 17μm | Fine-pitch components, HDI |
| 1 oz | 35μm | Standard signal routing |
| 2 oz | 70μm | Power distribution, LED boards |
| 3-6 oz | 105-210μm | Heavy copper, automotive, power electronics |
Usage Examples
- "This power supply board requires 2 oz copper weight for the power planes."
- "Standard 1 oz copper weight is sufficient for most signal routing."