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Do you know How Thick Is 1oz Copper?How much copper does you PCB need when manufacturing?

Do you know How Thick Is 1oz Copper?How much copper does you PCB need when manufacturing?

Why use a unit of weight to specify a thickness in PCB manufacturing? the most common way to express copper thickness on a PCB is in ounces (oz). If 1oz (28.35 grams) of copper is flattened to evenly cover 1 square foot of surface area (0.093 square meter), the resulting thickness will be 1.37mils (0.0348mm). A conversion chart for different units of measure can be found below.

How much Copper do I need when PCB manufacturing?

By a wide margin, most PCBs are made with 1oz copper on each layer. If your files do not include a fab print or other specifications, we'll assume 1oz finished copper weight on all copper layers. If your design requires higher voltages, resistance, or impedances, thicker copper might be necessary. There are several online tools that can help you determine what thickness, width or length your traces need to be to achieve your target results. A few such 3rd party tools are linked below. PCB Prime is not affiliated with the authors of these tools.

https://www.eeweb.com/tools/microstrip-impedance

https://www.allaboutcircuits.com/tools/


TIP: Every copper layer is assumed to have the same finished copper weight unless otherwise specified in your fabrication notes. A 4-layer board with a defined weight of 1oz, is assumed to have a finished copper thickness of 1.37mils (or more) on every copper layer.


Know more:
What's the copper rules in PCB manufacturing?

 

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