# Can resistive traces be created on a PCB?

I'm assuming that copper traces on a PCB have negligible resistance. Is it possible to put a trace on a PCB that has some greater amount of resistance? The amount of resistance would not need to be precise per distance, but consistent along the length.

• It is occasionally done with copper tracks if you want a low value resistor. A meander pattern is often used. If you google "PCB trace resistor" you will find several articles and calculators together with many images of how it's done. – Peter Jennings Sep 14 '19 at 23:51
• If I remember correctly, standard 1oz copper foil has a sheet resistance of 0.288 miliOhm per square, at 25degC. There is a lot of variation over temperature, like around 50% initial value tolerance over commercial temperature range. Using thinner 0.5oz copper foil has about half the sheet resistance. Longer trace or narrower trace will have higher resistance (more squares). A trace that is 5 times as long as it is wide will have a resistance of about 0.001Ohm. – MarkU Sep 15 '19 at 0:03
• @MarkU Wouldn't half-ounce foil be twice the resistance of one-ounce? – Hearth Sep 15 '19 at 0:13
• "The amount of resistance would not need to be precise per distance, but consistent along the length." - why does it need to be 'consistent along the length', how long does it need to be, and what total resistance is required? – Bruce Abbott Sep 15 '19 at 0:31
• @Heath oops, you’re right: thinner foil, thinner trace width, and longer trace length all increase resistance. Good catch. – MarkU Sep 15 '19 at 0:49