I'm trying to realize a trace that is able to manage 15 A average with a temperature increase of 20°C. The trace is embedded in a thin substrate of polyimide.
Which is the minimum trace width? All the articles talk about external trace on FR4. All the graphs (IPC) show the behavior of the external trace.
Who can give me more information?
Try the UCADPCB calculator from UltraCAD. At least it does the calculation for internal layers, too. I find it pretty handy and easy to use. www.ultracad.com/calc.htm