EAGLE Help

Thermal


Thermal symbols connect through-holes in supply layers with the supply signal.

The dimensions of the symbol are calculated with the parameters "Isolate", "Conduct", and "Gap" along with the drill diameter:

Inner diameter = D + 2 * C
Outer diameter = Inner diameter + 2 * I
Gap = width of the conducting paths in
      the thermal symbol
      Default: 20 [Mil]
      (only relevant with emulation)
where: D = drill diameter
       C = Conduct (Default: 20 [Mil])
       I = Isolate (Default: 10 [Mil])
With the default settings thermal symbols with a conducting ring of 20 Mils width are generated. The isolation lines are 10 Mils wide and leave conducting paths of 20 Mils width.
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