When the tracks thicker than standard, which track widths shuld be used?

Normally, the copper base more thicker, the track should be more wider. One rule of thumb is that with a 18 µm copper base the track should not be narrower than 0.1 mm (4 mil) and with a 105 µm copper base the track should not be narrower than 0.25 mm (10 mil)

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