Feldanalyse eines kreisförmigen dünnen Filmbzw. Folienwiderstandes

The potential, current flux and dissipation density distributions in a circular thin film/foil resistor are calculated based on a conformal mapping. The results indicate that the dissipation density at the corner of the contact between the lead and the resistor film/foil reaches infinity. This results in burning down or melting that part of the resistor. Finally, a reasonable contact shape between the lead and the resistor is suggested.