Planar capacitance and resistanceSimple geometry helps you check scale; it does not replace a qualified component.Planar capacitance and resistanceSimple geometry helps you check scale; it does not replace a qualified component.Overlapping conductor area ADielectric separation dC ≈ ε0 × Dk × A / dIdeal plates onlyInclude fringing and lead inductancein the final circuit model.For a patterned resistor: R ≈ sheet resistance × length / width.Both models omit terminals, field crowding, frequency dependence and power limits.³Ô¹Ïtv engineering illustration · Conceptual, not a released drawing or measured result