**This post answers the question “What are capacitance and inductance of IC wires?”. Wiring loop (depicted below) makes the most common type of parasitic inductance.**

The inductance of the IC wire with parameters depicted on the figure can be calculated by formula $L={\mu}_{0}R\left(\mathrm{ln}\right(\frac{16R}{d})\u20132)$.

Let’s calculate capacitance and inductance of IC wires of different shapes. Let’s consider the combination of IC wiring depicted on the figure below. Here $W\gg G$ . Conductor is insulated with dielectric with permittivity $\epsilon >{\epsilon}_{0}$ and permeability ${\mu}_{0}$.

Then for the unit length of the wire, capacitance $C$ and inductance $L$ for flat conductor can be found as ${C}_{f}=\frac{\epsilon W}{G},{L}_{f}=\frac{{\mu}_{0G}}{W}$.

The unit length of wire capacitance $C$ and inductance $L$ for cylindrical conductor (depicted below) can be found as ${C}_{c}=\frac{2\pi \epsilon}{\mathrm{ln}({\displaystyle \frac{H}{R}}+\sqrt{{\displaystyle \frac{{H}^{2}}{{R}^{2}}}\u20131})}$ and ${L}_{c}=\frac{{\mu}_{0}}{2\pi}\mathrm{ln}(\frac{H}{R}+\sqrt{\frac{{H}^{2}}{{R}^{2}}\u20131})$.

In both cases $CL=\epsilon {\mu}_{0}$.

More educational content can be found at Reddit community **r/ElectronicsEasy.**