Device physicsMVP
Interconnect resistance
Resistance of a metal wire from its resistivity and geometry: R = ρL/(W·t).
Inputs
Result
Enter values and calculate to see the result.
Interpretation
Enter the wire resistivity, length, width, and thickness.
Formula
R = ρ · L / (W · t) = Rs · (L/W)
Rs = ρ/t is the sheet resistance.
Variables
| Symbol | Variable | Unit |
|---|---|---|
| R | Wire resistance | Ω |
| ρ | Resistivity | Ω·m |
| L, W, t | Length, width, thickness | m |
| Rs | Sheet resistance | Ω/□ |
Assumptions & validity
This tool assumes:
- Uniform rectangular wire; ignores temperature, barrier/liner layers, and via resistance.
Worked example
ρ = 2×10⁻⁸ Ω·m, L = 100 µm, W = 1 µm, t = 100 nm.
Rs = 0.2 Ω/□; squares = 100; R = 20 Ω