Bond Wire Inductance Calculator
Estimate the parasitic inductance of an isolated round bond wire as 0.2·l·(ln(4·l/d)-0.75) nH where l and d are length and diameter in mm. Assumes straight wire in free space and l >> d.
Description
Estimate the positive partial inductance of a straight isolated round bond wire from length and diameter.
Estimate the parasitic inductance of an isolated round bond wire as 0.2·l·(ln(4·l/d)-0.75) nH where l and d are length and diameter in mm. Assumes straight wire in free space and l >> d.
When to use Bond Wire Inductance Calculator
- Estimate the positive partial inductance of a straight isolated round bond wire from length and diameter.
- Compare fabrication or device scenarios while holding coefficients and unit conventions constant.
- Check a hand calculation before moving to a higher-fidelity process, circuit, or TCAD model.
How the calculation works
The logarithmic geometry term must remain positive; short, thick geometries are outside this slender-wire approximation.
L[nH] = 0.2·l[mm]·[ln(4l/d)−0.75] Interpreting the result
The logarithmic geometry term must remain positive; short, thick geometries are outside this slender-wire approximation.
Assumptions and limitations
- Return path, loop shape, nearby conductors, skin effect, mutual inductance, and package dielectric are not included.
- Use parameters measured for the same material, geometry, temperature, and operating regime whenever the result informs engineering work.