1. What is a Wirebond Inductance Calculator?

Definition: This calculator estimates the inductance of parallel wirebonds based on their physical dimensions.

Purpose: It helps electrical engineers and PCB designers calculate parasitic inductance in wirebond interconnects.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( L \) — Inductance (Henries)
• \( \mu_0 \) — Permeability of free space (4π × 10⁻⁷ H/m)
• \( l \) — Length of wirebond (meters)
• \( D \) — Distance between wires (meters)
• \( d \) — Wire diameter (meters)

Explanation: The formula calculates mutual inductance between two parallel conductors based on their geometry.

3. Importance of Wirebond Inductance Calculation

Details: Accurate inductance calculation is crucial for high-frequency circuit design, signal integrity analysis, and power distribution network design.

4. Using the Calculator

Tips: Enter the wire length, distance between wires, and wire diameter. All values must be > 0 and distance must be greater than diameter.

5. Frequently Asked Questions (FAQ)

Q1: What is the permeability of free space (μ₀)?
A: It's a physical constant equal to 4π × 10⁻⁷ H/m (henries per meter) that represents magnetic permeability in vacuum.

Q2: Why does distance between wires affect inductance?
A: Closer wires have stronger magnetic coupling, resulting in higher mutual inductance.

Q3: What's a typical wire diameter for wirebonds?
A: Common diameters range from 25μm (0.000025m) to 500μm (0.0005m) depending on application.

Q4: How does wire length affect inductance?
A: Inductance increases linearly with wire length - longer wires have higher inductance.

Q5: When is wirebond inductance most important?
A: In high-frequency applications (>100MHz) where parasitic inductance can significantly impact circuit performance.