Analysis of Current Distribution in Magnetic Film Inductors

We have extended our electromagnetic model for high-frequency magnetic film inductors to account for driving current redistribution in structures where the conductor and the magnetic film are in direct electrical contact. We consider a stripe conductor of rectangular cross-section enclosed in a magnetic film. A potential difference of fixed amplitude is applied to both the conductor and the magnetic film. Maxell's equations for this geometry are solved analytically, and a simple expression for the impedance is obtained. The inductance at low frequencies (Q10 at ~1 GHz. Magnetic film inductors without insulation layers are simple in fabrication and promise large technological advantages.