论文信息 - Equivalent circuit analysis of an RF integrated ferromagnetic inductor

Equivalent circuit analysis of an RF integrated ferromagnetic inductor

An RF integrated air-core inductor and a ferromagnetic thin-film inductor having a ferromagnetic film on top of the spiral have been microfabricated. An equivalent circuit of the RF integrated spiral inductor with ferromagnetic film has been derived to analyze the contribution of the permeability of the magnetic film to the inductance of the inductor. The scattering parameters (S-parameters) have been measured to derive the equivalent circuit parameters of the inductors. Using the amorphous Co/sub 85/Nb/sub 12/Zr/sub 3/ film with slots, the inductance increased and the capacitance between the magnetic film and the coil and between the magnetic film and the ground could be neglected up to 5 GHz.

[1] Shan X. Wang,et al. High frequency (GHz) and low resistance integrated inductors using magnetic materials , 2001, Proceedings of the IEEE 2001 International Interconnect Technology Conference (Cat. No.01EX461).

[2] Masahiro Yamaguchi,et al. MICROFABRICATION AND CHARACTERISTICS OF MAGNETIC THIN-FILM INDUCTORS IN THE ULTRAHIGH FREQUENCY REGION , 1999 .

[3] Masahiro Yamaguchi,et al. Improved RF integrated magnetic thin-film inductors by means of micro slits and serface planalization techniques , 2000 .