Abstract
This paper discusses near field, conduction and crosstalk noise suppression of magnetic films with uniaxial anisotropy on transmission lines for a film-type noise suppressor in the GHz frequency range. The electromagnetic noise suppressions of magnetic films with different permeability and resistivity were measured and simulated with simple microstrip lines. The experimental and simulated results of Co-Zr-Nb and CoPd-CaF2 films agreed with each other. The results indicate that the higher permeability leads to a better near field shielding, and in the frequency range of 2–7 GHz, a higher conduction noise suppression. It also suggests that the higher resistivity results in a better crosstalk suppression in the frequency range below 2 GHz. These results can support the design guidelines of the magnetic film-type noise suppressor used in the next generation IC chip.
Highlights
Integrated circuit (IC) technology is moving towards a higher performance duo to the improvement of data processing speed, the rise of operating frequency and the increase of integrated circuit density
Inductive coupling generated by magnetic flux, resistive and capacitive coupling generated by conduction and displacement currents are seriously affecting the electromagnetic compatibility of IC chip.[1,2]
The magnetic films with high permeability and soft magnetic properties are recently proposed with a function of noise suppression in the generation IC chips without increasing any footprints.[5,6,7,8]
Summary
Integrated circuit (IC) technology is moving towards a higher performance duo to the improvement of data processing speed, the rise of operating frequency and the increase of integrated circuit density. The near field electromagnetic radiation should be carefully considered in the 3D IC chip package design. The countermeasures of such electromagnetic interference are known as the circuit design, the layout design and the physical process technology.[3,4] Among them, the magnetic films with high permeability and soft magnetic properties are recently proposed with a function of noise suppression in the generation IC chips without increasing any footprints.[5,6,7,8] Ferromagnetic resonance, eddy current and high permeance of these magnetic films are one of the dominant factors of noise suppression and are discussed in Refs. The effects of the permeability and resistivity on the crosstalk is studied numerically
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