Analytical Calculation for Estimation of Magnetic Film Properties for a 3-GHz Thin Film Inductor

Tanaka, T.; Hong, Yang‐Ki; Gee, S. H.; Park, Mun-Hyoun; Erickson, D. W.; Byun, C.

doi:10.1109/tmag.2004.832251

Cited by 5 publications

References 8 publications

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Estimation of high-frequency loss properties through analytical calculation for semiconducting soft magnetic films in a near-field electromagnetic wave

Kim

Lee

2009

Journal of Applied Physics

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Gigahertz frequency characteristics were appraised by theoretical calculation based on a modified Landau–Lifshitz–Gilbert equation in order to examine the effect of electromagnetic induction and artificially controlled shape anisotropy in micropatterned magnetic films. Electromagnetic loss behaviors and magnetic fields of semiconducting soft magnetic films on a coplanar transmission line were numerically analyzed using a finite-element based electromagnetic solver. The combined relative permeability due to the electromagnetic induction and demagnetizing effect showed to be highly dependent on electrical resistivity and film thickness. Higher resistivity films at the same thickness of 2 μm showed higher loss in power and lower reflection because of the reduced electromagnetic induction. Thinner magnetic films at the same resistivity of 100 μΩ cm exhibited lower reflection due to the reduced electromagnetic induction and maxima of the reflection shifted to higher frequencies because of demagnetization associated with the structure of magnetic flux path. A severe increment of the radiated electromagnetic noise with decreasing resistivity was caused by the reflection of the radiated noise from the surface of the low resistivity films on the coplanar line in gigahertz frequency bands. A slight increase in the radiation noise with increasing thickness at the same resistivity confirmed to be caused by the increased reflection.

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Estimation of high-frequency loss properties through analytical calculation for semiconducting soft magnetic films in a near-field electromagnetic wave

Kim

Lee

2009

Journal of Applied Physics

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High-Q magnetic inductors for high efficiency on-chip power conversion

Wang¹,

Doris²,

Shehata³

et al. 2016

2016 IEEE International Electron Devices Meeting (IEDM)

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BaCo2-xZnxFe24O41(0¢?¬§×¢?¬§2) ferrites processed by mechanical alloying for LTCC Processing

Gee

Hong

Sur

et al. 2006

INTERMAG 2006 - IEEE International Magnetics Conference

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IntroductionCo 2 Z-type planar hexa-ferrite (Ba 3 Co 2 Fe 24 O 41 ) is a good candidate for multilayer chip inductors (MLCIs), mini-antenna, and electromagnetic interface (EMI) devices in the GHz range because of its high initial permeability and resonance frequency that are higher than other types of hexa-ferrite [1] . The crystal structure of Z-type hexa-ferrite is a mixture of M type (BaFe 12 O 19 ) and Y-type (Ba 2 Co 2 Fe 12 O 22 ) hexa-ferrite. High energy is required to form a single phase Z-type hexa-ferrite due to its high activation energy. Low temperature co-fired ceramic (LTCC) processing of Z-type hexa-ferrite is an issue to address. In this paper, we report properties of Z-type hexa-ferrite (Ba 3 Co 2-

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Analytical Calculation for Estimation of Magnetic Film Properties for a 3-GHz Thin Film Inductor

Cited by 5 publications

References 8 publications

Estimation of high-frequency loss properties through analytical calculation for semiconducting soft magnetic films in a near-field electromagnetic wave

Estimation of high-frequency loss properties through analytical calculation for semiconducting soft magnetic films in a near-field electromagnetic wave

High-Q magnetic inductors for high efficiency on-chip power conversion

BaCo2-xZnxFe24O41(0¢?¬§×¢?¬§2) ferrites processed by mechanical alloying for LTCC Processing

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