On-package magnetic materials for embedded inductor applications

Li, L.; Lee, Dok Won; Hwang, Kyung Hoon; Min, Yo‐Sep; Wang, Shan X.

doi:10.1109/icept.2009.5270707

Cited by 5 publications

(4 citation statements)

References 12 publications

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“…We used the published data for CoFeHfO, which had a high permeability (~150) and electrical resistivity (~1600 μcm) [8,9]. Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Fig. 4 shows the frequency dependence of the complex permeability of CoFeHfO thin film patterned on a PCB by wet-etching [9]. Fig.…”

Section: Resultsmentioning

confidence: 99%

“…2. The magnetic film used in the model is the soft magnetic material CoFeHfO patterned by wet-etching [9]. In order to utilize the ferromagnetic resonance effect, the easy axis of the CoFeHfO film is along the signal line.…”

Section: Simulation Modelsmentioning

confidence: 99%

“…CoFeHfO has a high permeability (~150) and electrical resistivity (~1600 μcm) [8], which are good for high-frequency noise absorption. In our simulation, the measured permeability spectra of CoFeHfO film on a PCB were used, which made the modeling realistic and the results reliable [9]. Furthermore, we investigated the effects of the electrical resistivity of magnetic thin film on noise suppression, and the noise suppression can be increased 2~3 times with the optimal electrical resistivity.…”

Section: Introductionmentioning

confidence: 99%

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Numerical simulation on the noise suppression effect of nanogranular magnetic film CoFeHfO on PCB transmission lines

Wang

2010

2010 11th International Conference on Electronic Packaging Technology &Amp; High Density Packaging

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The noise suppression effects of nanogranular magnetic film CoFeHfO on the transmission lines on a printed circuit board were investigated by finite element modeling. Two kinds of transmission lines with CoFeHfO thin film, microstrip line (MSL) and coplanar waveguide (CPW), were simulated in the frequency range of 0.1-10 GHz by HFSS TM and their power absorption and S parameters were analyzed. The numerical simulation showed that soft magnetic film CoFeHfO with a high magnetic permeability and electrical resistivity could greatly reduce the noise of the transmission lines. With the magnetic film, the S 21 quickly dropped ~10 dB and the power absorption reached ~0.6 at 10 GHz. In order to further enhance the noise suppression, the electrical resistivity of the magnetic thin film was varied from 16 to  μΩ·cm in the simulation, and the strongest noise suppression was obtained at an electrical resistivity of ~1.6×10 5 μΩ·cm, which indicated that an optimal electrical resistivity was needed for magnetic material. In addition, the noise suppression mechanism was studied by the analysis of the electric field distribution near the transmission line.

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“…We used the published data for CoFeHfO, which had a high permeability (~150) and electrical resistivity (~1600 μcm) [8,9]. Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Fig. 4 shows the frequency dependence of the complex permeability of CoFeHfO thin film patterned on a PCB by wet-etching [9]. Fig.…”

Section: Resultsmentioning

confidence: 99%

Section: Simulation Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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