Magnetic-Multilayered Interconnects Featuring Skin Effect Suppression

Zhuang, Yan; Rejaei, B.; Schellevis, H.; Vroubel, M.; Burghartz, Joachim N.

doi:10.1109/led.2008.917630

Cited by 24 publications

(6 citation statements)

References 6 publications

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“…Possibly for the first time, complex permeability μ, as opposed to the more common complex permittivity ò, is used as a method of skin effect suppression. Relation to experiments [2] and Landau-Lifshitz-Gilbert damping are presented.…”

Section: Introductionmentioning

confidence: 88%

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Skin effect suppression for millimeter-wave frequencies through manipulation of permeability

Yamada

2023

Eng. Res. Express

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A new device strategy for suppressing unwanted skin effect in coplanar transmission lines at frequencies beyond 20 GHz is presented. Utilization of the anti-resonance point as a source of imaginary permeability to suppress the skin effect is proposed. This idea is backed up by Kramers-Kronig and published experiments. The principle is independent of Landau-Lifshitz-Gilbert magnetic precession damping. The present work contributes both a greater understanding of skin effect manipulation and a method for obtaining zero skin effect using known laminate materials.

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Section: Introductionmentioning

confidence: 88%

“…To be complete, the Maxwell's equations for skin effect must be applied inside the metal, i.e. the laminate ferromagnetic material [2,17]. They cannot be applied to the vacuum.…”

Section: Incorporating Laminate Materials For Complex μmentioning

confidence: 99%

Skin effect suppression for millimeter-wave frequencies through manipulation of permeability

Yamada

2023

Eng. Res. Express

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“…The CRS conductors are fabricated on a glass substrate using a gold wire as the structural core followed by multiple-step electroplating of Cu/NiFe. Due to the radial shape of the structures, electroplating has been selected as the thin film deposition technique to ensure uniformity as other methods like DC sputtering would not work best for these devices [7][8][9]. Arrays of conductors with different dimensions are fabricated (Fig.…”

Section: The Fabricated Cu/nife Crs Conductorsmentioning

confidence: 99%

“…In [7], a practical application of the planar superlattice structure has been showed where RF inductors using a planar multilayered superlattice structure are fabricated and skin effect suppression and increased quality factors have been demonstrated. In [8] and [9], multilayer interconnects with reduced loss have been reported where the loss and quality factor of a coplanar waveguide (CPW) transmission line has been improved. Recently, we have reported a skin effect suppression using a cylindrical radial superlattice (CRS) architecture in the microwave coaxial cable setup [10], where the round shape conductors benefiting from the skin effect suppression have been demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Low loss conductors for CMOS and through glass/silicon via (TGV/TSV) structures using eddy current cancelling superlattice structure

Rahimi

Yoon

2014

2014 IEEE 64th Electronic Components and Technology Conference (ECTC)

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Superlattice structuresconsisting of nonferromagnetic/ferromagnetic metals have been used to create high performance conductors for radio frequency (RF) transmission lines and low loss vias in CMOS and through silicon/glass via (TSV/TGV) structures, whose ohmic resistance and RC delays have been greatly reduced. Two permalloys of Ni80Fe20 and FeCo are studied as the ferromagnetic materials with low and high magnetization saturation that can be used for designing superlattice structures with low and high GHz frequency ranges, respectively. The effects of design parameters including the number of layers and thickness ratio of the superlattice structures have been studied. Full wave simulations have been used to verify them. Finally, a radial superlattice structure consisting of Cu/NiFe layers has been implemented and its resistance has been compared with the control solid-core devices made of copper; proving the effectiveness of the proposed radial superlattice structure for reducing the RF loss. IntroductionThe operation frequency of monolithic integrated circuits has been growing up and reaching the GHz range in modern communication and consumer electronic applications and the clock frequency of today's microprocessors has reached 3 GHz and tends to move to higher frequencies [1]. One of the limiting factors of the high frequency operation is the radio frequency (RF) loss including the dielectric and conductor loss which are associated with devices and circuits operating in the RF range. The mentioned losses together with the inherent parasitic capacitance in those circuits result in the so called RC time delay, preventing the operating frequencies from going higher. The dielectric loss would be reduced by locally removing the dielectric materials forming air-lifted architectures ([2-3]) or using very low loss dielectric materials [4]. Meantime, most electrodes or interconnectors are adopting copper as a conducting material because of its low electrical resistivity, ease of deposition and moderate cost. However, in higher frequencies, its higher conductivity is not as effective and beneficial as it is in the low frequency and DC operation because of the skin effect, where most current is confined in the outermost surface of the conductor and therefore the volume of the conductor is underutilized. As a result, the effective cross section is reduced in RF frequencies and the resistance and conductor loss are increased. Therefore, the high frequency interconnects, transmission lines and vias in a standard CMOS process and in through silicon/glass via (TSV/TGV) structures suffer from large conductor loss. The larger conductor loss will also be significant in high speed digital circuits including analog-to-digital/digital-to-analog converters and processors

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“…The current interest paid to multilayered structures (in connection to its fabrication, and applications concerning superconductivity, skin effect, eddy currents, and photonic metamaterial structures) is witnessed in recent publications [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. Nonetheless, the research topic on multilayered radially inhomogeneous cylindrical structures has received scarce attention.…”

Section: Introductionmentioning

confidence: 99%

A Matrix Approach for the Evaluation of the Internal Impedance of Multilayered Cylindrical Structures

Faria¹

2011

PIER B

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Abstract-A matrix technique for the computation of the perunit-length internal impedance of radially inhomogeneous cylindrical structures is presented. The cylindrical structure is conceptually divided into a number of layers, each layer being characterized by its constitutive parameters, conductivity, permeability, and permittivity. Within this general framework, compound conductors, compound capacitors, compound magnetic cores, or any other compound structures resulting from a mix of the above, can be analyzed by using the very same tool. The developed software program, MLCS, which implements the mentioned matrix technique, also permits the evaluation of the electric and magnetic fields intensity at the layers' interfaces. The MLCS program is validated by using several application examples.

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Magnetic-Multilayered Interconnects Featuring Skin Effect Suppression

Cited by 24 publications

References 6 publications

Skin effect suppression for millimeter-wave frequencies through manipulation of permeability

Skin effect suppression for millimeter-wave frequencies through manipulation of permeability

Low loss conductors for CMOS and through glass/silicon via (TGV/TSV) structures using eddy current cancelling superlattice structure

A Matrix Approach for the Evaluation of the Internal Impedance of Multilayered Cylindrical Structures

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