Batch-type millimeter-size transformers for miniaturized power applications

Amalou, F.; Bornand, E.; Gijs, Martin A. M.

doi:10.1109/20.947052

Cited by 18 publications

(8 citation statements)

References 11 publications

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“…With increase in Ferrous ions at higher temperature by controlling its state through oxidation, Ni-Zn and Mn-Zn ferrite can also provide numerous power supplies at low as well as high temperature [42]. Miniaturization also required in such area in order to compete with demand of integrated thin films around 200 o C. Therefore, a new method for synthesizing transformer can also be given with the help of such devices [43].…”

Section: (C) Powermentioning

confidence: 99%

A Review on Synthesis and Characterizations of Mixed Nickel-Zinc Ferrites

Kaur

Kumar

2021

Materials Research Foundations

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Nanotechnology, when this word comes in mind, it gives deep thought of new development in communication, medical science, intelligent transport system and many more. Ferrites nanoparticles have great significance owing to their amazing chemical and physical properties. In modern era we are developing materials for microwave applications and communication devices. Before the discovery of semiconductor memory chips, ferrites were the major form for electronic memory used in computers. Scientist have been studying and working with nanoparticles in magnetically guided drug delivery. The reactivity of material increases by the use of nanoparticles of that material. The dielectric characteristics of ferrites lean on diverse factors for instance methods of preparations and chemical composition. In various studies it has been found that their conductivity has dependence on temperature, composition and frequency. Among the various kinds of ferrites, Ni–Zn ferrites are viewed as the most adaptable ferrites as a result of their novel characteristics for applications at high frequency. The Ni-Zn ferrites are exploited as core materials in a variety of EM devices as well as have broad range of industrial applications e.g. inductors, microwave devices, power supplies, high and low frequency transformer cores, electromagnetic interference (EMI) suppressions and antenna rods. These broad ranges of applications are owing to their high resistivity, low eddy currents, high saturation magnetization, chemical stability and high Curie temperature. In view of this, the present chapter deals with the research progress on nickel-zinc ferrites in the bulk as well as nano size.

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Section: (C) Powermentioning

confidence: 99%

A Review on Synthesis and Characterizations of Mixed Nickel-Zinc Ferrites

Kaur

Kumar

2021

Materials Research Foundations

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“…A different method based on a batch-fabrication method of 3D transformers and inductors has also been proposed [37]. The magnetic core is made of two half magnetic pieces and a printed circuit board (or flexi foil) carrying the electric windings around the core.…”

Section: 3mentioning

confidence: 99%

Novel Applications of Ferrites

Valenzuela

2012

Physics Research International

390

117

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The applications of ferrimagnetic oxides, or ferrites, in the last 10 years are reviewed, including thin films and nanoparticles. The general features of the three basic crystal systems and their magnetic structures are briefly discussed, followed by the most interesting applications in electronic circuits as inductors, in high-frequency systems, in power delivering devices, in electromagnetic interference suppression, and in biotechnology. As the field is considerably large, an effort has been made to include the original references discussing each particular application on a more detailed manner.

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“…In [1], Gardner et al showed that a thin Co-Zr-Ti film provide even higher saturation and lower coercive field strengths than Ni-Fe. Other published magnetic cores were cast ferrite cores [4] [5] or, as a non-integrated alternative, assembled amorphous magnetic ribbons [6].…”

Section: Introductionmentioning

confidence: 99%

High-performance, 3D-microtransformers on multilayered magnetic cores

Moazenzadeh

Spengler

Wallrabe

2013

2013 IEEE 26th International Conference on Micro Electro Mechanical Systems (MEMS)

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We present the fabrication of 3D-microtransformers combining a new type of multilayered magnetic core and coil winding with an automatic wirebonder. For the magnetic cores we stapled up to 30 layers of 20 μm thick amorphous metal layers with an industrial laminator. Intermediate layers of 10 μm thick double-sided sticky tape provided adhesion and electrical insulation. Electrical discharge machining was used to precisely cut these magnetic stacks to sub-millimeter cubes. To flip the cubes by 90° and assemble them onto a wafer for coil winding, we produced a receptor wafer providing magnetic landing sites. Subsequently, to wind a primary and secondary coil, one on top of the other, an automatic wirebonder was employed with 25 μm thick insulated Gold wire. A fabricated transformer with a core size of 0.9*0.8*1 mm 3 yielded an inductance of 1412 nH and a coupling factor of 97%. The maximum transformer efficiency of 73% was measured at a load of 50 Ω.

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Batch-type millimeter-size transformers for miniaturized power applications

Cited by 18 publications

References 11 publications

A Review on Synthesis and Characterizations of Mixed Nickel-Zinc Ferrites

A Review on Synthesis and Characterizations of Mixed Nickel-Zinc Ferrites

Novel Applications of Ferrites

High-performance, 3D-microtransformers on multilayered magnetic cores

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