Comparative Study of Microfabricated Inductors/Transformers for High-Frequency Power Applications

Dinulovic, Dragan; Shousha, Mahmoud; Haug, Martin; Beringer, Sebastian; Wurz, Marc Christopher

doi:10.1109/tmag.2017.2734878

Cited by 12 publications

(10 citation statements)

References 11 publications

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“…The term "racetrack geometry" refers to microtransformers in which the core or the coils are in a shape resembling a racetrack. Any of the possible microtransformer structures (coplanar, multilayer or solenoid) can be made with this geometry [15], [26], [29], [30], [43], [52], [53], [61]- [63], [66], [70]- [84]. In general, the inductance values achieved using this geometry can vary greatly, due to the different parameters involved (structure, dimensions and core used).…”

Section: Racetrackmentioning

confidence: 99%

“…Since 2010 the wire bonding technique has been added to the list, although one of the first devices built with this technology appeared in an application bulletin of the Burr-Brown Corporation in 1994 [114]. One of the most versatile processes for building microtransformers with any structure and geometry, is microfabrication [2], [5], [6], [17], [22], [25], [28], [40], [49]- [51], [54], [58], [62], [63], [70], [71], [80], [81], [84], [89], [90], [92], [105], [107]- [109], [122], [128]- [130]. Of course, any of the other fabrication approaches may involve microfabrication in some of the processing steps.…”

Section: Fabrication Processesmentioning

confidence: 99%

“…Publications reporting the development of microtransformers for communications are about 34% of the works analyzed [6], [16]- [19], [21], [23], [28], [32], [34]- [39], [48], [49], [51], [52], [55], [60], [61], [63], [68], [74], [75], [82], [83], [95], [103], [107], [110], [121]- [123], [136]. This includes applications like UHF and VHF circuits and microwave monolithic integrated circuits.…”

Section: B Communicationsmentioning

confidence: 99%

See 2 more Smart Citations

A Survey on Microtransformers

Nascimento

Telles

Joanni

et al. 2021

JICS

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The miniaturization of magnetic devices is a subject of enduring interest, since inductors and transformers of very small dimensions are constantly being required for integration into microchips and electrical circuit boards. The main objective of this survey is to supply a compilation of the published research on microtransformers, and to work as a support material, helping in the choice of the most appropriate technology and device configuration for a particular application. The text describes the historical development of microtransformers, the structures in which these devices might be assembled, the various proposed geometries, the fabrication processes, and the type of core used. A brief discussion of equivalent circuit modeling is presented. The current state of the technology in relation to commercial devices is then examined, pointing out some unsolved problems that warrant further studies.

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Section: Racetrackmentioning

confidence: 99%

Section: Fabrication Processesmentioning

confidence: 99%

Section: B Communicationsmentioning

confidence: 99%

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A Survey on Microtransformers

Nascimento

Telles

Joanni

et al. 2021

JICS

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“…Over the last few decades, the field of micro metal coils has evolved rapidly due to the widespread application of micro metal coils in fields such as consumer electronics, the automobile industry, aerospace, machinery, the chemical industry, medicine, among others [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Among the various types of micro metal coils, the coils based on MEMS technology and flexible electronic technology have greater research value [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…The coil turns of micro metal coils are greatly increased in a limited volume, resulting in a more uniform, high-density magnetic field when working [9]. They have the advantages of miniaturization, integration, intelligence, low cost, high performance, and mass production, which are prerequisites for realizing a high level of integration and complexity in modern electronic equipment [12][13][14][15][16]. The micro-transformer produced by micro coil technology has low resistance, high inductance, a high coupling coefficient and quality factor, and plays an important role in switching the power supply, power conversion or signal isolation [15,16].…”

Section: Introductionmentioning

confidence: 99%

Recent Progress in the Preparation Technologies for Micro Metal Coils

et al. 2022

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The recent development of micro-fabrication technologies has provided new methods for researchers to design and fabricate micro metal coils, which will allow the coils to be smaller, lighter, and have higher performance than traditional coils. As functional components of electromagnetic equipment, micro metal coils are widely used in micro-transformers, solenoid valves, relays, electromagnetic energy collection systems, and flexible wearable devices. Due to the high integration of components and the requirements of miniaturization, the preparation of micro metal coils has received increasing levels of attention. This paper discusses the typical structural types of micro metal coils, which are mainly divided into planar coils and three-dimensional coils, and the characteristics of the different structures of coils. The specific preparation materials are also summarized, which provides a reference for the preparation process of micro metal coils, including the macro-fabrication method, MEMS (Micro-Electro-Mechanical System) processing technology, the printing process, and other manufacturing technologies. Finally, perspectives on the remaining challenges and open opportunities are provided to help with future research, the development of the Internet of Things (IoTs), and engineering applications.

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Integrated Passives

2024

Design of Power Management Integrated Circuits

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Comparative Study of Microfabricated Inductors/Transformers for High-Frequency Power Applications

Cited by 12 publications

References 11 publications

A Survey on Microtransformers

A Survey on Microtransformers

Recent Progress in the Preparation Technologies for Micro Metal Coils

Integrated Passives

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