Abstract
In this paper a novel spiral inductor with high quality (Q)-factor is presented. Non-uniform current density distribution, especially in inner turn, increases the effective metal resistance due to skin and proximity effect. In order to overcome this problem, an improved inductor layout with non-uniform metal width and non-uniform spacing is proposed to increase the quality factor. For this inductor layout, from outer coil to inner coil, the metal widths are reduced but spacing between strips are increased. Mainly due to the decrease of eddy current loss by weakening the current crowding effect in the center of the spiral inductor. By reducing the current crowding effect, the effective resistance is minimized, thereby increase the quality factor. Simulation has been taken using COMSOL Multiphysics software. The results indicate that maximum value of quality factor and self-inductance of the novel inductor have been obtained about 80.34 and 324 nH, respectively. Which Q-factor improves 27% more than conventional inductors with uniform width. The dimension of the inductor is 1700 × 1660 μm.
Similar content being viewed by others
References
Chen J, Liou JJ (2004) On-chip spiral inductors for RF applications: an overview. Semicond Technol Sci 4(3):149–167
Finkenzeller K (2003) RFID Handbook, 2nd edn. Giesecke & Devrient GmbH, Munich
Ganji BA, Molanzadeh M (2017) High performance planar micro-transformer using novel crossover connection. Microsyst Technol 23(10):4413–4418
Kuhn WB, Ibrahim NM (2001) Analysis of current crowding effects in multiturn spiral inductors. IEEE Trans Microw Theory Tech 49(1):31–38
Lin YS, Hsu HM (2002) High-performance micromachined tapered spiral inductors with resonant frequency of 17 GHz. Microw Opt Technol Lett 35(1):56–60
Lopez-Villegas JM, Samitier J, Cane C, Losantos P, Bausells J (2000) Improvement of the quality factor of RF integrated inductors by layout optimization. IEEE Trans Microw Theory Tech 48(1):76–83
Mohan SS (1999) The design, modeling and optimization of on-chip inductor and transformer circuits. PHD thesis, Stanford University
Niknejad AM, Meyer RG (2000) Design, Simulation and applications of inductors and transformers for SI RF ICs. Silicon Laboratories, Austin TX and the University of California, Berkeley
Niknejad AM, Meyer RG (2001) Analysis of eddy-current losses over conductive substrates with applications to monolithic inductors and transformers. IEEE Trans Microw Theory Tech 49(1):166–176
Pei S, Wanrong Z, Lu H, Dongyue J, Hongyun X (2011) Improving the quality factor of an RF spiral inductor with non-uniform metal width and non-uniform coil spacing. J Semicond 32(6):064011
Pirouznia P, Ganji BA (2014) Analytical optimization of high performance and high quality factor MEMS spiral inductor. Prog Electromagn Res 34:171–179
Saberhosseini SS, Ganji BA, Razeghi A, Mahmoudi Z (2016) Modeling and simulation of MEMS spiral inductor” 24th Iranian conference on electrical engineering (ICEE)
Wang C, Kim N-Y (2012) Analytical optimization of high-performance and high-yield spiral inductor in integrated passive device technology. Elsevier Microelectron J 43:176–181
Wang XN, Zhao XL, Zhou Y, Dai XH, Cai BC (2004) Fabrication and performance of a novel suspended RF spiral inductor. IEEE Trans Electron Devices 51(5):814–816
Xu X, Li P, Cai M, Han B (2012) Design of novel high-$ Q $-factor multipath stacked on-chip spiral inductors. IEEE Trans Electron Devices 59(8):2011–2018
Yue CP, Wong SS (2000) Physical modeling of spiral inductors on silicon. IEEE Trans Electron Devices 47(3):560–568
Author information
Authors and Affiliations
Corresponding author
Additional information
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
About this article
Cite this article
Azizollah Ganji, B., Kheiry, S. Design and analysis of a novel MEMS spiral inductor with high quality factor. Microsyst Technol 24, 3321–3328 (2018). https://doi.org/10.1007/s00542-018-3914-2
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00542-018-3914-2