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Search: WFRF:(Liljeholm Jessica) > (2014)

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  • Shah, Umer, et al. (author)
  • Permeability Enhancement by Multilayer Ferromagnetic Composites for Magnetic-Core On-Chip Inductors
  • 2014
  • In: IEEE Microwave and Wireless Components Letters. - : IEEE Press. - 1531-1309 .- 1558-1764. ; 24:10, s. 677-679
  • Journal article (peer-reviewed)abstract
    • This letter reports about unpatterned ferromagnetic NiFe/AlN multilayer composites used as advanced magnetic core materials for on-chip and interposer integrated inductances. The proposed composite structure reduces RF induced currents and thus pushes the permeability cutoff to beyond 3.7 GHz, which is by a factor of 7.1 higher than for homogeneous NiFe layers of same thickness. To the best knowledge of the authors, we achieve the highest effective relative permeability of 28 at 1 GHz, highest ferromagnetic resonance frequency and highest inductance enhancement factor above 1 GHz ever reported for devices based on on-chip unpatterned NiFe magnetic cores. A single loop inductor is also implemented as a technology demonstrator, achieving an inductance enhancement of 4.8 and a quality factor enhancement of 4.5 at 400 MHz.
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Type of publication
journal article (1)
Type of content
peer-reviewed (1)
Author/Editor
Shah, Umer (1)
Oberhammer, Joachim (1)
Ebefors, Thorbjörn (1)
Liljeholm, Jessica (1)
University
Royal Institute of Technology (1)
Language
English (1)
Research subject (UKÄ/SCB)
Engineering and Technology (1)
Year
2014 (1)Undo refine

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