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Magnetic-Multilayered Interconnects Featuring Skin Effect Suppression

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5 Author(s)
Yan Zhuang ; Delft Univ. of Technol., Delft ; Rejaei, B. ; Schellevis, H. ; Vroubel, M.
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A novel concept for a high-frequency, low-loss interconnect with significant skin effect suppression over a wide frequency band is presented. The concept is based on a multilayer comprising thin magnetic (Ni80Fe20) and metal (Cu) layers. The negative permeability of the magnetic layers leads to a near-cancellation of the overall permeability of the multilayer stack. This results in a significant increase of skin depth and thus, a more uniform distribution of the current density and a dramatic reduction of loss within a certain frequency range. Coplanar waveguides built using the multilayer technology show more than 50% loss reduction at 14 GHz compared to their thick Cu-based counterparts.

Published in:

Electron Device Letters, IEEE  (Volume:29 ,  Issue: 4 )