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AbstractFeNi3 based core-shell magnetic nanoparticles are demonstrated as the magnetic core material for on-chip, radio frequency (RF) inductors. FeNi3 nanoparticles with 50-150 nm in diameter with 15-20 nm-thick SiO2 coating are chemically synthesized and deposited on a planar inductor as the magnetic core to enhance both inductance (L) and quality factor (Q) of the inductor. Experimentally, the ferromagnetic resonant frequency of the on-chip inductors based on FeNi3 core-shell nanoparticles has been shown to be over several GHz. A post-CMOS process has been developed to integrate the magnetic nanoparticles to a planar inductor and inductance enhancements up to 50% of the original magnitude with slightly enhanced Q-factor up to 1 GHz have been achieved. © 2013 IEEE.
CitationKoh K, Park J, Park J, Zhu X, Lin L (2013) Core-shell magnetic nanoparticles for on-chip RF inductors. 2013 IEEE 26th International Conference on Micro Electro Mechanical Systems (MEMS). Available: http://dx.doi.org/10.1109/MEMSYS.2013.6474279.
SponsorsThis work was supported in part by an Academic Excellence Alliance grant awarded by the KAUST (King Abdullah University of Science and Technology) Office of Competitive Research Fund, the DARPA N/MEMS program and a SRC (Semiconductor Research Corporation) grant. The authors would like to thank Dr. Kevin O'Brien, Jun-Chau Chien and Chia Meng Chen for valuable discussions.