High-frequency noise suppression in downsized circuits using magnetic granular films

Shigeyoshi Yoshida, Hiroshi Ono, Shinsuke Ando, Fumishiro Tsuda, Tetsuo Ito, Yutaka Shimada, Masahiro Yamaguchi, Ken Ichi Arai, Shigehiro Ohnuma, Tsuyoshi Masumoto

Research output: Contribution to journalConference articlepeer-review

101 Citations (Scopus)


Noise suppression in downsized circuits utilizing magnetic granular films is demonstrated. Films of Fe-Al-O with thickness of 2 μm which exhibit very high μ″ dispersion in the quasimicrowave band were found to work as noise suppressors. The films were attached onto a micro-strip line and the transmission characteristics were compared. This work is the first to verify that films with only 2 μm thickness can play a role in suppression of high frequency conduction noise in the quasimicrowave band. The results suggest a possibility of thin film noise suppressors which can be integrated into micron scale semiconductor circuits.

Original languageEnglish
Pages (from-to)2401-2403
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number4 I
Publication statusPublished - 2001 Jul
Event8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) - San Antonio, TX, United States
Duration: 2001 Jan 72001 Jan 11


  • Conduction noise-suppression
  • EMC
  • Ferromagnetic granular film
  • Transmission characteristics


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