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Basic Properties of an LC Filter Using a Thin-Film Inductor

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3 Author(s)
Yamaguchi, M. ; Tohoku University ; Ishihara, K. ; Arai, K.I.

This paper discusses the application of thin-film inductors to thin-film-based LC filters. We fabricated a monolithic thin-film LC filter by using rf sputtering and dry etching techniques. The filter consists of thin-film inductors and thin-film capacitors fabricated on a common substrate. This filter was designed as a second-order low-pass filter having Chebyshev characteristics, with a cut-off frequency of 50 MHz. We developed a technique for measuring this two-port device at high frequencies, and then measured the frequency characteristics. Here we discuss the merits of thin-film LC filters using soft magnetic thin films.

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Magnetics in Japan, IEEE Translation Journal on  (Volume:9 ,  Issue: 2 )