Magnetic flux density distribution for a planar magnetic film inductor was calculated as a function of magnetic film thickness, permeability, in-plane slit width and undulation amplitude and insulator thickness which was inserted between magnetic films. It is important to choose a proper combination of magnetic film thickness, permeability and insulator thickness to design inductance and superimposed dc current characteristic of a planar inductor in which the magnetic film structure is multi-layered. Magnetic film slit width doesn't influence on inductance. It is important to decrease undulation amplitude of a magnetic film.
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Inoue et al. (1998) studied this question.
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