Flat magnetic element and power IC package using the same

Inductor devices – Coil or coil turn supports or spacers – Printed circuit-type coil

Reexamination Certificate

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Details

C336S222000, C336S223000, C336S232000, C336S233000, C336S083000, C428S928000, C428S357000, C148S304000, C252S06251C, C252S062550

Reexamination Certificate

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07821371

ABSTRACT:
A planar magnetic device1including a first magnetic layer3, a second magnetic layer5, and a planar coil4disposed between the first magnetic layer3and the second magnetic layer5, wherein magnetic particles7having a shape ratio S/L of 0.7 to 1 when a length of a long axis is L and a length of a short axis orthogonal to the long axis is L are filled in a gap W between coil wirings of the planar coil4. According to the planar magnetic device1, it is possible to realize a planar magnetic device such as an inductor reduced in height by using fine particles that enable to effectively obtain a large inductance value.

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