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US 4,959,631 AGranted
Planar inductor
AssigneeKabushiki Kaisha Toshiba
InventorsMichio Hasegawa, Masashi Sahashi
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AssigneeKabushiki Kaisha Toshiba
InventorsMichio Hasegawa, Masashi Sahashi
Estimating the term…
Disclosed is a planar inductor which has spiral conductor coil means sandwiched between ferromagnetic layers with insulating layers interposed therebetween. The spiral conductor coil means is formed of two spiral conductor coils of the same shape arranged flush with and close to each other. Moreover, the two spiral conductor coils are connected electrically to each other so that currents of different directions flow individually through the conductor coils. Furthermore, the spiral conductor coil means is sandwiched between the two ferromagnetic layers with the insulating layers therebetween, each of the ferromagnetic layers having an area greater than the combined area of the two conductor coils. In the planar inductor according to the present invention, inductance is prevented from lowering while its components are being bonded together, so that the inductance value per unit volume is increased.
A planar inductor comprising a laminated structure including a plurality of spiral conductor coil means sandwiched between ferromagnetic layers each including a plurality of ferromagnetic ribbons, each said ferromagnetic ribbon having a thickness of 100 .mu.m or less.
Dependencies are inferred from the claim text.