Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Patent
1996-09-03
1998-09-01
Kozma, Thomas J.
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
296021, 336 83, 336200, 336212, 336218, G05F 140, H01F 2730, H01F 4100
Patent
active
058015213
ABSTRACT:
Disclosed herein is a planar magnetic element comprising a substrate, a first magnetic layer arranged over the substrate, a first insulation layer arranged over the first magnetic layer, a planer coil formed of a conductor, having a plurality of turns, arranged over the first insulation layer and having a gap aspect ratio of at least 1, the gap aspect ratio being the ratio of the thickness of the conductor to the gap between any adjacent two of the turns, a second insulation layer arranged over the planar coil, and a second magnetic layer arranged over the second insulation layer. When used as an inductor, the planar magnetic element has a great quality coefficient Q. When used as a transformer, it has a large gain and a high voltage ratio. Since the element is small and thin, it is suitable for use in an integrated circuit, and can greatly contribute to miniaturization of electronic devices.
REFERENCES:
patent: 3319206 (1967-05-01), Harloff
patent: 4959631 (1990-09-01), Hasagawa et al.
IEEE Trans. on Magnetics, vol. 26, No. 3, May 1990, pp. 1204-1209.
Yamasawa et al, "High Frequency Operation on a Planar-Type Microtransformer and Its Application to Multilayered Switching Regulators".
IEEE Trans. on Power Electronics, vol. 4, vol. Jan. 1989 Goldberg et al, "Issues Related to 1-10-MH.sub.2 Transformer Design".
Hasegawa Michio
Mizoguchi Tetsuhiko
Sahashi Masashi
Sato Toshiro
Sawabe Atsuhito
Kabushiki Kaisha Toshiba
Kozma Thomas J.
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