High frequency thin film electrical circuit element

Details High frequency thin film electrical circuit element High frequency thin film electrical circuit element

2004-11-29

2008-10-07

Mai, Anh T (Department: 2832)

Inductor devices

Coil or coil turn supports or spacers

Printed circuit-type coil

C336S223000, C336S232000

Reexamination Certificate

active

07432792

ABSTRACT:
An electrical inductor circuit element comprising an elongate electrical conductor coupled magnetically with thin layers of magnetic material extending along at least a part of the conductor above and below the conductor. The aspect ratio of the thickness of each of the layers of magnetic material to its lateral dimensions is between 0.001 and 0.5 and is preferably between 0.01 and 0.1. This range of aspect ratio has a high ferromagnetic resonance frequency.The inductor preferably includes magnetic interconnections extending beside the conductor and interconnecting the layers of magnetic material at positions where magnetic flux generated by electrical current flowing along the conductor is transverse to the layers.

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patent: 2002/0005565 (2002-01-01), Forbes et al.
patent: 2002/0008605 (2002-01-01), Gardner
patent: 2002/0048668 (2002-04-01), Inoue
patent: 59144105 (1984-08-01), None
Zhuang et al; “Ferromagnetic RF inductors and transformers for standard SMOS/BiCMOS” IEEE Technical Digest, USA, Dec. 2002.
Fergen et al; “Soft ferromagnetic thin films for high frequency applications” Journal of Magnetism and Magnetic Materials, Amsterdam, NL, vol. 242-245, Apr. 2002.
O'Reilly et al; “New integrated planar magnetic cores for inductors and transformersfabricated in MCM-L technology”; International Journal of Microcircuits and electronic Packaging, US vol. 23, No. 1 Jan. 2000.

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