Title:
HIGH-FREQUENCY MAGNETIC THIN FILM, COMPOSITE MAGNETIC THIN FILM, AND MAGNETIC DEVICE USING SAME
Document Type and Number:
WIPO Patent Application WO/2003/060933
Kind Code:
A1
Abstract:
A high-frequency magnetic thin film characterized by comprising a first layer made of a T-L composite (where T is Fe or FeCo, and L is one or two kinds of C, B, and N) and a second layer formed on one side of the first layer and made of a Co-based noncrystalline alloy. The high-frequency magnetic thin film has a multilayer structure of a plurality of the first layers and a plurality of the second layers or desirably has a multilayer structure of alternated first and second layers. The thin film has characteristics such that the real part (µ’) of the complex permeability is 400 or more at 1 GHz, a performance index Q (Q=µ’/µ”) is 4 or more, and a saturation magnetization is 14 kG (1.4T) or more.
Inventors:
CHOI KYUNG-KU (JP)
MURASE TAKU (JP)
YAMAZAKI YOHTARO (JP)
MURASE TAKU (JP)
YAMAZAKI YOHTARO (JP)
Application Number:
PCT/JP2003/000163
Publication Date:
July 24, 2003
Filing Date:
January 10, 2003
Export Citation:
Assignee:
TDK CORP (JP)
CHOI KYUNG-KU (JP)
MURASE TAKU (JP)
YAMAZAKI YOHTARO (JP)
CHOI KYUNG-KU (JP)
MURASE TAKU (JP)
YAMAZAKI YOHTARO (JP)
International Classes:
H01F10/16; H01F1/153; H01F10/13; H01F10/14; H01F10/32; H01F17/00; H01F17/04; H01F41/02; H01L27/08; H01L27/22; H01F5/00; H01F41/04; (IPC1-7): H01F10/16
Foreign References:
| JPH0669032A | 1994-03-11 | |||
| JPH02143510A | 1990-06-01 | |||
| JPH0729732A | 1995-01-31 |
Other References:
See also references of EP 1473742A4
Attorney, Agent or Firm:
Oba, Mitsuru (4-3 Iwamotocho 1-chome Chiyoda-ku, Tokyo, JP)
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