(19)
(11) EP 0 400 550 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
22.05.1991 Bulletin 1991/21

(43) Date of publication A2:
05.12.1990 Bulletin 1990/49

(21) Application number: 90110109.7

(22) Date of filing: 28.05.1990
(51) International Patent Classification (IPC)5: H01F 1/153, H01F 3/00, H05K 9/00
(84) Designated Contracting States:
DE FR GB

(30) Priority: 27.05.1989 JP 133540/89
13.04.1990 JP 98905/89
13.04.1990 JP 98906/89
11.05.1990 JP 122299/90
11.05.1990 JP 122300/90

(71) Applicant: TDK Corporation
Chuo-ku, Tokyo-to 103 (JP)

(72) Inventors:
  • Shigeta, Masao, TDK Corporation
    Tokyo (JP)
  • Kajita, Asako, TDK Corporation
    Tokyo (JP)
  • Hirai, Ippo, TDK Corporation
    Tokyo (JP)
  • Choh, Tsutomu, TDK Corporation
    Tokyo (JP)

(74) Representative: Vogeser, Werner, Dipl.-Ing. et al
Patent- und Rechtsanwälte Hansmann, Vogeser, Dr. Boecker, Alber, Dr. Strych, Liedl Albert-Rosshaupter-Strasse 65
D-81369 München
D-81369 München (DE)


(56) References cited: : 
   
       


    (54) Soft magnetic alloy, method for making, magnetic core, magnetic shield and compressed powder core using the same


    (57) A soft magnetic alloy having a composition of general formula:
    (I)      (Fe1-aNia)100-x-y-z-p-qCuxSiyBzCrpM¹q
    wherein M¹ is V or Mn or a mixture of V and Mn, 0 ≦ a ≦ 0.5, 0.1 ≦ x ≦ 5, 6 ≦ y ≦ 20, 6 ≦ z ≦ 20, 15 ≦ y + z ≦ 30, 0.5 ≦ p ≦ 10, and 0.5 ≦ q ≦ 10 and possessing a fine crystalline phase is suitable as a core, especially a wound core and a compressed powder core.







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