EP0147126A2
Expired / Lapsed
EP
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Multilayered ferromagnetic amorphous alloy film and magnetic head employing the same
Assignee: Hitachi Ltd
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Filing: 1984-12-11
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Granted: —
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Expires: 2004-12-11
Abstract
Abstract A multilayered ferromagnetic amorphous alloy film is constituted by a plurality of main ferromagnetic material alloy films of a ferromagnetic amorphous alloy laminated one upon another with a spacer ferromagnetic material layer interposed therebetween, the spacer ferromagnetic material layer being of a ferromagnetic material different from the ferromagnetic alloy. The multilayered film has excellent magnetic characteristics and is easily patterned and can be used in at least a portion of a core of a magnetic head.
Inventors
- 👤 Noriyuki Kumasaka
- 👤 Kazuo Shiiki
- 👤 Shigekazu Otomo
- 👤 Yoshihiro Shiroishi
- 👤 Takeo Yamashita
- 👤 Noritoshi Saito
- 👤 Kiminari Shinagawa
- 👤 Mitsuhiro Kudo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 04:57
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/1278; B; B82; B82Y; B82Y25/00; G11B5/147; G11B5/187; G11B5/21; G11B5/31; H; H01; H01F; H01F10/00; H01F10/08; H01F10/10; H01F10/12; H01F10/13; H01F10/32; H01F10/3204; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10S428/9265; Y10S428/928; Y10T; Y10T428/00; Y10T428/11; Y10T428/115; Y10T428/12; Y10T428/12493; Y10T428/12632; Y10T428/12771; Y10T428/12861; Y10T428/12937; Y10T428/12944; Y10T428/12951
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
45 words
A multilayered ferromagnetic amorphous alloy film comprising: a plurality of main ferromagnetic material films of a ferromagnetic amorphous alloy laminated one upon another with a spacer ferromagnetic material layer interposed therebetween, said spacer ferromagnetic layer being of a ferromagnetic material different from said ferromagnetic alloy.
Claim 2
Dependent Claim
45 words
A multilayered ferromagnetic amorphous alloy film comprising: a plurality of main ferromagnetic material films of a ferromagnetic amorphous alloy laminated one upon another with a spacer ferromagnetic material layer interposed therebetween, said spacer ferromagnetic layer being of a ferromagnetic material different from said ferromagnetic alloy.
Claim 3
Dependent Claim
30 words
A multilayered ferromagnetic amorphous alloy film according to claim 1, wherein the thickness of each of the layers constituted by said main ferromagnetic material films is 0.05 to 2 µm.
Claim 4
Dependent Claim
30 words
A multilayered ferromagnetic amorphous alloy film according to claim 1 or 2, wherein the thickness of each layer constituted by said spacer ferromagnetic material layer is 10 to 200 A.
Claim 5
Dependent Claim
59 words
A multilayered ferromagnetic amorphous alloy film according to any one of the preceding claims, wherein each of said main ferromagnetic material films is made of one amorphous alloy which is a Co-Zr system alloy, a Co-Nb system alloy, a Co-Ti system alloy, an Fe-B system alloy, an Fe-Si-B system alloy, an Fe-Co-Si-B system alloy or a Co-Ni-Zr system alloy.
Claim 6
Dependent Claim
62 words
A multilayered ferromagnetic amorphous alloy film according to claim 4, wherein each of said main ferromagnetic material films is made of an amorphous alloy having a composition consisting essentially of one alloy which is a Co-Zr system alloy, a Co-Nb system alloy or a Co-Ti system alloy, and at least one element selected from W, Mo, Ti, Nb, Ta, Si and B.
Claim 7
Dependent Claim
60 words
A multilayered ferromagnetic amorphous alloy film according to any one of the preceding claims, wherein said spacer ferromagnetic material layer is made of an amorphous alloy of a constituent element combination different from that of said main ferromagnetic material films, or one ferromagnetic polycrystalline material selected from Co, Ni, Fe, an Ni-Fe system alloy and an Fe-A -Si system alloy.
Claim 8
Dependent Claim
36 words
A magnetic head comprising: a multilayered ferromagnetic amorphous alloy film according to any one of the preceding claims, said multilayered ferromagnetic amorphous alloy film constituting, at least one portion of a core of said magnetic head.
Claim 9
Dependent Claim
40 words
A magnetic head according to claim 7, wherein at least a portion on the magnetic recording medium side of a magnetic pole effecting generation or both generation and detection of a signal magnetic field is constituted by said multilayered film.
Claim 10
Dependent Claim
37 words
A magnetic head according to claim 7 or 8 wherein at least a portion of a magnetic pole of a ring type magnetic head in the vicinity of a magnetic gap is constituted by said multilayered film.
Claim 11
Dependent Claim
43 words
A magnetic head according to claim 7 or 8, wherein at least a distal end portion of the main magnetic pole of a perpendicular magnetic recording head having a main magnetic pole and an auxiliary magnetic pole is constituted by said multilayered film.
References Cited (Backward Citations)
No citation records indexed.
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