EP0159027A2
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EP
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Magnetic thin film
Assignee: Sony Corp
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Filing: 1985-04-17
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Granted: —
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Expires: 2005-04-17
Abstract
Abstract A magnetic thin film consisting essentially of Fe, Al and Si and further containing nitrogen has high magnetic permeability and high hardness without lowering the magnetic properties such as saturation magnetic flux density or coercive force.The magnetic thin film has an increased specific resistivity and a lowered eddy current loss in the high frequency region and is suitable for a core material of magnetic transducer heads used in a high frequency region.The magnetic thin film is prepared by, for example, physical vapor deposition or ion implantation.
Inventors
- 👤 Kazushi C/O Sony Magnetic Products Inc. Yamauchi
- 👤 Muneyuki C/O Sony Magnetic Products Inc. Ogata
- 👤 Tomio C/O Sony Magnetic Products Inc. Kobayashi
- 👤 Makoto C/O Sony Magnetic Products Inc. Kubota
- 👤 Tatsuo C/O Sony Magnetic Products Inc. Kumura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-10 01:28
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/31; H; H01; H01F; H01F10/00; H01F10/08; H01F10/10; H01F10/12; H01F10/14; H01F10/147; G11B5/147; H01F41/00; H01F41/14; H01F41/20; G11B5/3109; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12431
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
41 words
A magnetic thin film having a composition represented by the following formula: Fe a Al b Si c N d wherein a, b, c and d each represents a weight percent of the respective elements and satisfies the following relations of
Claim 2
Dependent Claim
41 words
A magnetic thin film having a composition represented by the following formula: Fe a Al b Si c N d wherein a, b, c and d each represents a weight percent of the respective elements and satisfies the following relations of
Claim 3
Dependent Claim
80 words
A magnetic thin film having a composition represented by the following formula; Fe a A1 b Si c N d T e wherein T is at least one selected from the group consisting of IIIa group elements, IVa group elements, Va group elements, VIa group elements, VIIa group elements, Ib group elements, Ga, In, Ge, Sn and Sb and a, b, c, d and e each represents a weight percent of the respective elements and satisfies the following relations of
Claim 4
Dependent Claim
80 words
A magnetic thin film having a composition represented by the following formula; Fe a A1 b Si c N d T e wherein T is at least one selected from the group consisting of IIIa group elements, IVa group elements, Va group elements, VIa group elements, VIIa group elements, Ib group elements, Ga, In, Ge, Sn and Sb and a, b, c, d and e each represents a weight percent of the respective elements and satisfies the following relations of
Claim 5
Dependent Claim
21 words
A magnetic thin film according to claim 2, wherein said IIIa group element is Sc, Y, La, Ce, Nd or Gd.
Claim 6
Dependent Claim
18 words
A magnetic thin film according to claim 2, wherein said IVa group element is Ti, Zr or Ef.
Claim 7
Dependent Claim
18 words
A magnetic thin film according to claim 2, wherein said Va group element is V, Nb or Ta.
Claim 8
Dependent Claim
18 words
A magnetic thin film according to claim 2, wherein said VIa group element is Cr, Mo or W.
Claim 9
Dependent Claim
18 words
A magnetic thin film according to claim 2, wherein said VIIa group element is Mn, Tc or Re.
Claim 10
Dependent Claim
18 words
A magnetic this film according to claim 2, wherein said Ib group element is Cu, Ag or Au.
Claim 11
Dependent Claim
44 words
A magnetic thin film having a composition represented by the following formula; wherein P is at least one of platinum group elements and a, b, c, d and e each represents a weight percent of the respective elements and satisfies the following relations of
Claim 12
Dependent Claim
44 words
A magnetic thin film having a composition represented by the following formula; wherein P is at least one of platinum group elements and a, b, c, d and e each represents a weight percent of the respective elements and satisfies the following relations of
Claim 13
Dependent Claim
21 words
A magnetic thin film according to claim 9, wherein said platinum group element is Ru, Rh, Pd, Os, Ir or Pt.
Claim 14
Dependent Claim
80 words
A magnetic thin film having a composition represented by the following formula; wherein T is at least one selected from the group consisting of IIIa group elements, IVa group elements, Va group elements, VIa group elements, VIIa group elements, Ib group elements, Ga, In, Ge, Sn and Sb and P is at least one of platinum group elements and a, b, c, d, e and f each represents a weight percent of the respective_elements and satisfies the following relations of
Claim 15
Dependent Claim
80 words
A magnetic thin film having a composition represented by the following formula; wherein T is at least one selected from the group consisting of IIIa group elements, IVa group elements, Va group elements, VIa group elements, VIIa group elements, Ib group elements, Ga, In, Ge, Sn and Sb and P is at least one of platinum group elements and a, b, c, d, e and f each represents a weight percent of the respective_elements and satisfies the following relations of
Claim 16
Dependent Claim
21 words
A magnetic thin film according to claim 11, wherein said IIIa group elements is Sc, Y, La, Ce, Nd or Gd.
Claim 17
Dependent Claim
18 words
A magnetic thin film according to claim 11, wherein said IVa group element is Ti, Zr or Hf.
Claim 18
Dependent Claim
18 words
A magnetic thin film according to claim 11, wherein said Va group element is V, Nb or Ta.
Claim 19
Dependent Claim
18 words
A magnetic thin film according to claim 11, wherein said VIa group element is Cr, Mo or W.
Claim 20
Dependent Claim
18 words
A magnetic thin film according to claim 11, wherein said VIIa group element is Mn, Tc or Re.
Claim 21
Dependent Claim
18 words
A magnetic thin film according to claim 11, wherein said Ib group element is Cu, Ag or Au.
Claim 22
Dependent Claim
21 words
A magnetic thin film according to claim 11, wherein said platinum group element is Ru, Rh, Pd, Os, Ir or Pt.
Claim 23
Dependent Claim
32 words
A magnetic thin film according to claim 11, wherein said e and f satisfy the relation of e + f 20 when Ru, Rh or Pd is used for platinum group elements.
Claim 24
Dependent Claim
32 words
A magnetic thin film according to claim 11, wherein said e and f satisfy the relation of e + f 40 when Os, Ir or Pt is used for platinum group elements.
Claim 25
Dependent Claim
22 words
A magnetic thin film according to claim 1 to claim 19, wherein a part of Fe is substituted by Co or Ni.
Claim 26
Dependent Claim
28 words
A magnetic thin film according to claim 20, wherein a ratio of substitution by Co is in the range of O to 60 weight percent related to Fe.
Claim 27
Dependent Claim
28 words
A magnetic thin film according to claim 20, wherein a ratio of substitution by Ni is in the range of O to 40 weight percent related to Fe.
References Cited (Backward Citations)
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