EP0206658A2
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EP
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Magnetic head
Assignee: Hitachi Ltd
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Filing: 1986-06-12
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Granted: —
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Expires: 2006-06-12
Abstract
Abstract A magnetic head includes ferromagnetic amorphous alloy multi-layerfilms (16) each composed of an alternate lamination of ferromagnetic amorphous alloy layers (19) and magnetic spacer layers (20). The thickness of each ferromagnetic amorphous alloy layer (19) is of 1 µm to 10 µm. The thickness of each magnetic spacer layer (20) is of 0.01 µm to 0.2 µm. The ferromagnetic amorphous alloy multi-layer films (16) constitute at least parts of the head core.
Inventors
- 👤 Noriyuki Kumasaka
- 👤 Shigekazu Otomo
- 👤 Takeo Esuteto Tachikawa Ichibancho Yamashita
- 👤 Noritoshi Saito
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 04:54
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/147
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
87 words
A magnetic head, comprising ferromagnetic amorphous alloy multi-layer films (16) each of which is constituted by an alternate lamination (Fig. 3) of ferromagnetic amorphous alloy layers (19) and magnetic spacer layers (20), the layer thickness of said ferromagnetic amorphous alloy layer (19) being in a range of 1 µm to 10 µm, while the thickness of said magnetic spacer layer (20) is in a range of 0.01 µm to 0.2 µm, said ferromagnetic amorphous alloy multi-layer films (16) constituting at least parts of head cores (11, 12).
Claim 2
Dependent Claim
87 words
A magnetic head, comprising ferromagnetic amorphous alloy multi-layer films (16) each of which is constituted by an alternate lamination (Fig. 3) of ferromagnetic amorphous alloy layers (19) and magnetic spacer layers (20), the layer thickness of said ferromagnetic amorphous alloy layer (19) being in a range of 1 µm to 10 µm, while the thickness of said magnetic spacer layer (20) is in a range of 0.01 µm to 0.2 µm, said ferromagnetic amorphous alloy multi-layer films (16) constituting at least parts of head cores (11, 12).
Claim 3
Dependent Claim
45 words
A magnetic head according to claim 1, wherein the thickness of the ferromagnetic amorphous alloy layer (19) is in a range of 2 µm to 5 µm, while the thickness of said spacer layer (20) is in a range of 0.02 µm to 0.1 µm.
Claim 4
Dependent Claim
107 words
A magnetic head including two core blocks (11, 12) bonded together with a magnetic gap (17) being interposed therebetween, each of said core blocks being composed of a protective core portion (15) and a ferromagnetic amorphous alloy multi-layer film (16) disposed on said protective core portion to form a magnetic circuit, at least one of said core blocks having a window (21) for accommodating therein a coil winding, wherein said ferromagnetic amorphous alloy multi-layer film (16) includes ferromagnetic amorphous alloy layers (19) each having a thickness of 1 µm to 10 µm and magnetic spacer layers (20) each having a thickness of 0.01 µm to 0.2 µm.
Claim 5
Dependent Claim
107 words
A magnetic head including two core blocks (11, 12) bonded together with a magnetic gap (17) being interposed therebetween, each of said core blocks being composed of a protective core portion (15) and a ferromagnetic amorphous alloy multi-layer film (16) disposed on said protective core portion to form a magnetic circuit, at least one of said core blocks having a window (21) for accommodating therein a coil winding, wherein said ferromagnetic amorphous alloy multi-layer film (16) includes ferromagnetic amorphous alloy layers (19) each having a thickness of 1 µm to 10 µm and magnetic spacer layers (20) each having a thickness of 0.01 µm to 0.2 µm.
Claim 6
Dependent Claim
45 words
A magnetic head according to claim 3, wherein the thickness of one ferromagnetic amorphous alloy layer (19) is in a range of 2 µm to 5 µm, while the thickness of the spacer layer (20) is in a range of 0.02 µm to 0.1 µm.
Claim 7
Dependent Claim
28 words
A magnetic head according to claim 3, wherein the thickness of said ferromagnetic amorphous alloy multi-layer film (16) is in a range of 5 µm to 150 µm.
References Cited (Backward Citations)
No citation records indexed.
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