Patent US1496834A successfully refreshed from Google Patents.
Patent EP0174144A2 successfully refreshed from Google Patents.
EP0174144A2
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Process for preparing magnetic layer and magnetic head prepared using the same
Assignee: Hitachi Ltd
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Filing: 1985-08-23
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Granted: —
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Expires: 2005-08-23
Abstract
Abstract lon implantation is conducted in a desired area(s) of the surface of a magnetic layer, and annealing of the layer is carried out to control the composition in that desired area(s). The control of the composition may be facilitated by applying a one-directional or rotating magnetic field during ion implantation. In preparing a magnetic head, a portion of a magnetic pole at least on one side thereof in close proximity to a magnetic recording medium is formed into an iron or iron-based magnetic alloy film, at least part of which is subjected to ion implantation and annealing.
Inventors
- 👤 Shigekazu Otomo
- 👤 Noriyuki Kumasaka
- 👤 Ryo Imura
- 👤 Yutaka Sugita
- 👤 Ryo Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 21:16
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; H; H01; H01F; H01F41/00; H01F41/14; H01F41/18; G11B5/1278; G11B5/147; G11B5/187; G11B5/1875; G11B5/1877; G11B5/1878; G11B5/21; G11B5/31; G11B5/3163; Y; Y10; Y10S; Y10S148/00; Y10S148/90; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49034
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
49 words
A process for preparing a magnetic layer comprising the steps of implanting ions into the surface region of a thin transition element-based magnetic film, and annealing said film to form an ion-diffused layer to thereby control the composition of said surface region for forming a desired magnetic compound layer.
Claim 2
Dependent Claim
49 words
A process for preparing a magnetic layer comprising the steps of implanting ions into the surface region of a thin transition element-based magnetic film, and annealing said film to form an ion-diffused layer to thereby control the composition of said surface region for forming a desired magnetic compound layer.
Claim 3
Dependent Claim
37 words
A process for preparing a magnetic layer as claimed in claim 1, wherein said ions are implanted by multiple ion implantation while changing ion acceleration voltages to provide a single composition for said desired magnetic compound layer.
Claim 4
Dependent Claim
44 words
A process for preparing a magnetic layer as claimed in claim 1 or 2, wherein said steps of ion implantation and annealing are repeated after deposition of said thin transition element-based magnetic film to provide a multi-layer structure for said desired magnetic compound layer.
Claim 5
Dependent Claim
61 words
A process for preparing a magnetic layer as claimed in claim 1, wherein said ions are implanted in a desired area(s) of the surface of said thin transition element-based magnetic film, and the resulting magnetic film is annealed to control the composition in said desired area(s) of the surface of said resulting magnetic film for providing a desired mangnetic compound area(s).
Claim 6
Dependent Claim
29 words
A process for preparing a magnetic layer as claimed in claim 1, wherein said transition element mainly constituting said thin transition element-based magnetic film comprises Fe, Co, and Ni.
Claim 7
Dependent Claim
41 words
A process for preparing a magnetic layer as claimed in claim 1, wherein said magnetic layer is provided with a multi-layer structure having a desired magnetic compound layer(s) formed through the steps of ion implantation and annealing and a non-magnetic layer(s).
Claim 8
Dependent Claim
56 words
A magnetic head comprising a magnetic pole formed, in a portion at least on one side thereof in close proximity to a magnetic recording medium, into an iron or iron-based alloy film having at least a portion thereof constituting a region containing at least one element ion-implanted therein and selected from among nitrogen, carbon, and boron.
Claim 9
Dependent Claim
56 words
A magnetic head comprising a magnetic pole formed, in a portion at least on one side thereof in close proximity to a magnetic recording medium, into an iron or iron-based alloy film having at least a portion thereof constituting a region containing at least one element ion-implanted therein and selected from among nitrogen, carbon, and boron.
Claim 10
Dependent Claim
39 words
A magnetic head as claimed in claim 7, wherein said region containing at least one element selected from among nitrogen, carbon, and boron has an average density of said at least one element of 0 to 20 at.% exclusive.
Claim 11
Dependent Claim
38 words
A magnetic head as claimed in claim 7, wherein said region containing at least one element selected from among nitrogen, carbon, and boron has an average density of said at least one element of 5 to 18 at.%.
Claim 12
Dependent Claim
56 words
A magnetic head as claimed in claim 7, 8, or 9, wherein said iron or iron-based alloy film having at least a portion thereof constituting a region containing at least one element ion-implanted therein and selected from among nitrogen, carbon, and boron is one annealed at a temperature of 500°C or lower after the ion implantation.
Claim 13
Dependent Claim
69 words
A magnetic head as claimed in claim 7, 8, or 9, wherein said iron or iron-based alloy film having at least a portion thereof constituting a region containing at least one element ion-implanted therein and selected from among nitrogen, carbon, and boron is one subjected to ion implantation while applying a one-directional magnetic field inside said film or a magnetic field rotating relative to said film inside said film.
Claim 14
Dependent Claim
73 words
A magnetic head as claimed in claim 7, 8, or 9, wherein said iron or iron-based alloy film having at least a portion thereof constituting a region containing at least one element ion-implanted therein and selected from among nitrogen, carbon, and boron is one annealed at a temperature of 500°C or lower while applying a one-directional magnetic field inside said film or a magnetic field rotating relative to said film inside said film.
References Cited (Backward Citations)
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