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EP0152000A2
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Magnetic transducer using magnetoresistance effect
Assignee: Hitachi Ltd
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Filing: 1985-01-28
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Granted: —
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Expires: 2005-01-28
Abstract
Abstract Disclosed is a magnetic transducer using a magnetoresi- ' stance effect, comprising a magnetoresistive film (1), a hard magnetic film (3) for applying a transverse biasing magnetic field thereto, and a conductive film (2) through which current for applying the transverse biasing magnetic field to the magnetoresistive film (1) flows. The conductive film may be either in electrical contact with or in electrical insulation from the magnetoresistive film. In this magnetic transducer, even when the heights of the respective constituents have changed, the transverse biasing magnetic field to be applied does not change considerably, and an optimum bias field strength is readily attained.
Inventors
- 👤 Yoshihisa Kamo
- 👤 Naoki Sato
- 👤 Masahiro Kitada
- 👤 Tooru Takeura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 23:54
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/06; G01R33/09; G01R33/093; B; B82; B82Y; B82Y25/00; G11; G11B; G11B5/00; G11B5/127; G11B5/33; G11B5/39; G11B5/3903; G11B5/3906; G11B5/3929; G11B5/3932; G11B5/399
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
81 words
A magnetic transducer using a magnetoresistance effect comprising i) a magnetoresistive film, ii) a hard magnetic film which applies a transverse biasing magnetic field to said magnetoresistive film without lying in electrical contact with said magnetoresistive film, and iii) at least one conductive film which is selected from the group consisting of a conductive film that is stacked on said magnetoresistive film in electrical contact therewith and a conductive film that is stacked on said magnetoresistive film through an insulating layer.
Claim 2
Dependent Claim
81 words
A magnetic transducer using a magnetoresistance effect comprising i) a magnetoresistive film, ii) a hard magnetic film which applies a transverse biasing magnetic field to said magnetoresistive film without lying in electrical contact with said magnetoresistive film, and iii) at least one conductive film which is selected from the group consisting of a conductive film that is stacked on said magnetoresistive film in electrical contact therewith and a conductive film that is stacked on said magnetoresistive film through an insulating layer.
Claim 3
Dependent Claim
37 words
A magnetic transducer using a magnetoresistance effect as defined in Claim 1, wherein said magnetoresistive film, said hard magnetic film and said conductive film are sandwiched between shielding soft magnetic members which are disposed through insulating films.
Claim 4
Dependent Claim
26 words
A magnetic transducer using a magnetoresistance effect as defined in Claim 1, wherein said conductive film is stacked on said magnetoresistive film in electrical contact therewith.
Claim 5
Dependent Claim
25 words
A magnetic transducer using a magnetoresistance effect as defined in Claim 3, wherein the conductive films are disposed on both sides of said magnetoresistive film.
Claim 6
Dependent Claim
39 words
5 . A magnetic transducer using a magnetoresistance effect as defined in Claim 3, wherein said magnetoresistive film, said hard magnetic film and said conductive film are sandwiched between shielding soft magnetic members which are disposed through insulating films.
Claim 7
Dependent Claim
21 words
A magnetic transducer using a magnetoresistance effect as defined in Claim 5, wherein said soft magnetic members are soft magnetic films.
Claim 8
Dependent Claim
24 words
A magnetic transducer using a magnetoresistance effect as defined in Claim 5, wherein one of said soft magnetic members serves also as a substrate.'
Claim 9
Dependent Claim
26 words
A magnetic transducer using a magnetoresistance effect as defined in Claim 1, wherein said conductive film is stacked on said magnetoresistive film through said insulating layer.
Claim 10
Dependent Claim
46 words
A magnetic transducer using a magnetoresistance effect as defined in Claim 8, comprising both the conductive film which is stacked on said magnetoresistive film the through said insulating layer and conductive film / which is stacked on said magnetoresistive film in close and electrical contact therewith.
Claim 11
Dependent Claim
37 words
A magnetic transducer using a magnetoresistance effect as defined in Claim 8, wherein said magnetoresistive film, said hard magnetic film and said conductive film are sandwiched between shielding soft magnetic members which are disposed through insulating films.
Claim 12
Dependent Claim
37 words
A magnetic transducer using a magnetoresistance effect as defined in Claim 9, wherein said magnetoresistive film, said hard magnetic film and said conductive films are sandwiched between shielding soft magnetic members which are disposed through insulating films.
Claim 13
Dependent Claim
21 words
A magnetic transducer using a magnetoresistance effect as defined in Claim 10, wherein said soft magnetic members are soft magnetic films.
Claim 14
Dependent Claim
21 words
A magnetic transducer using a magnetoresistance effect as defined in Claim 11, wherein said soft magnetic members are soft magnetic films.
Claim 15
Dependent Claim
24 words
A magnetic transducer using a magnetoresistance- effect as defined in Claim 10, wherein one of said soft magnetic members serves also as a substrate.
Claim 16
Dependent Claim
24 words
A magnetic transducer using a magnetoresistance effect as defined in Claim 11, wherein one of said soft magnetic members serves also as a substrate.
References Cited (Backward Citations)
No citation records indexed.
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