EP0269129A2
Expired / Lapsed
EP
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Thin film magnetic head
Assignee: TDK Corp
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Filing: 1987-11-30
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Granted: —
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Expires: 2007-11-30
Abstract
Abstract The present invention relates to a thin film magnetic head used in a magnetic reading and recording apparatus. The thin film magnetic head comprising a pair of yokes (2) made of magnetically permeable film, a thickness of said yokes (2) defining a track width of said thin film magnetic head, a space between first ends (2a) of said pair of yokes (2) defining a magnetic gap of said thin film magnetic head and second ends (2b) of said pair of yokes (2) being apart from each other, a pair of magneto-resistive elements (41, 42) magnetically connected to said second ends (2b) of said pair of yokes (2), respectively, and a return path (3) made of magnetically permeable film, said return path (3) magnetically connecting said pair of magneto-resistive elements (41,42).
Inventors
- 👤 Kazuhiko C/O Nec Corporation Yamada
- 👤 Takao C/O Nec Corporation Maruyama
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 11:52
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/33; G11B5/39; G11B5/3903; G11B5/3906; G11B5/3916; G11B5/3919; G11B5/3922; G11B5/3925; G11B5/3945; G11B5/3948; G11B5/3958; G11B5/3961; G11B5/3964
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
103 words
A thin film magnetic head comprising a pair of yokes made of magnetically permeable film a thickness of said yokes defining a track width of said thin film magnetic head, a space between first ends of said pair of yokes defining a magnetic gap of said thin film magnetic head and second ends of said pair of yokes being apart from each other, a pair of magneto - resistive elements magnetically connected to said second ends of said pair of yokes, respectively, and a return path made of magnetically permeable film, said return path magnetically connecting said pair of magneto - resistive elements.
Claim 2
Dependent Claim
103 words
A thin film magnetic head comprising a pair of yokes made of magnetically permeable film a thickness of said yokes defining a track width of said thin film magnetic head, a space between first ends of said pair of yokes defining a magnetic gap of said thin film magnetic head and second ends of said pair of yokes being apart from each other, a pair of magneto - resistive elements magnetically connected to said second ends of said pair of yokes, respectively, and a return path made of magnetically permeable film, said return path magnetically connecting said pair of magneto - resistive elements.
Claim 3
Dependent Claim
76 words
The thin film magnetic head as claimed in Claim 1, further comprising first and second contacts electrically connected to said pair of magneto-resistive elements, respectively, for being supplied with bias current, a conductor electrically connected to said pair of magneto-resistive elements and an intermediate contact connected to said conductor for generating a first voltage between said first contact and second voltage between said second contact whereby a difference between said first and second voltages is detectable.
Claim 4
Dependent Claim
40 words
The thin film magnetic head as claimed in Claim 1 or 2, wherein a magnetic anisotropy of said yokes and that of said return path are directed perpendicularly to a magnetic flux passing through said yokes and said return path.
Claim 5
Dependent Claim
27 words
The thin film magnetic head as claimed in Claims 1 to 3, further comprising a coil provided around said return path for being supplied with recording current.
Claim 6
Dependent Claim
25 words
The thin film magnetic head as claimed in Claims 1 to 4, wherein said yokes and said return path are formed on the same plane.
Claim 7
Dependent Claim
31 words
The thin film magnetic head as claimed in Claims 1 to 5, wherein said magneto-resistive elements are piled on said yokes and said return path is piled on said magnetro-resistive elements.
Claim 8
Dependent Claim
39 words
The thin film magnetic head as claimed in Claims 1 to 6, further comprising first and second shield layers provided on upper and lower surfaces of said yokes, said first and second shield layers being made of conductive material.
Claim 9
Dependent Claim
32 words
The thin film magnetic head as claimed in Claims 1 to 7, further comprising a pair of hard magnetic material layers provided on a surface of said pair of said magnetro-resistive elements.
References Cited (Backward Citations)
No citation records indexed.
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