JPS56143514A - Magnetic head - Google Patents

Magnetic head

Info

Publication number
JPS56143514A
JPS56143514A JP4611780A JP4611780A JPS56143514A JP S56143514 A JPS56143514 A JP S56143514A JP 4611780 A JP4611780 A JP 4611780A JP 4611780 A JP4611780 A JP 4611780A JP S56143514 A JPS56143514 A JP S56143514A
Authority
JP
Japan
Prior art keywords
magnetic
sense
center
magnetic flux
fluctuations
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4611780A
Other languages
Japanese (ja)
Inventor
Hitoshi Takagi
Toshio Tanaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP4611780A priority Critical patent/JPS56143514A/en
Publication of JPS56143514A publication Critical patent/JPS56143514A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
    • G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
    • G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
    • G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
    • G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
    • G11B5/398—Specially shaped layers

Abstract

PURPOSE:To improve the efficiency of reproduction by providing a thin ferromagnetic film, having magnetic resistance effect, as a closed magnetic path to the back surface part of a ferrite core having a gap part and by tapering it toward its center part. CONSTITUTION:So that gap part 10 is formed, L type ferrite cores 11 and 12 are provided; the gap part is filled with nonmagnetic material 13, such as glass, and thin ferromagnetic film 14, such as permalloy, having the magnetic resistance effect is provided on the back surface part of ferrite cores 11 and 12 to form a closed magnetic path. At its center part, a magnetic flux sense part is provided and in parallel to it, bias conductor 15 is provided via insulator 16 and then covered with the same insulator 16. Thin ferromagnetic film 14 forms magnetic induction part 23 decreasing in width toward the center and the center part of extremely small width is used as magnetic flux sense part 24. Fluctuations of magnetic flux at gap part 10 result in extreme fluctuations of magnetic flux density at magnetic sense part 24, which are converted into variation in magnetic resistance to flow a sense current between terminals 251 and 252, so that they are detected as fluctuations of the current. Magnetic sense part 24 has magnetic and electric congestion, so that detection having excellent reproduction efficiency is realized.
JP4611780A 1980-04-08 1980-04-08 Magnetic head Pending JPS56143514A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4611780A JPS56143514A (en) 1980-04-08 1980-04-08 Magnetic head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4611780A JPS56143514A (en) 1980-04-08 1980-04-08 Magnetic head

Publications (1)

Publication Number Publication Date
JPS56143514A true JPS56143514A (en) 1981-11-09

Family

ID=12738046

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4611780A Pending JPS56143514A (en) 1980-04-08 1980-04-08 Magnetic head

Country Status (1)

Country Link
JP (1) JPS56143514A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2539542A1 (en) * 1983-01-14 1984-07-20 Magnetic Peripherals Inc MAGNETIC HEAD OF READING
FR2645314A1 (en) * 1989-03-29 1990-10-05 Commissariat Energie Atomique MAGNETIC HEAD WITH MAGNETORESISTANCE FOR LONGITUDINAL RECORDING AND METHOD OF MAKING SUCH A HEAD
EP0652550A1 (en) * 1993-11-08 1995-05-10 Commissariat A L'energie Atomique Read-out magnetic head with multilayer magnetoresistant element and concentrator and manufacturing method
US5476804A (en) * 1993-01-20 1995-12-19 Silmag Process for producing a semiconductor field detector magnetic head

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2539542A1 (en) * 1983-01-14 1984-07-20 Magnetic Peripherals Inc MAGNETIC HEAD OF READING
FR2645314A1 (en) * 1989-03-29 1990-10-05 Commissariat Energie Atomique MAGNETIC HEAD WITH MAGNETORESISTANCE FOR LONGITUDINAL RECORDING AND METHOD OF MAKING SUCH A HEAD
US5208716A (en) * 1989-03-29 1993-05-04 Commissariat A L'energie Atomique Magnetoresistant magnetic head for longitudinal recording and process for producing such a head
US5476804A (en) * 1993-01-20 1995-12-19 Silmag Process for producing a semiconductor field detector magnetic head
EP0652550A1 (en) * 1993-11-08 1995-05-10 Commissariat A L'energie Atomique Read-out magnetic head with multilayer magnetoresistant element and concentrator and manufacturing method
FR2712420A1 (en) * 1993-11-08 1995-05-19 Commissariat Energie Atomique Multilayer magneto-resistive magnetic element readout head and concentrator and method for producing the same.

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