JPS57208617A - Unified thin film magnetic head for erasion and recording - Google Patents

Unified thin film magnetic head for erasion and recording

Info

Publication number
JPS57208617A
JPS57208617A JP9386281A JP9386281A JPS57208617A JP S57208617 A JPS57208617 A JP S57208617A JP 9386281 A JP9386281 A JP 9386281A JP 9386281 A JP9386281 A JP 9386281A JP S57208617 A JPS57208617 A JP S57208617A
Authority
JP
Japan
Prior art keywords
recording
magnetic head
thin film
magnet
magnetic
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
JP9386281A
Other languages
Japanese (ja)
Inventor
Masamichi Yamada
Isao Oshima
Masakatsu Saito
Katsuyuki 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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP9386281A priority Critical patent/JPS57208617A/en
Publication of JPS57208617A publication Critical patent/JPS57208617A/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
    • G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)

Abstract

PURPOSE:To attain the miniaturization and a reduction of power consumption for a unified magnetic head for both erasion and recording, by setting a permanent magnet magnetized in the uniaxial direction at the position near a magnetic gap so as to give a magnetic field of the same level as the coercive force of a recording medium of the travelling direction of the recording medium. CONSTITUTION:A permanent magnet 10 magnetized in the uniaxial direction 11 is unified with a thin film magnetic head element at the position near the magnetic gap of a reccording medium 3 with the adhesion of glass, resin, etc. The meadium 3 abuts to the end face of the magnet 10 having a distribution of the magnetic charge before it abuts to the magnetic gap. The magnetic field near the end face of the magnet 10 has a considerably large value, and as a result the old signal recorded to the medium 3 in the form of the preceding career is demagnetized by a direct current. Then the recording current can be reduced due to a DC bias effect by selecting properly the positions of a thin film magnetic head element and the magnet 10 respectively.
JP9386281A 1981-06-19 1981-06-19 Unified thin film magnetic head for erasion and recording Pending JPS57208617A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9386281A JPS57208617A (en) 1981-06-19 1981-06-19 Unified thin film magnetic head for erasion and recording

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9386281A JPS57208617A (en) 1981-06-19 1981-06-19 Unified thin film magnetic head for erasion and recording

Publications (1)

Publication Number Publication Date
JPS57208617A true JPS57208617A (en) 1982-12-21

Family

ID=14094243

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9386281A Pending JPS57208617A (en) 1981-06-19 1981-06-19 Unified thin film magnetic head for erasion and recording

Country Status (1)

Country Link
JP (1) JPS57208617A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6139911A (en) * 1984-07-31 1986-02-26 Toshiba Corp Magnetic recording and reproducing device
WO1986002189A1 (en) * 1984-10-05 1986-04-10 Olympus Optical Co., Ltd. Compound magnetic head

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6139911A (en) * 1984-07-31 1986-02-26 Toshiba Corp Magnetic recording and reproducing device
WO1986002189A1 (en) * 1984-10-05 1986-04-10 Olympus Optical Co., Ltd. Compound magnetic head
US4862304A (en) * 1984-10-05 1989-08-29 Olympus Optical Co., Ltd. Composite magnetic head

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