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JPS6442012A - Magnetic head - Google Patents

Magnetic head

Info

Publication number
JPS6442012A
JPS6442012A JP19803887A JP19803887A JPS6442012A JP S6442012 A JPS6442012 A JP S6442012A JP 19803887 A JP19803887 A JP 19803887A JP 19803887 A JP19803887 A JP 19803887A JP S6442012 A JPS6442012 A JP S6442012A
Authority
JP
Japan
Prior art keywords
magnetic
magnetic pole
flux density
permeability
pole
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
JP19803887A
Other languages
Japanese (ja)
Inventor
Koji Takano
Kazuo Shiiki
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 JP19803887A priority Critical patent/JPS6442012A/en
Publication of JPS6442012A publication Critical patent/JPS6442012A/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
    • G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
    • G11B5/245—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features comprising means for controlling the reluctance of the magnetic circuit in a head with single gap, for co-operation with one track
    • G11B5/2452—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features comprising means for controlling the reluctance of the magnetic circuit in a head with single gap, for co-operation with one track where the dimensions of the effective gap are controlled
    • 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
    • G11B5/3109—Details
    • G11B5/313—Disposition of layers
    • G11B5/3143—Disposition of layers including additional layers for improving the electromagnetic transducing properties of the basic structure, e.g. for flux coupling, guiding or shielding
    • G11B5/3146—Disposition of layers including additional layers for improving the electromagnetic transducing properties of the basic structure, e.g. for flux coupling, guiding or shielding magnetic layers
    • G11B5/3153—Disposition of layers including additional layers for improving the electromagnetic transducing properties of the basic structure, e.g. for flux coupling, guiding or shielding magnetic layers including at least one magnetic thin film coupled by interfacing to the basic magnetic thin film structure

Landscapes

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

Abstract

PURPOSE:To upgrade the reproduction resolution by letting at least either a lower magnetic pole or an upper magnetic pole have a high saturating magnetic flux density, and making a magnetic head consist of a magnetic material of a low permeability and a magnetic material of a high permeability. CONSTITUTION:At least either of the upper magnetic poles 4, 5 or the lower magnetic poles 1, 2 have a high saturating magnetic flux density at their foremost end parts, and the magnetic head is constituted of the low permeability magnetic material and the high permeability magnetic material, so that a magnetic gap length for recording and reproducing as well as magnetic pole thickness for the same come optimum. This means that the high saturating magnetic flux density material formed at least in either the upper magnetic poles 4, 5 or the lower magnetic poles 1, 2 functions as a recording magnetic pole; and that, at the time of recording, when a current in such a value as enough to let the other high-permeability layer constituting the magnetic pole is made flow through a coil 7 for a signal-input/output, only the high saturating magnetic flux density material works as a magnetic pole. Also, since this high saturating magnetic flux density material has a low permeability, at the time of reproducing, inversely, only the high permeability layer acts as a magnetic pole. In such a way, by making the thickness of the high permeability layer of the magnetic pole foremost end part thin, the reproduction resolution can be improved.
JP19803887A 1987-08-10 1987-08-10 Magnetic head Pending JPS6442012A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19803887A JPS6442012A (en) 1987-08-10 1987-08-10 Magnetic head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19803887A JPS6442012A (en) 1987-08-10 1987-08-10 Magnetic head

Publications (1)

Publication Number Publication Date
JPS6442012A true JPS6442012A (en) 1989-02-14

Family

ID=16384503

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19803887A Pending JPS6442012A (en) 1987-08-10 1987-08-10 Magnetic head

Country Status (1)

Country Link
JP (1) JPS6442012A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02308408A (en) * 1989-05-24 1990-12-21 Hitachi Ltd Thin-film magnetic head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02308408A (en) * 1989-05-24 1990-12-21 Hitachi Ltd Thin-film magnetic head

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