JPS6427014A - Magnetic head - Google Patents

Magnetic head

Info

Publication number
JPS6427014A
JPS6427014A JP18460387A JP18460387A JPS6427014A JP S6427014 A JPS6427014 A JP S6427014A JP 18460387 A JP18460387 A JP 18460387A JP 18460387 A JP18460387 A JP 18460387A JP S6427014 A JPS6427014 A JP S6427014A
Authority
JP
Japan
Prior art keywords
track width
magnetic permeability
effective magnetic
several
main core
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
JP18460387A
Other languages
Japanese (ja)
Inventor
Nobumasa Kaminaka
Hiroshi Yoda
Takeshi Takahashi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP18460387A priority Critical patent/JPS6427014A/en
Publication of JPS6427014A publication Critical patent/JPS6427014A/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
    • 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
    • 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

Landscapes

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

Abstract

PURPOSE:To suppress the disturbance in the envelope of a reproduction output waveform with a single head system by constituting head in such a manner that the effective magnetic permeability across the track width direction is large in the central part of the track width and decreases toward the end part of the track width in a main core part. CONSTITUTION:The main core part is formed by alternately laminating thin magnetic film layers 2 and nonmagnetic insulating layers 3 on a nonmagnetic substrate 1 by a sputtering method. The thin magnetic film layers 6, 10 which constitute the end parts of the track width in this main core part are constituted to have the effective magnetic permeability of about several 10-several 100 and the thin magnetic film layers 7-9 which constitute the central part of the track width have the high effective magnetic permeability of several 1,000. Sufficient recording is, therefore, executed over the entire track width at the time of recording at a high magnetization level and since the effective magnetic permeability when the magnetization level is extremely low is large in the central part of the track width at the time of reproducing, the fluctuation in the envelope of the reproduction output waveform is highly minimized even if the deviation in the tracking by the unstability of the traveling system arises.
JP18460387A 1987-07-23 1987-07-23 Magnetic head Pending JPS6427014A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18460387A JPS6427014A (en) 1987-07-23 1987-07-23 Magnetic head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18460387A JPS6427014A (en) 1987-07-23 1987-07-23 Magnetic head

Publications (1)

Publication Number Publication Date
JPS6427014A true JPS6427014A (en) 1989-01-30

Family

ID=16156101

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18460387A Pending JPS6427014A (en) 1987-07-23 1987-07-23 Magnetic head

Country Status (1)

Country Link
JP (1) JPS6427014A (en)

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