CA960356A - Electromagnetic transducers - Google Patents

Electromagnetic transducers

Info

Publication number
CA960356A
CA960356A CA147,826A CA147826A CA960356A CA 960356 A CA960356 A CA 960356A CA 147826 A CA147826 A CA 147826A CA 960356 A CA960356 A CA 960356A
Authority
CA
Canada
Prior art keywords
electromagnetic transducers
transducers
electromagnetic
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.)
Expired
Application number
CA147,826A
Other versions
CA147826S (en
Inventor
Brian R. Hearn
Rafael Pascual
Andrew Paton
Arthur S. Jones
James M. L. Vigar
Brian W. Kington
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Application granted granted Critical
Publication of CA960356A publication Critical patent/CA960356A/en
Expired 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)
CA147,826A 1971-08-21 1972-07-25 Electromagnetic transducers Expired CA960356A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3931671 1971-08-21

Publications (1)

Publication Number Publication Date
CA960356A true CA960356A (en) 1974-12-31

Family

ID=10408905

Family Applications (1)

Application Number Title Priority Date Filing Date
CA147,826A Expired CA960356A (en) 1971-08-21 1972-07-25 Electromagnetic transducers

Country Status (6)

Country Link
JP (1) JPS4830412A (en)
CA (1) CA960356A (en)
DE (1) DE2233453A1 (en)
FR (1) FR2150335B1 (en)
GB (1) GB1344890A (en)
IT (1) IT963420B (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2480014A1 (en) * 1980-04-02 1981-10-09 Cii Honeywell Bull MAGNETIC TRANSDUCER FOR READING AND / OR RECORDING INFORMATION CONTAINED ON A MAGNETIC MEDIUM
FR2480015A1 (en) * 1980-04-02 1981-10-09 Cii Honeywell Bull MAGNETIC MAGNETIC TRANSDUCER WITH HIGH VARIABLE DIMENSION FOR READING AND WRITING INFORMATION CONTAINED IN A MAGNETIC MEDIUM
FR2489570A1 (en) * 1980-08-27 1982-03-05 Cii Honeywell Bull INTEGRATED MAGNETIC TRANSDUCER
CA1189969A (en) * 1982-05-26 1985-07-02 Gilbert D. Springer Differential-permeability field-concentrating magnetic writing head
JP2563597B2 (en) * 1989-08-04 1996-12-11 松下電器産業株式会社 Composite thin film magnetic head
US5097372A (en) * 1989-08-04 1992-03-17 Matsushita Electric Industrial Co., Ltd. Thin film magnetic head with wide recording area and narrow reproducing area
JPH0383213A (en) * 1989-08-24 1991-04-09 Matsushita Electric Ind Co Ltd Thin film magnetic head
US6771462B1 (en) 1999-09-20 2004-08-03 Seagate Technology Llc Perpendicular recording head including concave tip
US6865056B1 (en) 1999-10-05 2005-03-08 Seagate Technology Llc Longitudinal magnetic recording heads with variable-length gaps
DE60006984D1 (en) * 1999-10-05 2004-01-15 Seagate Technology Llc MAGNETIC HEADS WITH VARIABLE COLUMN FOR LONGITUDINAL RECORDING
US6898053B1 (en) 1999-10-26 2005-05-24 Seagate Technology Llc Perpendicular recording head with trackwidth defined by plating thickness
US6560069B1 (en) 1999-11-29 2003-05-06 Seagate Technology, Llc Perpendicular recording head defining the trackwidth by material deposition thickness
US6707642B1 (en) 2000-02-04 2004-03-16 Seagate Technology Llc Longitudinal magnetic recording head with reduced side fringing
US6693768B1 (en) 2000-03-15 2004-02-17 Seagate Technology Llc Perpendicular magnetic recording head having a flux focusing main pole

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2963690A (en) * 1957-10-14 1960-12-06 Ibm Magnetic transducer
US3171107A (en) * 1961-07-03 1965-02-23 Ibm Wide-record narrow-read magnetic head

Also Published As

Publication number Publication date
GB1344890A (en) 1974-01-23
FR2150335B1 (en) 1978-09-29
DE2233453A1 (en) 1973-02-22
JPS4830412A (en) 1973-04-21
FR2150335A1 (en) 1973-04-06
IT963420B (en) 1974-01-10

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