IT963420B - IMPROVED ELECTROMAGNETIC TRANSDUCER - Google Patents

IMPROVED ELECTROMAGNETIC TRANSDUCER

Info

Publication number
IT963420B
IT963420B IT2748772A IT2748772A IT963420B IT 963420 B IT963420 B IT 963420B IT 2748772 A IT2748772 A IT 2748772A IT 2748772 A IT2748772 A IT 2748772A IT 963420 B IT963420 B IT 963420B
Authority
IT
Italy
Prior art keywords
electromagnetic transducer
improved electromagnetic
improved
transducer
electromagnetic
Prior art date
Application number
IT2748772A
Other languages
Italian (it)
Original Assignee
Ibm
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 Ibm filed Critical Ibm
Application granted granted Critical
Publication of IT963420B publication Critical patent/IT963420B/en

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)
IT2748772A 1971-08-21 1972-07-27 IMPROVED ELECTROMAGNETIC TRANSDUCER IT963420B (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
IT963420B true IT963420B (en) 1974-01-10

Family

ID=10408905

Family Applications (1)

Application Number Title Priority Date Filing Date
IT2748772A IT963420B (en) 1971-08-21 1972-07-27 IMPROVED ELECTROMAGNETIC TRANSDUCER

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
KR940004989B1 (en) * 1989-08-04 1994-06-09 마쯔시다덴기산교 가부시기가이샤 Thin film magnetic head
JP2563597B2 (en) * 1989-08-04 1996-12-11 松下電器産業株式会社 Composite thin film magnetic head
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
FR2150335B1 (en) 1978-09-29
JPS4830412A (en) 1973-04-21
DE2233453A1 (en) 1973-02-22
GB1344890A (en) 1974-01-23
CA960356A (en) 1974-12-31
FR2150335A1 (en) 1973-04-06

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