GB1368908A - Magnetic transducing head - Google Patents

Magnetic transducing head

Info

Publication number
GB1368908A
GB1368908A GB5196372A GB5196372A GB1368908A GB 1368908 A GB1368908 A GB 1368908A GB 5196372 A GB5196372 A GB 5196372A GB 5196372 A GB5196372 A GB 5196372A GB 1368908 A GB1368908 A GB 1368908A
Authority
GB
United Kingdom
Prior art keywords
spacer
permalloy
members
gap
magnetically permeable
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
GB5196372A
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
Publication of GB1368908A publication Critical patent/GB1368908A/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
    • G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
    • G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
    • G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
    • G11B5/3906—Details related to the use of magnetic thin film layers or to their effects
    • G11B5/3916—Arrangements in which the active read-out elements are coupled to the magnetic flux of the track by at least one magnetic thin film flux guide
    • G11B5/3919—Arrangements in which the active read-out elements are coupled to the magnetic flux of the track by at least one magnetic thin film flux guide the guide being interposed in the flux path
    • G11B5/3922—Arrangements in which the active read-out elements are coupled to the magnetic flux of the track by at least one magnetic thin film flux guide the guide being interposed in the flux path the read-out elements being disposed in magnetic shunt relative to at least two parts of the flux guide structure
    • G11B5/3925—Arrangements in which the active read-out elements are coupled to the magnetic flux of the track by at least one magnetic thin film flux guide the guide being interposed in the flux path the read-out elements being disposed in magnetic shunt relative to at least two parts of the flux guide structure the two parts being thin films
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/02—Dosimeters
    • G01T1/10—Luminescent dosimeters
    • G01T1/11—Thermo-luminescent dosimeters
    • G01T1/115—Read-out devices
    • 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
    • G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
    • G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
    • G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
    • 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
    • G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
    • G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
    • G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
    • G11B5/3967—Composite structural arrangements of transducers, e.g. inductive write and magnetoresistive read

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Molecular Biology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Magnetic Heads (AREA)

Abstract

1368908 Magnetoresistive transducers INTERNATIONAL BUSINESS MACHINES CORP 10 Nov 1972 [27 Dec 1971] 51963/72 Heading G5R A head comprises a magnetoresistive element 28 adjacent a non-magnetic gap 34 dividing a magnetically permeable member 32, the element 28 being insulated by members 26, 30, which may be of SiO 2 . The element 28 may be of permalloy, as may the member 32 and be shielded by further magnetically permeable members 24, 38 of permalloy. An electrically conductive spacer 36 of non-magnetic material such as copper is inserted between members 32, 38, and the gap 34 may be constituted by the same material as the spacer 36. The head may, as shown, be made by thin film deposition on a glass substrate 22, the part outside lines AA, BB being discarded. Alternatively, the three magnetically permeable elements may be constituted by a unitary member having three legs (6, 8, 10), Fig. 1 (not shown), of permalloy or ferrite, the element (16) being secured across a gap (14) in the central leg. In recording, write currents are passed through the spacer 36. In reading, changes in the resistance of element 28 are measured, the element 28 being supplied with a bias current, and a bias magnetic field formed by passing current through the spacer 36.
GB5196372A 1971-12-27 1972-11-10 Magnetic transducing head Expired GB1368908A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US21259171A 1971-12-27 1971-12-27

Publications (1)

Publication Number Publication Date
GB1368908A true GB1368908A (en) 1974-10-02

Family

ID=22791669

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5196372A Expired GB1368908A (en) 1971-12-27 1972-11-10 Magnetic transducing head

Country Status (12)

Country Link
JP (1) JPS5325488B2 (en)
AU (1) AU466336B2 (en)
BE (1) BE792917A (en)
CA (1) CA1014657A (en)
CH (1) CH557073A (en)
DK (1) DK132595C (en)
ES (1) ES408374A1 (en)
FR (1) FR2165974B1 (en)
GB (1) GB1368908A (en)
IT (1) IT967901B (en)
NL (1) NL7217350A (en)
SE (1) SE382512B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143071A (en) * 1983-07-09 1985-01-30 Magnetic Components Limited Magnetoresistive transducers

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3813692A (en) * 1972-10-11 1974-05-28 Ibm Internally biased magnetoresistive magnetic transducer
US3887945A (en) * 1973-12-12 1975-06-03 Ibm Head assembly for recording and reading, employing inductive and magnetoresistive elements
JPS5110918A (en) * 1974-07-17 1976-01-28 Matsushita Electric Ind Co Ltd JIKI HETSUDO
JPS5123125A (en) * 1974-08-20 1976-02-24 Matsushita Electric Ind Co Ltd JIKI HETSUDO
JPS5821326B2 (en) * 1974-08-20 1983-04-28 松下電器産業株式会社 Jikihed
JPS5846766B2 (en) * 1974-08-22 1983-10-18 日本電気株式会社 Shuyuuseki head
JPS5165925A (en) * 1974-12-04 1976-06-08 Matsushita Electric Ind Co Ltd JIKI HETSUDO
JPS5165923A (en) * 1974-12-04 1976-06-08 Matsushita Electric Ind Co Ltd JIKI HETSUDO
US3975772A (en) * 1975-06-02 1976-08-17 International Business Machines Corporation Double shielded magnetorestive sensing element
JPS5261305A (en) * 1975-11-17 1977-05-20 Nittoku Kensetsu Kk Method of and apparatus for sinking casttin place concrete pile
US4206958A (en) * 1978-03-27 1980-06-10 The Bendix Corporation Electrical conductor having an integral electrical contact
FR2455330A1 (en) * 1979-04-25 1980-11-21 Cii Honeywell Bull MAGNETIC RESISTANCE TRANSDUCTION DEVICE
US4492997A (en) * 1980-11-28 1985-01-08 Hitachi, Ltd. Reproducing and amplifying circuit for magnetoresistive head
US4435634A (en) * 1982-12-22 1984-03-06 International Business Machines Corporation Thermal printer edge compensation

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB900652A (en) * 1957-11-06 1962-07-11 Emi Ltd Improvements in or relating to magnetic transducing heads
US3274575A (en) * 1963-08-01 1966-09-20 Koster Heinz Adolf De Transducer having a magneto-resistive bridge circuit
US3493694A (en) * 1966-01-19 1970-02-03 Ampex Magnetoresistive head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143071A (en) * 1983-07-09 1985-01-30 Magnetic Components Limited Magnetoresistive transducers

Also Published As

Publication number Publication date
ES408374A1 (en) 1976-01-16
NL7217350A (en) 1973-06-29
CA1014657A (en) 1977-07-26
IT967901B (en) 1974-03-11
FR2165974A1 (en) 1973-08-10
DE2262659A1 (en) 1973-07-12
JPS4877818A (en) 1973-10-19
JPS5325488B2 (en) 1978-07-27
FR2165974B1 (en) 1976-08-27
DK132595B (en) 1976-01-05
SE382512B (en) 1976-02-02
DE2262659B2 (en) 1975-10-23
AU466336B2 (en) 1974-06-27
CH557073A (en) 1974-12-13
AU5041172A (en) 1974-06-27
DK132595C (en) 1976-05-31
BE792917A (en) 1973-04-16

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee