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GB2012095A - Cancellation of thermal noise in magnetoresistive heads - Google Patents

Cancellation of thermal noise in magnetoresistive heads

Info

Publication number
GB2012095A
GB2012095A GB7832634A GB7832634A GB2012095A GB 2012095 A GB2012095 A GB 2012095A GB 7832634 A GB7832634 A GB 7832634A GB 7832634 A GB7832634 A GB 7832634A GB 2012095 A GB2012095 A GB 2012095A
Authority
GB
United Kingdom
Prior art keywords
thermal noise
cancellation
stripe
magnetoresistive heads
magnetoresistive
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.)
Withdrawn
Application number
GB7832634A
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.)
Unisys Corp
Original Assignee
Burroughs 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 Burroughs Corp filed Critical Burroughs Corp
Publication of GB2012095A publication Critical patent/GB2012095A/en
Withdrawn legal-status Critical Current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
    • G11B5/3945—Heads comprising more than one sensitive element
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/0007—Circuits or methods for reducing noise, for correction of distortion, or for changing density of recorded information
    • 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)
  • Magnetic Heads (AREA)

Abstract

Thermal noise in magnetoresistive (MR) heads is cancelled by providing a 'thin film resistor stripe' of non- magnetic material, adjacent to the MR stripe so as to experience the same heat-generating effects and the same, or equivalent, thermal shift in resistance, then using the thermally-induced voltage therefrom to cancel that generated in the MR stripe.
GB7832634A 1978-01-03 1978-08-08 Cancellation of thermal noise in magnetoresistive heads Withdrawn GB2012095A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US86641478A 1978-01-03 1978-01-03

Publications (1)

Publication Number Publication Date
GB2012095A true GB2012095A (en) 1979-07-18

Family

ID=25347559

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7832634A Withdrawn GB2012095A (en) 1978-01-03 1978-08-08 Cancellation of thermal noise in magnetoresistive heads

Country Status (3)

Country Link
JP (1) JPS5497409A (en)
BR (1) BR7808612A (en)
GB (1) GB2012095A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4280158A (en) * 1978-06-19 1981-07-21 U.S. Philips Corporation Magnetoresistive reading head
GB2175735A (en) * 1985-04-26 1986-12-03 Sharp Kk Thin film magnetic head
EP0173942A3 (en) * 1984-08-27 1987-12-02 Sony Corporation Magnetoresistance effect type magnetic head apparatus
GB2281654A (en) * 1993-09-01 1995-03-08 Hitachi Ltd A magnetoresistive head with thermal compensation
US8098450B2 (en) 2009-12-31 2012-01-17 Hitachi Global Storage Technologies, Netherlands B.V. Fly-height management in a hard disk drive (HDD)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4280158A (en) * 1978-06-19 1981-07-21 U.S. Philips Corporation Magnetoresistive reading head
EP0173942A3 (en) * 1984-08-27 1987-12-02 Sony Corporation Magnetoresistance effect type magnetic head apparatus
GB2175735A (en) * 1985-04-26 1986-12-03 Sharp Kk Thin film magnetic head
US4789910A (en) * 1985-04-26 1988-12-06 Sharp Kabushiki Kaisha Thin film magnetic head with an application type silicon dioxide film
GB2175735B (en) * 1985-04-26 1989-06-28 Sharp Kk Thin film magnetic head
GB2281654A (en) * 1993-09-01 1995-03-08 Hitachi Ltd A magnetoresistive head with thermal compensation
US8098450B2 (en) 2009-12-31 2012-01-17 Hitachi Global Storage Technologies, Netherlands B.V. Fly-height management in a hard disk drive (HDD)

Also Published As

Publication number Publication date
BR7808612A (en) 1979-08-07
JPS5497409A (en) 1979-08-01

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)
PCNP Patent ceased through non-payment of renewal fee