GB2435346B - A magnetic sensor - Google Patents

A magnetic sensor

Info

Publication number
GB2435346B
GB2435346B GB0707614A GB0707614A GB2435346B GB 2435346 B GB2435346 B GB 2435346B GB 0707614 A GB0707614 A GB 0707614A GB 0707614 A GB0707614 A GB 0707614A GB 2435346 B GB2435346 B GB 2435346B
Authority
GB
United Kingdom
Prior art keywords
magnetic sensor
magnetic
sensor
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 - Fee Related
Application number
GB0707614A
Other versions
GB2435346A (en
GB0707614D0 (en
Inventor
Kazuaki Ikarashi
Naoya Hasegawa
Fumihito Koike
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.)
Alps Alpine Co Ltd
Original Assignee
Alps Electric 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
Priority claimed from JP2004008492A external-priority patent/JP4309772B2/en
Application filed by Alps Electric Co Ltd filed Critical Alps Electric Co Ltd
Priority to GB0707614A priority Critical patent/GB2435346B/en
Publication of GB0707614D0 publication Critical patent/GB0707614D0/en
Publication of GB2435346A publication Critical patent/GB2435346A/en
Application granted granted Critical
Publication of GB2435346B publication Critical patent/GB2435346B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
    • G01R33/09—Magnetoresistive devices
    • G01R33/093—Magnetoresistive devices using multilayer structures, e.g. giant magnetoresistance sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y10/00—Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y25/00—Nanomagnetism, e.g. magnetoimpedance, anisotropic magnetoresistance, giant magnetoresistance or tunneling magnetoresistance
    • 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
    • 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
    • G11B2005/3996—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 large or giant magnetoresistive effects [GMR], e.g. as generated in spin-valve [SV] 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
    • G11B5/3906—Details related to the use of magnetic thin film layers or to their effects
    • G11B5/3912—Arrangements in which the active read-out elements are transducing in association with active magnetic shields, e.g. magnetically coupled shields
    • 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
    • G11B5/3929—Disposition of magnetic thin films not used for directly coupling magnetic flux from the track to the MR film or for shielding
    • G11B5/3932—Magnetic biasing films

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Nanotechnology (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Hall/Mr Elements (AREA)
GB0707614A 2004-01-15 2004-12-14 A magnetic sensor Expired - Fee Related GB2435346B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0707614A GB2435346B (en) 2004-01-15 2004-12-14 A magnetic sensor

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2004008492A JP4309772B2 (en) 2004-01-15 2004-01-15 Magnetic detection element
GB0707614A GB2435346B (en) 2004-01-15 2004-12-14 A magnetic sensor
GB0427311A GB2410121B (en) 2004-01-15 2004-12-14 A magnetic sensor

Publications (3)

Publication Number Publication Date
GB0707614D0 GB0707614D0 (en) 2007-05-30
GB2435346A GB2435346A (en) 2007-08-22
GB2435346B true GB2435346B (en) 2008-01-02

Family

ID=38792064

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0707614A Expired - Fee Related GB2435346B (en) 2004-01-15 2004-12-14 A magnetic sensor

Country Status (1)

Country Link
GB (1) GB2435346B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002329903A (en) * 2001-05-01 2002-11-15 Alps Electric Co Ltd Magnetism detecting element and method of manufacturing the same
JP2002374018A (en) * 2001-06-15 2002-12-26 Alps Electric Co Ltd Magnetic detection element and manufacturing method therefor
US20030035255A1 (en) * 2001-07-19 2003-02-20 Alps Electric Co., Ltd. Exchange coupling film capable of improving playback characteristics
US6556390B1 (en) * 1999-10-28 2003-04-29 Seagate Technology Llc Spin valve sensors with an oxide layer utilizing electron specular scattering effect
US6580589B1 (en) * 2000-10-06 2003-06-17 International Business Machines Corporation Pinned layer structure for a spin valve sensor having cobalt iron (CoFe) and cobalt iron oxide (CoFeO) laminated layers
US20030192168A1 (en) * 2002-01-04 2003-10-16 Headway Technologies, Inc. FeTa nano-oxide layer in pinned layer for enhancement of giant magnetoresistance in bottom spin valve structures

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6556390B1 (en) * 1999-10-28 2003-04-29 Seagate Technology Llc Spin valve sensors with an oxide layer utilizing electron specular scattering effect
US6580589B1 (en) * 2000-10-06 2003-06-17 International Business Machines Corporation Pinned layer structure for a spin valve sensor having cobalt iron (CoFe) and cobalt iron oxide (CoFeO) laminated layers
JP2002329903A (en) * 2001-05-01 2002-11-15 Alps Electric Co Ltd Magnetism detecting element and method of manufacturing the same
JP2002374018A (en) * 2001-06-15 2002-12-26 Alps Electric Co Ltd Magnetic detection element and manufacturing method therefor
US20030035255A1 (en) * 2001-07-19 2003-02-20 Alps Electric Co., Ltd. Exchange coupling film capable of improving playback characteristics
US20030192168A1 (en) * 2002-01-04 2003-10-16 Headway Technologies, Inc. FeTa nano-oxide layer in pinned layer for enhancement of giant magnetoresistance in bottom spin valve structures

Also Published As

Publication number Publication date
GB2435346A (en) 2007-08-22
GB0707614D0 (en) 2007-05-30

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Legal Events

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

Effective date: 20191214