DE69119356D1 - Hochdichte signalverstärkung zeigender magnetoresistiver wiedergabekopf mit kurzgeschlossenem doppelelement - Google Patents

Hochdichte signalverstärkung zeigender magnetoresistiver wiedergabekopf mit kurzgeschlossenem doppelelement

Info

Publication number
DE69119356D1
DE69119356D1 DE69119356T DE69119356T DE69119356D1 DE 69119356 D1 DE69119356 D1 DE 69119356D1 DE 69119356 T DE69119356 T DE 69119356T DE 69119356 T DE69119356 T DE 69119356T DE 69119356 D1 DE69119356 D1 DE 69119356D1
Authority
DE
Germany
Prior art keywords
pointing
short
high density
playback head
closed double
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
DE69119356T
Other languages
English (en)
Other versions
DE69119356T2 (de
Inventor
Neil Smith
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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 Eastman Kodak Co filed Critical Eastman Kodak Co
Application granted granted Critical
Publication of DE69119356D1 publication Critical patent/DE69119356D1/de
Publication of DE69119356T2 publication Critical patent/DE69119356T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G11B5/3948—Heads comprising more than one sensitive element the sensitive elements being active read-out elements
    • G11B5/3951—Heads comprising more than one sensitive element the sensitive elements being active read-out elements the active elements being arranged on several parallel planes
    • G11B5/3954—Heads comprising more than one sensitive element the sensitive elements being active read-out elements the active elements being arranged on several parallel planes the active elements transducing on a single track
    • 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
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • 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
    • G11B5/399—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 with intrinsic biasing, e.g. provided by equipotential strips
DE69119356T 1990-03-29 1991-03-18 Hochdichte signalverstärkung zeigender magnetoresistiver wiedergabekopf mit kurzgeschlossenem doppelelement Expired - Fee Related DE69119356T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/500,978 US5084794A (en) 1990-03-29 1990-03-29 Shorted dual element magnetoresistive reproduce head exhibiting high density signal amplification
PCT/US1991/001753 WO1991015012A2 (en) 1990-03-29 1991-03-18 Shorted dual element magnetoresistive reproduce head exhibiting high density signal amplification

Publications (2)

Publication Number Publication Date
DE69119356D1 true DE69119356D1 (de) 1996-06-13
DE69119356T2 DE69119356T2 (de) 1996-12-19

Family

ID=23991654

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69119356T Expired - Fee Related DE69119356T2 (de) 1990-03-29 1991-03-18 Hochdichte signalverstärkung zeigender magnetoresistiver wiedergabekopf mit kurzgeschlossenem doppelelement

Country Status (5)

Country Link
US (3) US5084794A (de)
EP (1) EP0484474B1 (de)
JP (1) JP3021042B2 (de)
DE (1) DE69119356T2 (de)
WO (1) WO1991015012A2 (de)

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MY107733A (en) * 1991-05-21 1996-05-30 Onstream Inc Combined read/write magnetic head
US5266786A (en) * 1991-10-01 1993-11-30 Ncr Corporation Magnetoresistive head for reading magnetic ink characters
US5378885A (en) * 1991-10-29 1995-01-03 Mars Incorporated Unshielded magnetoresistive head with multiple pairs of sensing elements
US5309304A (en) * 1992-06-05 1994-05-03 Hewlett-Packard Company Magnetoresistive transducer conductor configuration
US5270892A (en) * 1992-06-05 1993-12-14 Hewlett-Packard Company Conductor configuration for magnetoresistive transducers
US5323285A (en) * 1992-06-23 1994-06-21 Eastman Kodak Company Shielded dual element magnetoresistive reproduce head exhibiting high density signal amplification
US5945007A (en) * 1992-10-20 1999-08-31 Cohen; Uri Method for etching gap-vias in a magnetic thin film head and product
US5621595A (en) * 1992-10-20 1997-04-15 Cohen; Uri Pinched-gap magnetic recording thin film head
US5309305A (en) * 1992-11-16 1994-05-03 Read-Rite Corporation Dual element magnetoresistive sensing head
US5485333A (en) * 1993-04-23 1996-01-16 Eastman Kodak Company Shorted DMR reproduce head
US5406433A (en) * 1993-12-01 1995-04-11 Eastman Kodak Company Dual magnetoresistive head for reproducing very narrow track width short wavelength data
DE69510382T2 (de) * 1994-01-12 2000-01-13 Eastman Kodak Co Dualer magnetoresistiver Wiedergabekopf mit magnetischer Abschirmung und Verfahren zu seiner Herstellung
EP0676746B1 (de) * 1994-03-09 1999-08-04 Eastman Kodak Company Magnetoresistiver Wiedergabekopf mit doppeltem Spin-Ventilelement
JP2970455B2 (ja) * 1994-03-14 1999-11-02 株式会社デンソー 磁気抵抗素子の製造方法およびその磁場処理装置
US5696654A (en) * 1994-04-21 1997-12-09 International Business Machines Corporation Dual element magnetoresistive sensor with antiparallel magnetization directions for magnetic state stability
US5442508A (en) * 1994-05-25 1995-08-15 Eastman Kodak Company Giant magnetoresistive reproduce head having dual magnetoresistive sensor
US6510031B1 (en) * 1995-03-31 2003-01-21 International Business Machines Corporation Magnetoresistive sensor with magnetostatic coupling to obtain opposite alignment of magnetic regions
US5914630A (en) * 1996-05-10 1999-06-22 Vtc Inc. MR head preamplifier with output signal amplitude which is independent of head resistance
EP0843827A2 (de) * 1996-06-12 1998-05-27 Koninklijke Philips Electronics N.V. Magnetoresistiver magnetfühler
JPH1098220A (ja) * 1996-09-20 1998-04-14 Sanyo Electric Co Ltd 磁気抵抗効果素子
US5684658A (en) * 1996-10-07 1997-11-04 Headway Technologies, Inc. High track density dual stripe magnetoresistive (DSMR) head
US5721008A (en) * 1996-10-15 1998-02-24 Seagate Technology, Inc. Method for controlling sensor-to-sensor alignment and material properties in a dual magnetoresistive sensor
US5766780A (en) * 1996-10-15 1998-06-16 Seagate Technology, Inc. Reversed order NIMN exchange biasing for dual magnetoresistive heads
US5706151A (en) * 1996-12-12 1998-01-06 Eastman Kodak Company Low bias current paired magnetoresistive head with misaligned anisotropy axes
US5825595A (en) * 1997-05-13 1998-10-20 International Business Machines Corporation Spin valve sensor with two spun values separated by an insulated current conductor
US6118622A (en) * 1997-05-13 2000-09-12 International Business Machines Corporation Technique for robust resetting of spin valve head
US5748399A (en) * 1997-05-13 1998-05-05 International Business Machines Corporation Resettable symmetric spin valve
WO1999059145A1 (en) * 1998-05-13 1999-11-18 Storage Technology Corporation Method for reading both high and low density signals with an mr head
US6128149A (en) * 1998-10-23 2000-10-03 International Business Machines Corporation Method and system for detecting common mode disturbances from a dual stripe magnetoresistive head
US6185079B1 (en) 1998-11-09 2001-02-06 International Business Machines Corporation Disk drive with thermal asperity reduction circuitry using a magnetic tunnel junction sensor
JP2001273611A (ja) 2000-03-28 2001-10-05 Alps Electric Co Ltd 薄膜磁気ヘッド
JP2002074614A (ja) * 2000-08-25 2002-03-15 Alps Electric Co Ltd 磁気ヘッド
US6894878B1 (en) 2002-07-10 2005-05-17 Maxtor Corporation Differential GMR head using anti-parallel pinned layers
US7227726B1 (en) 2002-11-12 2007-06-05 Storage Technology Corporation Method and system for providing a dual-stripe magnetoresistive element having periodic structure stabilization
US7167193B2 (en) * 2003-02-28 2007-01-23 Eastman Kodak Company Active cooling system for laser imager
US7573684B2 (en) * 2005-04-13 2009-08-11 Seagate Technology Llc Current-in-plane differential magnetic tri-layer sensor

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US3493694A (en) * 1966-01-19 1970-02-03 Ampex Magnetoresistive head
US3860965A (en) * 1973-10-04 1975-01-14 Ibm Magnetoresistive read head assembly having matched elements for common mode rejection
US4024489A (en) * 1975-11-18 1977-05-17 International Business Machines Corporation Magnetoresistive sandwich including sensor electrically parallel with electrical shunt and magnetic biasing layers
US4343026A (en) * 1980-07-09 1982-08-03 Spin Physics, Inc. Magnetoresistive head employing field feedback
US4447839A (en) * 1980-10-28 1984-05-08 Compagnie Internationale Pour L'informatique Cii-Honeywell Bull (Societe Anonyme) Magnetoresistant transducer
NL8101962A (nl) * 1981-04-22 1982-11-16 Philips Nv Magnetische sensor.
US4616281A (en) * 1982-03-10 1986-10-07 Copal Company Limited Displacement detecting apparatus comprising magnetoresistive elements
US4589041A (en) * 1982-08-30 1986-05-13 International Business Machines Corporation Differential magnetoresistive sensor for vertical recording
US4668913A (en) * 1985-03-14 1987-05-26 International Business Machines Corporation Constant flux magneto resistive magnetic reluctance sensing apparatus
JPS61242315A (ja) * 1985-04-19 1986-10-28 Hitachi Ltd 磁気抵抗効果型薄膜ヘツド
JPH07105006B2 (ja) * 1985-11-05 1995-11-13 ソニー株式会社 磁気抵抗効果型磁気ヘツド
JPS62159319A (ja) * 1986-01-08 1987-07-15 Sony Corp 磁気抵抗効果型磁気ヘツド
JPS62205511A (ja) * 1986-03-05 1987-09-10 Fuji Photo Film Co Ltd 磁気ヘツド特性測定装置
JP2508475B2 (ja) * 1987-01-28 1996-06-19 ソニー株式会社 磁気抵抗効果型磁気ヘツド
NL8701663A (nl) * 1987-07-15 1989-02-01 Philips Nv Dunne film magneetkop met een magnetoweerstandselement.
DE3820475C1 (de) * 1988-06-16 1989-12-21 Kernforschungsanlage Juelich Gmbh, 5170 Juelich, De
US4878140A (en) * 1988-06-21 1989-10-31 Hewlett-Packard Company Magneto-resistive sensor with opposing currents for reading perpendicularly recorded media
JPH02130711A (ja) * 1988-11-11 1990-05-18 Hitachi Ltd 磁気抵抗効果素子およびこれを用いた磁気ヘッド
US4987509A (en) * 1989-10-05 1991-01-22 Hewlett-Packard Company Magnetoresistive head structures for longitudinal and perpendicular transition detection
US5079663A (en) * 1990-01-29 1992-01-07 International Business Machines Corporation Magnetoresistive sensor with track following capability

Also Published As

Publication number Publication date
WO1991015012A3 (en) 1991-11-28
DE69119356T2 (de) 1996-12-19
WO1991015012A2 (en) 1991-10-03
US5357388A (en) 1994-10-18
JPH04507163A (ja) 1992-12-10
JP3021042B2 (ja) 2000-03-15
EP0484474A1 (de) 1992-05-13
US5193038A (en) 1993-03-09
EP0484474B1 (de) 1996-05-08
US5084794A (en) 1992-01-28

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8328 Change in the person/name/address of the agent

Representative=s name: BLICKLE, K., DIPL.-ING., PAT.-ASS., 70327 STUTTGAR

8328 Change in the person/name/address of the agent

Representative=s name: DR. KUEHNER, H., RECHTSANW., 70327 STUTTGART

8339 Ceased/non-payment of the annual fee