ES2093114T3 - Cabezal magnetorresistivo horizontal sin pantalla protectora y metodo para su fabricacion. - Google Patents

Cabezal magnetorresistivo horizontal sin pantalla protectora y metodo para su fabricacion.

Info

Publication number
ES2093114T3
ES2093114T3 ES91920423T ES91920423T ES2093114T3 ES 2093114 T3 ES2093114 T3 ES 2093114T3 ES 91920423 T ES91920423 T ES 91920423T ES 91920423 T ES91920423 T ES 91920423T ES 2093114 T3 ES2093114 T3 ES 2093114T3
Authority
ES
Spain
Prior art keywords
head
horizontal
magnetorresistive
manufacture
elements
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 - Lifetime
Application number
ES91920423T
Other languages
English (en)
Inventor
Robert Edward Jones Jr
Mark Howard Kryder
Keith Robert Mountfield
Javier Ignacio Guzman
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.)
Mars Inc
Original Assignee
Mars Inc
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 Mars Inc filed Critical Mars Inc
Application granted granted Critical
Publication of ES2093114T3 publication Critical patent/ES2093114T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G11B5/3958—Heads comprising more than one sensitive element the sensitive elements being active read-out elements the active elements being arranged in a single plane, e.g. "matrix" disposition
    • 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
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/004—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using digital security elements, e.g. information coded on a magnetic thread or strip
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/04—Testing magnetic properties of the materials thereof, e.g. by detection of magnetic imprint
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/20—Testing patterns thereon
    • 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
    • G11B5/09—Digital recording

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Security & Cryptography (AREA)
  • Mathematical Physics (AREA)
  • Measuring Magnetic Variables (AREA)
  • Magnetic Heads (AREA)

Abstract

SE TRATA DE UN CABEZAL MAGNETORESISTIVO HORIZONTAL SIN BLINDAJE (1) PARA DISPOSITIVOS DE EXPLORACION Y LECTURA MAGNETICA. EL CABEZAL MAGNETORESISTIVO HORIZONTAL SIN BLINDAJE (1) SE COMPONE DE DOS ELEMENTOS MAGNETORESISTIVOS (2) SEPARADOS POR UN VACIO (10), Y UNA BARRA CONDUCTORA (3) QUE CONECTA ELECTRICAMENTE LOS ELEMENTOS MAGNETOSRESISTIVOS (2) ENTRE SI Y CON UN PUNTO ELECTRICO COMUN, COMO PUEDE SER UNA TOMA DE TIERRA (4). UN CIRCUITO DETECTOR DE VOLTAJE DIFERENCIAL (35) ESTA CONECTADO AL OTRO LADO DE LOS ELEMENTOS MAGNETORESISTIVOS (2) PARA DETECTAR VARIACIONES EN EL VOLTAJE CUANDO EL CABEZAL (1) ESTA EXPLORANDO DATOS MAGNETICOS. LA PRESENTE INVENCION ADEMAS PERMITE UN PROCESO DE FABRICACION SIMPLIFICADO, LO QUE CONLLEVA UNA REDUCCION DE COSTES Y METODOS Y PROCEDIMIENTOS DE FABRICACION MAS EFICIENTES.
ES91920423T 1990-10-30 1991-10-22 Cabezal magnetorresistivo horizontal sin pantalla protectora y metodo para su fabricacion. Expired - Lifetime ES2093114T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/605,513 US5155643A (en) 1990-10-30 1990-10-30 Unshielded horizontal magnetoresistive head and method of fabricating same

Publications (1)

Publication Number Publication Date
ES2093114T3 true ES2093114T3 (es) 1996-12-16

Family

ID=24423975

Family Applications (1)

Application Number Title Priority Date Filing Date
ES91920423T Expired - Lifetime ES2093114T3 (es) 1990-10-30 1991-10-22 Cabezal magnetorresistivo horizontal sin pantalla protectora y metodo para su fabricacion.

Country Status (8)

Country Link
US (1) US5155643A (es)
EP (1) EP0555354B1 (es)
JP (1) JP3244503B2 (es)
KR (1) KR100228837B1 (es)
CA (1) CA2095035C (es)
DE (1) DE69122260T2 (es)
ES (1) ES2093114T3 (es)
WO (1) WO1992008226A1 (es)

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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
US5323285A (en) * 1992-06-23 1994-06-21 Eastman Kodak Company Shielded dual element magnetoresistive reproduce head exhibiting high density signal amplification
JPH06139525A (ja) * 1992-10-27 1994-05-20 Sony Corp 磁気抵抗効果型ヘッド用再生装置
US5358088A (en) * 1992-11-25 1994-10-25 Mars Incorporated Horizontal magnetoresistive head apparatus and method for detecting magnetic data
DE69331895T2 (de) * 1992-12-29 2002-12-19 Eastman Kodak Co Magnetoresistiver Magnetfeldsensor mit sehr langem Wirkbereich
IT1263970B (it) * 1993-02-11 1996-09-05 Mantegazza A Arti Grafici Dispositivo di sicurezza antifalsificazione per documenti in genere
US5583631A (en) * 1993-02-11 1996-12-10 Mantegazza Antonio Arti Grafiche S.R.L. Anticounterfeit security device . . . including two security elements
US5406433A (en) * 1993-12-01 1995-04-11 Eastman Kodak Company Dual magnetoresistive head for reproducing very narrow track width short wavelength data
US5604651A (en) * 1994-02-23 1997-02-18 Applied Magentics Corporation Read head with 4-point magnetoresistive sensing
US5640753A (en) * 1994-03-03 1997-06-24 Seagate Technology, Inc. Method of fabricating an inverted magnetoresistive head
US5668689A (en) * 1994-03-03 1997-09-16 Seagate Technology, Inc. Inverted magnetoresistive head
US6510031B1 (en) 1995-03-31 2003-01-21 International Business Machines Corporation Magnetoresistive sensor with magnetostatic coupling to obtain opposite alignment of magnetic regions
US5614824A (en) * 1995-05-15 1997-03-25 Crane & Co., Inc. Harmonic-based verifier device for a magnetic security thread having linear and non-linear ferromagnetic characteristics
US5701222A (en) * 1995-09-11 1997-12-23 International Business Machines Corporation Spin valve sensor with antiparallel magnetization of pinned layers
US5936814A (en) * 1996-06-03 1999-08-10 Seagate Technology, Inc. Magnetic recording head using a last insulator to obtain an adjustable take off angle
US5767495A (en) * 1996-07-29 1998-06-16 Mag-Tek, Inc. Reduced-power magnetic transducer system utilizing a magnetoresistive head
JP3258245B2 (ja) * 1996-11-27 2002-02-18 キヤノン電子株式会社 硬貨識別装置
US6195228B1 (en) * 1997-01-06 2001-02-27 Nec Research Institute, Inc. Thin, horizontal-plane hall sensors for read-heads in magnetic recording
US6104562A (en) * 1997-04-03 2000-08-15 International Business Machines Corporation Multiple element transducer for magnetic recording
US6440750B1 (en) * 1997-06-10 2002-08-27 Agere Systems Guardian Corporation Method of making integrated circuit having a micromagnetic device
US6047886A (en) * 1998-01-06 2000-04-11 Cash Code Company Inc. Validator with replaceable sensor module
US6098880A (en) * 1998-03-20 2000-08-08 Seagate Technology, Inc. Shaped magnetoresistive readers
US6255714B1 (en) 1999-06-22 2001-07-03 Agere Systems Guardian Corporation Integrated circuit having a micromagnetic device including a ferromagnetic core and method of manufacture therefor
FR2802011B1 (fr) * 1999-12-01 2002-01-04 Planhead Silmag P H S Tete de lecture planaire a element magneto-resistif
US6378773B1 (en) 2000-05-23 2002-04-30 Banctec, Inc. Shielded roller for reducing magnetic interferences in a MICR system read head
US6927948B2 (en) * 2003-01-23 2005-08-09 Hitachi Global Storage Technologies Netherlands B.V. Differential CPP GMR sensor with free layers separated by metal gap layer
US20080068752A1 (en) * 2006-09-19 2008-03-20 International Business Machines Corporation Planar Bidirectional Tape Head With Planar Read And Write Elements
US20080068750A1 (en) * 2006-09-19 2008-03-20 International Business Machines Corporation Planar Write Module And Hybrid Planar Write-Vertical Read Bidirectional Tape Head
JP2008085080A (ja) * 2006-09-27 2008-04-10 Fujitsu Ltd 磁気抵抗効果素子とその製造方法及びその磁気抵抗効果素子を用いた磁気記録装置
US8297507B2 (en) 2008-09-11 2012-10-30 Toshiba International Corporation Magnetoresistive detection system and method for detection of magnetic image of bank notes
US8829901B2 (en) * 2011-11-04 2014-09-09 Honeywell International Inc. Method of using a magnetoresistive sensor in second harmonic detection mode for sensing weak magnetic fields
US9104922B2 (en) * 2012-06-15 2015-08-11 Honeywell International Inc. Anisotropic magneto-resistance (AMR) gradiometer/magnetometer to read a magnetic track
DE102015114228A1 (de) * 2015-08-27 2017-03-02 Bundesdruckerei Gmbh Buchartiges Dokument, insbesondere Identifikationsdokument mit einem Transpondermodul und Verfahren zum Sichern von Daten in einem buchartigen Dokument
DE102015114227A1 (de) * 2015-08-27 2017-03-02 Bundesdruckerei Gmbh Buchartiges Dokument, insbesondere Identifikationsdokument, mit einem Transpondermodul und Verfahren zum Sichern von Daten in einem buchartigen Dokument
WO2017057650A1 (ja) * 2015-09-30 2017-04-06 旭化成エレクトロニクス株式会社 磁場検知装置

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AT362658B (de) * 1978-03-15 1981-06-10 Oesterr Nationalbank Papier, verfahren zur pruefung von papieren und vorrichtung zur durchfuehrung des pruefverfahrens
CH624220A5 (es) * 1978-04-04 1981-07-15 Radioelectrique Comp Ind
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DE3216830C2 (de) * 1981-05-09 1985-11-07 Laurel Bank Machines Co., Ltd., Tokio/Tokyo Banknoten-Ein/Ausgabe-Vorrichtung
JPS5829085A (ja) * 1981-07-24 1983-02-21 富士通株式会社 紙幣鑑別方式
FR2528970B1 (fr) * 1982-06-22 1985-09-27 Flonic Sa Dispositif de verification d'epaisseur de matieres dielectriques en feuille
US4523330A (en) * 1982-12-23 1985-06-11 Ncr Canada Ltd - Ncr Canada Ltee Banking system and method
US4588292A (en) * 1983-05-16 1986-05-13 Rowe International, Inc. Universal document validator
KR890002004B1 (ko) * 1984-01-11 1989-06-07 가부시끼 가이샤 도오시바 지폐류 판별장치
FR2559293B1 (fr) * 1984-02-03 1988-09-09 Commissariat Energie Atomique Nouvelle tete magnetique d'ecriture et de lecture pour enregistrement magnetique et son procede de fabrication
US4628194A (en) * 1984-10-10 1986-12-09 Mars, Inc. Method and apparatus for currency validation
CH661603A5 (en) * 1985-01-11 1987-07-31 Sodeco Compteurs De Geneve Apparatus for authenticating and identifying valuable documents, especially bank notes
GB8514391D0 (en) * 1985-06-07 1985-07-10 De La Rue Thomas & Co Ltd Authenticity sensing
JP2587822B2 (ja) * 1987-01-09 1997-03-05 旭化成工業株式会社 強磁性体磁気抵抗素子
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SE458315B (sv) * 1987-06-12 1989-03-13 Inter Innovation Ab Anordning foer detektering av dokument
DE3802121C2 (de) * 1988-01-26 1996-11-28 Nsm Ag Verfahren und Vorrichtung zur Bestimmung der Höhe eines Münzstapels in einem Münzrohr
US4988850A (en) * 1988-05-25 1991-01-29 Murata Mfg. Co., Ltd. Magnetoresistance element array
US5157245A (en) * 1988-06-29 1992-10-20 Murata Mfg. Co., Ltd. Magnetic sensor
US4899240A (en) * 1988-07-28 1990-02-06 Eastman Kodak Company Biasing for a UMR head

Also Published As

Publication number Publication date
DE69122260D1 (de) 1996-10-24
US5155643A (en) 1992-10-13
KR930702747A (ko) 1993-09-09
WO1992008226A1 (en) 1992-05-14
CA2095035A1 (en) 1992-05-01
KR100228837B1 (ko) 1999-11-01
CA2095035C (en) 2001-01-16
EP0555354B1 (en) 1996-09-18
EP0555354A1 (en) 1993-08-18
JPH06504391A (ja) 1994-05-19
JP3244503B2 (ja) 2002-01-07
EP0555354A4 (es) 1994-03-23
DE69122260T2 (de) 1997-03-27

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