CA2095035A1 - Unshielded horizontal magnetoresistive head and method of fabricating same - Google Patents
Unshielded horizontal magnetoresistive head and method of fabricating sameInfo
- Publication number
- CA2095035A1 CA2095035A1 CA2095035A CA2095035A CA2095035A1 CA 2095035 A1 CA2095035 A1 CA 2095035A1 CA 2095035 A CA2095035 A CA 2095035A CA 2095035 A CA2095035 A CA 2095035A CA 2095035 A1 CA2095035 A1 CA 2095035A1
- Authority
- CA
- Canada
- Prior art keywords
- unshielded
- head
- magnetoresistive
- magnetoresistive head
- magnetoresistive 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title abstract 3
- 238000000034 method Methods 0.000 abstract 3
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
Abstract
An unshielded horizontal magnetoresistive head (1) for magnetic sensing and reading devices. The horizontal unshielded magnetoresistive head (1) is comprised of two magnetoresistive elements (2) separated by a gap (10), and a conductive cross member (3) which electrically connects the magnetoresistive elements (2) together and to a common electrical point such as system ground (4). A differential voltage sensing circuit (35) is connected across the magnetoresistive elements (2) for sensing voltage variations when magnetic data is sensed by the head (1). The present invention further facilitates a more simplified fabrication process which results in cost savings and more efficient fabrication methods and procedures.
Applications Claiming Priority (3)
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 |
US605,513 | 1990-10-30 | ||
PCT/US1991/007822 WO1992008226A1 (en) | 1990-10-30 | 1991-10-22 | Unshielded horizontal magnetoresistive head and method of fabricating same |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2095035A1 true CA2095035A1 (en) | 1992-05-01 |
CA2095035C CA2095035C (en) | 2001-01-16 |
Family
ID=24423975
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002095035A Expired - Fee Related CA2095035C (en) | 1990-10-30 | 1991-10-22 | Unshielded horizontal magnetoresistive head and method of fabricating same |
Country Status (8)
Country | Link |
---|---|
US (1) | US5155643A (en) |
EP (1) | EP0555354B1 (en) |
JP (1) | JP3244503B2 (en) |
KR (1) | KR100228837B1 (en) |
CA (1) | CA2095035C (en) |
DE (1) | DE69122260T2 (en) |
ES (1) | ES2093114T3 (en) |
WO (1) | WO1992008226A1 (en) |
Families Citing this family (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 (en) * | 1992-10-27 | 1994-05-20 | Sony Corp | Reproducing device for magneto-resistance effect type head |
US5358088A (en) * | 1992-11-25 | 1994-10-25 | Mars Incorporated | Horizontal magnetoresistive head apparatus and method for detecting magnetic data |
JPH077196A (en) * | 1992-12-29 | 1995-01-10 | Eastman Kodak Co | Magnetic field sensor and method of magnetic field detection |
IT1263970B (en) * | 1993-02-11 | 1996-09-05 | Mantegazza A Arti Grafici | ANTI-FALSIFICATION SAFETY DEVICE FOR DOCUMENTS IN GENERAL |
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 (en) * | 1996-11-27 | 2002-02-18 | キヤノン電子株式会社 | Coin identification device |
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 (en) * | 1999-12-01 | 2002-01-04 | Planhead Silmag P H S | PLANAR READING HEAD WITH MAGNETO-RESISTIVE ELEMENT |
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 (en) * | 2006-09-27 | 2008-04-10 | Fujitsu Ltd | Magnetoresistive effect element, its manufacturing method, and magnetic recording equipment using the same |
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 (en) * | 2015-08-27 | 2017-03-02 | Bundesdruckerei Gmbh | Book-type document, in particular identification document with a transponder module and method for saving data in a book-type document |
DE102015114227A1 (en) * | 2015-08-27 | 2017-03-02 | Bundesdruckerei Gmbh | Book-type document, in particular identification document, with a transponder module and method for saving data in a book-type document |
WO2017057650A1 (en) * | 2015-09-30 | 2017-04-06 | 旭化成エレクトロニクス株式会社 | Magnetic field detection device |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH581359A5 (en) * | 1974-10-01 | 1976-10-29 | Grey Lab Establishment | |
AT362658B (en) * | 1978-03-15 | 1981-06-10 | Oesterr Nationalbank | PAPER, METHOD FOR TESTING PAPERS AND DEVICE FOR CARRYING OUT THE TEST METHOD |
CH624220A5 (en) * | 1978-04-04 | 1981-07-15 | Radioelectrique Comp Ind | |
GB2098768B (en) * | 1981-04-13 | 1984-07-04 | Bank Of England The Governor & | Card readers |
DE3216830C2 (en) * | 1981-05-09 | 1985-11-07 | Laurel Bank Machines Co., Ltd., Tokio/Tokyo | Banknote input / output device |
JPS5829085A (en) * | 1981-07-24 | 1983-02-21 | 富士通株式会社 | Coin identification system |
FR2528970B1 (en) * | 1982-06-22 | 1985-09-27 | Flonic Sa | DEVICE FOR CHECKING THICKNESS OF DIELECTRIC SHEET MATERIAL |
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 (en) * | 1984-01-11 | 1989-06-07 | 가부시끼 가이샤 도오시바 | Distinction apparatus of papers |
FR2559293B1 (en) * | 1984-02-03 | 1988-09-09 | Commissariat Energie Atomique | NOVEL MAGNETIC WRITE AND READ HEAD FOR MAGNETIC RECORDING AND MANUFACTURING METHOD THEREOF |
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 (en) * | 1987-01-09 | 1997-03-05 | 旭化成工業株式会社 | Ferromagnetic magnetoresistive element |
US4851944A (en) * | 1987-02-17 | 1989-07-25 | Magnetic Peripherals Inc. | Ganged MR head sensor |
SE458315B (en) * | 1987-06-12 | 1989-03-13 | Inter Innovation Ab | DEVICE FOR THE DETECTION OF DOCUMENTS |
DE3802121C2 (en) * | 1988-01-26 | 1996-11-28 | Nsm Ag | Method and device for determining the height of a stack of coins in a coin tube |
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 |
-
1990
- 1990-10-30 US US07/605,513 patent/US5155643A/en not_active Expired - Lifetime
-
1991
- 1991-10-22 DE DE69122260T patent/DE69122260T2/en not_active Expired - Fee Related
- 1991-10-22 ES ES91920423T patent/ES2093114T3/en not_active Expired - Lifetime
- 1991-10-22 EP EP91920423A patent/EP0555354B1/en not_active Expired - Lifetime
- 1991-10-22 KR KR1019930701181A patent/KR100228837B1/en not_active IP Right Cessation
- 1991-10-22 WO PCT/US1991/007822 patent/WO1992008226A1/en active IP Right Grant
- 1991-10-22 CA CA002095035A patent/CA2095035C/en not_active Expired - Fee Related
- 1991-10-22 JP JP51861291A patent/JP3244503B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE69122260D1 (en) | 1996-10-24 |
JP3244503B2 (en) | 2002-01-07 |
DE69122260T2 (en) | 1997-03-27 |
EP0555354B1 (en) | 1996-09-18 |
US5155643A (en) | 1992-10-13 |
ES2093114T3 (en) | 1996-12-16 |
KR930702747A (en) | 1993-09-09 |
EP0555354A4 (en) | 1994-03-23 |
KR100228837B1 (en) | 1999-11-01 |
EP0555354A1 (en) | 1993-08-18 |
CA2095035C (en) | 2001-01-16 |
JPH06504391A (en) | 1994-05-19 |
WO1992008226A1 (en) | 1992-05-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2095035A1 (en) | Unshielded horizontal magnetoresistive head and method of fabricating same | |
EP0361781A3 (en) | Protective circuit for magnetoresistive element | |
US5282104A (en) | Magnetic reading device with read head matrix network | |
EP0294636A3 (en) | Mrs current sensor | |
WO2002073220A3 (en) | Method and apparatus for retaining a spring probe | |
WO2001084570A3 (en) | Magnetic element with insulating veils and fabricating method thereof | |
HK1013729A1 (en) | A magnetoresistive sensor and method of making the same | |
AU1421895A (en) | Current sensor including magnetic sensors | |
JPS57189320A (en) | Thin film magnetic head | |
US5166849A (en) | Horizontal magnetic head with hall effect and its embodiment method | |
EP1184845A3 (en) | Magnetoresistive sensor, magnetoresistive head, and magnetic recording/reproducing apparatus | |
MY120949A (en) | Head/suspension design having fewer signal wires and making the same | |
WO1998048291A3 (en) | Magnetic field sensor comprising a wheatstone bridge | |
US4754354A (en) | Ferrite film insulating layer in a yoke-type magneto-resistive head | |
MY104214A (en) | A thin film magnetic read/write head and method of forming the same. | |
US5306573A (en) | Magnetic device and process for production of magnetoresistive sensors according to this process | |
EP0363724A3 (en) | Connector for connecting an electrical circuit | |
CA2176294A1 (en) | Method and apparatus to sense changes in the state of a resin bed | |
WO1999006844A3 (en) | Magnetic current sensing and short circuit detection in plate structure | |
US5115364A (en) | Thin-film magnetic head having two magneto-resistant elements | |
EP0190520A3 (en) | Electrical connection for electronic circuits | |
GB1469692A (en) | Registering and recording device | |
KR960025349A (en) | Method for manufacturing magnetic head to form elements on substrate and substrate on which magnetic head is formed | |
JPH0246512A (en) | Thin film magnetic head | |
DE69105093T2 (en) | Hybrid circuit formed from two circuits, the conductor tracks of which are electrically connected by connecting balls. |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |