CA2041581A1 - Multi-layer thin-film eas marker - Google Patents

Multi-layer thin-film eas marker

Info

Publication number
CA2041581A1
CA2041581A1 CA2041581A CA2041581A CA2041581A1 CA 2041581 A1 CA2041581 A1 CA 2041581A1 CA 2041581 A CA2041581 A CA 2041581A CA 2041581 A CA2041581 A CA 2041581A CA 2041581 A1 CA2041581 A1 CA 2041581A1
Authority
CA
Canada
Prior art keywords
magnetic
films
film
magnetic thin
layer thin
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
Application number
CA2041581A
Other languages
French (fr)
Other versions
CA2041581C (en
Inventor
Chester Piotrowski
Charles Louis Bruzzone
Ching-Long Tsai
Jerome Watt Mcallister
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing 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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of CA2041581A1 publication Critical patent/CA2041581A1/en
Application granted granted Critical
Publication of CA2041581C publication Critical patent/CA2041581C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
    • G08B13/2408—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using ferromagnetic tags
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2428—Tag details
    • G08B13/2437—Tag layered structure, processes for making layered tags
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2428—Tag details
    • G08B13/2437—Tag layered structure, processes for making layered tags
    • G08B13/2442—Tag materials and material properties thereof, e.g. magnetic material details
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/90—Magnetic feature

Abstract

A marker for use in magnetic-type electronic article surveillance systems, comprising a substrate on which are deposited a plurality of high permeability, low coercive force magnetic thin-films, each being separated from an adjacent magnetic thin-film by a non-magnetic thin-film.
Each of the magnetic films have substantially the same permeability and coercive force, and the non-magnetic films are of a thickness to allow magnetostatic coupling while inhibiting exchange coupling. Accordingly, all of the magnetic thin-films reverse as a single entity and produce a sharp, readily distinguishable response.
CA002041581A 1990-06-01 1991-05-01 Multi-layer thin-film eas marker Expired - Fee Related CA2041581C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/531,835 1990-06-01
US07/531,835 US5083112A (en) 1990-06-01 1990-06-01 Multi-layer thin-film eas marker

Publications (2)

Publication Number Publication Date
CA2041581A1 true CA2041581A1 (en) 1991-12-02
CA2041581C CA2041581C (en) 2000-02-29

Family

ID=24119248

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002041581A Expired - Fee Related CA2041581C (en) 1990-06-01 1991-05-01 Multi-layer thin-film eas marker

Country Status (8)

Country Link
US (1) US5083112A (en)
EP (1) EP0459722B1 (en)
JP (1) JP3065712B2 (en)
AU (1) AU636030B2 (en)
CA (1) CA2041581C (en)
DE (1) DE69111516T2 (en)
ES (1) ES2075351T3 (en)
HK (1) HK1007617A1 (en)

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US5580664A (en) * 1992-12-23 1996-12-03 Minnesota Mining And Manufacturing Company Dual status thin-film eas marker having multiple magnetic layers
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US5767772A (en) * 1993-12-15 1998-06-16 Lemaire; Gerard Marker for an article which is detected when it passes through a surveillance zone
US5405702A (en) * 1993-12-30 1995-04-11 Minnesota Mining And Manufacturing Company Method for manufacturing a thin-film EAS and marker
US5751256A (en) * 1994-03-04 1998-05-12 Flexcon Company Inc. Resonant tag labels and method of making same
DE4416444C2 (en) * 1994-05-10 2003-06-26 Meto International Gmbh Security label strip
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FR2723228B1 (en) * 1994-07-26 1996-09-20 Bourgogne Grasset IMPROVED GAME TOKEN
FR2723231A1 (en) * 1994-07-26 1996-02-02 Bourgogne Grasset Ets GAME TOKEN
JPH11502973A (en) * 1995-03-29 1999-03-09 ミネソタ マイニング アンド マニュファクチャリング カンパニー Electromagnetic force absorbing composite
GB9506909D0 (en) * 1995-04-04 1995-05-24 Scient Generics Ltd Spatial magnetic interrogation system
JPH08287369A (en) * 1995-04-13 1996-11-01 Unitika Ltd Magnetic marker and manufacture of rolled product arraning magnetic markers in lateral direction
CA2175262A1 (en) * 1995-05-24 1996-11-25 Hugo Lievens Magnetic antipilferage tag
EP0744722B1 (en) * 1995-05-24 2001-07-18 Innovative Sputtering Technology N.V. (I.S.T.) Magnetic antipilferage tag
US5602528A (en) * 1995-06-20 1997-02-11 Marian Rubber Products Company, Inc. Theft detection marker and method
EP0839330B1 (en) * 1995-07-17 2002-07-24 Flying Null Limited Improvements relating to magnetic tags or markers
US7002475B2 (en) * 1997-12-31 2006-02-21 Intermec Ip Corp. Combination radio frequency identification transponder (RFID tag) and magnetic electronic article surveillance (EAS) tag
US5717381A (en) * 1995-12-21 1998-02-10 Eastman Kodak Company Copyright protection for photos and documents using magnetic elements
DE19604114A1 (en) * 1996-02-06 1997-08-07 Esselte Meto Int Gmbh Securing element for electronic article surveillance
DE19604746A1 (en) * 1996-02-09 1997-08-14 Esselte Meto Int Gmbh Securing element for electronic article surveillance
US5847649A (en) * 1996-03-25 1998-12-08 Minnesota Mining And Manufacturing Company EAS marker assemblies
US5843272A (en) 1996-03-25 1998-12-01 Minnesota Mining And Manufacturing Company Apparatus for automatically inserting markers into books
US5940362A (en) * 1996-08-19 1999-08-17 Sensormatic Electronics Corporation Disc device having a magnetic layer overweighing the information signal pattern for electronic article surveillance
US5899886A (en) * 1997-07-07 1999-05-04 Cosme; Edgar Z. Puncture safe needle assembly
US5768183A (en) * 1996-09-25 1998-06-16 Motorola, Inc. Multi-layer magnetic memory cells with improved switching characteristics
DE19737342A1 (en) * 1997-08-27 1999-03-04 Meto International Gmbh Identification element and method for producing an identification element
EP1437680A1 (en) * 1998-01-12 2004-07-14 Btg International Limited Magnetic data tagging
AU1978899A (en) * 1998-01-12 1999-07-26 Sentec Ltd. Magnetic data tagging
US5926095A (en) * 1998-03-18 1999-07-20 Sensormatic Electronics Corporation Transverse field annealing process to form E.A.S. marker having a step change in magnetic flux
US6154137A (en) 1998-06-08 2000-11-28 3M Innovative Properties Company Identification tag with enhanced security
DE19834367A1 (en) * 1998-07-30 2000-02-03 Meto International Gmbh Tape material, securing element and method for producing a securing element for electronic article surveillance
ES2198938T3 (en) * 1998-08-14 2004-02-01 3M Innovative Properties Company APPLICATION FOR A RADIO FREQUENCY IDENTIFICATION SYSTEM.
US6424262B2 (en) 1998-08-14 2002-07-23 3M Innovative Properties Company Applications for radio frequency identification systems
SG106669A1 (en) 1998-08-14 2004-10-29 3M Innovative Properties Co Applications for radio frequency identification systems
KR100699755B1 (en) * 1998-08-14 2007-03-27 쓰리엠 이노베이티브 프로퍼티즈 캄파니 Radio frequency identification systems applications
US6397661B1 (en) 1998-12-30 2002-06-04 University Of Kentucky Research Foundation Remote magneto-elastic analyte, viscosity and temperature sensing apparatus and associated methods of sensing
US6541853B1 (en) * 1999-09-07 2003-04-01 Silicon Graphics, Inc. Electrically conductive path through a dielectric material
FR2805067B1 (en) 2000-02-15 2003-09-12 Bourgogne Grasset ELECTRONIC CHIP TOKEN AND METHODS OF MANUFACTURING SUCH A TOKEN
RU2166751C1 (en) * 2000-03-09 2001-05-10 Никитин Петр Иванович Process of analysis of mixture of biologic and/or chemical components with use of magnetic particles and device for its implementation
US6688162B2 (en) 2000-10-20 2004-02-10 University Of Kentucky Research Foundation Magnetoelastic sensor for characterizing properties of thin-film/coatings
US6639402B2 (en) 2001-01-31 2003-10-28 University Of Kentucky Research Foundation Temperature, stress, and corrosive sensing apparatus utilizing harmonic response of magnetically soft sensor element (s)
US7017820B1 (en) 2001-02-08 2006-03-28 James Brunner Machine and process for manufacturing a label with a security element
US20040069851A1 (en) * 2001-03-13 2004-04-15 Grunes Mitchell B. Radio frequency identification reader with removable media
US20050032151A1 (en) * 2001-06-05 2005-02-10 Eisenberg Peter M. Methods of managing the transfer and use of data
US7588185B2 (en) * 2001-06-07 2009-09-15 3M Innovative Properties Company RFID data collection and use
FR2825821B1 (en) * 2001-06-11 2003-08-22 Arjo Wiggins Sa REMOTE REUSABLE ADHESIVE SECURITY ARTICLE
WO2002103648A1 (en) * 2001-06-14 2002-12-27 Magnum Magnetics Printable magnetic sheet
KR20120105485A (en) 2009-12-02 2012-09-25 쓰리엠 이노베이티브 프로퍼티즈 컴파니 Multilayer emi shielding thin film with high rf permeability
FR2986157B1 (en) * 2012-02-01 2015-04-03 Pascal Duthilleul MULTILAYER ENVELOPE DEVICE FOR ATTENUATING ELECTROMAGNETIC WAVES.
CA2937878C (en) 2014-01-24 2022-08-23 The Regents Of The University Of Michigan Frame-suspended magnetoelastic resonators
CN108010718B (en) * 2016-10-31 2020-10-13 北京北方华创微电子装备有限公司 Magnetic thin film deposition chamber and thin film deposition equipment
US11658638B2 (en) 2019-08-30 2023-05-23 The Regents Of The University Of Michigan Magnetoelastic resonator and method of manufacturing same
CN111613718B (en) * 2020-05-26 2023-05-09 中国人民解放军国防科技大学 Enhanced film magnetism adjustable structure

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US4112503A (en) * 1977-04-08 1978-09-05 Sperry Rand Corporation Stripe domain propagation using contiguous bicore disk file structure
US4298862A (en) * 1979-04-23 1981-11-03 Allied Chemical Corporation Amorphous antipilferage marker
US4356523A (en) * 1980-06-09 1982-10-26 Ampex Corporation Narrow track magnetoresistive transducer assembly
US4698711A (en) * 1985-10-02 1987-10-06 International Business Machines Corporation Simplified, shielded twin-track read/write head structure
ES2040343T3 (en) * 1987-06-08 1993-10-16 Esselte Meto International Gmbh MAGNETIC DEVICES.
US4980670A (en) * 1987-11-04 1990-12-25 Sensormatic Electronics Corporation Deactivatable E.A.S. marker having a step change in magnetic flux
US4825197A (en) * 1988-02-01 1989-04-25 Minnesota Mining And Manufacturing Company Dual status magnetic marker having magnetically biasable flux collectors for us in electronic article surveillance systems
GB8817855D0 (en) * 1988-07-27 1988-09-01 Emi Plc Thorn Electromagnetic identification system

Also Published As

Publication number Publication date
US5083112A (en) 1992-01-21
JP3065712B2 (en) 2000-07-17
AU7643391A (en) 1991-12-05
AU636030B2 (en) 1993-04-08
JPH04232594A (en) 1992-08-20
HK1007617A1 (en) 1999-04-16
ES2075351T3 (en) 1995-10-01
EP0459722B1 (en) 1995-07-26
DE69111516D1 (en) 1995-08-31
DE69111516T2 (en) 1996-03-28
CA2041581C (en) 2000-02-29
EP0459722A1 (en) 1991-12-04

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