DE68923036T2 - Struktur aus dünnen Schichten mit magnetischen und farbverändernden Eigenschaften. - Google Patents

Struktur aus dünnen Schichten mit magnetischen und farbverändernden Eigenschaften.

Info

Publication number
DE68923036T2
DE68923036T2 DE68923036T DE68923036T DE68923036T2 DE 68923036 T2 DE68923036 T2 DE 68923036T2 DE 68923036 T DE68923036 T DE 68923036T DE 68923036 T DE68923036 T DE 68923036T DE 68923036 T2 DE68923036 T2 DE 68923036T2
Authority
DE
Germany
Prior art keywords
magnetic
thin layers
color changing
changing properties
metal
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
DE68923036T
Other languages
English (en)
Other versions
DE68923036D1 (de
DE68923036T3 (de
Inventor
Roger Phillips
Paul G Coombs
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.)
Flex Products Inc
Original Assignee
Flex Products 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=22698739&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE68923036(T2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Flex Products Inc filed Critical Flex Products Inc
Publication of DE68923036D1 publication Critical patent/DE68923036D1/de
Publication of DE68923036T2 publication Critical patent/DE68923036T2/de
Application granted granted Critical
Publication of DE68923036T3 publication Critical patent/DE68923036T3/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/28—Interference filters
    • G02B5/285—Interference filters comprising deposited thin solid films
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/0015—Pigments exhibiting interference colours, e.g. transparent platelets of appropriate thinness or flaky substrates, e.g. mica, bearing appropriate thin transparent coatings
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/08—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means
    • G06K19/10—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/42—Magnetic properties
    • 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
    • Y10S283/00—Printed matter
    • Y10S283/902—Anti-photocopy
DE68923036T 1988-05-03 1989-04-28 Struktur aus dünnen Schichten mit magnetischen und farbverändernden Eigenschaften. Expired - Lifetime DE68923036T3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/189,779 US4838648A (en) 1988-05-03 1988-05-03 Thin film structure having magnetic and color shifting properties

Publications (3)

Publication Number Publication Date
DE68923036D1 DE68923036D1 (de) 1995-07-20
DE68923036T2 true DE68923036T2 (de) 1995-10-19
DE68923036T3 DE68923036T3 (de) 1999-06-24

Family

ID=22698739

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68923036T Expired - Lifetime DE68923036T3 (de) 1988-05-03 1989-04-28 Struktur aus dünnen Schichten mit magnetischen und farbverändernden Eigenschaften.

Country Status (9)

Country Link
US (1) US4838648A (de)
EP (1) EP0341002B2 (de)
JP (1) JP2960434B2 (de)
AT (1) ATE123888T1 (de)
CA (1) CA1319052C (de)
DE (1) DE68923036T3 (de)
ES (1) ES2072901T5 (de)
GR (2) GR3017135T3 (de)
HK (1) HK1005756A1 (de)

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EP0341002B1 (de) 1995-06-14
JPH0216044A (ja) 1990-01-19
EP0341002A2 (de) 1989-11-08
DE68923036D1 (de) 1995-07-20
GR3017135T3 (en) 1995-11-30
US4838648A (en) 1989-06-13
EP0341002B2 (de) 1999-02-24
ES2072901T5 (es) 1999-05-01
ATE123888T1 (de) 1995-06-15
HK1005756A1 (en) 1999-01-22
ES2072901T3 (es) 1995-08-01
CA1319052C (en) 1993-06-15
EP0341002A3 (en) 1990-08-01
JP2960434B2 (ja) 1999-10-06
DE68923036T3 (de) 1999-06-24
GR3029733T3 (en) 1999-06-30

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