EP2451651A1 - Procédé de fabrication d'un dispositif d'identification, dispositif obtenu et lecteur pour ce dispositif - Google Patents

Procédé de fabrication d'un dispositif d'identification, dispositif obtenu et lecteur pour ce dispositif

Info

Publication number
EP2451651A1
EP2451651A1 EP10739529A EP10739529A EP2451651A1 EP 2451651 A1 EP2451651 A1 EP 2451651A1 EP 10739529 A EP10739529 A EP 10739529A EP 10739529 A EP10739529 A EP 10739529A EP 2451651 A1 EP2451651 A1 EP 2451651A1
Authority
EP
European Patent Office
Prior art keywords
identification device
wavelength
protective layer
message
product
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.)
Withdrawn
Application number
EP10739529A
Other languages
German (de)
English (en)
Inventor
Alfredo Maglione
Paolo Zoccarato
Enrico Moreschi
Vittorio Guarnieri
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.)
Z2M Srl
Original Assignee
Z2M Srl
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 Z2M Srl filed Critical Z2M Srl
Priority to EP10739529A priority Critical patent/EP2451651A1/fr
Publication of EP2451651A1 publication Critical patent/EP2451651A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • G07D7/06—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 wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation
    • 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
    • G06K19/06009—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 with optically detectable marking
    • 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
    • G06K19/06009—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 with optically detectable marking
    • G06K19/06018—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 with optically detectable marking one-dimensional coding
    • G06K19/06028—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 with optically detectable marking one-dimensional coding using bar codes

Definitions

  • the present invention relates to a method of manufacturing an identification device and to the device obtained, in particular as a valid aid in opposing counterfeiting. State of the art
  • Holograms are marks capable of varying their image, shape or color according to the ambient light. This type of protective technology of a product cannot be reproduced by means of a color photocopier or high definition scanner. This is due to the fact that the light required by the instrument used for any attempt to counterfeit would make the image depicted on the hologram invisible or only partly visible.
  • Holograms are widely used as protective systems for brands and are used both in the private and public sectors. They are often used to prove the authenticity of a product, but can also be found on banknotes, credit cards and identity documents. Therefore, the authenticity of the identification device guarantees the authenticity of the product to which the identification device is applied.
  • nanobarcodes i.e. polymers which are shaped with lithographic techniques with nanoimprinting in a manner suitable to form three-dimensional barcodes on a substrate.
  • a high resolution CCD camera measures the reflection from the surface using a laser in the IR region.
  • Another technique involves the use of nanostructured barcodes of particles with submicrometer dimensions of metallic composition. These barcodes make use of the different reflectance of different metals subsequently analyzed under an optical microscope and with dedicated software. The devices contain thousands of metallic bars in a combination that generates a trillion unique codes.
  • An identification device of this kind comprises nanostructured metallic particles, a reader and a coating material such as silica.
  • QD Quality of light
  • a dense series of nanostructured materials are used in the field of the security; some materials have proved the capability of blocking UV radiations, thus depositing these materials so as to obtain an ink that is only fluorescent to ultraviolet light.
  • CNTs carbon nanotubes
  • these materials with fiber diameters of a few nanometers can be lithographed producing electrical resistances defined and measurable through a reader which identified objects with identical conductivity. Using a confocal laser microscope it has been found that it is possible to measure thicknesses of deposited films.
  • WO2008065991 discloses an EF powder particle composed of a substrate, an insulating layer on top of it, a metal layer, an insulating layer a second metal layer and a coating; the particle responding at a specific frequency.
  • EP1985462A1 discloses an information recording patch that allows authenticity discrimination.
  • the patch is formed from an adhesive layer, a metal layer, an intermediate layer and a protective layer.
  • a method for reading the message is also disclosed.
  • WO2008002450 discloses a bank-note scanning module connected to a processing unit in order to know if a scanned note is valid.
  • the scanner comprises a plurality of LEDs having different wavelength for reading and combining different sets of data.
  • the object of the present invention is to provide an identification device suitable to solve the aforesaid problem.
  • the present invention relates to an identification device which, according to claim 1 , comprises a substrate coated with at least one dielectric film on which at least one metallic layer is deposited, micromachined so as to represent a message, placing on top of said micromachined metallic layer an insulating protective layer transparent at least in one portion with respect to a first wavelength, characterized in that said protective layer is coated at least partly by an opacifying film, so that said portion of protective layer is transparent at a second wavelength.
  • An identification device thus described can be incorporated in a product to become the certificate of uniqueness and traceability thereof.
  • the present invention also relates to a method for manufacturing an identification device, according to claim 11.
  • the present invention also relates to a method of coding/decoding a message incorporated in said identification device, according to with claim 16.
  • the method of the present invention is particularly suitable and practical to produce relatively inexpensive identification devices useful to mark products so as to prevent counterfeiting thereof.
  • the complexity of production of these devices makes it extremely difficult or even impossible for the ill-intentioned to replicate the device.
  • the limited dimensions of the identification device make it versatile for any kind of application and assembly; moreover, the method of coding and decoding a message provides that at least one portion of the message can be used directly by the consumer, who can thus directly appraise the authenticity of the identification device and consequently of the product marked, while at least one further portion of the message can be used through specific reading means offering a further and more reliable level of security in the appraisal of said authenticity.
  • Said decoding system of said further portion of message provides for the use of a light source according to a predetermined wavelength and a video camera suitable to detect the relative radiation reflected from the identification device.
  • the sectors most interested in the system of the present invention can belong, for example, to the field of clothing, textiles, footwear and leather goods, as well as perfumes, beauty treatments, jewelry and eyewear, household cleaning products, food products alcoholic beverages, cosmetics, electronic products and all those industrial and handicraft products that require to be protected against counterfeiting.
  • Figs. 1 a and 1 b respectively represent a front view and a sectional view of a first embodiment of identification device in conformity with the present invention
  • Figs. 2a and 2b respectively represent a front view and a sectional view of a second embodiment of said identification device
  • Figure. 3 schematically represents a sectional view of application of the embodiment of Fig. 2 to a product.
  • An embodiment of the manufacturing method according to the present invention comprises the use of a substrate 1 or 1 ' or 1 ", for example silicon or quartz and the like, on a face of which the following is implemented:
  • dielectric film 2 or 2' or 2" of silicon oxides and/or silicon nitrides and/or titanium oxides, and/or polysilicon oxides can have a thickness ranging from a few nanometers up to tens of microns and can completely or partly coat said substrate; moreover, said dielectric film can be produced by vapor deposition, or by growth through oxidation techniques using oxygen or water vapor, or through techniques based on plasmas such as the technique known in English as PECVD ("Plasma-enhanced chemical vapor deposition”),
  • the metallization layer can be produced with the metals generally used in the field of microelectronics, such as aluminum, but also precious metals that can give added value to the product, such as gold, platinum, etc.,
  • UV lithography process on the metallization layer to determine structures of micrometer dimensions inside which a message can be integrated, such as a logo, an inscription, a code, biometric codes, alphanumeric codes or barcodes, etc., and combinations thereof,
  • a protective layer 4 or 4' or 4" at least partly transparent with respect to a predetermined wavelength which can be a layer of glass 4 or a polymer 4' or 4" and preferably photosensitive.
  • Special glass can be used, attached to the identification device using, for example, wafer bonding techniques, so as to obtain hermetic assembly without altering the features of the identification device.
  • This technology has the advantage of offering a noteworthy final result in relation to the low cost of the process used.
  • the thicknesses of the various layers forming a combination such as to define an identification code.
  • the deposition of various layers can be used as part of an identification code or message incorporated in the identification device.
  • the color is determined by the thickness of the material deposited or by the sum of the thicknesses thereof. Through optical measurements of interferometry it is possible to determine this thickness which is unequivocally determined by manufacture of the device.
  • UV radiation photolithography allows the production of geometries of a few microns which can then be transferred to the substrates used.
  • CAD applications are used to draw masks with micrometer geometries which are then used to treat a layer of photosensitive polymer. This mechanism has the undoubted advantage of producing designs, inscriptions and more in general a portion of message with micrometer resolution at a low cost.
  • Said inscription or brand or symbol in general 6 or 6' can therefore be of any nature and integrate, if necessary, a further code or symbol, etc..
  • An inscription or logo can, for example, be recognized with the naked eye, or by means of a simple magnifying glass, while the code inserted in a letter or in the logo, can be read and if necessary decoded by means of specific reading systems comprising video cameras connected to a computer.
  • Portions of the metallization layer can be eliminated to etch said message in the layer according to various UV lithography techniques.
  • the metalized layer can be coated with a photosensitive polymer, called positive or negative photoresist and, after applying an appropriate mask, irradiated with UV rays.
  • the product obtained is then immersed in an appropriate solution, generally at least weakly basic, to etch the parts made of soluble polymer in this solution. Therefore, the portions of metal film not protected by the photoresist are removed by heating the product or by chemical etching immersing it in a specific chemical bath.
  • the lithography process includes a micromachining process according to which a photopolymer film is deposited directly on said dielectric layer, the photopolymer is activated by means of irradiation and then the substrate is metalized to coat said photopolymer.
  • the semi-processed product is then immersed in a chemical solution which dissolves the parts of photopolymer sensitive to said chemical solution detaching the relative portions of metallization layer placed on top.
  • the identification device manufactured with the technologies described can be produced on various types of substrates, such as quartz, but in general on any substrate which can be processed with micromachining technologies.
  • Deposition of at least a further photopolymer film 7 having the function of filter with respect to a specific wavelength can be deposited on said protective layer, for example allowing said protective layer to be opacified so as to at least prevent viewing of the underlying layers in the spectrum of visible light, but which is transparent for other wavelengths, for example in the infrared or UV spectrum.
  • said filtering photopolymer film 7 is positioned on the inner face of the protective layer 4 when it is glass, while no other measure requires to be taken when the protective layer 4' is already a photopolymer.
  • the use of this technology prevents counterfeiters from reading the part hidden by the opacified portions of the protective layer 4 or 4', unless they are equipped with an appropriate reading system in conformity with the present invention.
  • replication of a similar identification device is in any case difficult to produce, while very economical if produced at industrial level.
  • Said protective layer can itself be a polymer having the function of a filter so as to produce the features described above, having the dual function of protection and filter.
  • the metalizations can be buried in the layers of silicon or produced on the back of the identification device, as shown in Figure 3, the substrate 1 ' being transparent for wavelengths greater than 1.2 microns.
  • the device can be attached to or partly incorporated in a product 100 having the metallization layer facing the product, as shown in Fig. 3, or it can be fully incorporated in the product, being in any case readable from the outside by means of appropriate radiation sources and appropriate sensors suitable to detect the relative reflected radiation.
  • the dielectric film or films can be selected in relation to the particular color characterizing them, so as to respect the color of a logo or brand of a manufacturer.
  • Integration of a detection system of a message according to the present invention at industrial level can be implemented according to techniques known to those skilled in the art.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

La présente invention concerne un procédé de fabrication d'un dispositif d'identification et le dispositif obtenu. Ledit dispositif d'identification est obtenu par des techniques de micro-usinage et comprend au moins un substrat constitué de quartz, de silicium ou d'un autre matériau adapté, une couche de métallisation micro-usinée de manière à contenir un message et une couche de protection constituée de verre ou de polymère, qui peut être au moins partiellement opacifiée afin de masquer une partie dudit message et d'empêcher sa lecture dans le spectre visible.
EP10739529A 2009-07-07 2010-07-07 Procédé de fabrication d'un dispositif d'identification, dispositif obtenu et lecteur pour ce dispositif Withdrawn EP2451651A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10739529A EP2451651A1 (fr) 2009-07-07 2010-07-07 Procédé de fabrication d'un dispositif d'identification, dispositif obtenu et lecteur pour ce dispositif

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP09425267A EP2279878A1 (fr) 2009-07-07 2009-07-07 Procédé de fabrication d'un dispositif d'identification, dispositif ainsi obtenu et lecteur pour ce dispositif
PCT/EP2010/059700 WO2011003931A1 (fr) 2009-07-07 2010-07-07 Procédé de fabrication d'un dispositif d'identification, dispositif obtenu et lecteur pour ce dispositif
EP10739529A EP2451651A1 (fr) 2009-07-07 2010-07-07 Procédé de fabrication d'un dispositif d'identification, dispositif obtenu et lecteur pour ce dispositif

Publications (1)

Publication Number Publication Date
EP2451651A1 true EP2451651A1 (fr) 2012-05-16

Family

ID=41478999

Family Applications (2)

Application Number Title Priority Date Filing Date
EP09425267A Withdrawn EP2279878A1 (fr) 2009-07-07 2009-07-07 Procédé de fabrication d'un dispositif d'identification, dispositif ainsi obtenu et lecteur pour ce dispositif
EP10739529A Withdrawn EP2451651A1 (fr) 2009-07-07 2010-07-07 Procédé de fabrication d'un dispositif d'identification, dispositif obtenu et lecteur pour ce dispositif

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP09425267A Withdrawn EP2279878A1 (fr) 2009-07-07 2009-07-07 Procédé de fabrication d'un dispositif d'identification, dispositif ainsi obtenu et lecteur pour ce dispositif

Country Status (2)

Country Link
EP (2) EP2279878A1 (fr)
WO (1) WO2011003931A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4844869B2 (ja) * 2006-02-03 2011-12-28 独立行政法人 国立印刷局 情報記録貼付体、印刷シート及びその真偽判別方法
US7584890B2 (en) * 2006-06-23 2009-09-08 Global Payment Technologies, Inc. Validator linear array
JP2008134815A (ja) * 2006-11-28 2008-06-12 Philtech Inc Ｒｆパウダーの提供方法およびｒｆパウダー含有液

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011003931A1 *

Also Published As

Publication number Publication date
EP2279878A1 (fr) 2011-02-02
WO2011003931A1 (fr) 2011-01-13

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