WO2001073685A1 - Rfid-label mit einem element zur einstellung der resonanzfrequenz - Google Patents
Rfid-label mit einem element zur einstellung der resonanzfrequenz Download PDFInfo
- Publication number
- WO2001073685A1 WO2001073685A1 PCT/CH2001/000085 CH0100085W WO0173685A1 WO 2001073685 A1 WO2001073685 A1 WO 2001073685A1 CH 0100085 W CH0100085 W CH 0100085W WO 0173685 A1 WO0173685 A1 WO 0173685A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rfid label
- substrate
- sticker
- label according
- conductive
- Prior art date
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
- G08B13/2414—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 inductive tags
-
- 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
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/0672—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with resonating marks
-
- 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
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/0723—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
- G06K19/0726—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs the arrangement including a circuit for tuning the resonance frequency of an antenna on the record carrier
-
- 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
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
-
- 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
- G08B13/2414—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 inductive tags
- G08B13/2417—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 inductive tags having a radio frequency identification chip
-
- 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
- G08B13/2431—Tag circuit details
Definitions
- the present invention relates to an RFID label according to the preamble of claim 1.
- RFID stands for the English term “radio frequency identification”.
- RFID labels like those considered here, generally include an electrical resonant circuit with a coil and a capacitor on a thin plastic substrate, and a very small integrated semiconductor circuit (chip), which gives the label a certain level of intelligence.
- the coil also acts as an antenna, so that the label on its resonance frequency, which is determined by the resonant circuit and lies in the "radio waves" area, can communicate with a remote transmitting and receiving station via "radio", so to speak.
- the energy required for the operation of the semiconductor circuit is obtained from the external energy received via the coil antenna Field
- the label therefore does not have its own energy source
- RFID labels can be used particularly for goods identification, for access security in a building complex or, for example, as a ski pass ticket
- RFID labels are usually subject to strict radio regulations, which are very narrow, for example, for their operation Allow limited frequency bands
- a frequency band which is often chosen for RFID labels, is eg 13 560 MHz, the width of this band being only +/- 7 kHz
- Such a known trimming method is, for example, shortening a capacitor with the aid of a laser (see US Pat. No. 3,947,934) or a punching or cutting tool (see WO 89/05984). This reduces the area of the capacitor and thus reduces the capacitance Reducing the capacitance affects the resonance frequency of the resonant circuit in such a way that the resonance frequency is increased
- the extent of the frequency change brought about by the additional element can also be chosen to be absolutely larger in comparison with the aforementioned known trimming methods, as a result of which the achievable accuracy of the frequency setting is increased
- a sticker with a conductive layer and an adhesive layer is used to increase the effective capacity of the resonant circuit in at least partial coverage with at least two conductive surfaces with different potential, which are on the same side of the substrate.
- the adhesive layer acts as an insulating and as a dielectric layer.
- it can also be attached to the opposite side of the substrate, with the substrate additionally acting as an insulating and as a dielectric conductive surfaces to which it is applied are chosen at least approximately at the potential of the two Capacitor plates are usually those areas that are also used for contacting the semiconductor circuit
- a sticker could also be conductively connected to a conductive area on one side of the substrate and otherwise arranged such that it is at least partially covered with another conductive area on the opposite side of the substrate. This also results in an increase in capacitance, provided the corresponding conductive area Surfaces are not at the same electrical potential
- a sticker with a conductive layer is applied in the area within the coil for the purpose of lowering the effective inductance of the resonant circuit.
- the magnetic field within the coil is influenced in this way in such a way that the inductance is reduced and a desired frequency increase results therefrom This measure is particularly effective if the sticker is offset within the coil from its center because the magnetic flux is denser here than in the center
- a local application can be carried out from an initially liquid or pasteous, later drying or hardening composition which has a high dielectric constant, the local application of this composition in the space between two Such an order creates an additional dielectric between the conductors, which leads to an increase in capacitance and thus a lowering of the frequency of the resonant circuit.
- the paste is easy to apply between the two conductors.
- the dielectric of the paste can vary depending on the desired frequency adjustment
- FIG. 4 also in section an alternative solution with an additionally applied local application made of a material with a high dielectric constant
- Fig. 1, 1 denotes a plastic film which, for example, consists of polyester and which is provided on both sides with conductive surfaces, preferably made of aluminum.
- conductive surfaces preferably made of aluminum.
- the conductive surfaces are two mutually parallel conductor tracks 2 and 3, a coil 4, a first corner surface 5, a first contact surface 6 and a connecting piece 7 are arranged on the front side of the substrate.
- the stippled conductors 8 and 9 are arranged on the rear side of the substrate.
- a first via 9 is provided on the rear side of the substrate, essentially congruent with the first corner surface 5, is also still a second corner surface 5 'and essentially congruent with the first contact surface 6, also a second contact surface 6' is formed between the first 5 and the second corner surface 5 'by means of a so-called compression, a first via 9 is provided. Another such via 10 is also between the two contact surfaces 6 and 6 '
- the coil 4 is connected at one end to the conductor track 3 and ends at the other end into the first corner surface 5. From there, the electrical connection continues via the via 9 to the second corner compartment 5 ', via the conductor track 8 to the further contact surface 6 'and from there to the conductor track 14, in the region of their free ends, the conductor tracks 3 and 14 cross over on different substrate sides and there form the plates of a capacitor 11, which in turn forms an oscillating circuit together with the coil 4
- the conductor 14 located on the back of the substrate and thus the rear capacitor plate is connected to the conductor 2 located on the front of the substrate, which accordingly also has the potential of the rear capacitor plate.
- the conductor 3 has this Potential of the front capacitor plate is connected to the two conductor tracks 2 and 3 and thus applied to the voltage of the capacitor 11 is a semiconductor circuit or chip 12
- the RFID label shown in FIG. 1 is also trimmed by a sticker 13 which is partially covered with the surfaces 2 and 3.
- the surfaces 2 and 3 are designed to be of sufficient length for this purpose.
- the sticker 13 has one with an adhesive layer 16 provided conductive layer 15 z made of aluminum (see FIG. 3 A or B) and, depending on the size of the conductive layer or its overlap with the conductive surfaces 2 and 3 of the label, locally causes an additional capacitance, which the capacitance of the Oscillating circuit increased This in turn results in a lowering of the frequency of the oscillating circuit 1
- the resonance circuit with the sticker 13 can in principle be made after the labels have been produced as such, the actual frequency of the resonance circuit first being determined, for example by frequency measuring cells. The actual frequency is then compared with a predetermined target frequency and a correction factor is derived therefrom The size of the sticker 13 is selected on the basis of this correction factor,
- the sticker 13 can either be applied directly to the two conductive surfaces 2 or 3, with only its adhesive layer acting as an insulation against these surfaces and as a dielectric, or it can be applied to the opposite side of the substrate, the substrate being additionally insulated and forming a dielectric
- FIG. 2 shows another possibility of frequency adaptation of the resonant circuit 1.
- a sticker 21 with a conductive layer, for example made of aluminum, is simply applied here somewhere on a free area inside the coil 4 without being covered by one of the conductive surfaces 21, the magnetic field within the coil 4 is changed. More specifically, the inductance L of the coil is reduced by the sticker 21. This has an increasing effect on the resonance frequency of the resonant circuit 1.
- the sticker 21 should preferably be attached to the coil center, since the effect on the magnetic flux in it Case is larger than than in the center of the coil 4 3 shows, under A and B in section, the two possibilities already described for attaching a sticker 13 to increase capacity in at least partially overlap with two conductor tracks 2 and 3, picture A corresponding to section II of FIG.
- a sticker 17 with a conductive layer 18 and a conductive adhesive layer 19 with a first conductive surface on the same substrate side is conductive and with a further conductive surface which is arranged on the opposite side of the substrate and has a different potential than the first surface, partially overlapped.
- the sticker 17 brings about an additional capacitance between the two conductive surfaces shown
- the local application 20 is made from a liquid, for example, applied mass with a high dielectric constant ⁇ , preferably in the range of ⁇ r 2-10, whereby these The mass solidifies later and / or dries and / or hardens. Due to the high dielectric constant of the mass used, like the stickers described above, the application causes a local increase in capacitance between the two conductor tracks, which increases the overall capacitance of the resonant circuit and has a negative effect on its resonance frequency that the extent of the change in capacity here is primarily determined by the length of the order 20 along the two conductor tracks
- the extent of the change in capacity basically also depends on the position that is selected for the sticker or the local order. It is most pronounced if the conductive surfaces with which the sticker is at least partially covered, or The potential between which the order is placed is as different as possible. With an RFID label of the type considered here, the greatest potential difference arises between the plates of the resonant circuit capacitor For this reason, the sticker 13 from FIG. 1 is also applied across the two conductor tracks 2 and 3, which have this maximum potential difference
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Automation & Control Theory (AREA)
- Computer Security & Cryptography (AREA)
- Electromagnetism (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Networks & Wireless Communication (AREA)
- Near-Field Transmission Systems (AREA)
- Details Of Aerials (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001571328A JP2003529163A (ja) | 2000-03-28 | 2001-02-07 | 共振周波数を調整する部材を有するrfidラベル |
EP01962432A EP1269412A1 (de) | 2000-03-28 | 2001-02-07 | Rfid-label mit einem element zur einstellung der resonanzfrequenz |
US10/239,793 US6796508B2 (en) | 2000-03-28 | 2001-02-07 | Rfid-label with an element for regulating the resonance frequency |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH594/00 | 2000-03-28 | ||
CH5942000 | 2000-03-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001073685A1 true WO2001073685A1 (de) | 2001-10-04 |
Family
ID=4522316
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CH2001/000085 WO2001073685A1 (de) | 2000-03-28 | 2001-02-07 | Rfid-label mit einem element zur einstellung der resonanzfrequenz |
Country Status (4)
Country | Link |
---|---|
US (1) | US6796508B2 (de) |
EP (1) | EP1269412A1 (de) |
JP (1) | JP2003529163A (de) |
WO (1) | WO2001073685A1 (de) |
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DE102007052125A1 (de) | 2007-10-31 | 2009-05-07 | Siemens Aktiengesellschaft | Prüfsystem für einen Baugruppenträger, Baugruppenträger mit einem Prüfsystem sowie Verfahren zum Prüfen eines Baugruppenträgers |
WO2009105370A1 (en) * | 2008-02-19 | 2009-08-27 | Avery Dennison Corporation | Rfid tag with releasable coupler |
KR100919984B1 (ko) * | 2002-10-18 | 2009-10-05 | 삼성테크윈 주식회사 | 스마트라벨 |
US7633394B2 (en) | 2004-12-01 | 2009-12-15 | Avery Dennison Corporation | RFID tags with modifiable operating parameters |
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Also Published As
Publication number | Publication date |
---|---|
US20030169153A1 (en) | 2003-09-11 |
EP1269412A1 (de) | 2003-01-02 |
US6796508B2 (en) | 2004-09-28 |
JP2003529163A (ja) | 2003-09-30 |
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