JP2007026145A - Non-contact type data carrier device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-contact type data carrier using a temperature fuse for acquiring a desired temperature change, capable of certainly acquiring cutoff of the temperature fuse. <P>SOLUTION: This data carrier device has an LED (Light Emitting Diode) circuit part disposed with an LED, changing a state of the LED from an extinction state of the LED before the cutoff to a lighting state, or from the lighting state of the LED before the cutoff to the extinction state by the cutoff of a temperature cutoff element such as the temperature fuse. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a non-contact type data carrier device, and more particularly to a non-contact type data carrier device having a temperature change detection unit using a temperature cutting element such as a thermal fuse as a sensor.

In recent years, IC cards have been gradually spread from the aspect of information confidentiality, and in recent years, non-contact type IC cards that exchange information without contacting a reader / writer have been proposed. A system in which signal exchange with an apparatus or signal exchange and power supply is performed by electromagnetic waves is being put into practical use.
Under these circumstances, various types of non-contact IC tags in the form of sheets or bills, in which ICs with data are connected to antenna coils, have been recently proposed and attached to products and packaging boxes to prevent shoplifting, logistics It has come to be used for systems and product management.
Of course, a simple resonance tag having no IC is also used to detect the presence of an article.

Any of the simple resonance tags and IC tags that do not have the above-described ICs senses the presence of an article and identifies the article, and does not capture changes in external factors.
In the case of a resonance tag having an individually set resonance frequency, the presence of an article is detected and the article is identified, and a change in external factors is not captured.
In order to grasp the change in the temperature of the article, for example, the use of a button-type temperature monitoring device incorporating a temperature sensor and CPU, memory and battery is conceivable. It is expensive at several thousand yen and has a short life because it runs on an internal battery.
In addition, there is a thermo label that changes color due to temperature change, but there is no automatic individual identification function, and visual confirmation is required one by one, and detection is not easy.
Thus, conventionally, the tag is exclusively used for sensing the presence of an article and identifying the article, and in order to grasp changes in the environment such as the temperature of the article, it is expensive like a temperature monitor device, Or, since it takes time to handle like a thermo label, it has not been used to grasp the environmental change of an article.

Under such circumstances, recently, an IC tag with a temperature change detection function (hereinafter also referred to as a sensor tag) in which a temperature sensor having no power source is arranged has come out, for example, Japanese Patent Laid-Open No. 10-227702 (Patent Document 1). )), A resonant circuit incorporating a ferroelectric capacitor formed using a ferroelectric material with a large temperature dependence as a capacitive element is constructed, and the temperature dependence of the capacitance of the ferroelectric capacitor in the previous period Thus, there is a configuration in which the temperature is measured by detecting the resonance frequency of the resonance circuit of the resonance circuit that changes.
However, since such a sensor tag is used in combination with a measuring instrument such as a dip meter that measures the resonance frequency, for example, in an environment where there is no measuring instrument in the surroundings, such as transshipment of luggage, the external environment ( There was a drawback that it was not possible to guarantee that the temperature was maintained normally. Conventionally, as a frequency identification method of a resonance tag, a dip meter method, an echo wave detection method, and the like are known as described in JP 2000-49655 A (Patent Document 2). JP 2000-49655 A

As described above, a sensor tag with a temperature change detection function that does not have a conventional power supply is used in combination with a measuring instrument such as a dip meter that measures the resonance frequency. It could not be guaranteed whether or not there was a predetermined temperature environment change, and a response was required.
In contrast, the applicant of the present application discloses a non-contact type communication responder such as an IC tag having a resonance circuit set so that a resonance frequency is changed by cutting a thermal fuse due to a temperature change. No. 0 5 −1 5 7 4 8 5 (Patent Document 3).
In this case, since a predetermined temperature environment change is left as a thermal fuse cut, it is possible to reliably know whether or not a desired environment change has occurred.
In such a non-contact type communication responder using a thermal fuse, whether or not the thermal fuse is cut is determined by a difference in resonance frequency, that is, a difference in communication distance.
However, since the deterioration of the performance of the tag itself can be considered as a cause of the difference in the resonance frequency and the communication distance, there is a problem that it is impossible to determine whether the temperature sensor is disconnected or the performance of the tag itself is deteriorated.
JP 2 0 0 5 −1 5 7 4 8 5

As described above, recently, in order to grasp the presence or absence of a desired temperature change, a non-contact type data carrier using a thermal fuse has come to be used. In, the presence or absence of the thermal fuse is determined by the difference in the resonance frequency, that is, the difference in the communication distance, but as a cause of the difference in the resonance frequency and the difference in the communication distance, the tag itself may be degraded in performance, There has been a demand for a non-contact type data carrier using a thermal fuse that can reliably grasp when the thermal fuse is cut.
The present invention corresponds to this, and is a non-contact type data carrier using a thermal fuse for grasping the presence or absence of a desired temperature change, and can reliably grasp whether or not the thermal fuse is cut. Is to provide a type of data carrier.

A non-contact type data carrier device of the present invention has a built-in IC chip having a memory, communicates signals with an external circuit via an antenna circuit, and receives energy supply from the external circuit. The data carrier is an LED (Light Emitting Diode), and the temperature cutting element is disconnected, so that the LED before turning off is turned off or turned off, or the LED before turning off is turned off. It is characterized by having an LED circuit section that changes the state to a state.
And it is said non-contact-type data carrier apparatus, Comprising: The said temperature cutting element is a temperature fuse cut | disconnected at predetermined temperature, It is characterized by the above-mentioned.
Any one of the above non-contact type data carrier devices, characterized in that the temperature cutting element and the LED are connected in series, and these are connected in parallel to the IC chip. To do.
Alternatively, any one of the above non-contact type data carrier devices, wherein the temperature cutting element and the LED are connected in parallel, and these are connected in series to the IC chip. It is a feature.
Also, any one of the above non-contact type data carrier devices, wherein the temperature cutting element and the LED are connected in series, and these are connected in parallel to the IC chip. And a predetermined second circuit state in which the temperature cutting element and the LED are connected in parallel and are connected in series to the IC chip. Further, one or more circuit elements or circuit members for switching the circuit state are provided.
Also, any one of the above non-contact type data carrier devices, wherein a resonance frequency adjusting capacitor is connected.
Also, any one of the above non-contact type data carrier devices is an IC tag.

Here, the temperature cutting element is in a non-cutting state (also referred to as a conduction state or an off state) at a normal use temperature, and is also in a cutting state (also referred to as a non-conduction state or an off state) above a predetermined temperature above the normal temperature. ).
The normal use temperature means a temperature in a temperature range in which the non-contact type data carrier is normally used, and when used at normal temperature, this corresponds to normal temperature.
An example of the external circuit is a reader / writer.
The non-contact type data carrier here includes an IC tag, an IC card, an information recording medium, an RFID, an RF tag, a resonance tag, and the like.

(Function)
The non-contact type data carrier device of the present invention is a non-contact type data carrier using a temperature cutting element such as a temperature fuse for grasping the presence or absence of a desired temperature change by adopting such a configuration. Therefore, it is possible to provide a non-contact type data carrier that can surely grasp the presence or absence of the cutting state of the temperature cutting element.
More specifically, an LED circuit unit is provided in which an LED is arranged, and the state of the LED before being cut is changed from being turned off to being turned on, or is changed from being turned on to being turned off by cutting the temperature cutting element. Thus, when the temperature cutting element is cut, it is possible to reliably check whether or not the temperature cutting element is cut by turning on the LED.
Examples of the temperature cutting element include a thermal fuse that cuts at a predetermined temperature.
Specifically, the temperature cutting element and the LED are connected in series, and these are connected in parallel to the IC chip, or the temperature cutting element and the LED are connected in parallel. Are connected in parallel, and these are connected in series to the IC chip. In the case of these forms, the circuit configuration can be simplified.
Furthermore, the temperature cutting element and the LED are connected in series, and the state of the predetermined first circuit in which these are connected in parallel to the IC chip, and the temperature cutting element and the LED are connected in parallel. One or more circuit elements or circuit members for switching the circuit state so that they can be appropriately switched between a predetermined second circuit state that is connected and connected in series to the IC chip. The form of invention of Claim 5 which has arrange | positioned is raised, and, thereby, the freedom degree of the use can be enlarged.
Further, by adopting the form of the invention of claim 6 to which a capacitor for adjusting the resonance frequency is connected, reliable signal exchange with an external circuit (reader / writer) is enabled.
In particular, it is effective in the case of an IC tag.

  As described above, the present invention is a non-contact type data carrier using a temperature cutting element such as a temperature fuse for grasping the presence or absence of a desired temperature change. A non-contact data carrier that can be grasped can be provided.

A non-contact type data carrier device according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1A is a schematic circuit configuration diagram of a first example of an embodiment of a non-contact type data carrier device of the present invention, and FIG. 1B is an example of a circuit unit shown in FIG. 2A is a schematic circuit configuration diagram of a second example of the embodiment of the non-contact type data carrier device of the present invention, and FIG. 2B is a schematic diagram of FIG. 2A. FIG. 3 is a schematic circuit configuration diagram of a third example of the embodiment of the non-contact type data carrier device of the present invention.
Although not shown in FIGS. 1 to 3, a capacitor for adjusting the resonance frequency is connected.
1 to 3, 100 is an IC tag (also called a data carrier device), 101 is a base material, 110 is an IC chip, 111 is an analog RF unit, 112 is an IC tag control circuit unit, 113 is a memory unit, and 120 is Antenna coil (also referred to as an antenna circuit), 125 a connection portion (also referred to as a jumper), 130 an LED circuit portion, 131 an LED, 132 a thermal fuse (also referred to as a temperature disconnecting element), 133 a wiring, and 200 an IC tag ( (Also called a data carrier device), 201 is a base material, 210 is an IC chip, 211 is an analog RF unit, 212 is an IC tag control circuit unit, 213 is a memory unit, 220 is an antenna coil (also called an antenna circuit), and 225 is a connection (Also called a jumper), 230 is an LED circuit part, 231 is an LED, 232 is a thermal fuse (also called a temperature cutting element) ) 233 is a wiring, 300 is an IC tag (also called a data carrier device), 301 is a base material, 310 is an IC chip, 311 is an analog RF unit, 312 is an IC tag control circuit unit, 313 is a memory unit, and 320 is an antenna A coil (also referred to as an antenna circuit), 330 is an LED circuit unit, 331 is an LED, 332 is a thermal fuse (also referred to as a temperature cutting element), 333 is a wiring, and S1 to S4 are switches.

First, a first example of an embodiment of a non-contact type data carrier device of the present invention will be described with reference to FIG.
The non-contact type data carrier device of the first example incorporates an IC chip 110 having a memory 113, communicates signals with an external circuit via an antenna circuit 120, and passively receives energy supply from the external circuit. This type of IC tag 100 has a resonance frequency of 13.56 MHz in accordance with the proximity type of the ISO / IEC15693 standard.
Then, the LED 131 is arranged, and the temperature fuse 132 that cuts at a predetermined temperature T1 is used as a temperature cutting element, and the temperature fuse 132 and the LED 131 are connected in series, and these are connected in parallel to the IC chip 110. The LED circuit unit connected to the LED is provided, and the state can be changed from the lighting state of the LED before cutting to the extinguishing state by cutting the thermal fuse 132.
With such a configuration, it is possible to ascertain whether or not the temperature has changed to T1 with a simple circuit configuration without performing signal communication with the external circuit.
It is possible to know the presence or absence of a temperature change of an article attached with or incorporating an IC tag of this example.
Here, communication with an external circuit is performed by adjusting with a resonance frequency adjusting capacitor (not shown).

As the base material 101, a base material for a PC board is preferable in terms of the arrangement of the LED 131 and the thermal fuse 132, and examples thereof include glass epoxy, PET (polyethylene terephthalate), and the like, but are not limited thereto.
As a metal material for forming the antenna coil 120 and the wiring 133, here, a copper layer having a thickness of 10 to 50 μm is used from the viewpoint of electrical characteristics, but is not limited thereto.
Other examples include an Al layer having a thickness of 15 to 50 μm from the viewpoint of electrical characteristics.
Further, as the IC chip 110, one having a size of 1.0 mm × 0.9 mm square and a thickness of about 150 μm is usually used.
The LED 131 is preferably small and light and has a low driving voltage.
In this example, since the signal communication with the external circuit is performed at 13.56 MHz, it is necessary to be able to drive the LED 131 at the frequency of the communication with the external circuit.
Although the thing cut | disconnected by the predetermined temperature T1 is selected as the thermal fuse 132, For example, the thermal fuse using a silver paste and a heat shrink film is mentioned.

A method for manufacturing the non-contact type data carrier device (IC tag) 100 of this example will be briefly described below.
First, the antenna coil 120 and the wiring 133 are formed on the base material 101.
Normally, a plurality of IC tags are formed in an imposition state, and then formed into individual pieces to obtain each IC tag having the antenna coil 120 and the wiring 133 formed thereon. .
Again, the following processing is performed in an imposition state.
The formation of the antenna coil 120 and the wiring 133 is in accordance with a normal method for manufacturing a wiring board. In general, a method of selectively plating the copper layer for forming the antenna coil 120 and the wiring 133 on one surface of the substrate 101. (Additive method), a method of selectively etching and forming a rolled copper thin film laminated on one surface of the base material 101 (sub-trackive method), or plating formation on the entire surface or part of one surface of the base material 101. Or a method of selectively etching a copper layer (semi-additive method).
These methods are known and will not be described here.
A connection portion (also referred to as a jumper) 125 that connects the end portions of the antenna coil 120 is formed.
In this example, the wiring portion that crosses over the antenna coil 120 via the insulating layer is formed as the connection portion (also referred to as a jumper) 125, but the connection means is not limited to this.
For example, a through-hole connection generally used for a PC board may be used.
Next, the IC chip 110, the LED 131, and the thermal fuse 132 are each connected to predetermined wiring.
Here, the connection is made with solder.
In this way, a plurality of impositions are formed and then separated.
In addition, a protective film and a protective layer are disposed in a predetermined region as necessary.

First, a second example of the embodiment of the non-contact type data carrier device of the present invention will be described with reference to FIG.
Similar to the first example, the non-contact type data carrier device of the second example incorporates an IC chip 210 having a memory 213, communicates signals with an external circuit via an antenna circuit 220, and externally A passive type IC tag 200 that receives energy supply from a circuit and has a resonance frequency of 13.56 MHz according to the proximity type of the ISO / IEC15693 standard.
Then, a temperature fuse 232 that cuts at a predetermined temperature T2 is used as a temperature cutting element, the temperature fuse 232 and the LED 231 are connected in parallel, and these are connected in series to the IC chip 210. The circuit portion is provided, and the state can be changed from the unlit state of the pre-cut LED to the lit state by cutting the thermal fuse 232.
With such a configuration, it is possible to grasp whether or not the temperature has changed to T2 with a simple circuit configuration without performing signal communication with the external circuit.
It is possible to know the presence or absence of a temperature change of an article attached with or incorporating an IC tag of this example.
As in the first example, in this example, the signal 231 is communicated with an external circuit at 13.56 MHz, and thus it is necessary to be able to drive the LED 231 at this frequency.
As the thermal fuse 232, one that is cut at a predetermined temperature T2 is selected.
About each part of a 2nd example, the thing similar to a 1st example is applicable, and these description is abbreviate | omitted here.
In addition, a manufacturing method similar to that of the first example can be applied, and description thereof is omitted here.
In this case as well, communication is performed with an external circuit by adjusting with a resonance frequency adjusting capacitor (not shown).

First, a third example of the embodiment of the non-contact type data carrier device of the present invention will be described with reference to FIG.
Similar to the first example and the second example, the non-contact type data carrier device of the third example includes the IC chip 310 having the memory 313 in the non-contact type data carrier device of the first example. The passive type IC tag 300 communicates with an external circuit through the antenna circuit 320 and receives energy supply from the external circuit, and has a resonance frequency of 13.56 MHz according to the proximity type of the ISO / IEC15693 standard. belongs to.
In the third example, a temperature fuse 332 and an LED 331 are connected in series, and the state of a predetermined first circuit in which these are connected in parallel to the IC chip 310, and the temperature fuse 332 and the LED 331 are connected. Are connected in parallel, and the four circuit state switching four circuit states are switched so that the predetermined second circuit state in which these are connected in series to the IC chip 310 can be appropriately switched. Switches S1 to S4 are provided.
In the case of the first circuit state, as in the first example, the thermal fuse 332 is cut, so that the lighting state is turned off.
In this case, the switches S2 and S3 are on (conductive state), and the switches S1 and S4 are off (non-conductive state).
In the case of the second circuit state, as in the second example, the thermal fuse 332 is cut to change the lighted state to the lighted state.
In this case, the switches S1 and S4 are on (conductive state), and the switches S2 and S3 are off (non-conductive state).
With such a configuration, it is possible to grasp whether or not the temperature has changed to T3 with a simple circuit configuration without performing signal communication with the external circuit.
It is possible to know the presence or absence of a temperature change of an article attached with or incorporating an IC tag of this example.
Similar to the first example and the second example, in the case of this example as well, since the signal communication with the external circuit is performed at 13.56 MHz, it is necessary to be able to drive the LED 331 at this frequency.
As the thermal fuse 332, one that is cut at a predetermined temperature T3 is selected.
About each part of a 3rd example, the thing similar to a 1st example is applicable, and these description is abbreviate | omitted here.
In addition, a manufacturing method similar to that of the first example can be applied, and description thereof is omitted here.
Here, communication with an external circuit is performed by adjusting with a resonance frequency adjusting capacitor (not shown).

The first to third examples are only examples, and the present invention is not limited to these examples.
For example, in the above example, one thermal fuse is used and one LED is used, but the present invention is not limited to this.
By using a plurality of temperature fuses and a plurality of LEDs and making a difference in the cutting temperature of each temperature fuse, it is determined whether or not the temperature range that each IC tag has passed is a predetermined temperature range. It is possible to grasp without performing signal communication with an external circuit.
In the above example, the resonance frequency is set to 13.56 MHz in accordance with the proximity type of the ISO / IEC15693 standard, but this is not limitative.
Moreover, although the above example is for an IC tag, the present invention is not limited to this.
For example, using an LED and a thermal fuse on an IC card, information recording medium, RFID, RF tag, resonance tag, etc., as in the above example, the presence or absence of temperature change can be grasped by turning on or off the LED. good.

FIG. 1A is a schematic circuit configuration diagram of a first example of an embodiment of a non-contact type data carrier device of the present invention, and FIG. 1B is an example of a circuit unit shown in FIG. It is the top view which showed. FIG. 2A is a schematic circuit configuration diagram of a second example of the embodiment of the non-contact type data carrier device of the present invention, and FIG. 2B is an example of the circuit unit shown in FIG. It is the top view which showed. FIG. 3 is a schematic circuit configuration diagram of a third example of the embodiment of the contactless data carrier apparatus of the present invention.

Explanation of symbols

100 IC tag (also called data carrier device)
101 Substrate 110 IC chip 111 Analog RF unit 112 IC tag control circuit unit 113 Memory unit 120 Antenna coil (also referred to as antenna circuit)
125 connection (also called jumper)
130 LED circuit part 131 LED
132 Thermal fuse (also called temperature cutting element)
133 Wiring 200 IC tag (also called data carrier device)
201 substrate 210 IC chip 211 analog RF unit 212 IC tag control circuit unit 213 memory unit 220 antenna coil (also referred to as antenna circuit)
225 Connection (also called jumper)
230 LED circuit part 231 LED
232 Thermal fuse (also called temperature cutting element)
233 Wiring 300 IC tag (also called data carrier device)
301 Substrate 310 IC chip 311 Analog RF unit 312 IC tag control circuit unit 313 Memory unit 320 Antenna coil (also referred to as antenna circuit)
330 LED circuit part 331 LED
332 Thermal fuse (also called temperature cutting element)
333 wiring S1-S4 switch

Claims (7)

  A passive non-contact data carrier that contains an IC chip with memory, communicates signals with an external circuit via an antenna circuit, and receives energy from the external circuit. The LED circuit unit is provided to change the state of the pre-cutting LED from the unlit state to the lit state, or the pre-cutting LED from the lit state to the unlit state by cutting the temperature cutting element. Non-contact type data carrier device.   2. The non-contact type data carrier device according to claim 1, wherein the temperature cutting element is a thermal fuse that cuts at a predetermined temperature.   3. The non-contact type data carrier device according to claim 1, wherein the temperature cutting element and the LED are connected in series and are parallel to the IC chip. A non-contact type data carrier device connected to   3. The non-contact type data carrier device according to claim 1, wherein the temperature cutting element and the LED are connected in parallel, and are connected in series to the IC chip. A non-contact type data carrier device connected to   The non-contact type data carrier device according to any one of claims 1 to 4, wherein the temperature cutting element and the LED are connected in series, and these are connected in parallel to the IC chip. And a predetermined second circuit state in which the temperature cutting element and the LED are connected in parallel, and these are connected in series to the IC chip. A non-contact type data carrier device, wherein one or more circuit elements or circuit members for switching circuit states are arranged so that switching can be performed as appropriate.   6. The non-contact type data carrier device according to claim 1, wherein a capacitor for adjusting a resonance frequency is connected. 7. The non-contact type data carrier device according to claim 1, wherein the non-contact type data carrier device is an IC tag.

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