JP2005165794A - Ic card with indicator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an IC card with an indicator that can record a history of temperatures in the use environment and if necessary a history of wetting in order to correctly grasp what caused the failures of the collected IC cards. <P>SOLUTION: In its first embodiment, the IC card 1 with an indicator has a temperature history recording label 2 pasted or inserted in the IC module embedding concave 5 of the IC card or both the temperature history recording label and a wetting history recording label 2. In its second embodiment, it has a temperature history recording label pasted in a concave groove in a short side thereof or both the temperature history recording label and a wetting history recording label in addition to the recording label of the first embodiment. In its third embodiment, it has a temperature history recording label pasted in a concave groove in the upper edge face of the short side thereof or both the temperature history recording label and a wetting history recording label in addition to the recording label of the first embodiment. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an IC card with an indicator. Specifically, when collecting used IC cards, or when malfunctions occur, the IC card embedding recesses and, if necessary, the shorter side of the IC card can be used to correctly check the environment in which the IC card was used. The present invention relates to an IC card having a history recording indicator attached to the portion.

  The IC card is classified into a contact IC card, a non-contact IC card, and a contact / non-contact IC card (a 2-way card, generally called a combination card or a dual interface card). In addition, when classified from the state in which the IC card is used, it is generally stored in a personal wallet, such as a credit card or cash card, and is taken out only when necessary and used in a read / write device. There are various usage methods such as telephones, satellite broadcast decoders, in-vehicle devices for ETC, etc. that are used while attached to equipment, and the environment in which they are used varies.

By the way, the IC card is designed to withstand a certain temperature range, immersion in water, chemicals, etc., but the IC chip is destroyed because it deviates from the usable condition range under excessively severe conditions. May become unusable.
A clue to know in what environment (temperature, water, presence or absence of immersion in chemicals, etc.) the IC card that was broken during use in the market and returned for an analysis request, etc. In most cases, it is often not possible to determine whether the IC card has broken out of the usable environmental conditions or has broken under normal conditions.
Therefore, it is conceivable to incorporate an indicator such as water, chemicals, or temperature into the IC card, but it is necessary to have a function that can be used for a long period of time and reliably detected.

Patent Documents 1 to 4 and the like are detected as prior art relating to an IC card with an indicator or a sensor.
Patent Document 1 is a transponding card with a sensing function, and proposes to detect the temperature, humidity, atmospheric pressure, time, pulse, and body temperature with an IC card sensor and transmit it wirelessly. The specific configuration is not described.
Patent Document 2 proposes a chemical sensor card. This is a card in which a chemical sensor composed of a solid state chemical sensor, an amplifier circuit, an arithmetic circuit, a display, and a power source is incorporated in an IC card. There is concern about high costs.

Patent Document 3 describes an IC card with a sensor, but only a thermometer such as a thermocouple or a thermistor is built in the IC card body, and a pulse meter and other sensors are external devices for the IC card. It is about.
Patent Document 4 proposes an IC card including a stress sensor and a temperature sensor. It warns against excessive stress and temperature conditions applied to the IC card, and tries to prevent failure of the IC card. Although it is proposed to store the stress and temperature applied to the card in the memory of the IC chip, it is considered that a special IC chip is required.

JP 62-26999 A JP-A-63-61157 JP-A-2-59887 Japanese Patent Laid-Open No. 3-197194

The present invention is mainly intended to provide the IC card with a function of detecting and recording the temperature history and the water wetting history. Therefore, when the prior art of the technology is investigated, Patent Document 5, Patent Document 6, Patent Document 7, Patent Literature 8, Patent Literature 9, Patent Literature 10, and the like are detected.
Patent Document 5 describes a method for producing a test paper for water wetting detection, Patent Document 6 describes a printing ink composition for water wetting detection, and Patent Document 7 describes an immersion time indicator in water. Both are techniques that can be referred to in the present application. Patent Document 8, Patent Document 9, and Patent Document 10 describe irreversible temperature history indicators and the like. This technique can also be referred to in the present application.

JP-A-6-300751 JP-A-8-160030 JP 2003-130862 A JP 2002-294123 A JP 2002-365145 A JP 2003-172661 A

When an IC card malfunctions in the process of use, it is extremely important to clarify the cause in order to prevent the recurrence. In the environment used for this, it is becoming more and more important to elucidate the cause of the failure.
As described above, incorporating an indicator or a sensor into an IC card itself has a proposed prior art, but an IC card technology incorporating a practical indicator or sensor cannot be detected. That is, the conventional sensor configured as an electric circuit has a problem that the configuration of the IC card is complicated and the cost is increased.
Therefore, the inventor of the present application has studied a practical history recordable label made into a thin layer capable of chemically recording a temperature history or a water wetting history, and has studied the attachment position of an IC card to complete the present invention. Has been reached.

  The first of the gist of the present invention for solving the above-mentioned problems resides in an IC card with an indicator, characterized in that it has a temperature history recordable label attached or inserted into an IC module embedding recess of the IC card. .

  The second of the gist of the present invention for solving the above-mentioned problems is that it has a temperature history recordability label and a water wetting history recordability label attached or inserted into the IC module embedding recess of the IC card. IC card with indicator.

  The third of the gist of the present invention for solving the above problems is that a temperature history recordable label stuck or inserted into an IC module embedding concave portion of an IC card, and a concave groove excavated on the short side surface of the IC card. An IC card with an indicator characterized by having a temperature history recordability label stuck inside.

  The fourth of the gist of the present invention for solving the above problems is that the temperature history recordability label, the water wetting history recordability label attached or inserted into the IC module embedding recess of the IC card, and the short side of the IC card An IC card with an indicator, characterized in that it has a temperature history recordability label stuck in a recessed groove excavated on a side surface.

  The fifth of the gist of the present invention for solving the above problems is that a temperature history recordable label, a water wetting history recordable label attached or inserted into an IC module embedding recess of an IC card, and a short side of the IC card An IC card with an indicator, characterized by having a temperature history recordability label and a water wetting history recordability label stuck in a recessed groove excavated on a side surface.

  The sixth of the gist of the present invention for solving the above problems is that the temperature history recordable label stuck or inserted into the IC module embedding recess of the IC card and the recess excavated on the upper edge surface of the short side of the IC card. An IC card with an indicator, which has a temperature history recordable label stuck in a groove.

  Seventh of the gist of the present invention for solving the above problems is a temperature history recordable label, a water wetting history recordable label attached or inserted into an IC module embedding recess of an IC card, and a short side of the IC card. An IC card with an indicator, characterized in that it has a temperature history recordability label stuck in a recessed groove excavated on the side upper edge surface.

  The eighth of the gist of the present invention for solving the above problems is that a temperature history recordability label, a water wetting history recordability label attached or inserted into an IC module embedding recess of an IC card, and a short side of the IC card An IC card with an indicator, characterized in that it has a temperature history recordability label and a water wetting history recordability label stuck in a recessed groove excavated on the side upper edge surface.

In the above, the sticking or inserting position of the history recordable label or the water wetness recordable label in the IC module embedding recess can be in the first recess surface or the second recess of the IC module embedding recess. Also, if the short side to which the temperature or water wetting history recordability label is attached is the short side away from the IC module mounting part, record the history of both the IC module side and the opposite side. Can do.
The display temperature range of the temperature history recordable label can be set to 87 ° C to 88 ° C, and two points of 85 ° C to 90 ° C and 95 ° C to 100 ° C can be displayed. . Furthermore, it is preferable that the water wettability recordable label indicates the immersion time in water or hot water because the immersion time can be estimated.

In the IC card with an indicator of the present invention, a history recordable label for displaying a temperature history and, if necessary, a water wetting history is stuck in the concave portion for embedding the IC module, and is usually not touched by the user's hand or eyes. Therefore, when the IC card is used, there is no case where the label is naturally peeled and the history cannot be grasped.
In addition, if the IC card malfunctions under normal use conditions, the correct usage history can be grasped even if it is mistakenly recognized or reported. Limit measures can be taken.

Since the IC card with an indicator of the present invention is required to provide a history recordable label (hereinafter also referred to as “detection label” in the drawings) in the concave portion for embedding the IC module, the object of the present invention is the IC module. Contact type and contact / non-contact type IC cards having recessed portions for embedding are targets, and non-contact type IC cards in which an IC module or IC chip is completely embedded in a card base are not targets.
First, the IC card of the present invention will be described from its form.
1 and 2 show a first embodiment of the IC card with an indicator of the present invention, FIG. 3 shows the second embodiment, FIG. 4 shows the third embodiment, and FIG. 5 shows the temperature history. FIG. 6 is a diagram showing a cross-sectional configuration of the recordable label, and FIG. 6 is a diagram showing a cross-sectional configuration of the water-wetting history recordable label.

  1 and 2 are diagrams showing a first embodiment of an IC card with an indicator according to the present invention. FIG. 1 shows a case where a detection label is attached to the first concave surface, and FIG. When a detection label is attached or inserted, this is shown. FIGS. 1A and 2A are plan views, and FIGS. 1B and 2B are cross-sectional views taken along line AA in FIGS. 1A and 2A, respectively.

The concave portion 5 for embedding the IC module is a concave portion for mounting the IC module 4 having a maximum thickness of about 600 μm on the IC card base 10 having a thickness of about 800 μm, and is a first portion that suspends the terminal substrate 11 portion of the IC module 4. The concave portion 51 and the second concave portion 52 having a size and depth that can accommodate the thickest mold resin portion 12 of the IC module 4 are configured.
When mounting the IC module in the concave portion, a method of sticking the heat adhesive tape 13 on the surface of the first concave portion 51 or the IC module and heat sealing or fixing with a liquid adhesive is used. Therefore, when the IC card is immersed in water, water enters.
Further, the IC module embedding concave portion 5 is usually made larger by about 0.1 mm in both the vertical and horizontal directions than the actual dimension of the terminal board of the IC module to provide an air escape path during heat sealing. Therefore, water also enters from the gap with the terminal board. If this intruded water is for a long period of time, it will penetrate the mold resin and adversely affect the wire and IC chip.

  Examining the provisions related to the water resistance of the card, JIS X 6305 5.8 states that a. 5% saline, b. 5% aqueous acetic acid, c. 5% aqueous sodium carbonate solution, d. 60% aqueous ethyl alcohol solution, e. 10% sugar water, etc. are mentioned, and it is specified that they are not contaminated by these. Further, JISX6301 stipulates that no trouble occurs when immersed in each of the solutions defined by JISX6305.

  There are various sizes of the IC module terminal board. For example, when the IC module 4 having a size of 13.0 mm × 11.8 mm is used, the size of the first recess 51 is 13.1 mm × 11.9 mm. Become. A radius of curvature of about 2.5 mm is provided at the corner of the first recess. The depth is about 150 μm to 200 μm. The second recess 52 is a central portion of the first recess 51, and has a size of about 8.2 mm × 8.2 mm and a depth of about 650 μm at the maximum from the card surface.

The first recess 51 is excavated to a thickness obtained by adding the thickness of the adhesive tape to the thickness of the terminal substrate (usually about 200 μm), but the thickness of the detection label 2 itself is about 100 to 300 μm. In order to smooth the surface, it is necessary to excavate the portion to which the detection label 2 is attached to a depth that is approximately the thickness.
Since the detection label itself can have a size of about 1 mm square to 2 mm square, an area to be attached to the surface of the first recess can be secured. As shown in FIG. 1, it can be pasted at two corners of the first recess 51 and may be four. The corner portion of the first recess is because it is preferable to increase the adhesive strength at the center of the side, and in particular, the center of the short side of the first recess surface is in the card base in a contact / non-contact IC card. This is because it is often used for connection to an antenna coil.

As shown in FIG. 2, when the detection label 2 is attached or inserted into the second recess 52, it is necessary to dig the second recess slightly deeper by the thickness of the detection label 2. There are many possibilities due to the thinning and thinning of the IC module 4, and this is possible even in the present situation.
For reference, it is considered that IC modules have been put into practical use by adopting an ACF (Anisotropic Conductive Film) method and are not resin-molded. The thickness of the IC module can also be reduced by a method of mounting with the ACF and gold bumps with the circuit surface (pad side) of the IC chip being the substrate side.

  As shown in FIG. 1, the number of sticking points is not limited to one, and may be a plurality of points. In the case of the second recess, there is an advantage not directly related to the adhesive strength of the IC module. Moreover, when sticking on the card surface, although the fraudulent act which peels off a detection label and does not display an actual temperature arises, such fraud can be prevented in a 1st recessed part or a 2nd recessed part, and the external appearance when sticking on the surface Deterioration can be avoided.

  A method using both the first recess and the second recess may be used. For example, a temperature history recordable label is attached to the surface of the first recess 51, and a water wetting history recordable label is attached to or inserted into the bottom surface of the second recess 52. Further, the detection label 2 does not necessarily have to be attached to the bottom surface of the second recess 52 or the like with an adhesive or the like, and may simply be inserted into the recess.

3A and 3B are diagrams showing a second embodiment of the IC card with an indicator of the present invention. FIG. 3A is a plan view, and FIG. 3B is a cross-sectional view taken along line AA in FIG. is there.
In the second embodiment, in combination with the first embodiment, the groove 7 is excavated in the short side surface 6 of the IC card, and the detection label 2 is stuck in the groove 7. .
The effect of preventing deterioration of the appearance and preventing illegal acts by making the detection label 2 invisible can be similarly expected. Further, if it is provided on the short side opposite to the IC module mounting side, the history of the entire card can be known, and it can be determined whether the entire card is heated or locally heated.
Excavation of the concave groove 7 from the side surface is excavated by a counterbore method using an end mill in the same manner as the IC module embedding concave portion, but it is necessary to use a small-diameter mill blade of about 0.3 to 0.5 mm. A depth of about 3 to 5 mm is sufficient. In the case of FIG. 3, the concave groove 7 is one place, but it is needless to say that two places may be provided on the short side surface 6.

4A and 4B are diagrams showing a third embodiment of an IC card with an indicator according to the present invention. FIG. 4A is a plan view, and FIG. 4B is a cross-sectional view taken along the line AA in FIG. is there.
In the third embodiment, in combination with the first embodiment, a concave groove 9 is excavated in the upper edge surface 8 of the short side of the IC card, and the detection label 2 is stuck in the concave groove 9. And
In the case of the third embodiment, the detection label 2 of the concave groove 9 is visible from the surface of the IC card, but falsely reporting that it is used within the use conditions by making it visible. The warning effect can be demonstrated. If not illegal, the temperature history of both the IC module part and the card edge part can be known, and it is possible to determine whether the whole card is heated or locally heated. The groove 9 is sufficient if it has a depth of about the thickness of the detection label 2 and can be easily excavated by an end mill.

The object of the present invention is to provide the IC card with a function of chemically recording the temperature history and, if necessary, the water wetting history. However, the IC card is supported by a thin IC card and inserted in a place where it does not peel naturally. In order to make it stick, it is necessary to make the detection label itself into a thin layer.
Further, since a reversible label cannot know the past state, an irreversible label that remains as a history is required.
Therefore, the form of the temperature history and water wetting history recordability label will be examined.

(1) Temperature history recordable label Generally, a temperature history recordable label is a label composed of a colored temperature indicating element and a black carbon layer on the back surface thereof. When the temperature reaches a specified temperature, the temperature indicating element melts and flows. The black carbon layer on the back is configured to appear black in the indicator window. The surface is covered with a cover film having a transparent window. The bottom surface of the black carbon layer is a base with an adhesive.

  The temperature history recordable label 21 is illustrated as shown in FIG. There is a black carbon layer 212 behind the temperature indicating element 211, which has an integrated structure. The entire integrated structure is covered with a cover film 214 having a transparent window portion 213 at the temperature indicating element 211 portion. The portions other than the transparent window portion 213 of the cover film 214 are printed and opaque. A base 215 with an adhesive is provided on the lower surface of the black carbon layer 212, and the adhesive surface is covered with a release paper 216. When the temperature history recordable label 21 is used, the release paper 216 is peeled off and attached to a predetermined portion.

In the temperature indicating element 211, as described in JP-A-2002-365145, fatty acids, fatty acid salts, fatty acid triglycerides, fatty acid anhydrides, halogen-containing fatty acids, alcohols, ethers, aldehydes, It is considered that a hot-melt material selected from ketones, amines, nitriles, unsaturated group-containing hydrocarbons, halogen-containing hydrocarbons, thiols, and sulfides is used.
These heat-meltable substances are added with dyes such as direct dyes, acid dyes, basic dyes and disperse dyes, and pigments such as organic or inorganic pigments.

  Since fatty acids have various melting points, the temperature can be adjusted over a wide range from 40 ° C to 300 ° C by selecting a hot-melt material, and those with appropriate temperatures should be used. Can do. However, an IC card is defective if a failure occurs in a low temperature region of 60 ° C. to 70 ° C. or lower, and a high temperature region exceeding 100 ° C. is outside the use limit. The problem is not so much, and the range from 70 ° C to 100 ° C becomes a problem.

Specific commercial products of temperature history recordable labels include “Heat Label” manufactured by Micron Corporation and “Temp Plate” manufactured by IP Giken Co., Ltd.
The “heat label” has a base made of a polyester film, and an acrylic adhesive is adhered to the polyester film. The thickness of the label is about 300 μm. Normal products are 5 point display (displays 5 types of temperature steps), 6 point display, 1 point display, but cut out the necessary area from 5-6 point display to about 1x3mm and use it. It is possible. The “temp plate” has almost the same configuration, but it can be used at about 1 mm square.

In addition to the temperature history recordable label having the above-described configuration, the above-mentioned Japanese Patent Application Laid-Open No. 2003-172661 discloses that a colorant is added to a heat-meltable material having a recording temperature as a melting point so as to conceal it, thereby forming a thin layer with a constant thickness. A paper base material that absorbs the concealable layer material and the melted concealable layer material is fitted into a hole in the insole sheet and stuck to a support sheet, and the concealable layer material and the insole sheet Have proposed a label in a form covered with a transparent protective film.
However, the above-mentioned commercially available product is different from this product and does not use an absorbent paper substrate.

The temperature display accuracy of the display label is 77 °, 82 °, 88 °, 93 °, 99 °, 104 ° C for “heat label” near 85 ° C, ± 1%, and “temp plate” The accuracy is ± 1% at 76 °, 82 °, 87 °, 93 °, 98 °, and 104 ° C. In order to use this, for example, the operating limit temperature of the IC chip is usually about 75 ° C. to 85 ° C. Therefore, in the case of an IC chip with a limit temperature specification of 85 ° C., 85 ° It is effective to apply a detection label of C to 90 ° C or 87 ° C to 88 ° C.
It is also effective to paste a higher temperature (for example, 95 ° C. to 100 ° C.) together and leave a history that the higher temperature is applied.
For reference, the 3GPP standard (TS11.11) requires operation guarantee up to a maximum of 85 ° C.

(2) Water Wetting History Recordable Label There is a prior art of Patent Document 7 (Japanese Patent Laid-Open No. 2003-130862) as a water wetting history recordable label. In this, a discoloration layer comprising a water-soluble dye and an ink containing a water-soluble dye-diffusing ink vehicle, or a moisture indicator-containing sheet is applied on a water-impermeable substrate and covered with a water-soluble resin film. It proposes an underwater immersion time indicator characterized by However, since a commercial product of this product is not yet available, a water-wetting history recordable label was prototyped with reference to Patent Document 5 and Patent Document 6 described above by the applicant of the present application.

Patent Document 5 (Japanese Patent Application Laid-Open No. 6-300751) impregnates basic paper or neutral paper in a solution containing a reagent that exhibits a change in color tone when wet with water and a neutral resin or basic resin (neutral). And a method for producing a water-wetting detection test paper characterized by drying the basic paper or neutral paper (except for a combination of resin and neutral paper).
`` Reagents that change color tone when wet '' includes fluorescein or sodium fluorescein (uranin), but as long as it changes color tone when wet and maintains the changed color tone after drying, It is not limited. As basic paper, paper made with sodium carboxymethylcellulose fiber is recommended as water-soluble paper.

  The “neutral resin” is a nonionic resin that does not have a substituent having a polarity that dissolves in a hydrophilic solvent. For example, polyvinyl pyrrolidone resin, copolyvidone resin (vinyl pyrrolidone + vinyl acetate), (vinyl alcohol + vinyl acetate) copolymer resin, hydroxypropylcellulose resin, hydroxypropylmethylcellulose resin, hydroxyethylmethylcellulose resin, ethylcellulose resin, methylcellulose resin, acrylate copolymer resin (Ethyl acrylate + methyl methacrylate), vinyl acetate resin, cellulose acetate resin, butyral resin, and the like. These “neutral resins” can be used as a single or a mixture of two or more. Of these “neutral resins”, the copolyvidone resin is preferable in that it has excellent solubility and low hygroscopicity.

  The “basic resin” contained in the solvent is a resin having a basic substituent that dissolves in a hydrophilic solvent. Examples include methyl methacrylate / butyl methacrylate / dimethylaminoethyl methacrylate copolymer, ethyl acrylate / methyl methacrylate / methacrylated trimethylammonium ethyl copolymer, polyvinyl acetal / diethylaminoacetate, and the like. These “basic resins” can be used as a single or a mixture of two or more. Of these “basic resins”, polyvinyl acetal / diethylaminoacetate is preferable in that it has excellent solubility and low hygroscopicity.

As a solvent for dissolving these “reagents that change color tone when wet” and “neutral resin” or “basic resin”, a hydrophilic solvent or a mixed solvent of a hydrophilic solvent and another solvent is used. Examples of the hydrophilic solvent include alcohol solvents such as ethanol and 2-propanol, cellsolv solvents such as 2-methoxyethanol, and dichloromethane.
Moreover, the addition amount of "the reagent which shows a color tone change when wet with water" is 0.1-0.5% (mass) with respect to the said solvent to be used, Preferably it is 0.2% (mass). Since fluorescein sodium (uranin) is a water-soluble reagent, if it is added excessively, the dye flows out, which is not preferable. In addition, when the base paper is impregnated at about 0.2% (mass), it becomes easy to obtain a water-wetting test paper that shows a remarkable color change when dried and wet, and that has little dye flow-out. It is advantageous.

  It is essential to impregnate the prepared solution with “neutral paper” or “basic paper”. The impregnation is literally to immerse the “neutral paper” or “basic paper” in the solution, but the solution may be applied or printed on the surface of the paper.

Since the water-wetting test paper obtained as described above immediately changes its color tone when wet, it cannot know the water immersion time. Therefore, the water-wetting history recordable label used in the present invention was used by covering the lower surface side of the water-wetting test paper obtained above with a water-impermeable substrate and the upper surface side with a water-soluble film.
As the non-water-permeable substrate, a thin plastic film (about 8 to 20 μm) can be used. For example, polyethylene terephthalate (PET), polypropylene (PP), polycarbonate (PC) and the like can be preferably used.

As the water-soluble resin film, polyvinyl alcohol, partially saponified polyvinyl acetate, a copolymer of vinyl alcohol and vinyl acetate, or the like can be preferably used.
Commercially available water-soluble resin films, for example, Hythelon (trademark) manufactured by Nihon Gosei Co., Ltd. have various product numbers, so various films can be selected from those that dissolve in cold water to those that dissolve only in hot water. . For example, the H type does not dissolve in cold water but dissolves in hot water, so that contact with hot water temperature can be detected.

The water wetting history recordable label 22 is illustrated as shown in FIG. The water-wetting test paper 221 obtained above is held between the water-soluble film 222 and the water-impermeable substrate 223. The water-soluble film 222 and the non-water-permeable base material 223 may be bonded around the water-wetting test paper 221. In the case of a resin such as EVAL (trademark), the water-soluble film 222 and the water-impermeable base material 223 are co-extruded. It can also be held in the middle. The overall thickness can be formed to about 100 to 200 μm.
If the water-soluble film 222 is a coating film having portions with different thicknesses, the length of the water immersion time can be known. However, the water dissolution time of the water-soluble film 222 is greatly affected by the temperature of the hot water and stirring, and is a standard level.

An embodiment of the present invention will be described with reference to FIGS.
<Preparation of water wetting history recordable label>
To a mixed solution of 60 parts by mass of 2-methoxyethanol and 40 parts by mass of methyl ethyl ketone (MEK), 0.2 parts by mass of uranin and 5 parts by mass of VA64 (copolyvidone resin manufactured by BASF Corp.) as a neutral resin are added and dissolved. A paper roll made of carboxymethyl cellulose-sodium fiber (“MDP” made by Mishima Paper Co., Ltd. 120 g / m ² ) is used to dip a roll paper into the coating solution prepared in the above, using a dip coater, and dried. A water-wetting test paper 221 was prepared (see FIG. 6). The test paper instantly changed from orange-red to yellow-green fluorescence when wetted with water, and once wetted it remained yellow even when dried.

  The water wetness test paper 221 was cut into a size of 2 mm × 2 mm. A water-impermeable base material (PET film, thickness 10 μm) 223 used on the lower surface side of the water test paper 221 and a water-soluble film (“Hi-Selon (trademark) H” manufactured by Nihon Gosei Co., Ltd., thickness 40 μm) used on the upper surface side. A water-wetting history recordable label 22 having a size of 4 mm × 4 mm, a water-wetting test paper 221 placed in the center, and the periphery of the paper 4 adhered with an adhesive to make it watertight was completed. The total thickness was about 150 μm.

<Preparation of temperature history recordable label>
Purchase “Temp Plate” manufactured by IP Giken Co., Ltd. Cut out the 87 ° C and 98 ° C parts from the 4-point display label to a size of 1 mm x 1 mm and prepare as temperature history recordable label 21 did. The thickness of the temperature history recordable label portion is about 300 μm (with adhesive).
Since the detection label 2 has a black carbon layer on the lower surface of the temperature indicating element, it reaches a specified temperature and appears black when the temperature indicating element melts.

<Preparation of IC module>
A COT (Chip On Tape; glass epoxy base material, 110 μm thick) IC chip on which a contact IC chip was mounted and a wire bonding portion were surrounded, and an epoxy resin was dropped to perform resin molding. The size of the IC module substrate is 13.0 mm × 11.8 mm, the mold resin portion 12 is 8.0 mm × 8.0 mm, and the height of the mold resin portion 12 not including the substrate thickness is 440 μm. became.
The back surface of this COT is laminated by punching out the heat adhesive tape 13 (thickness: 50 μm) so that the portion in contact with the first concave surface except for the mold resin portion 12 and the temperature history recordable label portion (two locations) is covered. did. The heat adhesive tape is compressed by about 10 μm by lamination.

<Preparation of card base>
A hard white vinyl chloride sheet having a thickness of 360 μm is used as a core base material, and two core sheets 12 having the same thickness and the same material are overlapped to form a central layer, and a transparent layer having a thickness of 50 μm is used as an oversheet on both sides. After the vinyl chloride sheets were stacked and the four sheets were temporarily fixed, they were introduced into a press machine and hot pressed. The hot press conditions were 150 ° C., 98 N / cm ² and 20 minutes. Then, it was punched into individual pieces of each card size by a punching machine.

<Cutting of recesses for embedding IC modules>
The concave portion 5 for embedding the IC module was formed by NC cutting of a counterbore machine.
First, the first recess 51 was cut to a depth corresponding to the total thickness of the IC module substrate (contact terminal plate) and the thermal adhesive tape 13. The size of the first recess 51 at this stage was 13.1 × 11.9 mm, and the depth was 150 μm. This size is an opening that is about 0.1 mm larger than the actual terminal board, but the compatibility in that case is good. Next, the second recess 52 for accommodating the mold resin portion 12 of the IC module 4 was excavated so that the size was 8.2 mm × 8.2 mm, the depth was 720 μm from the card surface, and 570 μm deep from the surface of the first recess 51.

<Attaching and inserting detection labels>
The portion where the temperature history recordable label 21 is stuck at two corners (diagonal positions) of the first concave surface was cut to a size of 1.1 mm × 1.1 mm and a depth of 300 μm. Here, the 87 ° C. and 98 ° C. temperature history recordability labels 21 prepared earlier were attached with the display surface facing upward. With the label attached, the label surface and the first concave surface were uniform, and the temperature history recordable label 21 was visible.
After the previously prepared water wetting history recordable label 22 was inserted into the bottom surface of the second recess, the IC module was mounted as follows.

<Cutting the groove on the short side of the IC card>
A groove 7 was cut in the short side surface 6 on the side away from the IC module embedding recess 5.
The concave groove 7 was cut with a 0.5 mm end mill blade so that it had a thickness of 0.5 mm, a width of 4 mm, and a depth of 3 mm at substantially the center of the short side surface.
The temperature history recordable labels 21 of 87 ° C. and 98 ° C. prepared in advance in the concave groove 7 were attached with the display surface facing upward. Therefore, this example corresponds to the second embodiment of the present invention (see FIG. 3).

<Installation of IC module>
The IC module 4 on which the previously prepared thermal adhesive tape 13 has been laminated is punched from the COT and mounted on the surface of the first concave portion 51 of the concave portion for embedding, and the thermal adhesive tape 13 is melted by applying heat pressure with a heater block. Module 4 was fixed. The condition of the heater block was 150 ° C., 40 N / cm ² , time: 1 second.
However, as the heater block, a block provided with a notch so as to escape the terminal surface directly above the temperature history recordable label 21 was used so as not to be pressed. This is to prevent the label from reacting at the press temperature.

<Evaluation test and test results>
The test was conducted under the following conditions for the five IC cards with indicators completed as described above.
(1) A test in which the entire IC card is immersed in boiling water at 100 ° C. for 10 minutes.
(2) A test in which the entire IC card is immersed in hot water of 88 ° C. to 90 ° C. for 10 minutes.
(3) A test in which only the IC module side of the IC card is immersed in hot water of 88 ° C. to 90 ° C. for 10 seconds.
(4) A test in which the entire IC card is immersed in hot water at 55 ° C. for 10 minutes.
(5) A test in which the entire IC card is immersed in cold water at 10 ° C. for 10 minutes.

  The IC module of the IC card 1 with the indicator after the test is peeled off, and the temperature history recordable label on the surface of the first recess, the water wetting history recordable label in the second recess, and the short side groove 7 The state of the temperature history recordable label was observed. The results are shown in Table 1.

From the above results (1) and (2), it can be seen that the difference between an IC card that has been subjected to a temperature of 100 ° C. and an IC card that has not been received can be clearly distinguished. From the result of (3), in about 10 seconds, hot water does not penetrate into the IC module embedding recess, or even if it penetrates, the water-soluble film of the wet record recording label does not dissolve, from the result of (4) It can be seen that if hot water is immersed for 10 minutes in the hot water, the hot water penetrates into the embedded recess.
As described above, it was confirmed that the IC card with an indicator of the present invention can clearly detect the temperature history and the water wetting history.
The practical value of such an IC card with an indicator is considered to increase further as the temperature history recordable label and the water wet record recordable label become thinner in the future.

It is a figure which shows 1st Embodiment (1st recessed surface) of the IC card with an indicator of this invention. It is a figure which shows the said 1st Embodiment (in a 2nd recessed part). It is a figure which shows the 2nd Embodiment. It is a figure which shows the same 3rd Embodiment. It is a figure which shows the cross-sectional structure of a temperature history recordable label. It is a figure which shows the cross-sectional structure of a water wet history recordable label.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 IC card with an indicator 2 Detection label 4 IC module 5 IC module embedding recessed part 6 Short side surface 7 Concave groove 8 Short side upper edge surface 9 Concave groove 10 IC card base | substrate 11 Terminal board 12 Mold resin part 13 Thermal adhesive tape 21 Temperature history recordable label 22 Wet history recordable label

Claims (14)

An IC card with an indicator, characterized in that it has a temperature history recordable label stuck or inserted into an IC module embedding recess of the IC card. An IC card with an indicator, characterized by having a temperature history recordable label and a water wetting history recordable label stuck or inserted into an IC module embedding recess of the IC card. It is characterized by having a temperature history recordable label stuck or inserted in the IC module embedding recess of the IC card, and a temperature history recordable label stuck in a recessed groove excavated on the short side surface of the IC card. IC card with indicator. Temperature history recordability label and water wetting history recordability label attached or inserted into the IC module embedding recess of the IC card, and temperature history recordability attached to the recessed groove excavated on the short side surface of the IC card. An IC card with an indicator, characterized by having a label. Temperature history recordability label and water wetting history recordability label attached or inserted into the IC module embedding recess of the IC card, and temperature history recordability attached to the recessed groove excavated on the short side surface of the IC card. An IC card with an indicator, characterized by having a label and a wettability recordable label. It has a temperature history recordable label stuck or inserted in a concave portion for embedding an IC module of an IC card and a temperature history recordable label stuck in a concave groove excavated on the upper edge surface of the short side of the IC card. IC card with indicator. Temperature history recordability label and water wetting history recordability label stuck or inserted in the IC module embedding recess of the IC card, and temperature history stuck in the recess groove excavated on the upper edge surface of the short side of the IC card An IC card with an indicator, comprising a recordable label. Temperature history recordability label and water wetting history recordability label stuck or inserted in the IC module embedding recess of the IC card, and temperature history stuck in the recess groove excavated on the upper edge surface of the short side of the IC card An IC card with an indicator, comprising a recordable label and a wettability recordable label. 9. The history recordable label in the IC module embedding recess or the sticking or inserting position of the water wetting history recordable label is the first recess surface of the IC module embedding recess. The IC card with an indicator according to any one of claims. 9. The history recordable label in the IC module embedding recess or the wetness record recordable label attaching or insertion position is in the second recess of the IC module embedding recess. An IC card with an indicator according to claim 1. The short side to which the temperature or water wetting history recordability label is attached is the short side on the side away from the IC module mounting portion, according to any one of claims 3 to 8. IC card with indicator. 9. The IC card with an indicator according to claim 1, wherein a display temperature range of the temperature history recordable label is 87 ° C. to 88 ° C. 10. The display temperature of the temperature history recordability label is displayed at two points of 85 ° C to 90 ° C and 95 ° C to 100 ° C, according to any one of claims 1 to 8. An IC card with an indicator according to claim. The claim of claim 2, claim 4, claim 5, claim 8, or claim 8, wherein the wet record history recordable label indicates water or hot water immersion time. IC card with an indicator as described.

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