JPH02301496A - Data recording medium - Google Patents

Abstract

PURPOSE:To prevent the forgery of a prepaid card by providing a code recording layer recording a discrimination code discriminable by the reflected rays of infrared rays on a magnetic recording layer recording magnetic data. CONSTITUTION:An infrared reflecting layer 14 having a predetermined thickness is arranged on a magnetic recording layer 13 and a bar code 15 absorbing infrared rays is arranged on said reflecting layer 14. When a prepaid card 11 is inserted under the infrared irradiation head 21 of a reader/writer, infrared rays of a predetermined wavelength are emitted to the surface of the card 11 from a light emitting diode 22. Said irradiation rays are absorbed by the bar code 15 and reflected by the reflecting layer 14 to be detected by the photodetector 23 of the head 21 and a discrimination code is read to discriminate the prepaid card 11 and it is checked whether there is the bar code and, when said code is present, it is checked whether the data of the bar code is correct. Thereafter, magnetic data is read by the reader and the magnetic data of the magnetic recording layer 13 is renewed corresponding to used quantity by the writer and rewritten to record the new balance on the recording layer 13.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is applicable to prepaid cards having a magnetic recording section such as train tickets, coupon tickets, and telephone cards, and information recording cards having a magnetic recording section such as stamp cards. The present invention relates to media, particularly information recording media suitable for preventing counterfeiting and unauthorized use.

<Conventional technology> As a conventional prepaid card, for example, Figs.
The one shown in Figure 1 is known.

In FIGS. 7 and 8, the prepaid card 1 is
It was structured as follows. Reference numeral 2 denotes a base of the card, and this base 2 is made of a base material such as polyvinyl chloride. A magnetic layer 3 is provided on the upper surface of the base 2, and a data track (ie, magnetic stripe) 4 on which data (amount information) is magnetically recorded is provided in a part of the magnetic layer 3. This data track 4
is provided in a part of the magnetic layer 3 with a predetermined width.

Therefore, when using this prepaid card 1, data recorded on the data track 4 is read using a magnetic data reader/writer in a terminal device, and new data is written on the data track 4.

<Problems to be Solved by the Invention> However, such conventional prepaid cards 1 have been subject to unauthorized use and forgery as described below. That is, as shown in FIGS. 9 and 10, a thin magnetic tape 5 is pasted on the upper surface of the data track 4 on which the amount information is written on the prepaid card 1, and in this state the card 1 is inserted into a reader/writer. It is intended to be inserted and used.

As a result, data (amount information) can be read from the data track 4 via the thin magnetic tape 5, and updated data can be written to the data track 4 via the magnetic tape 6. At the same time, updated data (amount information) is written on the magnetic tape 5 in the same way as this genuine data track 4.

Therefore, if this magnetic tape 5 is then peeled off from the card 1 and pasted on a predetermined position on the card body 6 which does not have a data track, a counterfeit prepaid card 7 will be manufactured as shown in FIG. Become.

That is, there is a problem in that a counterfeit prepaid card 7 can be easily obtained by using the genuine prepaid card 1 as described above. In addition, prepaid car F according to the conventional structure
However, it was not possible to effectively prevent such simple counterfeiting methods.

An object of the present invention is to provide an information recording medium that can prevent forgery by the above method.

<Means for Solving the Problems> An information recording medium according to the present invention includes a base, disposed on the base, and 8! It is characterized by having a magnetic recording layer in which L data is recorded, and a code recording layer disposed on the magnetic recording layer and in which an identification code that can be identified by reflected infrared light is recorded.

<Function> In the information recording medium according to the present invention, a code recording layer is provided on the magnetic recording layer. An identification code that can be identified by reflected infrared light is recorded on this code recording layer. Therefore, even if a thin magnetic tape is pasted on the magnetic recording layer as in the past and an attempt is made to insert the card into an 81-ki card reader/writer for unauthorized use, such unauthorized use and forgery will be prevented. In other words, this reader/
In a writer, first, infrared rays are irradiated onto the magnetic recording layer of the card, and the reflected light is used to identify whether the information recording medium is genuine or counterfeit. However, as the infrared rays are absorbed by the attached magnetic tape, the identification code cannot be read by the reflected light. In this way, unauthorized use is prevented.

<Example> The information recording medium according to the present invention will be specifically described below based on an example.

1 to 4 show a first embodiment of the present invention.

In these figures, numeral 11 indicates a prepaid card which is a rectangular plate-shaped body. This prepaid card 11 is
The card has a card base 12 made of polyvinyl chloride, polyethylene terephthalate, etc., and a magnetic recording layer 13 laminated on the base 12. Magnetic data is recorded in this magnetic recording layer 13. For example, it is amount information.

This magnetic recording layer (data track) 13 is formed to have a predetermined width (a part of the entire magnetic layer) like a conventional magnetic stripe. Note that the physical properties required of the card base 12, such as strength and rigidity, are selected as appropriate. Further, the magnetic recording medium N13 is formed by dispersing known magnetic fine particles in a suitable resin or ink vehicle by a coating method such as a gravure method.

An infrared reflective layer 1 of a predetermined thickness is provided on this magnetic recording layer 13.
4 are arranged. For example, a metal such as aluminum is vapor-deposited. A barcode 15 that absorbs infrared rays is disposed on the infrared reflective layer 14, and this barcode 1
5 is covered by concealment N16. This hidden layer 1
6 is made of a mixture of yellow, magenta, and cyan process inks, for example. Further, 17 is a protective layer disposed on the concealing layer 16.

Therefore, the infrared reflective layer 14 and the barcode 15 as a whole constitute a code record 8N1B in which an identification code that can be identified by reflected infrared light is recorded.

The infrared reflective layer 14 is formed using a paint or ink obtained by dispersing a pigment with high infrared reflectance in a binder. In addition, the barcode 15 is an infrared reflective N14
A binder similar to that used in the invention is coated or printed on a desired position by dispersing quinocinacone, etc., which have a high infrared absorption rate. Furthermore, the hiding layer 16 is
Using the same binder as above, and adding various pigments that transmit infrared rays but not visible light, it is similarly made into a paint or ink, and is formed by coating or printing. The protective layer 17 is formed by laminating synthetic resin films or the like.

In the prepaid card 11 having the above configuration, as shown in FIG. 3, the card 11 is first inserted below the infrared radiation head 21 of a magnetic data reader/writer. The infrared ray irradiation head 21 irradiates infrared rays of a predetermined wavelength from the light emitting diode 22 toward the surface of the card 11 . This irradiated light is absorbed by the barcode 15, and is absorbed by the reflective layer 1.
reflected by 4. This reflected light is detected by the light receiving element 23 of l\foot 1. Therefore, the identification code is read and the prepaid card 11 is identified. That is, it is checked whether or not the barcode 15 exists, and if so, whether or not the barcode data is correct.

After that, the magnetic data is read by the reader, and if there is any remaining amount, it can be used. In addition, the magnetic data of the magnetic recording layer 13 is updated by a writer according to the quantity used.
Will be rewritten. A new remaining amount is recorded on the recording layer 13.

Further, FIG. 4 shows a case where a thin magnetic tape 25 is pasted on the surface of the prepaid card 11, directly above the magnetic recording N13. Therefore, the card 11 to which the thin magnetic tape 25 is attached in this manner is placed below the infrared radiation head 21 of the reader/writer, and the light emitting diode 22 irradiates infrared rays toward the upper surface of the tape 25.

However, the magnetic tape 25 absorbs infrared rays, and the infrared rays cannot reach the barcode 15.

As a result, the identification code becomes unreadable and the card cannot be determined or recognized as a genuine prepaid card. Therefore, the inserted cart is ejected from the reader/writer before reading magnetic data from the magnetic recording layer.

As described above, unauthorized use and counterfeiting by attaching magnetic tape can be prevented. Furthermore, in this embodiment, since an infrared barcode is formed on the card, it is extremely difficult to counterfeit the card itself. Furthermore, after reading the barcode data, it is encrypted and magnetically recorded on the data track, and the authenticity is confirmed by matching the barcode data read at the time of reading and the magnetically recorded data by decryption. You can also do that. It is also possible to take more advanced security measures against forgery.

FIG. 5 shows a prepaid card 3 according to a second embodiment of the present invention.
1 is shown.

In this embodiment, the base body 32 and the magnetic recording layer 33 are constructed in the same manner as in the above embodiment. Infrared reflection ff134
The portion corresponding to the barcode is formed as a window 35. That is, the plurality of windows 35 of the infrared reflective layer 34 are formed to have a predetermined width and a predetermined interval.

Further, the concealing layer 36 covering the infrared reflective layer 34 also penetrates into the window 35 portion. Since the material forming the concealment N36 is a material that transmits infrared rays, when infrared rays are irradiated, the infrared rays are absorbed by the magnetic recording layer 33 via the principle 35.

As a result, a barcode is formed by the infrared reflective layer 34 and these windows 35, and the authenticity of the card can be identified. Note that 37 is a protective layer.

Other usage methods are the same as in the above embodiment.

FIG. 6 shows a third embodiment of the invention.

In the prepaid card 41 according to this embodiment, a magnetic recording N (data track) 43 is formed on a base 42, and an infrared reflective layer J layer 44 is formed on this track 43. The infrared reflective layer 44 may be made of ordinary white ink.

On the infrared reflection N44, a bar code 'N47 is formed in which process ink 45 and carbon black ink 46 are arranged in alternating stripes. Carbon black ink 46 has a high infrared absorption rate. On the other hand, the process ink 45 transmits infrared rays. Also, these are black.

Furthermore, a varnish coating [48] containing a matting agent is formed on these inks [47]. This protective layer 48 prevents identification of the barcode N47 due to diffuse reflection of visible light. In this embodiment, the thickness of the card can be made thinner than in each of the above-mentioned embodiments, and problems in reading/writing can be prevented.

<Effects of the Invention> According to the information recording medium according to the present invention, it is possible to completely prevent counterfeiting of the information recording medium by using a method in which a thin magnetic tape is pasted onto a data track. Further, according to the present invention, since an identification code using reflected infrared light is provided on the information recording medium, it is possible to achieve a higher degree of prevention of forgery and unauthorized use.

.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an information recording medium according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the ■-■ arrow in FIG. 1, and FIG. 3 is a use of the card according to the first embodiment. Side view, illustrating the method
FIG. 4 is a side view illustrating a case where the card according to the first embodiment is used illegally, FIG. 5 is a sectional view of the card according to the second embodiment, and FIG. 6 is an information recording medium according to the third embodiment. 7 is a front view showing a conventional prepaid card, FIG. 8 is a side view of a conventional card, and FIG. 9 is for explaining an example of unauthorized use of a conventional card. FIG. 10 is a cross-sectional view taken along the line X--X in FIG. 9, and FIG. 11 is a side view for explaining the conventional card forgery method. 11... Prepaid card, 12...
・ ・ ・ ・ ・ ・ ・Base, 13...
. . . Magnetic recording layer, 15 . . . Bar code, 18 . . . Code recording layer. Patent applicant Toppan Printing Co., Ltd. Agent
Patent Attorney Kiyoshi Kuwai - Figure 1 Figure 3 Figure 5 Figure 6 Figure 7 Figure 9 Figure 7''''-1 x,,i Figure 10 Figure 8

Claims (1)

[Claims] (1) a base, a magnetic recording layer disposed on the base and having magnetic data recorded thereon, and a magnetic recording layer disposed on the magnetic recording layer;
An information recording medium comprising: a code recording layer on which an identification code that can be identified by reflected infrared light is recorded.