JPS62259244A - Optical reading card - Google Patents

Abstract

PURPOSE:To expand the display area of visual information and to effectively prevent the visual information from being forged and altered by sticking an optical reading medium to a substrate so as to cover a part of a visual pattern on the substrate. CONSTITUTION:The optical reading medium 3 is sticked to one side of the substrate 2 on which a visual pattern 10 consisting of characters or the like is formed. An optical reflection layer 5 on which a dot-like data bit 6 or a groove-like guide track is formed is evaporated on a transparent substrate 4 to form the medium 3 and the layer 5 is constituted so as to cover a part of a pattern layer 10. A laser beam is radiated and the contents of a bit 6, track or the pattern layer 10 are observed, but since the size and pitch of the bit 6 are small, the layer 10 can be observed through the layer 5. Thereby, the display area of the visual information can be expanded and the information can be prevented from being forged and altered.

Description

[Detailed description of the invention] (B) Purpose of the invention [Industrial application field] This invention relates to an optical reading card.

In recent years, cards on which six scales of information are recorded have become popular as ID cards, key cards, and bank cards.

[Prior Art] It is necessary to record various information such as personal data and issuing company data on this type of card, and in the initial stage, such information is recorded in visible characters and symbols. In addition, at the stage described later, electrical signals using magnetism are used to record information, but it is necessary to prevent tampering and cope with an increase in the amount of information.

To this end, laser cards that utilize laser technology have recently been developed. This laser card can be used as an information recording medium with an optical reflective surface.

On the other hand, visible information such as letters and codes has the advantage of being able to be read visually, so it can be used to express simple information or to prevent card forgery or tampering. Alternatively, there is a great need to use it as a means of expression in design, but the area occupied by the optical recording medium on the laser card reduces the area for displaying visible information such as characters and figures. That is, in the conventional optical reading card 101, as shown in FIG. It is constructed by pasting a surface hardening layer 106. The base material 102 is made of polyvinyl chloride, for example, and has a high durability.
105 is made of polycarbonate, for example. The information recording layer 104 consists of an aluminum reflective layer 107, a recording bit 108 made of non-reflective chrome plating formed thereon, and a non-silver salt pattern layer 111 thereon.

Readout laser beam 1r! , prevention surface hardening layer 10
The information is not read out due to the difference in reflectance between the aluminum anti-Q-1 layer 107 and the recording bit 108.

[Problem 1 to be solved by the invention However, the optical reading card 10 configured in this way
In No. 1, since the opaque aluminum reflective layer 107 is present, the area for displaying visible information is reduced accordingly.

This invention was made in view of the above-mentioned circumstances, and it is possible to provide optical recording information and visible information on a card simultaneously, and therefore, even when an optical recording layer is provided on an optically readable card. , narrowing the display area of visible information is <K
The object of the present invention is to provide an optical card that is highly resistant to counterfeiting and tampering.

(B) Structure of the Invention Means for Solving Problem E 1 Corresponding to this purpose, the optical reading card of the present invention has the following features:
An optical reading medium on which information is recorded depending on the presence or absence of an optical reflective material layer and a card substrate displaying a visible pattern on its surface are placed, and the pre-reading medium is placed so as to cover at least a portion of the visible pattern. It is characterized by being pasted onto the card base.

Hereinafter, details of the present invention will be explained with reference to the drawings showing one embodiment.

In FIGS. 1 and 2, 1 is an optical reading card. The optical reading card 1 is made by pasting an optical reading medium 3 on one or both sides of a card base 2.

The card base body 2 guarantees the strength of the optically readable card 1, and the card base body 2 can be made of paper, a synthetic resin plate such as VC, or a thin metal plate. A visible pattern that displays visible information such as letters and figures on the card base 2! i10 is displayed by printing or the like.

As shown in FIGS. 2 and 3, the optical reading medium 3 has an optical reflective material layer 5 formed on a substrate 4 so as to cover at least a portion of a visible pattern layer 10.

The substrate 4 is made of polycarbonate resin, acrylic resin,
It is made of a material with good light transmittance, such as glass. The optical reflector layer 5 is deposited on the substrate 4 and has hole-shaped data bits 6 and groove-shaped guide tracks 7 formed therein. Therefore, the surface of the substrate 4 is exposed at the data bits 6 and guide tracks 7, but the rest of the substrate 4 is covered with optical reflective material FPj',). Optical reflective material layer 5
is composed of a thin film made of a material with high reflectivity, and examples of such U materials include Al1, Cu%AU, and Ni5C.
r.

Zn, Sn, Ti, etc. can be used. This optical reflective material H5 is formed by depositing the above-mentioned material on the substrate 4, and the patterns of the data bits 6 and guide tracks 7 formed on the optical reflective material layer 5 are formed by using a mask having such a pattern, It was transferred from photographic film. Such transfer is performed by an etching method or a resist lift-off method.

Next, a manufacturing method for manufacturing the optical reading card as described above by an etching method will be explained with reference to FIG.

First, an optical reflective material film 5a made of a material having a high reflectance for reading light is formed on the substrate 4 by vacuum deposition or the like (FIG. 4(a)). Next, a resist 11 is placed on the film 5a.
The spin code is 1° (Fig. 4(b)). This resist 11 may be of positive type or may be of negative type.

Next, a mask 12 having a pattern of data bits and guide tracks is tightly exposed onto the resist 11 (see Fig. 4).
C)).

Next, the exposed resist 11 is developed. This completes the transfer of the pattern onto the resist 11, and
There are formed irregularities corresponding to the data bits and guide tracks, and the resist 1- is removed and does not exist in the recessed parts, and the film 5
The surface of a is exposed, and in the remaining part, the resist 11 is covered with the film 5.
It covers the surface of a (Fig. 4(d)).

Next, the film 5a is etched from above the resist 11. As a result, the portion of G5a that is not covered with the resist 11 is removed and the surface of the substrate 4 is exposed, and the portion of the film 5a that is covered with the resist 11 is deposited on the surface of the substrate 4 together with the resist. remain (Figure 4(e))
. This remaining portion constitutes the optical reflective material layer 5 (FIGS. 1 to 3).

Note that the resists 1 to 11 may be removed if necessary.

This optical reflector layer 5 cooperates with the substrate 4 to transfer and represent the data bits and guide tracks of the mask 12. In this way, the optical reading medium 3 is completed.

Next, apply adhesive 8 on the resist 11 of this optical reading medium 3 (FIG. 4(f)), and place the optical reading medium 3 on the visible pattern 10 on one side of the card base 2, or both sides as necessary. Paste it (Figure 4 (g)).

Finally, the optical reading card 1 is completed by punching out a prescribed card shape (FIG. 4(h)).

Next, a manufacturing method for manufacturing the optical reading card as described above by the resist lift-off method will be explained with reference to FIG.

First, a resist 11 is spin-coded on the substrate 4 (FIG. 5(a)). This resist 11 may be of positive type or may be of negative type.

Next, a mask 12 having a pattern of data bits and guide tracks is brought into close contact with the resist 11 and exposed (FIG. 5(b)).

Next, the exposed resist 11 is developed. This completes the transfer of the pattern onto the resist 11, and
unevenness corresponding to the data bits and guide tracks is formed on the substrate 4, and the resist is removed and no longer exists in the depressions, and the substrate 4
The surface of the substrate 4 is exposed, and the remaining portion of the surface of the substrate 4 is covered with the resist 1-11 (FIG. 5(C)).

Next, an optical reflective material 5a is deposited on the resist 11.

The optical reflective material 5a is deposited on the resist 11, and is directly deposited on the exposed substrate surface in the concave portion where the substrate surface is exposed (FIG. 5(d)).

Next, the resist 11 is lifted off. As a result, the optical reflective material on the resist 11 is also removed together with the resist 11, and in the end, only the optical reflective material directly deposited on the substrate surface remains among the optical reflective materials 5a, which constitutes the optical thickness Q4 material layer 5.

This optical reflector layer 5 cooperates with the substrate 4 to represent the transfer of the rack to the data bits and guides 1 of the mask 12. In this way, the optical reading medium 3 is completed. (Figure 5 (
e)).

Next, apply adhesive 8 on the optical reflective material layer 5 of this optical reading medium 3 (FIG. 5(f)), and apply the optical reading medium 3 to one side of the card base 2, or both sides as necessary. Paste it (Fig. 5 (Q)).

Finally, a prescribed card shape is punched out to complete the optical reading card 1 (FIG. 5(h)).

[Operations and Effects] In the optical reading card configured in this way, when the laser beam is irradiated from the top surface of the card base 1 on the front surface and reflected by the optical reflective material layer 5, and the reflected light is read, the optical reflection The data bits 6 and the guide tracks 7, as well as the contents of the visible pattern layer 10 below the optical reflective material layer 5, can also be visually read due to the difference in reflection between the presence and absence of the material layer 5. That is, since the size and pitch of the data bits 6 in the optical reflective material layer 5 are several hundred μm to several μm, the visible pattern layer 10 is
1! ! ! It can be observed through 5.

Therefore, by printing the visible pattern FJ10 and providing various patterns in 71 colors, etc., it can be used to improve the design and prevent card forgery and tampering.

Therefore, when using a coaxial optical path type reading device as shown in FIG.
Therefore, the reading accuracy depends on I and t5 of the visible pattern layer 10.
I almost never get a W. However, when a diffuse reflection type reading device as shown in FIG. 7 is used as the reading device, the reflective portion appears dark and the non-reflective portion appears bright. In contrast to the case of using the coaxial optical path type reading device shown in FIG. However, even in this case, by selecting the material of the ink constituting the visible pattern layer 10, it can be made practically acceptable.

[Brief explanation of drawings]

Fig. 1 is an enlarged sectional view of an optical reading card, Fig. 2 is a plan view of the optical reading card, Fig. 3 is an enlarged perspective view of an optical reading medium, and Fig. 4 is an explanatory enlarged perspective view of the optical reading card. y
Figure 5 is a process diagram showing an example of the J manufacturing process, Figure 5 is a process diagram showing another manufacturing process of an optical reading card, Figure 6 is a configuration diagram showing a coaxial optical path type optical reader, and Figure 7 is a diagram showing diffused reflection. FIG. 8 is an explanatory diagram showing a structure of a type optical reading device, and FIG. 8 is an enlarged cross-sectional explanatory diagram of a conventional optical reading card. 1... Optical reading/Ricard 2... Card base
3... Optical reading medium 4... Substrate 5...
・44 optical reflection layers 6...data bits 7...
・Guide track 8...Adhesive 10...Visible pattern layer 11...Resist 12...Mask patent applicant Kyodo Printing Co., Ltd. Representative patent attorney Osamu Kawai Figure 6 Figure 7 Figure 8 =? cJ2=sun=Σgu

Claims (1)

[Claims] The optical reading medium has information recorded thereon by the presence or absence of an optical reflective material layer, and a card base displaying a visible pattern on its surface, and the optical reading medium is arranged to cover at least a portion of the visible pattern. An optical reading card characterized by being pasted onto a card base.