JPH01128876A - Manufacture of embossed pattern in portable medium - Google Patents

Abstract

PURPOSE: To obtain a required embossed pattern of high strength efficiently on the surface by cutting an embossed part through three-dimensionally controlling the relative position between a taper cutter and a portable medium and forming an embossed pattern on the portable medium. CONSTITUTION: A photosensitive resin is coated in a required thickness on a card substrate 10 using a spin-coating method or the like. Then after a proper preliminary curing process, photoetching is performed and consequently, an embossed part 11 of a required size is formed in a specified position on the card substrate 10. After the photoetching, the curing of the embossed part 11 is promoted by an ultraviolet emission or the like. Next, the card substrate 10 is fixed to the surface of a table on a cutting device, in which the movement of the table in the X axial direction and the Y axial direction and the movement of a taper cutter 13 in the Z axis direction, i.e., an engraving direction are controlled by a cutting position control part. The taper cutter 13 is rotated by a motor 12 to make the required cutting of the embossed part 11 so that an embossed pattern 14 is formed in a relief fashion.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a method for producing an embossed pattern (for example, letters) on a card-like portable medium, such as an IC card.

(Prior Art) Taking an IC card as an example of a portable medium, the IC card is, as shown in FIGS. An LSI chip constituting a CPU and memory is embedded, and a contact 2 is provided on the surface of the card base material 1 for transmitting and receiving data to and from external devices such as a reader/writer, and for inputting power.

According to the 180 (International Standardization Isokaku) standard, card base material 1
Its thickness is specified to be 0.76 mm, and its length and width are also specified to predetermined dimensions.

Further, the IC card is designed to be used in combination with existing magnetic cards, and for example, a magnetic strip drive 3 and necessary embossed characters 4 are coexisted on the surface of the card base material 1.

FIG. 7 shows a conventional method for producing embossed characters and the like on the card base material 1 of such an IC card. 7th
In the figure, 5 is a male die and 6 is a female die. The female die 6 is placed on the front side of the card base material 1, and the female die 5 presses the card base material 1 upward from the back side. The required embossed characters 4 are created on the surface.

By the way, recently, as shown in Fig. 8, a keyboard 7 and a liquid crystal display section 8 are incorporated on the back side of the card base material 1, and the recorded contents can be checked by manually operating the internal CPU without using a reader/writer or the like. An IC card that can perform such operations is being considered.

(Problem to be Solved by the Invention) However, as described above, in an IC card having a structure in which a keyboard 7 etc. is incorporated on the back side, the male type 5 is attached to the back side.
If pressed against it, the keyboard 7 etc. will be destroyed, so there is a problem that it is not possible to press up the card base material 1 from the back side with the male mold 5 and form embossed characters etc. on the surface thereof.

Further, the IC card is inserted into a league writer or an automatic teller machine, and is conveyed under the pressure of its conveyance rollers. For this reason, the embossed characters and the like formed on the surface of the card base material 1 are required to have high strength.

The present invention has been made based on the above circumstances, and is directed to a portable medium that can efficiently produce a required embossed pattern with high strength on the surface of the card base material without applying mechanical impact to the card base material. An object of the present invention is to provide a method for producing an embossed pattern.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the above problems, the present invention forms an embossed part on a portable medium, and has a taper at a predetermined angle for rotationally cutting the embossed part. The gist is to cut the embossed portion by using a taper cutter and three-dimensionally control the relative position between the taper cutter and the portable medium to form an embossed pattern on the portable medium.

(Function) In the above configuration, the relative position between the portable medium on which the embossed portion is formed in advance and the taper cutter is three-dimensionally controlled, and the embossed portion is rotatably cut with a taper cutter having a taper at a predetermined angle to form a trapezoidal cross section. form the desired embossed pattern.

By controlling the engraving amount of the taper cutter, an embossed pattern with a desired pattern width can be formed, and if the engraving width is kept constant, an embossed pattern with a predetermined pattern width is always formed. And the card base material is mechanical! ! An embossed pattern is formed on the surface with almost no impact.

In addition, in this invention, the embossed pattern refers to a pattern such as letters formed by ridges of resin etc.
This refers to an embossed pattern that is similar in appearance to the embossed pattern formed on the embossed pattern shown in the figures. Further, the embossed pattern includes letters, numbers, symbols, etc. formed of ridges made of resin or the like.

<Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 and FIG. 2 are diagrams showing an embodiment of the present invention.

First, to explain the devices and members applied to this embodiment, in FIG. 1, 10 is a card base material of an IC card which is a portable medium, and 11 is an embossed part formed on the card base material 10. As the embossed portion 11, for example, a photosensitive resin such as a photopolymer is used. Photopolymers are generally used as water-soluble photosensitive resins. The card base material 10 is fixed on a table of a cutting device (not shown), and is controlled to move in the X-axis direction and the Y-axis direction with respect to the main body of the cutting device. Further, a moving table is supported in the main body of the apparatus so as to be movable in the Z-axis direction via an appropriate support part, a motor 12 is attached to this moving table, and a taper cutter 1 is attached to the output shaft of this motor 12.
3 are connected appropriately.

The relative position between the taper cutter 13 and the card base material 10 is controlled three-dimensionally in the X, Y, and Z directions, so that the embossed portion 11 can be cut into a desired embossed pattern 14. The taper cutter 13 is formed to have a taper at a predetermined angle, and the taper cuts the embossed pattern 14 into a trapezoidal cross section as described later.

Next, a method of forming an embossed pattern using the above-described apparatus, members, etc. and its operation will be explained.

First, a photosensitive resin is coated onto the card base material 10 to a required thickness using a spin code method or the like, and after being appropriately precured, photoetching is performed to form a photosensitive resin at a desired position on the card base material 10. An embossed portion 11 of a required size is formed. After photoetching, the embossed portion 11 is accelerated in hardening by irradiation with ultraviolet rays or the like.

Then, the card base material 10 prepared as described above is fixed on the table of the cutting device. In the cutting device, the cutting position control section controls the movement of the table in the X-axis and Y-axis directions and the Z-axis direction of the taper cutter 13, that is, the engraving direction, and the taper cutter 13 is rotated by the motor 12'c to cut the embossed part. 11 is cut as required to form an embossed pattern 14 in relief.

In the example shown in FIG. 1, the number 11 is formed by cutting. Since the taper cutter 13 has a taper of a predetermined angle, the embossed pattern 14 formed by cutting the embossed portion 11 has a trapezoidal cross section as shown in FIG. As an example, Figure 2 (B)
Compared to the embossed pattern 16 cut with the non-tapered cutter shown in , the length of the trapezoidal bottom is increased by α.

Therefore, even if the pattern width Δ and the engraving IF3 are the same, the embossed pattern 14 of this example has increased strength compared to the comparative example.

Furthermore, since this embodiment uses the taper cutter 13, the pattern width A can be arbitrarily controlled by controlling only the engraving flB, and furthermore, the engraving ff1B can be controlled to be constant. By shifting, it is possible to always form an embossed pattern 14 having a predetermined pattern width A. In this manner, in this embodiment, the embossed pattern 14 having a desired pattern width, that is, a desired strength, can be formed extremely efficiently.

Since the base portion 15 is cut while remaining as the adhesive base of the embossed pattern 14 with the card base material 10, the adhesive strength is increased and the occurrence of peeling etc. is suppressed.
- Embossed pattern 14 with high layer strength.

Therefore, even if an IC card has a keyboard or the like arranged on the back side and has a structure that cannot be pushed up with a male die from the back side, the card base material is subject to almost no mechanical impact. However, an embossed pattern of approximately uniform height is properly produced on the surface.

Next, FIGS. 3 and 4 show another embodiment of the present invention. In this embodiment, even if the thickness of the card base material 10 changes for some reason, the distance between the cutter starting point of the taper cutter 13 and the surface of the card base material 10 on which the embossed part 11 is formed can always be kept constant. By controlling the movement amount of the deep cutter 13 in the 7@ direction, that is, in the engraving direction, a constant engraving ff1B is always obtained for the embossed portion 11, and an embossed pattern with a constant pattern width A is obtained. It was made so that it could be obtained.

First, to describe the configuration of the applied device, etc., in Fig. 3 and Fig. 2 (A), 17 is a holder plate;
7 is provided with an opening 17a, the lower surface of which serves as a setting surface for always setting the surface of the card base material 10, the surface on which the embossed portion 11 is formed, at a constant height. 18
is a table, 19 is a solenoid, and solenoid 19
An operating rod 19a is connected to the lower surface of the table 18.

Then, the card base material 19 on which the embossed part 11 is formed is fixed on the table 18, and when one solenoid is operated to push up the table 18, the embossed part 11 faces the opening 17a and the card The surface of the base material 10 on which the embossed portion 11 is formed is brought into contact with the lower surface of the holder plate 17 and is set at a constant height position. As a result, even if the thickness of the card base material 10 changes for some reason, the distance between the cutter starting point of the taper cutter 13 and the surface on which the embossed part 11 is formed on the card base material 10 will always be maintained, regardless of the thickness. held constant.

Next, by controlling the movement amount of the taper cutter 13 in the Z-axis direction, that is, in the engraving direction, a constant engraving filB is always obtained for the embossed portion 11, and the embossed pattern can be efficiently formed to a constant pattern width. It is formed.

FIG. 2(B) shows a comparative example for this embodiment. In this comparative example, the upper surface of the table 21 is a setting surface for setting the six sides of the card base material 10 at a constant height position. It is E. As in this comparative example, card base I4
Set the back side of 10 at a certain height position, and
If the distance between the cutter starting point 3 and the back surface of the card base material 10 is kept constant, if the thickness of the card base material 10 changes, the height position of the top surface of the embossed part 11 will change. Therefore, even if the movement ff1H of the taper cutter 13 in the engraving direction is controlled to be constant, the embossed portion 11
It is not possible to obtain a constant engraving ff1B.

Therefore, in such a comparative example, in order to obtain an embossed pattern with a constant pattern width A when the thickness of the card base material 10 varies, the amount of movement in the engraving direction ("
must be changed each time, resulting in an inefficient method.

[Effects of the Invention] As explained above, according to the present invention, an embossed portion is formed on a portable medium, and a taper cutter that cuts a taper at a predetermined angle for rotationally cutting the embossed portion is used. The embossed part is cut by three-dimensionally controlling the relative position between the portable media to form an embossed pattern on the portable media, resulting in a structure that cannot be pushed up with a male mold from the back side. It is possible to form a desired strong embossed pattern having a trapezoidal cross section with almost no mechanical impact on a portable medium.

Furthermore, if the engraving pattern for the embossed portion is controlled to a required value, an embossed pattern with a desired pattern width can be formed, and if the amount of engraving is controlled to be constant, an embossed pattern with a predetermined pattern width can be formed. As a result, a desired embossed pattern can be efficiently formed.

[Brief explanation of the drawing]

FIG. 1 is a perspective view schematically showing an example of an apparatus applied to an embodiment of the method for producing an embossed pattern in a portable medium according to the present invention, and FIG. 2 is a comparative example of an example of the embossed pattern produced. 3 is a partially cutaway perspective view showing an example of a device applied to an embodiment of the pond of the present invention; FIG. 4 is a cross-sectional view taken along line rV-rV of FIG. 3 together with a comparative example; Fig. 5 is a 'E+ perspective view showing the front surface of a conventional IC card, Fig. 6 is a side view of the above conventional example, and Fig. 7 is a perspective view for explaining a method for producing an embossed pattern in the above conventional example. , FIG. 8 is a perspective view showing the back side of another conventional IC card. 10: Portable medium card base material, 11: Embossed portion, 13: Taper cutter, 14: Embossed pattern.

Claims (2)

[Claims] (1) An embossed portion is formed on a portable medium, a taper cutter having a taper at a predetermined angle is used to rotationally cut the embossed portion, and the relative position between the taper cutter and the portable medium is three-dimensionally controlled. A method for producing an embossed pattern in a portable medium, characterized in that the embossed part is cut by using a wafer to form an embossed pattern on the portable medium. (2) The distance between the cutter starting point of the taper cutter and the surface on which the embossed portion is formed on the portable medium is kept constant, and the amount of movement of the taper cutter in the engraving direction is controlled to be constant. A method for producing an embossed pattern in a portable medium according to scope 1.