KR101523624B1 - IC chip having optically variable color and IC card using the same - Google Patents

Abstract

An IC chip having a time-varying color that can protect the IC chip from external environmental conditions such as scratches and chemicals, can form patterns corresponding to the pattern of the card on the IC chip, And an IC card using the same. The chip and the card have a conductive pattern with signal processing function and an additional function, and a conductive pattern having an insulating barrier for electrically insulating the conductive pattern. The conductive pattern of the IC chip has a variable color that varies in color depending on the viewing angle. The conductive conductive material is applied and inserted into the card body engraved with the pattern.

Description

[0001] The present invention relates to an IC chip having an optically variable color and an IC card using the IC chip,

The present invention relates to an IC chip and an IC card using the IC chip, and more particularly, to an IC chip that protects the IC chip from the external environment and realizes an optically variable color on the surface of the IC chip, Chip and an IC card using the IC chip.

The IC card has a built-in IC chip based on a semiconductor chip. It does not damage data even when it comes in contact with magnets. It can give more functions than a magnetic card, and has excellent security and durability. The IC card can write or erase data several times, and it can be equipped with a processor with computation ability besides memory. An IC card with a built-in processor has high security and functionality because it can be programmed to not only store data but also encrypt data or make it compatible with a computer of a certain standard. Such an IC card is divided into a contact type and a non-contact type, and has a hybrid card or a combination card having both a contact type and a non-contact type.

In the IC card, an IC chip having a conductive pattern formed thereon is inserted. Since the IC chip is firmly attached to the conductive pattern and the terminal, the IC chip can securely transmit relatively high data with high security. On the other hand, since the IC chip receives power from the terminal, the IC chip itself must have conductivity. Thus, the IC chip is electrically conductive (having a function of a power supply microprocessor Vcc, a reset signal RST, a clock signal CLK, a ground GND, a program voltage Vpp, and a data input / output The pattern is separated by an insulating barrier. The conductive pattern is usually formed by plating and conforms to a standard established by the International Organization for Standardization (ISO).

However, in the IC chip, the conductive pattern may be scratched by an external impact, or may be damaged by chemicals or the like. If the IC chip is damaged by the external environment, it may cause malfunction of the IC chip. In addition, the IC chip can not be provided with a color for a desired text on the surface of the IC chip, which is a great limitation in designing the IC card. That is, although various patterns can be inscribed on the IC card except for the IC chip, there is a risk of losing the conductivity of the IC chip, so that a design conforming to the pattern can not be realized. Further, the color does not remain simply for inscribing the pattern, and the color changes according to the viewing angle, so that the user can visually approach the information, and at the same time, it is not enough to prevent forgery and falsification.

A problem to be solved by the present invention is to provide an IC chip that protects from external environments such as scratches and chemical agents and forms a pattern corresponding to a pattern of a card on an IC chip, An IC chip having each color, and an IC card using the IC chip.

An IC chip for solving the problems of the present invention includes a conductive pattern having a signal processing function and an additional function, and an insulating partition wall electrically insulating the conductive pattern. At this time, the conductive pattern has a time-varying hue whose color changes according to the viewing angle, and the conductive conductive material is applied.

In the IC chip of the present invention, the time-varying hue can be achieved through a venetian blind effect obtained by orienting the pigment flakes included in the conductive material. The conductive material applied on the conductive pattern may have a plurality of regions depending on the pattern. Further, the conductive material may be composed of conductive particles mixed with pigments which realize a time-varying hue, or the conductive material may be composed of a pigment that realizes a time-varying hue, conductive particles, and a bonding agent that bonds them. Furthermore, the conductive material can be applied by a spraying method, a screen method, a transfer method, and a vapor deposition method.

An IC card for solving the problems of the present invention is an IC card comprising an IC chip composed of a conductive pattern having a signal processing function and an additional function and an insulating partition wall for electrically insulating the conductive pattern, And an IC card. At this time, the conductive pattern of the IC chip has a time-varying hue whose hue changes according to the viewing angle, and a conductive conductive material is applied.

In the IC card, the conductive material applied on the conductive pattern may form a plurality of regions according to the pattern of the IC card.

According to the IC chip of the present invention and the IC card using the IC chip, the conductive pattern of the IC chip is coated with a conductive film having a time-varying hue whose color changes according to the viewing angle, Power is supplied, and the IC chip can operate smoothly. In addition, it is possible to prevent the conductive pattern from being damaged by chemicals or the like due to scratches caused by an external impact, thereby preventing malfunctioning of the IC chip. In addition, a pattern having a desired color can be freely expressed on the surface of the IC chip so as to harmonize with the entire IC card. Furthermore, it is possible to provide an IC chip implementing a time-varying color that can change colors depending on viewing angles and prevent forgery and falseness, and an IC card using the IC chip.

1A is a plan view showing an IC card having an IC chip according to the present invention.
1B is a plan view for explaining the IC chip of FIG. 1A.
2 is a flowchart for explaining a method of manufacturing an IC card having an IC chip according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. The embodiments of the present invention are provided to enable those skilled in the art to more fully understand the present invention.

The embodiment of the present invention protects the conductive pattern of the IC chip from external environment such as scratches and chemicals by applying a conductive film having a time-varying hue conforming to the pattern of the card to the conductive pattern of the IC chip, IC chip having a time-varying hue that can be formed on a chip and can change color according to viewing angle and prevent forgery and falsification, and an IC card using the IC chip. To this end, the application of a conductive material that realizes a time-varying hue to the conductive pattern on the surface of the IC chip will be described in detail and a process of attaching the IC chip to the IC card will be described in detail. Here, for convenience of explanation, a contact type IC card is taken as an example of a contact type, a non-contact type, a hybrid type, and a combination type IC card. Of course, it will be apparent that the present invention can be applied to various types of IC cards within the scope of the present invention.

FIG. 1A is a plan view showing an IC card having an IC chip embedded therein according to an embodiment of the present invention, and FIG. 1B is a plan view for explaining the IC chip of FIG. 1A.

1A and 1B, an IC chip 20 is embedded in an insertion groove 24 formed at a predetermined position of the IC card main body 10. As shown in Fig. The card body 10 is typically made of a synthetic resin sheet such as PVC (PolyVinyl Chloride), PC (Poly Carbonate), PET (PolyEthylene Terephthalate) or the like, a printed layer having a desired pattern and a protective layer for protecting it from external stimuli. The pattern may be a combination of photographs, pictures, characters, symbols, etc., and the desired information can be represented on the IC card with various colors by using such a pattern.

The embodiment of the present invention implements the pattern of the card body 10 on the surface of the IC chip 20 as well. The IC chip 20 has the conductive pattern 21 separated on the surface of the insulating partition 22 and the conductive pattern 21 firmly adheres to the terminal so that the IC chip 20 has high security and can reliably transmit a relatively large amount of data have. The conductive pattern 21 of the IC chip 20 includes a power supply microprocessor Vcc, a reset signal RST, a clock signal CLK, a ground GND, a program voltage Vpp, and a data input / output (I / O) and other additional functions. Normally, the conductive pattern 21 is formed by plating and conforms to a standard established by the International Organization for Standardization (ISO).

A pattern matching the print layer of the card body 10 is printed on the surface of the IC chip 20 of the present invention. Here, for convenience of explanation, the patterns of the print layer of the card main body 10 and the surface of the IC chip 20 are represented by the first region R1, the second region R2 and the third region R3, respectively . Of course, within the scope of the present invention, the pattern may be depicted in a variety of patterns and characters. The patterns of the first to third regions R1, R2, and R3 have different colors. For example, the first region R1 may be set to the blue color system, the second region R2 to the red color system, and the third region R3 to the yellow color system. Also, the first to third regions R1, R2, and R3 of the print layer of the card body 10 extend to the surface of the IC chip 20 as well.

On the other hand, since the IC chip 20 receives power from the terminal, the conductivity of the IC chip 20 itself should not be lost. To this end, the embodiment of the present invention applies a conductive material having a time-varying color to the surface of the IC chip 20. At this time, the time varying color means that the color changes according to the viewing angle. The conductive material is applied only on the conductive pattern 21 of the IC chip 20 and is not applied to the insulating partition 22. By doing so, an electrical short between the conductive patterns 21 can be prevented. The process of applying the conductive material 21 may be predetermined according to the shape of the conductive pattern 21 of the IC chip 20 so that the conductive material is applied to the conductive pattern 21 by avoiding the insulating partition 22.

The conductive material having a time-varying hue can be selected in various ways according to the above-mentioned pattern. Specifically, a first form consisting of conductive particles mixed with a pigment flake implementing a time-varying hue, or a second form consisting of a pigment flake having a time-varying hue and conductive particles and a binder for bonding them, , Ink (ink), paste or paint (paste or paint). Here, the binder serves to bind the pigment and the pigment, the pigment and the conductive particle, and the conductive particle and the conductive particle. Each of the conductive materials of the first and second embodiments may include additives such as a curing agent, a dispersing agent and the like, if necessary.

The time-varying hue is achieved through the venetian blind effect, which occurs by orienting the pigment flakes included in the applied layer to which the conductive material has been applied correspondingly. The pigment flakes are locally oriented such that the markings or other visual indicia under the application layer are clearly visible to the observer depending on the particular viewing direction. So that the pigment flakes are locally oriented such that their planes have at least one common vector corresponding to the viewing direction.

When the locally oriented pigment flakes are viewed along a direction that is different in quality from the viewing direction, the visibility to the underlying markings or other patterns is blocked by the pigment flake acting on the observer in the form of a Venetian blind. Such blocking mechanisms may also be used to determine the presence or absence of the marking on the underlying substrate surface or in the surface, the precise orientation of the pigment flake, the pigment flake itself as well as the markings in color, brightness, etc. according to the physical properties of the coating composition containing the pigment flake Such as the angle-dependent appearance of the object.

In order to produce a time-varying effect, the pigment particles must have a flake shape, the dimensions of which are typically 10 to 30 탆 in length and width, and 1 탆 in thickness. Particles exhibiting such a geometric shape are suitable for implementing the Venetian blind effect of the present invention when orientation in the printed ink is properly controlled.

The conductive particles may be in the form of nano (5 nm to 1,000 nm) and may be in the form of metal particles such as gold (Au), silver (Ag), nickel (Ni), copper (Cu) Carbon particles, and the like. In some cases, the conductive particles may be inorganic semiconductors such as silicon, silicon carbide, boron nitride, aluminum nitride, zinc oxide, zinc oxide, and zinc sulfide, and poly-3-hexylthiophene, pentacene ), Perylene, carbon nanotubes, and C60 fullerenes.

The binder is for binding the conductive particles or the conductive particles and the pigment, and in the embodiment of the present invention, a non-aqueous binder which is not soluble in water is preferable. For example, the binder may be a polymer resin, either thermo plasticity or thermo setting properties. Examples of the thermo plasticity resin include acrylic acid resin, ethyl cellulose, polyester, polysulfone, phenoxy resin, polyimide, and the like . Examples of the thermosetting resin include amino resins such as urea-formaldehyde resin, melamine resin and guanamine resin, bisphenol A-type, bisphenol- Phenol resin such as F type, phenol novolak type, alicyclic type epoxy resin or resol type, Novolak type, or silicone epoxy epoxy, silicone polyester, and the like. In the embodiment of the present invention, at least one selected from the thermoplastic resin or the thermosetting resin can be applied.

Each of the first to third regions R1, R2, and R3 of the present invention may take any one of the first to third forms of the conductive material, but may be differently selected depending on the type of the pattern and the use environment . The proportion of conductive particles, pigments, binders, and other additives in the regions R1, R2, and R3 may be the same, but the ratios may vary depending on the kind of the pattern and the use environment. Further, when a white primer layer is added to the first to third regions R1, R2, and R3, the first and second shapes and the mixing ratio can be appropriately adjusted according to the primer layer.

According to the IC chip in which the color is implemented and the IC card using the IC chip, power is supplied to the IC chip 20 by applying a conductive film having a color matching the pattern of the card to the conductive pattern 21 of the IC chip 20 , The IC chip 20 can operate smoothly. In addition, it is possible to prevent the conductive pattern 21 from being damaged by external impact or being damaged by chemicals or the like. Accordingly, it is possible to prevent the IC chip 20 from being damaged due to an external environment and malfunctioning of the IC chip 20. Further, the IC chip can be provided with a color for a desired pattern on the surface of the IC chip, so that there is no restriction on the design of the IC card. Furthermore, it is possible to provide an IC chip implementing a time-varying color that can change colors depending on viewing angles and prevent forgery and falseness, and an IC card using the IC chip.

2 is a flowchart illustrating a method of manufacturing an IC card having an IC chip according to an embodiment of the present invention. At this time, the structure of the IC card in which the IC chip is incorporated will be described with reference to FIGS. 1A and 1B. Here, for convenience of explanation, a contact type IC card is exemplified as a contact type, a non-contact type, a hybrid type and a combination type IC card. Of course, it is obvious that the present invention can be applied to various types of IC cards within the scope of the present invention.

2, the pattern of the surface of the IC chip 20 is selected so as to match the pattern to be inscribed on the IC card (S10). The pattern may be a combination of photographs, pictures, characters, symbols, etc., and is expressed on the conductive pattern 21 of the IC chip 20 with various colors. Thereafter, a conductive material having a time-varying hue for printing a pattern on the surface of the IC chip 20 is prepared (S20). The conductive material may be selected from among the first and second forms as described in detail above. Then, at least one IC chip 20 to which a conductive material is applied is prepared.

A pattern is inscribed on the surface of the IC chip 20 by the conductive material (S30). At this time, the method of printing the conductive material may be at least one selected from a spraying method, a screen method, a transfer method and a vapor deposition method. The spraying method includes an ink jet printing method in which a conductive ink is applied, a pressure spraying method in which a conductive material is sprayed by applying heat and pressure, and the like. The screen method is a screen in which a cloth of a silk or chemical fiber is stretched to form a screen, (22) is covered with a pattern or an auxiliary material, ink is applied thereon, and ink is printed through the screen only on the conductive pattern (22) having the pattern. Such a screen method has a silk screen printing method. Here, the conductive material of the second form may be used for the ink-jet printing or screen method, but the conductive material of the first form is preferable for the pressurizing and spraying method.

In the transfer method, the pattern is printed on a transfer sheet, and then the pattern is transferred to the surface of the IC chip 20 to print. For example, the pattern may be printed on a transfer sheet by printing characters or drawings on a transfer sheet, and then transferred to the surface of the IC chip 20 before the conductive material is dried, and dried by applying a predetermined heat. The vapor deposition method is a method in which the vapor obtained by melting the conductive material in a crucible is deposited on the surface of the IC chip 20 through a mask masked with the insulating partition 22. Here, the transfer method is preferably a conductive material of the second form, but the conductive material of the first form is useful for the vapor deposition method.

On the other hand, a primer layer showing white color may be further added to the surface of the IC chip 20 before printing the pattern according to the embodiment of the present invention. The primer layer is a mixture of a white pigment and conductive particles, so that the color of the pattern embodied in the IC chip 20 can be made clearer. Such a primer layer can be formed by at least one method selected from a spraying method, a screen method, a transfer method and a vapor deposition method.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but many variations and modifications may be made without departing from the spirit and scope of the invention. It is possible.

10; Card body 20; IC chip
21; Conductive pattern 22; Insulating barrier
24; Insert groove

Claims (9)

A conductive pattern having a signal processing function and an additional function; And
And an insulating partition wall electrically insulating the conductive pattern,
And an electrically conductive conductive material is applied on the conductive pattern, the conductive pattern having a time varying hue varying in color depending on an angle viewed from above the conductive pattern. 2. The IC chip of claim 1, wherein the time-varying hue is achieved through a venetian blind effect obtained by orienting a pigment flake contained in the conductive material. The IC chip according to claim 1, wherein the conductive material coated on the conductive pattern has a plurality of regions according to the pattern. The IC chip according to claim 1, wherein the conductive material is made of conductive particles in which a pigment that realizes a time-varying hue is mixed. 2. The IC chip according to claim 1, wherein the conductive material comprises a pigment that realizes a time-varying hue, conductive particles, and a bonding agent that bonds them. The IC chip according to claim 1, wherein the conductive material is applied by at least one selected from a spraying method, a screen method, a transfer method and a vapor deposition method. An IC chip comprising a conductive pattern having a signal processing function and an additional function, and an insulating barrier for electrically insulating the conductive pattern; And
An IC card inserted with the IC chip and made of a card body engraved with a pattern,
Wherein the conductive pattern has a time-varying hue varying in color depending on a viewing angle, and is coated with a conductive conductive material. 8. The IC card of claim 7, wherein the time-varying hue is achieved through a venetian blind effect obtained by orienting a pigment flake contained in the conductive material. 8. The IC card according to claim 7, wherein the conductive material coated on the conductive pattern comprises a plurality of regions according to the pattern of the IC card extended with the IC chip.

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