JP2001191690A - Transferring medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transferring medium, which is used for manufacturing a magnetic information recording medium having an OVD excellent in decorativeness and can prevent the writing and reading errors of magnetic information and a working trouble by static electricity from developing. SOLUTION: The transferring medium has at least an OVD layer 12, a hiding layer 13, a magnetic layer 14 and a bonding layer 15 on a substrate 11. In addition, the hiding layer 13 is made of a thin film with no electric conductivity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer medium for manufacturing a magnetic information recording medium having magnetic information, such as a credit card or a cash card, which requires a forgery prevention effect. More specifically, an OVD image formed with an OVD image to impart a forgery prevention effect to the magnetic information recording medium
The present invention relates to a transfer medium for manufacturing a magnetic information recording medium having the following.

[0002]

2. Description of the Related Art A hologram, a diffraction grating, and a thin film having different optical characteristics, which can express a three-dimensional image or a special decoration image using light interference, cause a color change (color shift) depending on a viewing angle. OVD like multilayer thin film
(Optical Variable Device) is under development.

[0003] OVDs such as holograms and diffraction gratings are:
It is composed of a diffractive structure such as a fine concavo-convex pattern or a striped pattern having a different refractive index. This allows a unique image to be formed according to the angle viewed by light diffraction and interference (that is, the angle supporting the hologram). Or color change (color shift). On the other hand, a multilayer thin film has a structure in which ceramics and metal materials having different optical properties are stacked in multiple layers. This multi-layer thin film is a display technology that uses the interference of light obtained by the optical characteristics and film thickness of the constituent materials, and has reflection and transmission characteristics in a specific wavelength range. Occurs.

[0004] In the present specification, display technologies utilizing light interference such as holograms, diffraction gratings and multilayer thin films are collectively referred to as OVD.

[0005] These OVDs have an excellent decorative effect because they give unique impressions such as stereoscopic images and color shifts, and are used for general printed materials such as various packaging materials, picture books, catalogs and the like. Further, since this OVD requires advanced manufacturing technology, it is formed and used in credit cards, securities, certificates, etc. as effective counterfeit prevention means. Recently, some media have been formed on the entire surface of a medium by paying attention to the decorative effect of OVD.

On the other hand, cash cards and credit cards, which are information media having a magnetic information recording section, have been attempted to conceal the color of a black or brown-colored magnetic tape and to produce a card having no design restriction. As the method, a method of matching the color of the card itself with the color of the magnetic tape or a method of printing a pattern after applying a concealing ink such as white, black or silver from above.

In the former case, there is a problem that the design is limited because the color is limited. In the latter method, the width of the design is widened, but the thickness of the concealment and printing is increased, so that there is a problem that the magnetic output is reduced. Especially when the above-mentioned OVD is formed on a pattern print,
Since the thickness of the OVD is increased, the output is reduced, and there is a problem that a reading error is likely to occur. To give a specific example, a magnetic card such as a credit card having a magnetic stripe depends on the performance of a magnetic tape, but generally has a problem that printing of about 6 μm is a limit and the printing must be less than that.

[0008] Such a magnetic information recording medium provided with OVD having a high anti-counterfeiting effect has been difficult to read. According to JP-A-9-29443, the concealing layer is made of Al
There has been proposed a configuration in which the output is not reduced even if an optical diffraction image (hologram or diffraction grating) is formed by forming a thin film by forming a thin metal film such as Ni or Ni. However, this structure has a structure in which a metal, which is a conductor, and a plastic material, which is an insulator, are laminated on the information medium. Since the structure easily accumulates electric charges, it causes various problems due to static electricity at the time of processing. When writing or reading data, an error is likely to occur due to discharge of electric charge.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and is directed to a transfer medium used in the manufacture of a magnetic information recording medium having an OVD which is excellent in decorativeness. It is an object of the present invention to provide a transfer medium that can prevent writing and reading errors of magnetic information and problems during processing.

The invention according to claim 1, which has been made to solve the above problem, is a transfer medium having at least an OVD layer, a concealing layer, a magnetic layer, and an adhesive layer on a substrate, wherein the concealing layer is This is a transfer medium characterized by being formed of a thin film having no conductivity.

According to a second aspect of the present invention, there is provided a transfer medium having at least a printing layer, an OVD layer, a concealing layer, a magnetic layer, and an adhesive layer on a substrate, wherein the concealing layer has conductivity. This is a transfer medium characterized by being made of a thin film that has not been made.

According to a third aspect of the present invention, in the transfer medium according to the first or second aspect, the thin film forming the concealing layer is a metal thin film having an island structure. is there. Each island of the thin film constituting the concealment layer has conductivity, but since the islands are separated from each other, the film itself has a property of not exhibiting conductivity.

According to a fourth aspect of the present invention, in the transfer medium according to the first or second aspect, the thin film constituting the concealing layer comprises a dielectric thin film such as a metal oxide. is there. This dielectric thin film such as a metal oxide also has a property of not exhibiting conductivity.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a cross-sectional view showing a configuration of an embodiment of a transfer medium according to the present invention. FIG. 2 is an embodiment of a magnetic information recording medium using the transfer medium of the present invention.
(A) is a plan view, and (B) is a cross-sectional view of the magnetic information recording medium of (A) taken along line XX. Hereinafter, a detailed description will be given with reference to these drawings.

The transfer medium (10) shown in FIG. 1 has a release protective layer (16) and a print layer (1) on a transfer medium substrate (11).
7), OVD layer (12), concealment layer (13), magnetic layer (1
4) and an adhesive layer (15). However, among the above-mentioned layers, the release protective layer (16) and the printed layer (17)
Is not an indispensable requirement and is provided as needed. FIG. 2 shows the transfer of the transfer medium (10) to the transfer-receiving substrate. After the transfer, it can be used as a magnetic information recording medium, and the state after the transfer is referred to as a magnetic information recording medium (20). The magnetic information recording medium (20) shown in FIG. 2 has a magnetic layer (24), a concealing layer (23), and an O layer on a substrate (21) to be transferred via an adhesive layer (25).
VD layer (22), printing layer (27), release protection layer (26)
, And only the pictures and characters of the print “☆” and “IDCARD” and the pattern of “BANK” as the OVD (22) can be confirmed. The magnetic layer is below the hiding layer and cannot be seen.

As the transfer medium substrate (11), a synthetic resin such as polyethylene terephthalate, polyethylene naphthalate, polyvinyl chloride, polyester, polycarbonate, polymethyl methacrylate, polystyrene or the like, or a natural resin, paper, synthetic paper or the like is used alone. Although a composite of the above or in combination can be used, a polyethylene terephthalate film is generally used in general in consideration of heat resistance, workability, smoothness, cost, and the like.

The concealing layer (13) is a layer for concealing the magnetic layer (14) and is a thin film having no conductivity. For example, a metal thin film having an island-like structure or a thin film made of a ceramic material can be used. Hereinafter, these will be described in more detail. A metal thin film having an island structure is a thin film in which particles having a size of 0.02 to 1 μm are formed in an isolated island shape at intervals of about 0.001 to 0.5 μm, and the islands are separated from each other. In addition, the entire thin film does not exhibit conductivity. In addition, since the interval is very small, the film as a whole exhibits a characteristic of reflecting light, and the magnetic layer (14) can be concealed.

This thin film can be directly formed by a thin film forming method such as vacuum deposition, sputtering, ion plating or the like (Japanese Patent Publication No. 6-6783).
-Al alloy, Sn-Si alloy, Ti, Cr, Fe, N
Although i, Co, Si, Ge, etc. are mentioned, a metal with a low melting point or a noble metal is suitable for processing, and Sn, a Sn-Al alloy, and a Sn-Si alloy are preferable.

Another method of forming a thin film having an island structure is to use a material such as Al which is difficult to deposit with an island structure after forming a continuous thin film and then forming the island structure. It is also possible to manufacture by removing a thin film partially by etching. Any other method can be used as long as it is a known method capable of forming a thin film having an independent island structure, and is not limited.

On the other hand, the concealing layer using a dielectric material such as a metal oxide or a sulfide is made of, for example, TiO ₂ , Si ₂ O ₃ , Si.
O, SiO ₂ , Fe ₂ O ₃ , ZnS, MgO, Al ₂ O
₃ , ceramic materials such as AlF ₂ . These materials vary depending on the color tone and the degree of light transmission.
It is provided in a range of 0 ° to 10000 ° by a known thin film forming method such as vacuum deposition, sputtering, or ion plating.

[0022] These materials do not exhibit conductivity, and are susceptible to static electricity.
Media that are unlikely to cause problems due to
High lightness and poor concealment. However, TiO_Two, Si
_TwoO _Three, ZnS and other materials have the same refractive index as plastic materials
Therefore, when laminated with plastic materials,
It has the property of reflecting light at boundaries. Use this property
Reflection of light by preliminarily roughening the surface on which the thin film is to be formed
By increasing the area and scattering the reflected light
And a white hiding layer can be obtained.

The printing layer (27) is formed above the concealing layer so as not to be concealed by the concealing layer (23) when transferred. Therefore, in FIG. 1, the printing layer (17) is provided between the peeling protection layer (16) and the OVD layer (12). However, when the OVD layer is transparent and the pattern, characters, etc. of the printing layer are transferred to the substrate to be transferred, these patterns,
As long as characters and the like can be read, a printing layer may be provided between the OVD layer (12) and the concealing layer (13).

The transferred magnetic information recording medium (2
In (0), a portion indicated by printing “IDCARD” or “☆” is a printing layer, on which information such as a character, a symbol, or a character and a background that can be visually confirmed is printed.
This printing layer is provided by a known material and printing method,
When transferred, the printing layer (27) is on the magnetic layer (24), and if formed thick, it causes a decrease in magnetic output. The printing layer (27) is not an essential component, and may be provided if necessary depending on the application.

Next, the OVD layer (12) will be described in detail. The OVD layer (12) is a layer that forms an OVD image using the above-described light interference, and is a layer that forms a display body that causes a color shift in which a color changes depending on the expression of a stereoscopic image and a viewing angle. Among them, OVDs such as holograms and diffraction gratings include a relief type for recording interference fringes of light on a plane as a fine uneven pattern and a volume type for recording interference fringes in a volume direction.

In the relief type, a relief type master hologram composed of a fine concavo-convex pattern is generally produced by an optical photographing method, and a nickel press plate having the concavo-convex pattern reproduced by an electroplating method is duplicated. Mass replication is performed by a well-known method of heating and pressing this press plate on the hologram forming layer. This type of hologram is called a relief hologram.

Also, unlike a relief hologram,
There is a so-called volume hologram that records interference fringes in a volume direction using a recording material such as a photosensitive resin. In this type of hologram, a so-called Lippmann hologram is generally used, in which the refractive index of the photosensitive resin is changed in the volume direction to form a reflection hologram.

Further, unlike a hologram image capable of reproducing the three-dimensional image, a plurality of types of simple diffraction gratings are arranged in a minute area to form pixels, and a diffraction grating image such as a grating image or a pixelgram for expressing an image is also provided. In addition, mass replication is performed in the same way as a relief hologram, while the method is different from holograms and diffraction gratings.
Another example is a multilayer film system in which thin films of ceramics and metal materials having different optical characteristics are stacked and a color change (color shift) occurs depending on a viewing angle. Among these OVDs, in consideration of mass productivity and cost, a relief hologram (diffraction grating) or a multilayer thin film type is preferable. Hereinafter, these will be described in detail.

FIGS. 3 and 4 are cross-sectional views illustrating an embodiment of an information medium after transfer using the transfer medium of the present invention in the OVD mode. FIG. 3 shows an example in which a relief-type hologram or diffraction grating is used as an OVD, and a magnetic layer (34), an adhesive layer (35) is provided on a substrate (31) to be transferred.
Hiding layer (33), OVD layer (32), printing layer (37),
It has a configuration provided with a peeling protection layer (36). In this case, the OVD layer (32) includes an OVD forming layer (32a) and an OVD effect layer (32b), and the OVD effect layer (32b) includes a high refractive material thin film that reflects light so as to obtain more diffraction efficiency. It consists of a metal thin film. FIG.
FIG. 1 is a cross-sectional view of a multilayer structure in which a color shift occurs as OVD. The OVD layer (42) has a multilayer structure of thin films (42a, 42b, 42c) having different optical characteristics. As described above, the configuration of the OVD layer differs depending on the OVD forming method, and a configuration in which a plurality of materials are stacked depending on the form is adopted. Therefore, the configuration is not limited to FIGS. 3 and 4, but is an embodiment.

As described above, the relief type hologram (diffraction grating) is a system in which a press plate having a fine concavo-convex pattern is heated and pressed against the OVD forming layer (32a) to duplicate the pattern. Therefore, the OVD formation layer (32
a) is a material having good moldability by heat, hardly causing press unevenness, and providing a bright reproduced image, and is a thermoplastic resin such as a polycarbonate resin, a polystyrene resin, and a polyvinyl chloride resin, an unsaturated polyester resin, and a melamine resin. Or a thermosetting resin such as an epoxy resin or an ultraviolet or electron beam curable resin having a radically polymerizable unsaturated group, alone or in combination. In addition, any material other than the above can be used as long as it can form an OVD relief pattern.

When a relief type hologram (diffraction grating) is used, a reflection layer (OVD effect layer (32b) having a different refractive index from the polymer material used in the OVD formation layer (32a) is used to increase the diffraction efficiency. )) Is preferably provided. By providing the OVD effect layer (32b), the diffraction efficiency is improved, and a clearer image and color change are brought about. As a material to be used, Ti having a different refractive index is used.
High refractive index materials such as O ₂ , Si ₂ O ₃ , SiO, Fe ₂ O ₃ , ZnS, etc., and island-shaped thin films such as Sn, Al, etc., which have higher reflection effects, may be used alone or by laminating these materials. Can be used. As described above, a material that does not exhibit conductivity is used for these layers, and is not limited thereto. These materials are formed by a known thin film forming technique such as a vacuum evaporation method or a sputtering method or an etching method.
It is formed in about Å.

In addition to the above, as a material constituting the OVD effect layer (32b), the refractive index thereof is a polymer material (refractive index n = 1.3) used in the OVD formation layer (32a).
-1.5), as long as the material does not exhibit conductivity, it can be used even if an inorganic filler is dispersed in an organic material, an organic-inorganic composite, or an organic material other than the above-mentioned inorganic material. It is. These materials are formed by a known coating method such as gravure coating, die coating, screen printing or the like, or a printing method to have a thickness of about 0.1 μm to 10 μm. Further, any material other than the above can be used as long as it has a reflective property.

On the other hand, the OVD layer (42) formed by the multilayer thin film system shown in FIG. 4 is composed of the multilayer thin films (42a, 42b, 42c) having different optical characteristics as described above, It is formed by laminating as a ceramic thin film or a composite thin film formed by attaching them. For example, when thin films having different refractive indices are stacked, a thin film having a high refractive index and a thin film having a low refractive index may be combined, or a specific combination may be alternately stacked. A desired multilayer thin film can be obtained by a combination thereof.

The multilayer thin film layer is made of a material such as ceramics or metal, and is formed by laminating approximately two or more high-refractive-index materials and a low-refractive-index material having a refractive index of about 1.5 to a predetermined thickness. is there. Examples of materials used below are given. First, as ceramics, Sb ₂ O ₃ (3.0
= Refractive index n: the same applies hereinafter), Fe ₂ O ₃ (2.7), Ti
O ₂ (2.6), CdS (2.6), CeO ₂ (2.
3), ZnS (2.3), PbCl ₂ (2.3), Cd
_{O (2.2), Sb 2 O} 3 (2.0), WO 3 (2.
0), SiO (2.0), Si ₂ O ₃ (2.5), In
₂ O ₃ (2.0), PbO (2.6), Ta ₂ O
₃ (2.4), ZnO (2.1), ZrO ₂ (2.
0), MgO (1.6), SiO ₂ (1.5), MgF
₂ (1.4), CeF ₃ (1.6), CaF ₂ (1.3
_{~1.4), AlF 3 (1.6)} , Al 2 O 3 (1.
6), GaO (1.7) and the like, and examples of the metal material include a thin film having an island structure of a simple metal or an alloy, for example, Al, Sn, Sn—Al and the like.

Also, organic polymers having a low refractive index, for example, polyethylene (1.51), polypropylene (1.4)
9), polytetrafluoroethylene (1.35), polymethyl methacrylate (1.49), polystyrene (1.60) and the like can be used. By selecting at least one of these high refractive index materials or metal thin films having an island-like structure having a transmittance of 30% to 60% and at least one of low refractive index materials and alternately stacking them at a predetermined thickness, a specific thickness is obtained. It indicates absorption or reflection of visible wavelength light. In the thin film made of metal, the optical characteristics such as the refractive index change depending on the state of the constituent materials and the forming conditions. Therefore, in the embodiments of the present invention, values under certain conditions are used.

The above materials are appropriately selected based on optical characteristics such as refractive index, reflectance, transmittance, etc., weather resistance, chemical resistance, interlayer adhesion, etc., and are laminated as thin films to form a multilayer thin film. As a forming method, a known method can be used, and the film thickness, the film forming speed, the number of layers, or the optical film thickness (= n · d,
An ordinary physical vapor deposition method such as a vacuum deposition method or a sputtering method or a chemical vapor deposition method such as a CVD method, which can control (n: refractive index, d: film thickness) and the like, can be used.

As a method for forming a low refractive index organic polymer, known printing methods such as gravure printing, offset printing, and screen printing, and coating methods such as bar coating, gravure, and roll coating are known. Etc. can be used. In the present invention, only ceramics / metals are disclosed, but any material having a refractive index and a reflectance similar or similar to ceramics / metals can be used.

To give a specific example of the multilayer thin film layer, the layer thickness is in the range of 50 to 20000 °, and the layer structure of the thin film is a thin film made of the above-mentioned high refractive index material or metal material, for example, ZnS , TiO ₂ , ZrO ₂ ,
In ₂ O ₃ , SnO, ITO, CeO ₂ , ZnO, Ta
Thin films made of the above materials having a low refractive index such as ₂ O ₃ , Al, Sn, etc., for example, MgF ₂ , SiO ₂ , CaF ₂ , M
gO, Al ₂ O _3, etc., which are alternately laminated, and the number of laminated layers is 2 or more, preferably 2 to 9 layers. Note that the optical characteristics of the multilayer film vary depending on the materials and combinations used, and the present invention is not limited to this.

The release protection layer is a release layer in the transfer medium (10) of FIG. 1, and is an OV in FIG.
It has a role of protecting the D forming layer (22) and the printing layer (27) from damage, and is formed as necessary. As the resin used, for example, acrylic resin, urethane resin, vinyl chloride resin-vinyl acetate copolymer resin, polyester resin, melamine resin, epoxy resin, polystyrene resin, conventionally known resin such as polyimide resin A thermoplastic resin, a thermosetting resin, an ultraviolet or electron beam curable resin is used alone or as a mixture.

Further, in order to prevent print marks at the time of image formation by a thermal head or the like, a curing agent for crosslinking the resin, waxes such as polyethylene washes, carnauba wax, silicone wax, calcium carbonate, zinc stearate, silica , Pigments such as alumina and talc, silicone
Fats and oils such as oils and fats can be added as long as the transparency is not impaired. The resin used for the release protective layer (16) is applied by a known application means such as a gravure printing method, a screen printing method, a nozzle coater method or the like, and a printing means such as an offset printing method or a flexographic printing method.

As described above, the configuration in which the adhesive layer / magnetic layer / concealing layer / OVD layer / printing layer / peeling protection layer is laminated as a transfer medium is an example, and each layer is formed according to the form of the product or the manufacturing method. It is possible to appropriately provide an adhesive layer or a printing layer on the top. The order in which the layers are stacked is not limited to the order described above. For example, a configuration having a printing layer on the OVD layer or a configuration in which the OVD effect layer also functions as the concealing layer may be used. On the other hand, it is also possible to add a configuration in which a latent image is provided with a fluorescent coloring ink, an infrared ink, a liquid crystal polymer or the like in order to improve forgery prevention.

[0042]

EXAMPLES The present invention will be described in detail with reference to specific examples.

[Embodiment 1] A detailed description will be given with reference to a sectional view showing an embodiment of a transfer medium (10) for producing the magnetic information recording medium of the present invention shown in FIG. First, thickness 2
A transfer protection substrate (11) composed of a 5 μm polyethylene terephthalate film is coated with a release protection layer (16) having the following composition by a gravure method to a thickness of 1 μm, and a pattern is offset as a print layer (17) on the release protection layer. 1 by printing
Printing was performed with a thickness of about μm. After that, the OVD formation layer (12) is 1 μm by a gravure method and T
After forming iO ₂ by vacuum evaporation at 500 °, a rainbow hologram pattern was formed by pressing a relief type rainbow hologram stamper heated to 140 ° C. using a roll embossing method. Further, Sn was deposited as an concealing layer (13) in an island structure at 500 [deg.] To form a magnetic layer (1).
As 4), after transferring the 650 Oe magnetic tape, the surface was smoothed with a stainless steel plate to smooth the surface.
A heating and pressing was performed at a pressure of 50 kg / cm ² at 100 ° C for 30 minutes. Finally, as an adhesive layer (15), a varnish containing Solvain A (vinyl chloride-vinyl acetate copolymer resin manufactured by Nissin Chemical Co., Ltd.) as a main component was dried to a thickness of 2%.
μm to obtain a transfer medium.

<Composition of release protective layer> Acrylic resin 20 parts Polyethylene wax 2 parts MEK (methyl ethyl ketone) 39 parts Toluene 39 parts <OVD forming layer composition> Polyester 20 parts HMDI (hexamethylene diisocyanate) 5 parts MEK (methyl ethyl ketone) 50 parts Toluene 25 parts <Composition of release protective layer> Urethane acrylate 50 parts Acrylate monomer 45 parts Photopolymerization initiator 5 parts

Subsequently, the surface of the adhesive layer (15) of the obtained transfer medium (10) was overlaid on a 760 μm-thick vinyl chloride sheet as a material to be transferred, and a pressure of 9.8 MPa (100 kg / c) was applied.
m ² ), after transferring by heating and pressing at a temperature of 120 ° C. for 30 minutes, removing the transfer medium substrate (11),
A magnetic card having the configuration shown in FIG. 3 was obtained by punching to the JIS standard.

In the magnetic card thus obtained, no magnetic layer was confirmed in appearance, and the magnetic card could be concealed by only 500 ° Sn vapor deposition. A good magnetic output was obtained because the thickness of the print on the magnetic tape was about 3.0 μm. In addition, since no electric charge is accumulated in the stacked state and no sudden discharge of electricity occurs, the work is easy, and no error occurs even if magnetic information is written and read several tens of times.

[Embodiment 2] A detailed description will be given with reference to a sectional view showing an embodiment of a transfer medium for manufacturing the magnetic information recording medium of the present invention shown in FIG. Example 2 Example 2 was repeated in the same manner as in Example except that the OVD layer (12) was a multilayer thin film.
Got a magnetic card.

As this multilayer foil thin film, ZnS-400
ＳｉＯ, SiO ₂ -5800Ｓ and ZnS-800Å were sequentially formed to form an OVD layer (12).

In the magnetic card thus obtained, no magnetic layer was confirmed in appearance, and the magnetic card could be concealed by only 500 ° Sn vapor deposition. A good magnetic output was obtained because the thickness of the print on the magnetic tape was about 6.0 μm. In addition, since no electric charge is accumulated in the stacked state and no sudden discharge of electricity occurs, the work is easy, and no error occurs even if magnetic information is written and read several tens of times. On the other hand, in this embodiment, the OVD of the multilayer thin film is used.
Since the layer was formed, a highly decorative card whose color changed depending on the viewing angle was obtained.

[0050]

As described above, the use of the transfer medium of the present invention allows the magnetic information recording medium to cover the magnetic layer with a thin film that does not exhibit conductivity, so that the OVD is formed. Regardless, it is possible to provide a medium that can provide a sufficient magnetic output and that does not cause a problem at the time of handling or an error when writing or reading magnetic information. In other words, the magnetic layer is not apparent in appearance, can be concealed, does not accumulate charges in a stacked state, and does not rapidly discharge static electricity. This is an information recording medium that does not cause an error.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a transfer medium of the present invention.

FIGS. 2A and 2B show an embodiment of a magnetic information recording medium manufactured using the transfer medium of the present invention, wherein FIG. 2A is a plan view and FIG. 2B is a cross-sectional view taken along line XX.

FIG. 3 is a cross-sectional view showing one embodiment of a magnetic information recording medium manufactured using the transfer medium of the present invention.

FIG. 4 is a cross-sectional view showing one embodiment of another magnetic information recording medium manufactured using the transfer medium of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Transfer medium 11 ... Transfer medium base material 12 ... OVD layer 13 ... Hiding layer 14 ... Magnetic layer 15 ... Adhesive layer 16 ... Peeling protection layer 17 ... Print layer 20 ... Magnetic information recording medium 21 ... Substrate to be transferred 22 ... OVD Layer 23 ... Hiding layer 24 ... Magnetic layer 25 ... Adhesive layer 26 ... Exfoliation protection layer 27 ... Print layer 30 ... Magnetic information recording medium 31 ... Substrate to be transferred 32 ... OVD layer 32a ... OVD formation layer 32b ... OVD effect layer 33 ... Hiding layer 34 Magnetic layer 35 Adhesive layer 36 Peeling protective layer 37 Printing layer 40 Magnetic information recording medium 41 Substrate to be transferred 42 OVD layers 42a, 42b, 42c Thin film layer 43 Hiding layer 44 Magnetic Layer 45: Adhesive layer 46: Peeling protection layer 47: Printing layer

Continued on the front page F term (reference) 2C005 HA26 HB01 HB09 HB10 JA02 JA18 JB08 KA09 LA20 2H113 AA06 BA03 BA05 BB08 CA39 CA47 DA26 DA45 DA49 DA50 DA53 DA57 3B005 EA12 EB01 FB61

Claims (4)

[Claims] 1. A transfer medium having at least an OVD layer, a concealing layer, a magnetic layer, and an adhesive layer on a substrate, wherein the concealing layer is made of a thin film having no conductivity. Medium. 2. A transfer medium having at least a printing layer, an OVD layer, a concealing layer, a magnetic layer, and an adhesive layer on a substrate, wherein the concealing layer is a thin film having no conductivity. Transfer media. 3. The transfer medium according to claim 1, wherein the thin film forming the concealing layer is a metal thin film having an island structure. 4. The transfer medium according to claim 1, wherein the thin film forming the concealing layer comprises a dielectric thin film such as a metal oxide.