JPS61103287A - Information card - Google Patents

Abstract

PURPOSE:To obtain an information card with high density and high safety comparing with a magnetic card by recording information which will not need a change for the recording contents at the light recording part and recording information, which will need a change, at an IC recording part in the information card. CONSTITUTION:In the information card 1, the light recording part 3 and the IC recording part 4 are installed on a card substrate 2, and according to circumstances, a protective film 5 may be installed on a card substrate 2. As the card substrate 2, every material, which can be used as the usual card substrate, can be used. As the light recording part 3, the already known material can be widely used. The IC recording part 4 consists of an IC module in which an electric factor including as IC ship and a wiring circuit is unified, and the IC module is laid under the card substrate 2. An electrode for connecting with the external electric power source of the IC module is installed on the card surface. In this information card, for example, a seal pattern is recorded to the light recording part 3, and the changing item such as deposit balance is recorded in the IC recording part 4.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an information card, and more specifically, the present invention relates to an information card, and more specifically, it includes an IC recording section whose recorded contents can be changed, an optical recording section whose recorded contents cannot be changed or tampered with, and an optical recording section whose recorded contents cannot be changed or tampered with. Regarding an information card having.

[Technical Background of the Invention and Problems Therein] Conventionally, magnetic materials have been mainly used as recording materials embedded in cards such as credit cards and bank cards. Although this magnetic material has the advantage that information can be easily written and read, it has the problem that it can be easily distorted or altered, and high-density recording cannot be performed.

By the way, in order to solve the above-mentioned problems, information can be transmitted to the photosensitive material by subjecting the photosensitive material to pattern exposure to form an unexposed light-transmitting area and an exposed light-blocking area. Types of optical recording materials have been proposed in which information is written and this information is read by means of differences in light transmission.

On the other hand, there are attempts to read information not based on differences in light transmittance but based on differences in light reflectance.

For example, cards have been proposed that have a recording layer made of silver particles dispersed in a gelatin matrix. Information is written to the recording layer by irradiating the recording layer with a laser beam to form recording bits. This recording layer can be manufactured continuously using a coating method, and by using silver, uniform reflectance can be obtained over a wide wavelength range, making it possible to apply it to recording and reproducing devices that use laser beams of various wavelengths. It has an interest rate of

On the other hand, a so-called heat mode recording material has been proposed in which the recording layer of the recording material is irradiated with an energy beam such as a laser beam in a spot shape to change the state of a part of the recording layer. The recording layer used in this heat mode recording material is metal 11 such as tellurium or bismuth.
11. Organic thin films such as polystyrene and nitrocellulose, or tellurium low oxide films that utilize phase transition, are used. These recording materials do not require any development treatment after information is written, and can be read directly after writing.
It has the advantage of being capable of high-density recording and additional writing.

However, the light %l made of the above-mentioned optical recording material
For optical cards that have a recording section, once the information is written into the optical recording section, the written information cannot be changed. There was a problem that matters that required the following could not be recorded.

Further, in an optical card having an optical recording section, for example, it may be preferable that a portion corresponding to an index of written information is changeable information.

As described above, an optical card having an optical recording section has a problem in that information that needs to be changed cannot be written.

[Purpose of the invention]

The present invention is an attempt to solve the problems associated with the prior art as described above, and has the advantages of an optical card having an optical recording section, and also has the advantages of an optical card having an optical recording section. The purpose is to provide an information card on which necessary information can be written.

[Summary of the invention]

The information card according to the present invention includes an optical recording section and an I
This information card is characterized by having an IGIC recording section.In this information card, information that does not require a change in recorded content is recorded on the optical recording section, and information that requires a change in recorded content is recorded on an IC recording section.

[Detailed description of the invention]

Hereinafter, the information card according to the present invention will be explained using specific examples shown in the drawings.

As shown in FIG. 1, the information card 1 according to the present invention is formed by providing an optical recording section 3 and an IC recording section 4 on a card base material 2. A protective film 5 may be provided on the card base material 2.

As the card base material 2, any material that can be used as a base material for a normal card can be used. Specifically, polyvinyl chloride, vinyl chloride/vinyl acetate copolymer, polyvinylidene chloride, acrylic polymers such as polymethyl methacrylate, polystyrene, polyvinyl butyral, acetylcellulose, styrene/butadiene copolymer, polyethylene, Boria pyrene, polycarbonate, etc. are used. In some cases, iron, stainless steel,
Metal sheets of aluminum, tin, copper, zinc, etc., synthetic paper, paper, etc. may also be used. Furthermore, a laminate of the above-mentioned materials may also be used.

Examples of the optical recording section 3 include those exemplified below.
The known ones are widely used.

(a) An optical recording section made of a recording material such as a metal thin film such as tellurium or bismuth, an organic thin film such as polystyrene or nitrocellulose, or a tellurium low oxide film that utilizes phase transition; To write information,
The optical recording section is irradiated with an energy beam such as a laser beam in the form of a spot to change the state of a part of the recording section.Reading of the written information is carried out by irradiating the recording section with recording/reproducing light and using the reflected light. This is done by correlating and detecting the intensity and phase of light.

(b) An optical recording section formed by dispersing silver particles in a gelatin matrix, and information is written to this optical recording section by irradiating the recording section with an energy beam such as a laser beam to form recording bits. The written information is read out by irradiating the recording section with recording/reproducing light and detecting the intensity and phase of the reflected light in association with each other.

(C) An optical recording section in which a photosensitive material made of a compound having a photosensitive group such as a diazo group is dispersed in a matrix, and information is written by subjecting the optical recording section to pattern exposure and leaving the unexposed section. The written information is read by irradiating the recording section with recording/reproducing light and correlating the difference in light transmittance with the phase. This is done by detecting.

(d) (i) a base material for an optical recording material; (ii) a first recording layer provided on the lower surface of this base material and consisting of a light transmitting part and a light shielding part; (iii) a first recording layer of this first recording layer; and a second recording layer made of a reflective metal thin film layer provided on the lower surface of the card base material Ti.
The second recording layer is provided so as to be in contact with it.

A cross-sectional view of this optical recording section 3 is shown in Figure 2.1.
The optical recording material 3 shown in FIG.
A light transmitting section 7 and a light shielding section 8 provided on the lower surface of this base material.
A first recording layer 9 consisting of (C) a reflective metal provided on the lower surface of this first recording P9 - Thin i! The second recording layer 10 is composed of layers, and each layer will be explained in detail below.

As the base material 6 for optical recording material, optically transparent glass,
Any type of material can be used, such as ceramic, paper, plastic film, woven fabric, or non-woven fabric, but glass or plastic film is preferred from the viewpoint of productivity and smoothness. As plastics, cellulose derivatives, polyester resins, polycarbonate resins, vinyl resins, polyimide resins, acrylic resins, polyether resins, polysulfone 41m, polyamide resins, etc. can be used, and from the viewpoint of dimensional stability and smoothness. ,
Particularly preferred are cellulose triacetate, polyethylene terephthalate, polyimide, and the like. These base materials 6 may be subjected to pretreatment to improve adhesion, such as corona discharge treatment, plasma treatment, and primer treatment, if necessary.

The first recording section 9 includes a light transmitting section 7 and a light shielding section 8hl. The first recording section 9 is formed, for example, by exposing a photosensitive material in a pattern such that unexposed areas are light-transmissive and exposed areas are light-blocking, and then developed. In some cases, the first recording section 9 may be formed by exposing a photosensitive material in a pattern such that unexposed areas are light-shielding and exposed areas are light-transmissive, followed by development.

The photosensitive material is made of, for example, (a) a transparent resin as a binder, (b) a photodegradable development inhibitor having a diazo group or an azide group, and (c) a metal complex compound or metal compound that is reduced to become a metal development nucleus. It is configured. In this photosensitive material, the photodegradable development inhibitor having a diazo group or an azide group is preferably 1 to 100 parts by weight per 100 parts by weight of the transparent resin as a binder.
The metal complex compound or metal compound which is reduced to become metal development nuclei is present in an amount of 0.1 to 100 parts by weight, preferably 1 to 10 parts by weight. The above-mentioned development inhibitors I, 13, metal complex compounds, or metal compounds are dissolved or dispersed in a transparent resin as a binder, and are preferably dissolved.

As the transparent resin, either lipophilic or hydrophilic transparent resin can be used. Lipophilic transparent resins include polyvinyl acetate resin, vinyl acetate/acrylic acid ester copolymer resin, and acrylic lli! Examples include resins having ester groups such as /vinyl acetate copolymer resins and ethylene/vinyl acetate copolymer resins, resins having hydroxyl groups such as cellulose acetate, and modified vinyl acetate resins containing carboxylic acid groups or sulfonic acid groups.

Furthermore, in terms of optical recording properties, it is also effective to add cellulose derivatives such as nitrocellulose, which have the property of deforming in a heat mode, to these lipophilic transparent resins to increase sensitivity.

In addition, hydrophilic transparent resins include natural polymer compounds such as gelatin, casein, glue, gum arabic, and shellac, carboxymethyl cellulose, egg albumin,
Polyvinyl alcohol (partially saponified polyvinyl acetate),
P resins such as polyacrylic acid, polyacrylamide, polyvinylpyrrolidone, polyethylene oxide, and maleic anhydride copolymers are used, but other resins than those mentioned above can also be used as long as they are water-soluble or hydrophilic resins. The hydrophilic transparent resin used as a binder has such hydrophilicity that when a photosensitive material layer is formed using this transparent resin and brought into contact with a physical developer, the physical developer penetrates into the photosensitive material layer and physical development is possible. It is preferable that the

Furthermore, it is also effective to dissolve a low-molecular material such as nitrocellulose, which has a property of being easily deformed in a heat mode in terms of optical recording properties, in ethanol and then add the resulting solution to the above-mentioned hydrophilic transparent resin.

As the development inhibitor, a compound having a diazo group or an azide group is used. Examples of compounds having a diazo group include zinc chloride double salts or fluoroborate salts having a diazo group;
Or these compounds and bar...11 La1
Compounds which are condensation products exclusively 0 from Mualde 5 are preferred. More specifically, I)-N.

N-diethylaminobenzenediazonium zinc chloride double salt, D-N~ethyl-N-β hydroxyethylaminobenzenediazonium zinc chloride double salt, 4-morpholino-2
, 5-jethoxybenzenediazonium zinc chloride double salt,
4-morpholino-2゜5-dibutoxybenzenediazonium zinc chloride double salt, 4-benzoylamino-2,5-
Jetoxybenzenediazonium zinc chloride double salt, 4-(
4'-Methoxybenzoylamino)-2,5-jethoxybenzenediazonium zinc chloride double salt, 4-(p~toluylmercapto)-2,5-dimethoxybenzenediazonium zinc chloride double salt, 4-diazo-4'-methoxy In place of the zinc chloride double salt having a diazo group such as diphenylamine zinc chloride double salt, 4-diazo-3-methoxy-diphenylamine zinc chloride double salt, or the above zinc chloride double salt, the above borofluoride salt, sulfate, Phosphates can also be used.

As a compound having an azide group, p-azide
1 acetophenone, 4.4'-diazide chalcone, 2
．． 6-bis-(4'-azidobenzal)-acetone, 2
, 6-bis-(4'-7didobenzal)-cyclohexanone, 2.6-bis-(4'-7didobenzal)
-4-methylcyclohexanone, 2,6-bis(4'-
(azidostyryl)-acetone, azidopyrene, etc. can be used. Compounds other than those mentioned above can also be used as long as they have a diazo group or an azide group, and two or more of the above-mentioned compounds having a diazo group or an azide group can also be used in combination.

In addition, when using a compound having a diazo group, it is recommended to use a stabilizer that stabilizes this compound. Organic carboxylic acids and organic sulfonic acids can be used as this stabilizer, and more practically p - It is preferable to use toluenesulfonic acid or the like.

Next, the metal complex compound or metal compound which is reduced and becomes a metal development nucleus will be explained.

First, complex compounds of metals such as palladium, gold, silver, platinum, and copper are used as the metal complex compounds that are reduced and become metal development nuclei, and the ligands that serve as electron donors for these metals are usually Any known material can be used. Specifically, the following metal complex compounds are used.

Bis(ethylenediamine)palladium([) salt, dichloroethylenediaminepalladium(If) salt, dichloro(
ethylenediamine) platinum (Ye salt, tetrachlorodiamine platinum (TV) salt, dichlorobis(ethylenediamine) platinum (rV) salt, tetraethylammonium M (II
) salt, bis(ethylenediamine copper(I) salt.

Furthermore, as a ligand for forming a metal complex compound, it is preferable to use a so-called chelating agent that forms a cyclic structure by coordinating at two or more sites because the stability of the metal complex compound formed is high. be. Examples of chelating agents include primary, secondary or tertiary amines, oximes, imines, and ketones, more specifically dimethylglyoxime, dithizone, oxine, acetylacetone, glycine, Compounds such as ethylenediaminetetraacetic acid, nitriacetic acid, and uramyldiacetic acid are used.

Examples using the above chelating agent include bis(2,
2'-bipyridine) palladium(II) salt, bis(
acetylacetonato) palladium(II), his(N
, N-diethylethylenediamine) copper(If) salt, bis(2,2'-bipyridine) copper(I[) salt, bis(1
, 10-7 enanthroline) copper (I) salt, bis(dimethylglyoximate) copper (IF), bis(acetylacetonate) copper (■), bis(acetylacetonate)
Platinum (II) and the like are preferred.

As metal compounds that are reduced to give metal development nuclei, metal compounds such as water-soluble salts such as chlorides and nitrates of metals such as palladium, gold, silver, platinum, and copper are used. Specifically, they are used in electroless plating. Salts such as palladium chloride, silver nitrate, and gold tetrachloride contained in the 7 activator liquid are preferred, and among these, palladium salts are particularly preferred.

↑・1. As mentioned above, (a) a transparent resin as an inder, (b) a photodegradable development inhibitor having a diazo group or an azide group, and (c) a metal complex compound or metal that is reduced to become a metal development nucleus. The compound is mixed with a solvent selected depending on the transparent resin as a binder to obtain a viscosity of 10-100, which is suitable for application.
It is said to be a coating liquid for forming a photosensitive material layer having 0 centimeter void. This coating liquid for forming a photosensitive material layer is coated on the optical recording material substrate 6 to a film thickness of usually 0.1 to 30 tm to form a photosensitive material layer.

As a solvent for dissolving the transparent resin as a binder,
Various solvents can be used, but when using a hydrophilic transparent resin, water or a mixed solvent of water and a water-miscible solvent such as a lower alcohol, ketone, or ether is used. In addition, when using a lipophilic transparent resin, lower alcohols such as methyl alcohol, ethyl alcohol, and isopropyl alcohol, ketones such as acetone and methyl ethyl ketone, monoesters such as ethyl acetate and butyl acetate, and polar alcohols such as methyl cellosolve are used. Solvents with high viscosity are preferably used. jIn addition,
When using a hydrophilic transparent resin, it is desirable to perform hardening treatment after forming the photosensitive material layer in order to suppress elution of the binder and the like into the developer during physical development. For example, the hardening treatment can be carried out by pre-mixing the following compound in a coating solution for forming a photosensitive material in an amount of 0.1 to 50 parts per 100 parts of the transparent resin, or by adding an aqueous solution of the following compound to the coating solution that has already been formed. This can be done by coating on the photosensitive material layer.

Aj compounds such as potassium light bread and ammonium light bread; Cr compounds such as chromium light bread and chromium sulfate; aldehydes such as formaldehyde, glyoxal, glutaraldehyde, 2-methylglutaraldehyde, and succinaldehyde; 0-benzoquinone, p -benzoquinone, cyclohexane-1,2-dione, Schiff 0 pentane-1.2
- Epoxides such as diketone nitriglycidyl isocyanurate such as dione, diacetyl, 2,3-pentanedione, 2゜5-hexanedione, 2.5-hexanedione, etc.: tetraphthaloyl chloride, 4.4'-diphenylmethane disulfonyl Acid anhydrides such as chloride, 4.4′-diphenylmethanedisulfonyl chloride;
Tannic acid, gallic acid, 2,4-dichloro-6-hydroxy-5-triazine, and the general formula R2NPOx2
, R-N=C=N-R' (where R is an alkyl group having 2 to 6 carbon atoms, R' is (CH) N (CH3)3x
- group, X is F or CI, n is 1 or 2) phosphorus compound or carbodiimide; styrene/maleic acid copolymer, vinylpyrrolidone/maleic acid copolymer, vinyl methyl ether/maleic acid copolymer, Resins such as ethyleneimine/maleic acid copolymer, methacrylic acid/methacrylic acid nitrile copolymer, polymethacrylamide, methacrylic acid ester copolymer, glutaric acid, succinic acid, malic acid, lactic acid, citric acid, aspartic acid ,
Gelcolic acid, tartaric acid, etc.

In this way, the photosensitive material layer provided on the substrate 6 for optical recording material is pattern-exposed and then developed to form a light-transmitting area 7, which is an unexposed area, and a light-blocking area 8, which is an exposed area. A first recording layer 9 is formed.

Pattern exposure can be performed, for example, through a mask such as a photomask.

Alternatively, the light shielding portions 8 can be formed in a pattern by condensing the irradiation light into a beam and directly irradiating the photosensitive material layer.

The image information provided by the light transmitting section 7 and the light shielding section 8 in the first recording layer 9 functions as tracking and preformat when reading the information itself or the information.

In the exposed area of the photosensitive material layer, the photodegradable development inhibitor having a diazo group or an azide group is decomposed according to the amount of exposure to form a latent image.

;・111 Any light source can be used as long as it can decompose a compound having a diazo group or an azide group as the light source used during exposure, and usually ultra-high
Pressure mercury lamps are preferably used.

A latent image formed by decomposition of a compound having a diazo group or an azide group by pattern exposure as described above is brought into contact with an aqueous reducing agent solution to generate metal development nuclei. Note that in the unexposed area, the development inhibitor having a diazo group or an azide group is not decomposed, so even when it comes into contact with the reducing agent aqueous solution, no metal development nuclei are generated and it remains as a light-transmitting area.

Reducing agents used in this case include stannous chloride, stannous sulfate, sodium borohydride, borazane compounds such as dimethylamine borazane, diethylamine borazane, and trimethylamine borazane, borane, diborane, and methyldiborane. Borane compounds, hydrazine, etc. are used. Among these, acidic stannous chloride solution, stannous sulfate solution (Weiss solution), and sensitizer solution for electroless plating of reprints are particularly preferred, but in general, any strong reducing agent can be used.
1. Next, when the metal development nuclei thus obtained are brought into contact with a physical developer, the metal contained in the physical developer is reduced and precipitated around the metal development nuclei, and the light shielding portion 8 is formed. It is formed.

As the physical developer, an aqueous solution containing a water-soluble reducible metal salt and a reducing agent is used at a low temperature or in a heated state if necessary.

As the reducible metal salt, for example, water-soluble salts of group IIb metals such as nickel, cobalt, iron and chromium, and group Tb metals such as copper are used alone or in combination. It is also possible to obtain a tin or tin/copper metal layer by performing physical development with a steel salt solution and then performing displacement plating with stannous chloride or tin sulfate. Among these, nickel, copper, and tin are preferred in consideration of safety and preservability. However, unlike vapor deposition, small amounts of different metals and elements such as phosphorus and sulfur may be mixed in due to the purity of the raw materials, plating stabilizers, etc., but this does not particularly affect the properties as an optical recording material.

Specifically, the following are used as suitable water-soluble reducible metal salts.

Cobaltous chloride, cobaltous iodide, ferrous bromide,
Heavy metal halides such as ferrous chloride, nichrome bromide, nichrome iodide, cupric chloride; heavy metal sulfates such as nickel sulfate, ferrous sulfate, cobaltous sulfate, nichrome sulfate, cupric sulfate ; Heavy metal nitrates such as nickel nitrate, ferrous nitrate, cobaltous nitrate, ferrous nitrate, cupric nitrate; ferrus acetate, cobalt acetate,
Organic acid salts of metals such as chromic acetate and Kubrick formate.

These reducible heavy metal salts are contained in a physical developer solution, for example, 10
It is preferably included in an amount of ~10 (1/j!).

Examples of reducing agents include hypophosphorous acid, sodium hypophosphite, sodium borohydride, hydrazine, formalin, diethylamine borane, dimethylamine borane,
Trimethylamineborane, borane, diborane, methyldiborane, diborazane, borazane, borazine, t-butylamineborazane, pyridineborane, 2,6-luzidineborane, ethylenediamineborane, hydrazinediborane,
Dimethylphosphineborane, phenylphosphineborane, dimethylarsineborane, phenylarsineborane,
Dimethylstibine borane, diethylstibin borane, etc. can be used.

These reducing agents are contained in the physical developer in an amount of, for example, 0.1 to
It is preferable to use an amount of 5(1/j).

In order to prevent heavy metal ions generated by dissolving the above-mentioned reducible heavy metal salts from precipitating as hydroxides, hydroxyl acids such as monocarboxylic acids, dicarboxylic acids, malic acid, and lactic acid are added to the physical developer. Carboxylic acid: Contain one or more complexing agents consisting of specific carboxylic acids such as succinic acid, citric acid, aspartic acid, glycolic acid, tartaric acid, ethylenediaminetetraacetic acid, gluconic acid, sugar acid, and quinic acid. I can do it. These complex chloride forming agents are contained in the physical developer, for example, 1 to 'F:
100 g/j (preferably). In addition, the physical developer may contain acids, bases, etc. to improve the storage stability and operability of the developer and the quality of the resulting images. pH adjusters, buffers, preservatives, brighteners, surfactants, and the like are added as necessary according to conventional methods.

Among these additives, it is particularly preferable to use an ammonium salt or a pH adjuster consisting of an ammonium salt and ammonia as the pH adjuster, since increasing the pH with ammonia makes it easier to obtain gloss on the surface of the photosensitive material.

Physical development may also be carried out in a high temperature nickel plating bath at 65° C. to 90° C. using a sodium hypophosphite reducing agent or under fast plating conditions in the same plating bath. The image obtained at this time is, for example, salt 15% or r114I! By treating with a 5% aqueous solution of for about 5 minutes, it is also possible to selectively remove a portion of the transparent resin in the light transmitting portion.

In addition to the above-mentioned systems consisting of transparent resins, development inhibitors, and metal complexes or metal compounds, photosensitive materials include (a) silver halide, dry silver (
Silver salt materials represented by organic silver salts such as (registered trademark),
(b) combination systems of diazonium salts and couplers, (c) diazo materials such as Carba Film (registered trademark) and PD process (registered trademark) materials, (d) acrylic monomers, polyvinyl cinnamic acid, etc. Typical photopolymerizable and crosslinked photopolymer materials (e) Electrophotographic photoreceptors such as CdS, Zr)O, and polyvinylcarbazole that form toner images, or their transfer bodies, (f), that form frost images electrophotographic materials such as thermoplastic electrophotographic photoreceptors, (th) combination systems of leuco dye and carbon tetrabromide, (h) combination systems of Dylux (registered trademark) cobalt complex and leuco dye, ( Materials that form images of pigments or dyes, such as a combination system of oxalic acid secondary acid and iron salts, (nu) subiobiran, molybdenum tungsten compounds, etc., can be used.

Among the above-mentioned photosensitive materials, some types have light-shielding properties in exposed areas and light-transmitting properties in unexposed areas, while others have light-transmitting properties in exposed areas and light-blocking properties in unexposed areas. . In any case, any photosensitive material can be used as long as it is possible to perform recording consisting of a light-transmitting area and a light-blocking area by developing the exposed material as required.

As the light for irradiating such a photosensitive material, ultraviolet rays, visible light, infrared rays, X-rays, electron beams, etc. can be used.

Next, a reflective metal thin film 1 is placed on the first recording layer 9 formed as described above and consisting of the light transmitting part 7 and the light shielding part 8.
A second recording E10 consisting of 11 layers is formed.

The reflective metal thin film layer is Cr1Ti, Fe, Go.

Ni, Cu, 80, Au, Ge, AJ, Mg,
Sb, Te, Pb1Pd, Cd, Bi, Sn, Se,
It is formed using metals such as In, Ga, Rh, etc. alone or in combination of two or more.

When information is written on the second recording layer 510 made of a reflective metal thin film layer by irradiation with an energy beam, low melting point metals such as Te1Zn and Pb1Cd are used.

It is preferable that the reflective metal thin film is composed mainly of metals such as Bi, 3n, 3e, In1Ga, and Rb,
Especially Te-3e, Te-Se-Pb.

Te-Pb, Te-3n-8,5n-Cu, Te-Cu
, Te-Cu-Pb alloy is better.

Further, among these alloys, a Te-Cu alloy containing 5 to 40 atomic percent Cu or a Te-Cu -Pb alloy containing 5 to 40 atomic percent CU and 1 to 50 atomic percent PB to Cu. The alloy is particularly preferred when the wavelength of the readout irradiation energy beam is 65On1 or more. When a reflective metal thin film layer made of these alloys is used as the second recording layer, recorded bits with less disturbance at the outer periphery can be obtained, and the wavelength of the readout irradiation energy beam is 6500 nm or more, especially 700 to 90 nm.
In the case of 0 rv, a reflective metal thin film can be obtained which has excellent information read characteristics such that the reflectance at the bits, which are recorded parts, and the reflectance, that is, the relative reflectance, at the bits, which are unrecorded parts, are small.

Furthermore, 'Fl containing 1 to 40 atomic percent Cu
When the 3n-(:, u alloy is used, a reflective metal thin film with less disturbance in the outer periphery of the recording bit shape and low toxicity can be obtained.

When the second recording layer 10 consisting of 11 reflective metal thin layers is used simply as a reflective layer without writing information, AN, N
It is preferable to form the reflective metal thin film layer from a metal or an alloy having excellent magneto-optical properties.

In order to form such a reflective gold fill layer on the first recording layer, the above metal or alloy is prepared,
This may be formed on the first recording layer by a conventionally known method such as a sputtering method, a vacuum evaporation method, an ion blating method, or an electroplating method. The thickness of this reflective metal thin film layer is preferably 200 to 1000 Å.

In some cases, a multilayer film made of the above metals, such as an in
A multilayer film of a film and a Te1ll film can also be used as a reflective metal film. In addition, composites of the above metals and organic compounds or inorganic oxides such as Te-CH4, Te-C32, Te
-Styrene, S n -S O2, Ge 5-8n,
'7a film such as 5nS-8 or 5i02/T i
A multilayer film such as /S i 02 /AJ can also be used as the reflective metal film.

In addition, there are thin films made by aggregating pigments such as cyanine to give light reflectivity, films in which pigments or metal particles such as silver are dispersed in thermoplastic resins such as nitrocellulose, polystyrene, and polyethylene, or films made from thermoplastic resins such as pigments or metal particles such as silver. A reflective metal 1M9 having pigments or metal particles aggregated on its surface is used.

Furthermore, 10M compounds, 5bPa compounds, Mail compounds, and Gel! compounds whose reflectance changes due to phase transition caused by irradiation with energy beams! Compounds such as oxide, oxide, Sm oxide, Te oxide-Ge, and Te-8n can be used as the reflective metal thin film.

In addition, chalcogen or colored MoO2-Cu1
Mob3-8n-Cu was used as a reflective gold FKii film, and in some cases a bubble-forming organic thin film and metal Ml
! l! Multilayer bodies with 1 and 1 are also used as reflective metal thin films. .

GdCo, TbCo, GdF, which are magneto-optical recording materials
e, oyFe, GdTbFe.

GdFeB i, TbDyFelMnCuB i.

Cr O2B i S m E r G d I G
1GdB iGa IG, GdBFaB i IG, etc. can also be used as the reflective metal i# film.

It is also possible to use a combination of various types of reflective metal thin films as described above.

Next, the IC record wI4 will be explained. The IC recording section 4 is composed of an IC module in which electric elements including an IC chip and a wiring circuit are integrated, and this IC module is embedded in the card base material 2. Electrodes for connecting the IC module to an external power source are provided on the card surface.

In order to embed the IC module in the card base material 2, a recess suitable for embedding the IC module is cut out in the card base material 2, the IC module is fitted into the recess, and then both are bonded.

Note that the structure of this IC module and the method of embedding it in the card base material are conventionally known.

The information card 1 according to the present invention has the optical recording section 3 and the IC recording section 4 as described above, and in this information card, for example, a seal pattern, a fingerprint, a facial photograph, a voiceprint PIN number, etc. can be recorded. Items that do not require changes are recorded in the optical recording section 3, and items that change from moment to moment or require changes, such as the total deposit amount, deposit row, and usage history, are recorded in the IC recording section 4.

(Effects of the Invention) Since the information card according to the present invention has an optical recording section and an IC recording section, the following effects can be obtained.

(a)! Much higher density recording is possible than with standard cards.

(b) Matters that do not require change are recorded in the optical recording section, making it extremely difficult to amend this record and ensuring high security.

(C) Since items that change from moment to moment or require changes are recorded in the IC recording section, an extremely large amount of information can be recorded as an information card.

+)'4. □, @. □ Figure 1 is a sectional view of the information card according to the present invention, and Figure 2 is a cross-sectional view of the information card according to the present invention.
The figure shows one of the optical recording parts used in the information card according to the present invention.
FIG. 3 is an example cross-sectional view.

DESCRIPTION OF SYMBOLS 1... Information car k, 2... Card base material, 3... Optical recording part, 4... IC recording part

Claims (1)

[Claims] 1. An information card comprising an optical recording section and an IC recording section, wherein information that does not require a change in recorded content is recorded on the optical recording section, and information that requires a change in recorded content is recorded on the IC recording section.