JPH02245765A - Information recording medium and method for reproducing information record - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an information recording medium that records information in the form of continuous tone (0.1) information and that can reproduce the information at any time.

[Conventional technology]

Conventionally, silver halide photography is known as a high-sensitivity photographing technique. In this photography method, the photographed image goes through a developing process and is recorded on a recording medium such as film, and to reproduce the image, a silver salt emulsion (photographic paper, etc.) is used or the developed film is optically scanned. This is done by, for example, reproducing the image on a cathode ray tube (hereinafter referred to as CRT).

In addition, electrodes are deposited on the photoconductive layer, the entire surface of the photoconductive layer is charged by corona charging in a dark place, and then exposed to strong light to make the photoconductive layer conductive in the areas exposed to the light. By leaking and removing the charge, an electrostatic latent image is optically formed on the surface of the photoconductive layer, and a toner having a charge opposite to the residual electrostatic charge (or a charge of the same polarity) is attached. There is an electrophotographic technology that involves electrostatic transfer to paper or the like and development, but this is mainly used for copying and cannot be used for photography due to its low sensitivity, and the photoconductive layer is used as a recording medium. Since the retention time of the electrostatic charge is short, it is common to develop the toner immediately after forming the electrostatic latent image.

[Problem to be solved by the invention]

Silver halide photography is an excellent means of preserving images of subjects, but it requires a developing process to form silver halide images, and image reproduction involves complex optical processes such as hard copy and soft copy (CRT output). physical, electrical, or chemical treatment is required.

With electrophotographic technology, the visualization of the obtained electrostatic latent image is easier and faster than with silver halide photography, but the storage time of the latent image is extremely short, and the resolution and image quality on the developing side are inferior to that of silver halide photography. .

Problems inherent in these technologies include a complicated processing process if the image recording is of high quality and high resolution, and a lack of storage function or basic deterioration of image quality if the process is simple.

The present invention is intended to solve the above problems, and has high quality,
In addition to high resolution, the processing process is simple and long-term recording is possible.
0) The objective is to provide an information recording medium that can arbitrarily and repeatedly reproduce information with an image quality that suits the purpose.

[Means to solve the problem]

To this end, the information recording medium of the present invention is characterized in that an insulating layer having charge transport properties is laminated on the electrode layer via a destructible charge injection prevention layer.

Further, this destructible charge injection prevention layer can be provided with a heat absorbing layer made of a dye or a pigment.

In the information recording and reproducing method of the present invention using the above-mentioned information recording medium, first, an information recording medium in which an insulating layer having a charge transporting property is laminated on an electrode layer via a destructible charge injection prevention layer is electrically charged by heating means. Information is recorded by destroying the injection prevention layer and making the destroyed charge injection prevention layer conductive, and information is reproduced by fully charging the upper surface of the insulating layer in the information recording medium. That is.

This heating means includes pattern exposure using a laser beam,
Or it can be by thermal head.

In another method for recording and reproducing information on an information recording medium of the present invention, first, an insulating layer having a photocharge generating property and a charge transporting property is formed on an electrode layer via a destructible charge injection prevention layer. The insulating layer surface of the laminated information recording medium and the photoconductive layer surface of the photoreceptor having a photoconductive layer laminated on the electrodes are placed facing each other, and pattern exposure is performed with a voltage applied between both electrodes.
An electrostatic charge pattern is formed on the insulating surface, and then the insulating layer surface is exposed to light from the front, and the charge injection prevention layer in the electrostatic pattern forming area is destroyed by discharge to become conductive and information is recorded. This method is characterized in that the entire top surface of the medium is charged, and the recorded information is reproduced.

In order to reproduce the recorded information, toner development may be used or surface potential reading may be used.

The information recording medium of the present invention will be explained below.

FIG. 1 is a cross-sectional view of the information recording medium of the present invention, and FIG. 2 is a cross-sectional view showing the manufacturing process of the information recording medium of the present invention.
In the figure, 3 is an information recording medium, 11 is an insulating layer having charge transporting properties, 12 is a destructible charge injection prevention layer, 13 is an electrode, and 14
15 is a conductive part, 15 is a support body, and 16 is a heating device.

The insulating layer 11, which has charge transport properties, functions as an insulating layer when no voltage is applied, but when a voltage is applied (this is also the case when forming an image!), charges are injected from the electrode. It has the function of easily moving the charge by twisting.

In the present invention, it is necessary to have hole transporting properties or electron transporting properties depending on the polarity of the charge applied during reproduction.

When the electrode is positive, amorphous selenium with good hole transport properties, or organic photosensitive materials such as hydrazone type, pyrazoline type, PVK type, carbazole type, oxazole type, triazole type, aromatic amine type, amine type, triphenylmethane type , polycyclic aromatic compounds, etc. may be used.

As for the formation method, in the case of a-3s, it can be formed by vapor deposition, sputtering method, etc., and amorphous selenium,
Amorphous selenium tellurium, amorphous arsenic selenium compound (a-AszSei), amorphous arsenic selenium compound (a-AszSes) + tellurium, etc. may be laminated in a single layer, multiple layers, or in combination with various amorphous selenium. In such cases, it is preferable to dissolve it in a solvent and apply it by a spinner coating method or the like.

When the electrode is negative, it is best to use zinc oxide, cadmium sulfide, etc., which have good electron transport properties, and the forming method is coating method or CVD method (Chea+1
Cal Vapor Deposition). As a coating method, zinc sulfide particles (particle size 1 to 100 μm) are dispersed in a binder and a solvent is added to coat the charge generation layer, or an organic metal such as diethylzinc or dimethylzinc is coated with oxygen gas. Mix in low vacuum (10-”~ITorr) and heat (1
It is preferable to perform a chemical reaction on a substrate heated to 50° C. to 400° C. and deposit it as a zinc oxide film.

When using the coating method, silicone resins, styrene-butadiene copolymer resins, epoxy resins, acrylic resins, saturated or unsaturated polyester resins, polycarbonate resins, polyvinyl acetal resins, phenolic resins, polymethyl methacrylate ( PM
MA) 0.1 to 10 parts of resin, melamine resin, polyimide resin, etc. are added to 1 part of the charge transport material to facilitate adhesion.

The film thickness is preferably 10 to 50 μm.

In the present invention, the combination of the types of electrodes described below and the above-mentioned insulating layer materials is important, and the inventors have found that charge injection properties differ depending on the types of electrodes described below. When polyvinylcarbazole is used, an Al electrode does not inject much charge, but when an ITO electrode is used, charge is easily injected. In the present invention, it is necessary to select a combination that facilitates charge injection when voltage is applied. be.

In addition, this insulating layer with charge transport properties may be a leading conductive material, and when such materials are irradiated with light, photocarriers (electrons, holes) are generated in the irradiated area, and especially in the electric field. It is also a layer where the effect is remarkable when there is.

The information recording medium electrode 13 is formed on a support unless a metal support is used, and the material thereof is not limited as long as the specific resistance value is 10 6 Ω·cm or less, and metal conductive films, An inorganic metal oxide conductive film or an organic conductive film such as a quaternary ammonium salt, which can be deposited by vapor deposition, sputtering, or CVD.
It is formed by methods such as methods, coating, plating, dipping, and electrolytic polymerization.

In the present invention, it is preferable to select a material that easily injects charge into the insulating layer that has charge transport properties as the electrode material. For example, when using an organic photoconductive material such as polyvinylcarbazole as the insulating layer, inorganic Oxide, for example indium-tin oxide (ITO) electrodes may be used.

Further, the thickness needs to be changed depending on the electrical properties of the material constituting iii and the applied voltage when recording information, but for example, in the case of aluminum, the thickness is about 100 to 3000.

When it is necessary for the electrode to enter information light from the bottom of the information recording medium, the electrode is required to have optical properties similar to those of the support. For example, if the information light is visible light (400 to 700 nm),
Transparent electrodes such as ITO (IntOs-5no), tin oxide, etc. are sputtered or vapor-deposited, or these fine powders are coated with ink with a binder, gold, aluminum, silver, nickel, chromium, etc. are vapor-deposited, Or a translucent electrode made by sputtering, tetracyanoquinodimethane (TCNQ)
A transparent electrode coated with polyacetylene or the like is used.

The above electrode material can also be used when the information light is infrared light (700 ns+), but depending on the case, a colored visible light absorbing electrode can also be used in order to cant visible light.

Furthermore, when the information light is ultraviolet light (400 ns or less), the above electrode materials can be used, but as a support, organic polymeric materials that absorb ultraviolet light, soda glass, etc. are not preferable, and quartz glass etc. It is preferable to use a material that transmits ultraviolet light. In such a case, it is preferable to form an antireflection layer such as magnesium fluoride or titanium oxide on the back surface of the substrate.

The information recording medium of the present invention is characterized in that a destructible charge injection prevention layer is provided between the electrode 13 and the insulating layer 11 having charge transport properties.

The destructible charge injection prevention layer is provided to prevent charges from moving from the electrodes to the insulating layer having charge transport properties when voltage is applied. There are two types of charge injection prevention layers: one is an insulating layer with a thickness that prevents charge from moving due to a so-called tunneling effect, and the other is a layer that utilizes a rectifying effect. It has a function of communicating the insulating layer and the electrode at that part and making it conductive by means of information writing by heating.

As a material for such a charge injection prevention layer, first, an inorganic insulating material such as TeOx is formed into a film with a thickness of 0.005 by glow discharge, vapor deposition, sputtering, etc. 1μm-1
Formed to 0 μm. Such a low melting point compound is heated and melted by laser irradiation, and can obtain conductivity depending on the degree of crystallization. In this case, continuous tone conductivity can be obtained depending on the degree of laser irradiation. It is something that can be obtained.

Other inorganic insulating materials include AszOi, BzO
s, B11Os, CdS, CaO, Ce0z, C
rabs,Coo%Ge0tsHf(h,Fez
es, Lag's, MgO, Mn0z, NdzO
s, Nbt's, PbO,5bzOz, 5ift
,5eat,Taxes ,Tilt,Won ,v,
ol, Y8O1, Y2O1, Zr0g, BaTi0=,
Alzos, B18TiOB, CaO-5rO, Ca
0-YxOs, Cr-5in, LLTaOl, PbT
iO3, PbZr0*, Zr0l-Co, Zr0z
-5iOx, AIN, BN%NbN, 5ia
L, TaN, TiN, VN, ZrN.

SiC, TiCS tag, Al4C3, SiN*-AlzO
Glow discharge, vapor deposition, sputtering, CV of s mixed crystal etc.
For example, 5tot formed to a film thickness of o, oi μm to 1 μm by the D method etc. cracks when heated with a thermal head, and it is possible to make the crack conductive by making the insulating layer having charge transporting properties conductive with the electrode. This allows (0/1) recording.

In addition, examples of organic insulating materials include polypropylene, polyethylene, vinyl chloride, vinylidene chloride, polyester,
Polyamide, modified PVA, acrylic polycarbonate,
There are resins such as silicone, and heat-shrinkable films such as polystyrene, polybutadiene, PET, polypropylene, polyethylene, vinyl chloride, polyamide, modified PVA, acrylic, and linear low-molecular-weight polyethylene films in film form, and spinner coating with solvents. If it is in the form of a film, it is formed on the electrode with an adhesive, adhesive, etc., and when heated by a thermal head, etc., the heated part contracts and becomes an insulating layer with charge transport properties. It has the property of communicating with the electrode.

The thickness of this layer needs to be, for example, 1000 Å or more so as not to cause a tunnel effect in order to prevent charge injection.

Furthermore, as a charge injection prevention layer, a charge transport layer having a charge transport ability opposite to the polarity of the electrode substrate by utilizing a rectifying effect may be provided. Anything that produces a phenomenon can be used.

Such a charge injection prevention layer includes a m-free insulating layer, an organic insulating layer,
It is formed of an organic-inorganic composite type insulating layer, and the film thickness is 0.1~
It is about IO μm. Specifically, when the electrode is negative, an amorphous silicon insulating layer doped with B, AI, Ga51n, etc., amorphous selenium, oxadiazole, pyrazoline, polyvinylcarbazole, stilbene, anthracene, naphthalene, tridiphenylmethane, triphenylmethane , an organic insulating layer formed by dispersing azine, amine, aromatic amine, etc. in a resin, and when the electrode is positive, P, N, As, Sb.

Amorphous silicon insulating layer doped with Bi etc., Zn
Glow discharge, vapor deposition, sputtering, C
It is formed by a method such as VD or coating.

If one or both sides of the charge injection prevention layer formed in this way or the charge injection prevention layer is an organic material, the layer may contain,
By providing a layer that generates heat by absorbing light from LEDs, laser beams, etc., optical writing can be performed using those light sources.For example, dyes, pigments, etc. can be dissolved or dispersed in a solvent, and if necessary, coated with a binder. Accordingly, the charge injection prevention layer can be easily destroyed. Such dyes and pigments include dyes such as direct dyes, acid dyes, basic dyes, metal complex dyes, vat dyes, sulfur dyes, naphthol dyes, disperse dyes, reactive dyes, fluorescent whitening dyes, and oxidative dyes. Pigments include W1-free pigments, phthalocyanine organic pigments, dyeing pigments, soluble azo pigments, insoluble azo pigments, polyazo pigments, bat pigments, and fluorescent pigments.

The support 15 is intended to strongly support the insulating layer having charge transport properties, but is unnecessary when the insulating layer 11 is in the form of a film. In this case, the electrode may be formed on one side of the film with a charge injection prevention layer interposed therebetween.

When providing a support, light transparency may also be required. When the information recording medium 3 takes the form of a flexible film, tape, or disk, a flexible plastic film is used, and when strength is required, a rigid sheet or inorganic material such as glass is used. be done.

In addition, if light transmittance is required, it is advisable to provide an anti-reflection film on the support.
It is preferable to form an inorganic oxide such as titanium oxide in a single layer or in multiple layers.

Next, the first information recording method in the information recording and reproducing method of the present invention will be explained with reference to FIG. Figure 2 (a) shows a state in which the charge injection prevention layer is destroyed due to cracks or shrinkage, and Figure 2 (b) shows a state in which the charge injection prevention layer is destroyed due to it becoming conductive due to crystallization. 143 in Figure 0, which is a diagram showing the state, is! The part where the load injection prevention layer is missing,
Reference numeral 14b indicates a region where the charge injection prevention layer is crystallized, and 16 indicates a heating means.

First, as shown in FIG. 2(a), the first method of recording information on the information recording medium of the present invention is to
Alternatively, information is thermally input into the charge injection prevention layer from the bottom using a thermal head, etc., causing shrinkage or cracks in the W charge injection prevention layer material, and electrical conduction between the insulating layer having charge transport properties and the electrode. , it is possible to form a conductive part according to information, and information can be recorded in the form of a (0.1) signal.

Moreover, what is shown in FIG. 2 (b) is a case where the charge injection prevention layer is formed using a low melting point compound such as tellurium oxide, and in this case, when information is heated and applied by the heating means 16, The charge injection prevention layer melts at that location and crystallizes as it cools, and information can be recorded in analog form by utilizing the fact that it becomes conductive depending on the degree of crystallization.

When a light-absorbing heat-generating substance such as a dye or pigment is present near or in the charge injection prevention layer, optical recording using a laser or the like is possible.The recording method uses an argon laser (
514,488 nm), helium-neon laser (
633nm), semiconductor laser (780nm, 810nm)
m, etc.) can be used, and laser exposure corresponding to image signals, character signals, code signals, and line drawing signals is performed by scanning from above or below the information recording medium.

Analog recording such as images is performed by modulating the light intensity of the laser, and digital recording such as characters, codes, and line drawings is performed by controlling the laser light 0N-OFFIII, and halftone dot formation in the image. The dot generator is formed by applying dot generator ON-OFF control to laser light.

Note that a laser can also be used in the information recording method using a photoreceptor, and in this case, the spectral characteristics of the photoconductive layer do not need to be panchromatic ink, but should be sensitive to the wavelength of the laser light source. That's fine.

Next, the second information recording and reproducing method of the present invention will be explained with reference to FIG. layer 11 is an insulating layer having photocarrier generation and carrier transport ability;
17 is T4a.

First, as shown in FIG. 3(A), a transparent photoreceptor electrode 7 made of 1TO with a thickness of 1,000 layers is formed on a photoreceptor support 5 made of glass with a thickness of, for example, 1 fl, and a 10 μm thick transparent photoreceptor electrode 7 is formed on this.
A photoreceptor l having a photoconductive layer 9 formed thereon is prepared. The information recording medium 3 is placed with respect to the photoreceptor 1 with a gap of about IO μm in between.

In FIG. 3, exposure is performed from the photoreceptor 1 side! 3
This is Mr. i. As shown in FIG. 3(a), a voltage is applied between the electrodes 7 and 13 by the power source 17. In a dark place, the photoconductive rM9 on the photoconductor is a high resistance material, so no change occurs between the electrodes. The conductive layer 9 exhibits conductivity, and discharge occurs between the conductive layer 9 and the insulating layer 11 having charge transport properties, and image charges are transferred to the information recording medium.

Next, as shown in Figure 3 (b), after taking out the medium, when the entire surface is exposed to light of a wavelength corresponding to the information recording medium, photocarriers are generated in the area where the image charge exists, and the image charge and Photocarriers of the same polarity are attracted to the information recording medium electrode and move to the interface of the charge injection prevention layer. By setting the voltage between the electrodes to a high voltage, a high electric field is generated between the charge on the electrode (if the surface potential is 100OV, the electric field strength will be a high electric field of 10' V/cn+). Discharge breakdown occurs in the portion of the charge injection prevention layer where the charge has moved, and the insulating layer having charge transporting properties and the electrode communicate with each other, thereby making the charge injection prevention layer portion electrically conductive. In this case, the material for forming the charge injection prevention layer should have a film thickness (100
An insulating film with a thickness of 0 Å or more) may be used.

Next, a method for reproducing a recorded electrostatic image will be explained.

FIG. 4 is a sectional view of an information recording medium on which information is recorded.

To reproduce information from this information recording medium, first (
When the upper surface of the insulating layer 11 of the information recording medium is fully charged by corona charging or voltage application method using a counter electrode as shown in (a), as shown in (b) of the same figure, the missing part of the charge injection prevention layer is an electrode! Since the electrode is electrically connected to the charge transport layer, charge moves from the electrode, neutralizing the charge on the charge transport layer, and leaving the charge in the unpatterned area.

This charge can be developed with toner and used for electrostatic printing and the like. Information can be reproduced in a positive state.

FIG. 5 is a diagram showing an example of a potential reading method, which is another method in the information recording and reproducing method, and the same numbers as in FIG. 1 indicate the same contents. In addition, 21 in the figure is a potential reading part,
23 is a detection electrode, 25 is a guard bridge, 27 is a capacitor, and 29 is a voltmeter.

When the potential reading section 21 is placed to face the charge accumulation surface of the information recording medium 3 from above the protective film, an electric field generated by the charges accumulated on the insulating layer 11 having a charge transporting property of the information recording medium 3 is applied to the detection electrode 23. As a result, an induced charge equivalent to the charge on the information recording medium is generated on the detection electrode surface. Since the capacitor 27 is charged with an equal amount of charge of opposite polarity to this induced charge, a potential difference corresponding to the accumulated charge is generated between the electrodes of the capacitor, and by reading this value with a voltmeter 29, the potential of the charge carrier is determined. You can ask for it. Then, by scanning the surface of the information recording medium with the potential reading section 21, the electrostatic latent image can be output as an electrical signal. Note that if only the detection type pi 23 is used, an electric field (electric line of force) due to charges in a wider area than the area facing the detection electrode of the information recording medium acts and the resolution decreases, so a grounded guard electrode 25 is placed around the detection electrode. As a result, the lines of electric force are oriented perpendicularly to the surface, so that the lines of electric force only act on the area facing the detection electrode 23, and the area of the detection electrode is approximately reduced. It is possible to read the potential of equal parts. The accuracy and resolution of iZ position reading vary greatly depending on the shape and size of the detection electrode and guard electrode, and the distance from the information recording medium, so it is necessary to find and design optimal conditions according to the required performance.

In addition, the image charge on the information recording medium is irradiated with a laser beam or the like from the information recording medium electrode side provided with an anti-reflection film, and the information is reproduced through an electro-optic crystal using the modulation of the image charge of the laser light. Good too.

In this case, the information recording medium must be made of transparent materials for the support, electrodes, insulating layer having charge transporting properties, insulating layer, and protective layer. Further, an electro-optic crystal is preferably disposed in the optical path, and as such an electro-optic crystal, it is preferable to use a material having an electro-optic effect such as barium titanate or lithium tantalate (LiTa0s).

FIG. 6 is a diagram showing a schematic configuration of an electrostatic image reproduction method, in which 61 is a potential reading device, 63 is an amplifier, and 65 is a CR
T, 67 is a printer.

In the figure, a potential reading device 61 detects the charge potential, and an amplifier 63 amplifies the detected output, which can be displayed on a CRT 65 and printed out using a printer 67. In this case, it is possible to arbitrarily select and output the part to be read at any time, and it is also possible to reproduce it repeatedly.

Furthermore, since the electrostatic latent image is obtained as an electrical signal, it can also be used for recording on other recording media, etc., if necessary.

[Action and effect of invention]

The information recording medium of the present invention is formed by laminating an insulating layer having charge transporting properties on an electrode layer via a destructible charge injection prevention layer, and a heating means such as a laser beam or a thermal head is used to record information. By using this as a means, it is possible to destroy the charge injection prevention layer in the heated area and make the area conductive. Therefore, it is possible to convert the image charge into a form with or without a charge injection prevention layer and to store it, and it is possible to permanently store information as an information recording medium.

Furthermore, when reproducing information, it is possible to easily reproduce the information by charging the entire surface of the information recording medium each time.

That is, when the entire surface of the information recording medium is charged, the image charge leaks due to the electric field formed by the image charge in the information recording area where the charge injection prevention layer is missing, and the charge is generated only in the area where no information is recorded. can remain, and this charge can be regenerated.

Examples will be described below.

[Example 1] On a glass substrate (1 u thick) spuntered with In2O2-Snow to a thickness of about 1000, Sing was formed as a charge injection prevention layer to a thickness of 0.2 μm by the same Svanta method.

Next, on this charge injection prevention layer, a laser light absorption layer was formed by dissolving Crystal Bioleft (Junsei Kagaku) in tetrahydrofuran to make a 1% solution, and using a spinner coating method (1000 rpm, 30 s) to form a film with a thickness of 0.05 μm. Apply to.

Next, on the formed laser light absorption layer, 10 g of poly-N-vinylcarbazole (manufactured by Asuka Co., Ltd.), 2,
4. A mixed solution having a composition of 10 g of 7-trinitrofluorenone, 2 g of polyester resin (binder: Byron 200 manufactured by Toyobo Co., Ltd.), and 90 g of tetrahydrofuran (THF) was prepared in a dark place and applied using a doctor blade. and dried with ventilation at 60°C for about 1 hour to form a film with a thickness of about 10 μm.
An information recording medium having an insulating layer having a charge transporting property of 1 was obtained.

(Example 2) A biaxially stretched polyethylene film was laminated onto the electrode using an adhesive as a charge injection prevention layer on a PET film substrate (100 μm thick) on which Into Co Snug was sputtered to a thickness of about 1000. (Film thickness: 5 μm) Next, on this charge injection prevention layer, 10 g of poly-N-vinylcarbazole (manufactured by Anan Perfumery Co., Ltd.), 10 g of 2.4.7-trinitrofluorenone, 10 g of polyvarnish fl mFIM,
A mixed solution containing 2 g (binder: Byron 200 manufactured by Toyobo Co., Ltd.) and 90 g of tetrahydrofuran (THF) was prepared in a dark place, applied using a doctor blade, and dried with ventilation at 60°C for about 1 hour. The film thickness is approximately 10 μm.
An information recording medium having an insulating layer having a charge transporting property of 1 was obtained.

[Example 3] On a glass substrate I (1 m thick) sputtered with In2O2-5nO1 to a thickness of approximately 1000 nm, tellurium oxide was sputtered as a charge injection prevention layer and Te was sputtered in an oxygen atmosphere to form a 1 μm thick film. was formed.

Next, on this charge injection prevention layer, 10 g of poly-N-vinylcarbazole (manufactured by Anan Kaori Co., Ltd.), 10 g of 2,4.7-)linitrofluorenone, and 2 g of polyester resin (binder: Vylon 200, Toyobo Co., Ltd. ) and tetrahydrofuran (THF) in a dark place and applied it using a doctor blade.
The mixture was dried with ventilation at a temperature of about 1 hour to obtain an information recording medium having a thickness of about 10 μm and having an insulating layer having charge transport properties.

[Example 4] As shown in FIG. 2(A), a He-Ne laser (633 nm) 1
Pattern scanning exposure was performed at 5 mW, spot diameter of 5 μmφ, and lQms. After the irradiation, the surface of the information recording medium was charged with corona at 16 KV, resulting in a surface potential of 0 in the exposed area and 450 V in the unexposed area. I developed it.

No toner was deposited on the area irradiated with the He-Ne laser, and clear (0.1) printing could be performed.

[Example 5] As shown in FIG. 3(A), the upper surface of the information recording medium produced in Example 3 and the organic photoreceptor (
PVK - TNF) 1 were stacked facing each other using a polyester film with a thickness of 10 μm as a spacer, and the photoreceptor side was negative and the insulation J
! ! Apply a DC voltage of -700v with the pole side being positive. With this voltage applied, pattern exposure was performed from the photoreceptor side for 1 second using a halogen lamp with an illuminance of 1000 lux as a light source, and after the exposure was completed, the voltage was turned off.

Next, take out the information recording medium, irradiate the entire surface with white light at 10 lux for 10 seconds, and then corona charge (-6
K V) was carried out, and the surface potential was read and measured as shown in Figure 6. As a result, the surface potential was 0 in the pattern exposed area and 1300 in the unexposed area, and when reproduced on a CRT, the pattern image was was played.

[Reference Example 1]...Organic photoreceptor (PVK-TNF'
) Preparation method Poly-N-vinylcarbazole 10g (manufactured by Anan Perfumery Co., Ltd.), 2.4.7-) Linitrofluorenone log,
2 g of polyester resin (binder: Byron 200 manufactured by Toyobo Co., Ltd.), 90% tetrahydrofuran (THF)
A mixed solution having a composition of g was prepared in a dark place, and IntOi-
Using a doctor blade, apply 3nO1 to a spuntered glass substrate (1 crane thickness) with a film thickness of approximately 1000 mm.
It was dried with ventilation at 60° C. for about 1 hour to obtain a photosensitive layer having an insulating layer with a thickness of about 10 μm. In addition, in order to completely dry the sample, it was further air-dried for one day before use.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the information recording medium of the present invention, FIG. 2 is a diagram for explaining one embodiment of the information recording method, and FIG. 3 is a diagram for explaining another embodiment of the information recording method. , FIG. 4 is a diagram for explaining recorded information reproduction, FIG. 5 is a diagram showing an example of a DC amplification type potential reading method, and FIG. 6 is a diagram showing a schematic configuration of electrostatic image reproduction according to the present invention. be. 1 is a photoconductor, 3 is an information recording medium, 5 is a photoconductor support, 7
1 is a photoreceptor electrode, 9 is a photoconductive layer, 11 is an insulating layer having charge transport properties, 13 is an information recording medium electrode, 14 is an information recording section, 15 is an information recording medium support, 16 is a heating means, and 17 is a power source , 18 is a pattern exposure light, 21 is a potential reading section,
23 is a detection electrode, 25 is a guard electrode, and 27 is a capacitor. Applicant Dai Nippon Printing Co., Ltd. agent, patent attorney (1) Nobuhiko (and 5 others) Engraving of the drawing (a) Engraving of the drawing, Figure 1 2vIJ (a) Engraving of drawings (a) (b) Figure 5 Procedural Dispute Manual (Method) % Formula % Relationship with the case of the person making the amendment

Claims (6)

[Claims] (1) An information recording medium characterized in that an insulating layer having charge transport properties is laminated on an electrode layer via a destructible charge injection prevention layer. (2) The information recording medium according to claim 1, further comprising a heat absorbing layer made of a dye or a pigment provided near or in the destructible charge injection prevention layer. (3) In an information recording medium in which an insulating layer having charge transport properties is laminated on an electrode layer via a destructible charge injection prevention layer, the charge injection prevention layer is destroyed by heating means, and the destroyed charge injection prevention layer is prevented. Record information by making the layer conductive,
An information recording and reproducing method characterized in that information is reproduced by fully charging the upper surface of an insulating layer in an information recording medium. (4) The information recording and reproducing method according to claim 3, wherein the heating means is pattern exposure using a laser beam. (5) An insulating layer surface in an information recording medium in which an insulating layer having photocharge generation and charge transporting properties is laminated on an electrode layer via a destructible charge injection prevention layer, and a photoconductive layer on the electrode. The photoconductive layer surface of a photoreceptor with laminated layers is placed facing each other, and pattern exposure is performed with a voltage applied between both electrodes.
An electrostatic charge pattern is formed on the insulating surface, and then the insulating layer surface is exposed to light from the front, and the charge injection prevention layer in the electrostatic pattern forming area is destroyed by discharge to become conductive and information is recorded. An information recording and reproducing method characterized by charging the entire top surface of a medium and reproducing the recorded information. (6) The information recording and reproducing method according to claim 3, 4 or 5, wherein the method for reproducing the recorded information is by toner development or by surface potential reading.