JPS5919836B2 - Recording parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device that records an image or rewrites the recording by irradiating light and utilizing deformation of a contact (softening) point substance by evaporation, diffusion, or both. be.

It has long been known that when a film of organic matter such as oil is irradiated with infrared rays, it undergoes deformation through evaporation and diffusion, allowing images to be displayed or recorded.

Also. The applicant's earlier application (Japanese Patent Application No. 133420/1982)
As described in , a contact (softening) point substance is spread on a substrate with fine irregularities on the surface and irradiated with light.
Recording or rewriting of records using deformation due to evaporation, diffusion, or both of the above-mentioned collision (softening) point substance provides high resolution and allows recording to be rewritten an extremely large number of times. When recording is performed on a large number of recording members, or when recording is rewritten many times, the amount of evaporation is small. Contact (softening) point substances may adhere to the light source, the optical system that processes the light from the light source, and other parts, causing problems in guiding the light onto the recording surface or damaging other parts, such as the recording part. Interfering with the function of the moving mechanism. Further, the adhesion of dust on the recording film causes problems in recording and reproduction. An object of the present invention is to prevent a large amount of recording material from adhering to areas other than the recording portion of a recording device.

and to prevent damage and contamination of the recording surface.
In order to achieve the above object, the apparatus of the present invention basically has the following configuration.

The area containing the light source for writing and the recording area are separated by a partition wall, and the area where light enters the recording area from the area containing the light source is provided with a light-transmitting area (transparent area) that transmits the light necessary for recording.
window). This can prevent the recording material from adhering to areas other than the recorded area. Paraffin, wax, higher alcohol, higher fatty acid, etc. can be considered as the conflict (softening) point substance, but the present invention does not essentially depend on the properties of these substances.

A wide range of substances can be used as long as they are liquid or solid at room temperature, can adhere to the substrate, and do not damage the substrate. For example, metals including lead, tantalum, etc., alloys, chalcogenides, etc. can be used as recording materials. Depending on the application of the device of the invention, for example, the substrate may be made of a material with low thermal conductivity to prevent the spread of heat laterally to the imaging surface to increase resolution, or a material with a collision (softening) point may be used as the substrate. 6. Low melting (softening): Preventing diffuse reflection and refraction of light by using a material with a high transmittance without changing the refractive index.
It goes without saying that it is necessary to use a photopolymerizable material as the dot material, or to use a material with high transmittance to read light.

For example, glass or quartz glass is used as the substrate. To record images with this device. The light of the light source,
Through microfilm, etc. Low melting (softening) of this device
A point material or a light absorbing layer provided close to a low melting (softening) point material is irradiated, or a light that forms a hologram is irradiated.
．． It focuses light whose intensity is modulated according to image information. While scanning. Alternatively, by irradiating the recording surface while moving it, the low-melting (softening) point material is deformed by evaporation, diffusion, etc., or deformed by polymerization and evaporation of the unpolymerized portion by heating.

Especially in the case of deformation that is not due to polymerization. Since the sensitivity to light is relatively low, it is best to sensitize it6.One method is to provide auxiliary heating by providing a conductive material such as a transparent electrode in the vicinity of the low melting (softening) point material. Methods include providing a light absorption layer close to a low melting (softening) point substance, and applying high frequency voltage. Many methods are possible. Depending on the choice of material for the light absorption layer. It can absorb all kinds of light including ultraviolet light and 6 infrared light. If the thickness of the light absorption layer is selected appropriately, it can be made semitransparent. It is also possible to form an image using light of any wavelength and read out the image using light of the same wavelength. Deletion of records. If it is possible6. For example, low melting point (
A conductive material placed close to a material with a low melting (softening) point is heated by passing an electric current through it, and the material with a low melting (softening) point is diffused on the substrate. Return to a uniform film. Heating with the above electric current is performed to a high temperature. In the case of photopolymerizable low melting (softening) point substances, a low melting (softening) point substance is evaporated at high speed and simultaneously diffused on the substrate to form a uniform film with a reduced thickness.
This can be done by evaporating the film including the polymerized portion. Hereinafter, the present invention will be explained in detail with reference to Examples.

Example 1 As shown in FIG. 1, a transparent electrode 2 was placed on a glass substrate 1. A CdS film 3 is deposited thereon to a thickness of about 5000× while keeping the substrate at 200° C.

Approximately 20 pieces of quartz glass 4 are sputtered on top of it.
A film thickness of 00x is formed and unevenness is provided on this. On the other hand, a transparent electrode 7 was placed on a glass plate 6, and a quartz glass 8 was placed on top of it to a thickness of about 1500λ. Provide irregularities on this. To create the unevenness, first create the surface on which the unevenness is to be formed and its surroundings.
Apply a positive type (photodegradable) photoresist.

Next, as shown in FIG. 2, the laser beam from the He-Cd laser 12 is expanded by a beam expander 13 and divided into two by a half mirror 14, and the two beams are split using mirrors 15 and 16. Cross. The substrate 1 coated with the above photoresist is placed where the above two lights intersect.
1 and 6, the portions of the photoresist where the unevenness is to be formed are exposed to light using interference fringes. Next, it was rotated 90 times in a plane parallel to the surface on which the photoresist was applied. Expose the photoresist to the same interference fringes. By these influences. A 6-base eye-like photosensitive area is formed on the photoresist. After removing the photosensitive area with a developer, the quartz glass is etched with hydrofluoric acid to form fine irregularities in the shape of the base grains on the quartz glass. The depth of etching. The thickness should be about the same as that of a quartz glass film. Finally, remove the remaining photoresist. This creates unevenness. On the uneven surface of the substrate 1. Put on a small block of paraffin. Next, 6 substrate 1 and glass plate 6 are placed facing each other. Spacer 10,10″ surrounding the recording part
Press them together and seal them with adhesive. In this way, the present invention includes recording members 6, the first plate member 1, and the spacer 1.
and a second plate-like member 6 disposed opposite to the first plate-like member via a distance of 0.0,10''.
and a recording layer on at least one of the opposing surfaces of the second plate-like member. By configuring at least one of the plate-like members to be translucent, (1) it is possible to prevent recording material from adhering to areas other than the recording portion;

(2) It is useful for protecting the recording surface from damage. (3) Contamination (for example, dust adhesion) of the recording surface due to handling or atmosphere can be prevented. This can be extremely effective in practice.
Furthermore, of course, there is no adverse effect on the recording/reading characteristics. next.
A current is applied to the transparent electrode 2 to melt the paraffin mass.
It is spread over the uneven parts of the substrate to form a uniform film. (Paraffin film-5) Excess paraffin is evaporated and applied to the uneven quartz glass 8 on the transparent electrode 7 (paraffin film-9). The quartz glass 8 with unevenness is
Since it is heated by the heating of the transparent electrode 2, the paraffin is melted by this heat. Although it is possible to spread it uniformly by diffusing it, it is better to heat the transparent electrode 7 with an electric current. It can be spread evenly in a short time. To form an image, light with image information, that is, light that has passed through a mask of characters or figures, or light that forms a hologram, is irradiated through 6 glass plates 6, transparent electrodes, quartz glass irregularities 8, and paraffin 9. or glass substrate 1. Transparent electrode 2
irradiate through.

If the light is irradiated from the glass substrate 1 side, there is no risk of the light being scattered by intermediate layers. It is preferable in this respect. The wavelength of the above light is 5000X so that it is well absorbed by the CdS layer.
The shorter the better.

The light absorbed by the CdS layer generates heat, and the thermal energy is applied to the paraffin film to form an image by evaporation or diffusion from a high temperature area to a low temperature area. As described above, when light is incident and at the same time a current is applied to the transparent electrode 2, the temperature of the paraffin film is uniformly raised. Image formation is possible with weak light. Another method of forming an image using weak light is to apply a high frequency voltage between the transparent electrode 2 and the transparent electrode 7. Electrons and holes generated in the CdS layer by the light are agitated by a high-frequency voltage and generate heat, and this thermal energy is applied to the paraffin film. Paraffin membrane. Since the dielectric loss increases as the temperature rises, it is possible to amplify the thermal image using a suitable high frequency. It is also possible to use both the method of applying a high frequency voltage and the method of flowing a current through the six transparent electrodes. Another way to form an image. It is also possible to adopt a method in which laser light whose intensity is modulated according to the information to be recorded is focused and irradiated, and six lights are scanned, or six substrates are moved to sequentially form images.

In this case too. As described above, the light for recording or reading is irradiated from the glass substrate 6 side 6 or the glass substrate 1 side. It is better to focus the light from the side of the substrate that has the film that forms the image. The distance from the lens to the focal point can be shortened. A lens with a short working distance and a large numerical aperture can be used. Therefore, a high light collection rate can be obtained, which is advantageous for high-density recording. When a laser beam is made into many pulses using an optical shutter, an image is formed in the form of a collection of minute dots. The stronger the light hits the point, the larger and deeper the depression becomes. There are three methods for erasing images: In the first method, a current is applied to the six transparent electrodes 2 to rapidly evaporate the paraffin on the unevenness 4 and make it adhere to the unevenness on the six transparent electrode 7.

However, it is not necessary to evaporate all the paraffin on the unevenness 4. Immediately thereafter, a current is applied to the transparent electrode 7 to re-evaporate the attached paraffin, and the paraffin is deposited on the unevenness 4 on the transparent electrode 2 to form a uniform film. In the second method, first, a current is applied to the transparent electrode 7 to evaporate part or all of the paraffin adhering to the irregularities 8, and the paraffin is uniformly deposited on the paraffin film 5 on which an image is recorded as a change in film thickness.

Next, during or after cooling the transparent electrode 7, the paraffin film 5 is
The temperature of the paraffin is increased to rapidly evaporate the paraffin, and the paraffin is deposited on the uneven surfaces 8 again. Due to this. The paraffin film on unevenness 4} and unevenness 8 is. All become almost the same.
If the distribution of paraffin adhering to the unevenness 8 is not completely uniform, the transparent electrode 7 can be heated again to maintain a temperature slightly higher than the melting point of paraffin, and the paraffin can be spread uniformly by diffusion. The third method is to apply a current to 6 transparent electrodes 2 and record an image based on the difference in the thickness of the paraffin film 5.
This method maintains the temperature slightly higher than the melting point to restore it to a uniform film.

The paraffin slightly evaporated during image formation and erasing is attached to the unevenness 8 on the transparent electrode 7, so the transparent electrode 7 can be heated to return it to its original state when necessary. In all of these three methods, the unevenness 8 on the transparent electrode 7 is not necessarily required, but if there is an unevenness. If there is a risk that the distribution of paraffin on the recording surface may become uneven due to multiple recording rewrites,
By uniformly correcting the distribution of the paraffin that has arrived on the uneven surfaces 8 and returning it to the uneven surfaces 4, the distribution of the paraffin 6 can be made uniform. The third method takes a relatively long time to erase the image.

The second method is. The residual heat from erasing can be used to assist writing, and since writing can be performed while erasing, the time for rewriting (erasing and writing) can be greatly shortened.

Also. If, at an appropriate time after image formation, a part of the paraffin adhering to the irregularities 8 on the transparent electrode 7 is evaporated and transferred onto the paraffin film 5 on which the 6 images have been recorded, the 6 recordings can be erased and the next image can be erased. How to prepare for writing. This can be done simply by heating the rosette on the uneven surface 4. Erasing can be performed while writing using the heat generated during writing, resulting in even higher speeds. Since the paraffin adhering to the irregularities on the transparent electrode 7 can be almost uniformly transferred onto the paraffin film 5 on which the image has been recorded, this operation hardly disturbs the image. Note that in the above examples, the case where the recording material was varafine was explained. Depending on the type and purpose of the recording material, 6 transparent electrodes or a CdS layer for light absorption may be used. Needless to say, uneven portions on the substrate, uneven portions on the quartz glass plate, etc. for ensuring uniformity of the paraffin become unnecessary.

[Brief explanation of the drawing]

Figure 1 is. 1 is a sectional view showing the structure of a device that is an embodiment of the present invention. FIG. 2 is a diagram showing a method for forming irregularities on a quartz glass layer of the apparatus whose structure is shown in FIG. 1. 1: Glass substrate, 2: Transparent electrode. 3: CdS layer, 4: Unevenness of quartz glass, 5: Paraffin film with image recorded. 6
: Glass plate, 7: Transparent electrode 68: Unevenness of quartz glass 69
:Paraffin film. 10,101: Spacer 1. 11: A plate that forms unevenness. 12: He-Cd laser. 13: Beam expander 1 14: Half mirror 15, 16:
mirror.

Claims (1)

[Claims] 1 At least a first plate-like member and a second plate-like member disposed opposite to the first plate-like member, and at least one of the opposing surfaces of the first and second plate-like members one of the plate-like members is provided with a recording layer, at least one of the plate-like members is transparent, the first and second plate-like members, a spacer sandwiched between them, and an adhesive for bonding these together. A recording member characterized in that a recording area of a recording layer between the first and second plate-like members is substantially shielded from the outside by a material.