JP2000113516A - Optical information recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical information recording medium on which a label prepared by a user itself can be displayed with simple equipment. SOLUTION: This optical information recording medium is provided with a substrate 101 in which information is recorded or information can be recorded on one face, a reflecting film 103 formed so as to cover an information region 102 and an organic coloring material film 104 formed on the information region 102 covered with the reflecting film 103 and causing discoloration by being exposed. The organic coloring material film 104 displays an image pattern by the contrast of tint of exposed and unexposed parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical information recording medium capable of reproducing, recording, and reproducing information, and more particularly to an area capable of displaying an image pattern such as a character, a picture, and a photograph in addition to an information area. An optical information recording medium comprising:

[0002]

2. Description of the Related Art Conventionally, a compact disk (Compact Di
sc: CD) and CD-ROM (CompactDisc-Read Only)
In a read-only type single optical disk such as a Memory), a label including a title, a name of a manufacturer and a logo, and the like is displayed by ink printing on a surface opposite to a surface on which a recording signal is reproduced. In addition, the recordable CD (Compact Disc-Rec
In the case of single-plate optical discs such as ordable: CD-R), similarly to the above-mentioned CDs and the like, labels such as a manufacturer's name and a logo mark are printed by ink printing on a surface opposite to a surface on which a recording signal is reproduced. Is displayed. Also, write-once CDs have
In some cases, a user writing area is provided in which the content of information recorded by the user can be written as characters with a pen.

Further, as a next-generation multimedia medium following a CD, a D medium having a large recording capacity of about seven times or more that of a CD has been proposed.
VD (Digital Versatile Disc) has been launched and is becoming popular in the market. In DVDs, the size of pits for recording information is set to be slightly less than half of that of CDs in both the radial direction and the circumferential direction in order to increase the recording density compared to conventional optical disks. Further, in order to reduce the influence of the deterioration of the reproduction signal quality due to the warpage or bending of the disk, the thickness is set to 0.
Two 6 mm substrates are bonded together to increase the mechanical strength. The DVD can record information on one or both of the substrates to be bonded. Therefore, the structure of the optical disk is a single-layer single-sided reproduction optical disk, a single-layer double-sided reproduction optical disk, a double-layer single-sided reproduction optical disk,
It can be a layered double-sided reproduction optical disk.

Among them, DVD-5 which is a single-layer single-sided reproduction optical disk and DV-5 which is a double-layer single-sided reproduction optical disk
D-9 is a 0.6 mm thick substrate (information substrate) having a recording information area, and a 0.6 m thickness having no recording information area.
This is an optical disc having a structure in which m substrates (dummy substrates) are bonded together. In both DVD-5 and DVD-9, since information is reproduced from the information substrate side, information such as a title, a manufacturer / seller name, a logo mark and the like are recorded on the surface of the dummy substrate on which laser light is not incident, similarly to a CD or the like. Displayed by ink printing.

Further, a write-once type DVD (Digital Versatile) in which a user can record or erase information by himself / herself.
Disc-Recordable: DVD-R) and rewritable DVD
(Digital Versatile disc-Random Access Memory:
Also in DVD-RAM, labels such as the name of a manufacturer and a seller and a logo mark are displayed on the surface of the dummy substrate by ink printing, similarly to the above-described DVD-5 and the like. Also,
Some write-once DVDs and rewritable DVDs have a user write area in which the content of information recorded by a user can be written as characters by a pen or the like.

[0006]

However, the above-mentioned read-only optical disks such as CDs, CD-ROMs and DVDs, and write-once or rewritable optical disks such as CD-Rs, DVD-Rs and DVD-ROMs are described. There is a demand that a user wants to apply a designed label to an optical disc, not a label designed by a manufacturer and seller.

[0007] In order to satisfy the above demand, an optical disk on which no label is printed is released, and word processing software,
A method is conceivable in which a user himself creates a label using a personal computer on which drawing software or the like is installed and prints the label using a printer. But,
In order to purchase personal computers, printers, word processing software, drawing software, and the like, a cost of several hundred thousand yen or more is required, and not everyone can obtain them. Furthermore, since the optical disk has a thickness of 1.2 mm, there is a problem that a special printer must be used in order to directly print on the optical disk.

[0008] Even if these equipments are purchased, a certain level of skill is required in order to make full use of these equipments, and not everybody can necessarily create a label.

Further, a heat-sensitive layer made of heat-sensitive resin or paper is provided on the surface of the optical disk opposite to the reproduction surface,
A method in which the user applies heat to the heat-sensitive layer to display a favorite pattern may be considered. But CD
In addition, since the substrate of an optical disk such as a DVD is generally made of a resin such as polycarbonate, the substrate is deformed and melted by applying heat, and a label using a heat-sensitive layer is not practical.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has as its object to provide an optical information recording medium capable of displaying a label created by a user himself with simple equipment. .

[0011]

According to an aspect of the present invention, there is provided an optical information recording medium in which information is recorded on one side or information on which information can be recorded. A substrate having a region, a reflective film formed on the information region, and an organic dye film formed on the reflective film and discolored when exposed to light, wherein the organic dye film is exposed to light and unexposed. It is characterized in that an image pattern is displayed based on the contrast of the color of a part.

According to a second aspect of the present invention, there is provided an optical information recording medium, comprising: a first substrate having information recorded on one side or having an information area capable of recording information; A first reflection film formed, a second substrate, an organic dye film formed on one surface of the second substrate and discolored by being exposed to light, and a second substrate formed on the organic dye film. A reflective film, and an adhesive layer for bonding the first substrate and the second substrate with the first reflective film and the second reflective film facing each other, wherein the organic dye film is a photosensitive portion. And an image pattern is displayed based on the contrast of the hue of the unexposed portion.

According to a third aspect of the present invention, in an optical information recording medium, an information area in which information is recorded or information can be recorded on one side and a non-information area formed outside the information area. Having a substrate, an organic dye film formed on the non-information region and discolored by being exposed to light, and a reflective film formed over the non-information region where the information region and the organic dye film are formed. The organic dye film displays an image pattern based on the contrast of the hue of the light-exposed portion and the unexposed portion.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram for explaining a cross-sectional structure of an optical information recording medium according to a first embodiment of the present invention. 101 is a substrate, 102 is an information area, 103 is a reflective film, and 104 is an organic dye film. The substrate 101 is made of polycarbonate resin, acrylic resin, glass, or the like having an outer diameter of 120 mm, an inner diameter of 15 mm, and a thickness of 1.2 mm.
mm.

In the case of a read-only optical disk, the information area 102 is composed of a spiral or concentric pit row. In the case of a write-once optical disk, a spiral or concentric guide groove and a guide groove are formed. The guide groove is formed of an organic dye film made of a cyanine dye, a phthalocyanine dye, an azo dye, or the like formed on the guide groove. Ge-Te-S formed on the guide groove
It is composed of a phase change recording film such as a b-based material, an In-Sb-Te-Se-based material, and an inorganic dielectric film.

The information area 102 is made of aluminum (A
1), a reflective film 103 made of gold (Au) or the like. The reflective film 103 is formed with a thickness of 50 to 150 nm by a sputtering method, an evaporation method, or the like.

On the reflection film 103, an organic dye film 104 that changes color when irradiated with light is formed. As the organic dye film 104, an organic dye material such as a cyanine dye, a phthalocyanine dye, or an azo dye can be used. The organic dye film 104 is formed by dissolving the above material in a solvent such as diacetone alcohol, ethanol or cellosolve acetate, and spin-coating the solution to 100 to 300 n.
The thickness is about m.

Organic dye film 10 made of the above organic dye material
No. 4, for example, has a property that when irradiated with light from an ultraviolet lamp or the like, the irradiated portion changes color. The mechanism of this discoloration is that the organic dye excited by light reacts with oxygen in the ground triplet state to generate active singlet oxygen, and the generated singlet oxygen decomposes and discolors the organic dye. It is considered.

Although not shown, a protective film such as a resin film or an inorganic dielectric film may be formed between the reflective film 103 and the organic dye film 104. Although not shown, a protective film made of a resin film or an inorganic dielectric film may be formed on the surface of the organic dye film 104.

FIG. 2 is a schematic diagram for explaining means for recording an image pattern on an optical information recording medium according to the first embodiment of the present invention. In the figure, the same parts as those in FIG. 201 is a mask, 202 is a light transmitting part, 203 is a light source, and 204 is light.

As shown in FIG. 2, the surface of the optical information recording medium of the present embodiment on the organic dye film 104 side is made of a material such as a character or a picture which is designed by the user himself, which does not transmit light or does not transmit light. Mask 20 made of a material that has been subjected to various processes and having an image pattern formed as a light transmitting portion 202.
1 is adhered. The mask 201 is preferably a thin one such as paper or a resin film. The light transmitting section 202 may be an opening, or may be a transparent or translucent film or the like. By changing the transmittance of the light transmitting portion 202, it is also possible to give light and shade to the image pattern formed on the organic dye film 104.

A light 204 from a light source 203 such as an ultraviolet lamp or an incandescent lamp is irradiated on the optical information recording medium with the mask 201 adhered thereto. The irradiated light 2 is applied only to the light transmitting portion 203 corresponding to the image pattern formed on the mask 201.
04 reaches the organic dye film 104. In this state, light 2
04 is continued for several hours, the light 2
The portion where the color reaches 01 is discolored, and an image pattern is formed based on the contrast of the colors of the discolored portion and the non-discolored portion.

Further, as described above, if the transmittance of the light transmitting portion 202 is changed, the color change of the organic dye film 104 corresponding to a portion having a high transmittance proceeds quickly, and the organic dye film 104 corresponding to a portion having a low transmittance is changed. Since the discoloration of the dye film 104 proceeds slowly,
The degree of discoloration of the organic dye film 104 can be changed, and the image pattern can be shaded.

FIG. 3 is a schematic diagram showing a state in which an image pattern is recorded on the organic dye film of the optical information recording medium according to the first embodiment of the present invention. In the figure, the same parts as those in FIG. Reference numeral 301 denotes an image pattern. FIG. 3 shows a state in which the optical information recording medium of the present embodiment is viewed from the organic dye film 104 side (upper side in FIG. 1). The color of the organic dye film 104 in the portion of the image pattern 301 corresponding to a character or a picture is discolored, and in the portion other than the image pattern 301, the color of the organic dye film 104 is not changed and the initial state is maintained. The color tone is visually different from the unexposed portion, and can be recognized as an image pattern.

FIG. 4 is a schematic diagram for explaining a sectional structure of a second embodiment of the optical information recording medium of the present invention. In the figure, the same parts as those in FIG. As shown in FIG. 4, the substrate 101 has an outer diameter of 120 m.
m, an inner diameter of 15 mm, a thickness of 1.2 mm, made of polycarbonate resin, acrylic resin, glass or the like, and the information area 102 is formed on one surface in a range of, for example, a diameter of 45 mm to 80 mm. The area outside the information area 102 on the substrate 101 is a smooth mirror surface.

In the case of a read-only optical disk, the information area 102 is composed of a spiral or concentric pit row. In the case of a write-once optical disk, a spiral or concentric guide groove is formed. The guide groove is formed of an organic dye film made of a cyanine dye, a phthalocyanine dye, an azo dye, or the like formed on the guide groove. Ge-Te-S formed on the guide groove
It is composed of a phase change recording film such as a b-based material, an In-Sb-Te-Se-based material, and an inorganic dielectric film.

An organic dye film 104 that changes color when exposed to light is formed on a mirror surface portion (a region having a diameter of 80 mm to 120 mm in this embodiment) outside the information region 102. As the organic dye film 104, a cyanine dye,
Organic dye materials such as phthalocyanine dyes and azo dyes can be used. The organic dye film 104 is formed by dissolving the above material in a solvent such as diacetone alcohol, ethanol, or cellosolve acetate, and spin-coating the solution.
It is formed to a thickness of about 300 nm.

Here, when the optical information recording medium of this embodiment is a write-once optical disc, the material used for the organic dye film 104 and the material of the recording film formed in the information area 102 may be the same. In this case, the recording film and the organic dye film 104 can be formed simultaneously. That is, the recording film and the organic dye film 104 can be formed at the same time by spreading the organic dye, which is a material, in the range of 45 mm to 120 mm in diameter by spin coating.

The mirror portion where the information region 102 and the organic dye film 104 are formed is made of aluminum (Al), gold (A
u) and the like. Reflective film 1
03 is formed in a thickness of 50 to 100 nm by a sputtering method, an evaporation method, or the like.

Although not shown, a protective film made of a resin film or an inorganic dielectric film may be formed on the surface of the reflective film 103.

FIG. 5 is a schematic diagram for explaining means for recording an image pattern on an optical information recording medium according to the second embodiment of the present invention. In the figure, the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 5, on the reproduction surface side of the substrate 101 of the optical information recording medium of this embodiment, a material made of characters, pictures, etc., which does not transmit light, or a material which does not transmit light, such as characters and pictures designed by the user himself. A mask 201 made of a processed material and having an image pattern formed as a light transmitting portion 202
To adhere. The light transmitting portion 202 is formed in a portion of the mask 201 facing the position where the organic dye film 104 is formed. The mask 201 is preferably a thin one such as paper or a resin film. The light transmitting section 202 may be an opening, or may be a transparent or translucent film or the like. By changing the transmittance of the light transmitting portion 202, it is also possible to give light and shade to the image pattern formed on the organic dye film 104.

The optical information recording medium having the mask 201 adhered thereto is irradiated with light 204 from a light source 203 such as an ultraviolet lamp or an incandescent lamp. The irradiated light 2 is applied only to the light transmitting portion 203 corresponding to the image pattern formed on the mask 201.
04 reaches the organic dye film 104. In this state, light 2
04 is continued for several hours, the light 2
The portion that has reached 04 undergoes discoloration, and an image pattern is formed by the discolored portion and the non-discolored portion. However, since the substrate 101 is located between the mask 201 and the organic dye film 104, it is preferable to irradiate parallel light in order to clearly record an image pattern on the organic dye film 104.

Further, as described above, if the transmittance of the light transmitting portion 202 is changed, the color change of the organic dye film 104 corresponding to the portion having a high transmittance proceeds rapidly, and the organic dye film 104 corresponding to the portion having a low transmittance is changed. Since the discoloration of the dye film 104 proceeds slowly,
The degree of discoloration of the organic dye film 104 can be changed, and the image pattern can be shaded.

FIG. 6 is a schematic diagram showing a state in which an image pattern is recorded on the organic dye film of the optical information recording medium according to the second embodiment of the present invention. In the figure, the same parts as those in FIGS. 1 and 3 are denoted by the same reference numerals, and description thereof will be omitted. In FIG. 6, the substrate 10
1 shows a state in which the optical information recording medium of the present embodiment is viewed from one side (the lower side in FIG. 4). The color of the organic dye film 104 in the portion of the image pattern 301 corresponding to a character or a picture is discolored, and in the portion other than the image pattern 301, the color of the organic dye film 104 is not changed and the initial state is maintained. The color tone is visually different from the unexposed portion, and can be recognized as an image pattern.

In the optical information recording medium of this embodiment, an image pattern can be recognized from the side where the reproduction light for reproducing the information area 104 is incident, that is, through the substrate 101.

FIG. 7 is a schematic diagram for explaining the sectional structure of the third embodiment of the optical information recording medium of the present invention. In the figure, the same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted. 701 is a first substrate, 702 is a second substrate, 703
Denotes an adhesive layer, 704 denotes a first reflection film, and 705 denotes a second reflection film. The first substrate 701 is made of polycarbonate resin, acrylic resin, glass, or the like having an outer diameter of 120 mm, an inner diameter of 15 mm, and a thickness of 0.6 mm.
Is formed, for example, in the range of 45 mm to 116 mm in diameter.

In the case of a read-only optical disk, the information area 102 is composed of a spiral or concentric pit row. In the case of a write-once optical disk, a spiral or concentric guide groove and a guide groove are formed. The guide groove is formed of an organic dye film made of a cyanine dye, a phthalocyanine dye, an azo dye, or the like formed on the guide groove. Ge-Te-S formed on the guide groove
It is composed of a phase change recording film such as a b-based material, an In-Sb-Te-Se-based material, and an inorganic dielectric film.

The information area 102 is made of aluminum (A
1), a first reflective film 704 made of gold (Au) or the like. The first reflective film 704 is formed with a thickness of 50 to 100 nm by a sputtering method, an evaporation method, or the like.

The second substrate 702 has an outer diameter of 120 m.
This is a dummy substrate made of polycarbonate resin, acrylic resin, glass, or the like having a diameter of 15 mm, an inner diameter of 15 mm, and a thickness of 0.6 mm. On one surface of the second substrate 702, an organic dye film 104 that changes color when irradiated with light is formed. As the organic dye film 104, an organic dye material such as a cyanine dye, a phthalocyanine dye, or an azo dye can be used. The organic dye film 104 is formed by dissolving the above material in a solvent such as diacetone alcohol, ethanol, or cellosolve acetate, and is formed to a thickness of about 100 to 300 nm by a spin coating method.

On the second substrate 702, the organic dye film 1
The second reflection film 705 is formed so as to cover the second reflection film 04. The second reflective film 705 is made of aluminum (Al), gold (Au), or the like, and is formed in a thickness of 50 to 100 nm by a sputtering method, an evaporation method, or the like.

The first substrate 701 and the second substrate 702 are
The first reflection film 704 and the second reflection film 705 are attached to each other by an adhesive layer 703 such as an ultraviolet curable resin so as to face each other. In the optical information recording medium of this embodiment, recording or reproduction of information is performed from the first substrate 701 side.

FIG. 8 is a schematic diagram for explaining means for recording an image pattern on an optical information recording medium according to the third embodiment of the present invention. In the figure, the same parts as those in FIGS. 1, 2 and 7 are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 8, the second substrate 702 on which the organic dye film 104 of the optical information recording medium of this embodiment is formed.
Is made of a material that does not transmit light such as characters and pictures designed by the user himself or a material that has been processed so as not to transmit light.
The mask 201 formed as 2 is brought into close contact. It is preferable that the mask 201 has a small thickness, such as paper or a resin film. The light transmitting section 202 may be an opening, or may be a transparent or translucent film or the like. By changing the transmittance of the light transmitting portion 202, it is also possible to give light and shade to the image pattern formed on the organic dye film 104.

Light 204 from a light source 203 such as an ultraviolet lamp or an incandescent lamp is irradiated to the optical information recording medium with the mask 201 adhered thereto. The irradiated light 2 is applied only to the light transmitting portion 203 corresponding to the image pattern formed on the mask 201.
04 reaches the organic dye film 104. In this state, light 2
04 is continued for several hours, the light 2
The portion where the color reaches 01 is discolored, and an image pattern is formed by the discolored portion and the non-discolored portion. However, the second substrate 702 is provided between the mask 201 and the organic dye film 104.
Therefore, in order to clearly record an image pattern on the organic dye film 104, it is preferable to irradiate parallel light.

Further, as described above, if the transmittance of the light transmitting portion 202 is changed, the color change of the organic dye film 104 corresponding to the portion having a high transmittance proceeds rapidly, and the organic dye film 104 corresponding to the portion having a low transmittance is changed. Since the discoloration of the dye film 104 proceeds slowly,
The degree of discoloration of the organic dye film 104 can be changed, and the image pattern can be shaded.

FIG. 9 is a schematic diagram showing a state in which an image pattern is recorded on the organic dye film of the optical information recording medium according to the third embodiment of the present invention. In the figure, the same parts as those in FIGS. 1 and 7 are denoted by the same reference numerals, and description thereof will be omitted. FIG. 9 shows a state in which the optical information recording medium of this embodiment is viewed from the second substrate 702 side (upper side in FIG. 7). The color of the organic dye film 104 in the portion of the image pattern 301 corresponding to a character or a picture is discolored, and in the portion other than the image pattern 301, the color of the organic dye film 104 is not changed and the initial state is maintained. The color tone is visually different from the unexposed portion, and can be recognized as an image pattern.

[0048]

According to the present invention, it is possible to provide an optical information recording medium capable of displaying a label created by a user himself with simple equipment.

[Brief description of the drawings]

FIG. 1 is a schematic diagram for explaining a cross-sectional structure of an optical information recording medium according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram for explaining means for recording an image pattern on the optical information recording medium according to the first embodiment of the present invention.

FIG. 3 is a schematic diagram showing a state in which an image pattern is recorded on an organic dye film of the optical information recording medium according to the first embodiment of the present invention.

FIG. 4 is a schematic diagram illustrating a cross-sectional structure of an optical information recording medium according to a second embodiment of the present invention.

FIG. 5 is a schematic diagram for explaining means for recording an image pattern on an optical information recording medium according to a second embodiment of the present invention.

FIG. 6 is a schematic diagram showing a state in which an image pattern is recorded on an organic dye film of an optical information recording medium according to a second embodiment of the present invention.

FIG. 7 is a schematic diagram for explaining a cross-sectional structure of an optical information recording medium according to a third embodiment of the present invention.

FIG. 8 is a schematic diagram for explaining means for recording an image pattern on an optical information recording medium according to a third embodiment of the present invention.

FIG. 9 is a schematic diagram showing a state in which an image pattern is recorded on an organic dye film of an optical information recording medium according to a third embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 101 substrate 102 information region 103 reflective film 104 organic dye film 201 mask 202 light transmitting portion 203 light source 204 light 301 image pattern 701 first substrate 702 second substrate 703 adhesive layer 704 first reflective film 705 second reflective film

Claims (3)

[Claims] 1. A substrate having information recorded on one side or having an information area capable of recording information, a reflective film formed on the information area, and formed on the reflective film and exposed. An optical information recording medium, comprising: an organic dye film that changes its color by using the organic dye film, wherein the organic dye film displays an image pattern based on the contrast of the hue of the photosensitive portion and the unexposed portion. 2. A first substrate having an information area on which information is recorded or capable of recording information on one side, a first reflective film formed on the information area, and a second substrate. An organic dye film formed on one surface of the second substrate and discolored by being exposed to light, a second reflective film formed on the organic dye film, the first substrate and the second An adhesive layer for bonding the substrate with the first reflection film and the second reflection film facing each other, wherein the organic dye film displays an image pattern based on a contrast in color tone between a photosensitive portion and an unexposed portion. An optical information recording medium characterized in that: 3. A substrate having an information area in which information is recorded or information can be recorded on one side and a non-information area formed outside the information area, and a substrate formed on the non-information area and exposed to light. An organic dye film that changes color by being provided, and a reflective film formed so as to cover the information region and the non-information region where the organic dye film is formed, wherein the organic dye film is a photosensitive portion and a non-photosensitive portion. An optical information recording medium, wherein an image pattern is displayed by the contrast of the color.