JPH10134422A - Information recording medium and information recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magneto-optical recording medium having excellent convenience. SOLUTION: The information recording medium 501 recorded with information is so formed that the medium is stickable to a member to be stuck, by which the easy mounting of effective information on the member to be stuck is possible. For example, the individual information, such as the date of one's birth, profile, selling points, etc., is previously recorded on the member, by which the member to be stuck is easily embodied as the goods for appealing individual persons. The image information of the individual persons is previously recorded on the member, by which the degree of appealing is further increased. More particularly the optimum means for appealing is obtd. by sticking the member to a name card 503.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording medium such as a magneto-optical recording medium and an apparatus for inputting information to the information recording medium.

[0002]

2. Description of the Related Art In recent years, with the rapid increase in the amount of information, various recording techniques such as an optical recording medium and a magnetic recording medium have been proposed in order to establish a preservation technique. Attention has been paid to a magneto-optical recording technology that is easy to handle and capable of recording information at a high density, and is currently being actively developed with the aim of further increasing the density.

For example, in Japanese Patent Application Laid-Open No. Hei 8-7350,
By proposing a structure of a medium that is not limited by the spot diameter of a laser beam during recording and reproduction, high-density recording is enabled.

[0004]

In the prior art, various types of recording media, including magneto-optical recording media, have been realized with high densities.
The reality is that they have not been satisfactorily advanced. The present invention has been made in view of such circumstances, and an object of the present invention is to provide an information recording medium that is excellent in convenience.

[0005]

The invention according to claim 1 is an information recording medium having an area in which information such as images, sounds, and characters are recorded, and an adhesive portion that can be attached to a member to be attached. According to a second aspect of the present invention, personal information is recorded as the information. The invention of claim 3 is:
At least personal image information is recorded as the information.

According to a fourth aspect of the present invention, the information recording medium is attached to a business card. Further, the invention according to claim 5 is characterized in that the member to be pasted is an article such as an optical disk or a book or a main medium such as an electric product on which main information such as images, sounds and characters are recorded, and the information is the main medium or the main medium. It is configured to relate to the item itself or the main information recorded on the main medium.

Further, the invention according to claim 6 is an information recording medium having at least an area in which image information for personal verification is recorded.

According to a seventh aspect of the present invention, an information recording member having at least an area for recording personal verification image information is provided on a hard card. Claim 8
According to the invention, the hard card has an IC chip. According to a ninth aspect of the present invention, the area for recording the information includes a high-capacity recording unit.

[0009] In a tenth aspect of the present invention, the area for recording the information comprises a magneto-optical recording section. Also,
An eleventh aspect of the present invention has a high-capacity recording unit that records information such as images, sounds, and characters. A twelfth aspect of the present invention has a magneto-optical recording unit that records information such as images, sounds, and characters.

[0010] In the invention of claim 13, personal information is recorded as the information. Claim 15
According to the invention, the image information is composed of stereoscopic image data. The invention of claim 16 uses polygon data as stereoscopic image data.

The invention according to claim 17 is that the magneto-optical recording section has a structure in which at least one reproducing layer and at least one information recording layer are laminated on a substrate, and irradiates an energy beam. Thereby, the information recorded on the information recording layer is transferred to the reproducing layer. The information recording apparatus according to claim 18 is an information recording medium having an adhesive portion that can be attached to a member to be attached, an input unit for inputting necessary information, and data corresponding to the input from the input unit. Recording means for recording on an information recording medium.

Further, in the information recording apparatus according to a nineteenth aspect, the input means includes means for inputting at least three-dimensional image data. That is, by enabling an information recording medium on which information such as images, sounds, and characters are recorded to be attached to a member to be pasted, effective information can be easily mounted on the member to be pasted.

For example, by recording personal information such as date of birth, profile, and sales points,
The attached member can be easily realized as personal appeal goods, and by recording personal image information,
The appeal level is further improved. In particular, by sticking it to a business card, it becomes the most suitable means of appeal.

[0014] Further, for example, campaign information of the product or image information (for example, a promotion video of an artist) suitable for the music of the optical disk can be easily attached to the optical disk on which the music is recorded. A book can be easily attached with profile information of the author of the book, image information for facilitating understanding of the contents of the book, and the like.

Further, by recording a face image of an individual as image information for individual verification, identification can be performed more reliably than identification by an ID number or the like. , ID the card
Available as a card. In addition, by applying to existing IC cards equipped with IC chips, addresses, names,
Data with a small amount of information, such as date of birth, phone number, work place, department, ID number, etc., is stored on a small-capacity IC chip.
Data with a large amount of information, such as image information, can be recorded in the information recording section, and the data can be differentiated.
The function as a C card is improved.

In addition, without using an IC chip, an IC
A card that can record more information than a card can be provided at low cost. In addition, by using stereoscopic image data such as polygon data as image information, it is possible to provide an image with a sense of realism, and it is possible to more reliably perform visual recognition.

In particular, by recording information in a high-capacity recording unit or a magneto-optical recording unit, it is possible to record a large amount of information in a small area. In addition, it is possible to easily obtain an attachable information recording medium on which necessary information is recorded.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A magneto-optical recording medium to which the present invention is directed is a magneto-optical recording medium relating to magnetic domain amplification for reproducing a signal by transferring a signal recorded on a recording layer to a reproducing layer to enlarge a magnetic domain. is there. In a magneto-optical recording medium capable of reproducing a signal by magnetic domain amplification, the domain of the recorded signal may be small,
Practical use of a magneto-optical recording medium with higher density recording becomes possible. The realization of a magneto-optical recording medium by this magnetic domain amplification has resulted in 1
4 GB recording capacity, ie compact disc (CD)
20 times that of digital video discs (DVD)
Twice as large as that of a DVD-ROM. As a result, a 12 cm disc can be recorded for 5 hours with the image quality comparable to that of a DVD, and two MDs can be recorded on a 1-yen disc, and one CD can be recorded on a 30-40 mmφ disc. It is also possible to realize the miniaturization of the disk, for example. Therefore, the present invention relates to the application of a new magneto-optical recording medium accompanying the increase in recording capacity and a system such as a recording / reproducing apparatus. (First Embodiment) A first embodiment of the present invention will be described with reference to the drawings.

An example in which a magneto-optical recording medium is applied to a card will be described with reference to FIG. A recording area 2 in which a signal can be recorded and / or reproduced is provided in a partial area of the card 1. The size of the area where the recording area 2 is provided is 10
mm × 10 mm, and may be affixed to the main body of the card 1 or may be integrated. 100 MB of information can be recorded in this 10 mm square area. The recording area 2 is a small block 2a, 2b of 600 μm square,
2c... Each block 2a, 2b,
Tracks composed of lands / grooves are formed in 2c..., And signals are recorded on the lands and grooves. The size of the recording area 2 is not limited to 600 μm square,
What is necessary is just to be less than m angle. The shape of the recording area 2 is not limited to a quadrangle, but may be a polygon such as a triangle, a pentagon, a hexagon, an octagon, or a circle.

Referring to FIG. 2, a mechanism for recording or reproducing data on or from the recording area 2 provided on the card 1 will be described. The card 1 is moved on the rail 4a in the direction of arrow 5 by the card feeding stepping motor 3a, and the recording area 2 reaches an area where the optical head 6 and the magnetic head 7 are provided to face each other. After the recording area 2 reaches an area where the optical head 6 and the magnetic head 7 are provided to face each other, of the blocks 2a, 2b, 2c,. The optical head 6 and the magnetic head 7 are moved on the rail 4b by the track-direction feed stepping motor 3b so that the laser beam from the optical head 6 is irradiated on the rail 4b. The reproduction of the block 2a is performed by a laser beam traveling on lands and grooves by the movement of an actuator (not shown) in the optical head 6. The size of each block is 0.6 to 1.0 on one side.
mm, so that the actuator can move. The scanning direction of the laser beam may be a reciprocating motion in the direction of arrow 5 or a zigzag motion. Figures 3 and 4
The scanning method of the laser beam will be described with reference to FIG.
The scanning of the laser beam in the direction of the arrow 5 is performed by the objective lens 3.
1 is performed by a galvanometer mirror 32 and a polygon mirror 41 provided on the front side of the first mirror. The galvanomirror 32 scans the laser beam by rotating in a predetermined range around a support shaft (not shown). The polygon mirror 41 is provided with an octagonal reflecting mirror, and reflects a laser beam in different directions on different reflecting surfaces by rotating about a support axis. As a result, laser beam scanning can be performed.

When the reproduction of the block 2a is completed, the optical head 6 and the magnetic head 7 are moved by the track direction feed stepping motor 3b so that the next block 2b can be irradiated with a laser beam. This movement is performed in a direction perpendicular to the arrow 5, and the movement distance is about the size of a block. After moving to the next block 2b,
Reproduction is performed in the same manner as described in the block 2a. After the block in the first column is reproduced by this repetition, the block is moved to the block in the next column. This movement is performed by moving the card 1 by one block in the direction of the arrow 5 by the card feeding stepping motor 3a. . Thus, the reproduction of the recording area 2 is performed.

The means for reproducing the recording area provided on the card is not limited to the above means, but may be the means shown in FIG. A fixed optical block 171 and a three-dimensional actuator 17 are included in an apparatus 170 for reproducing a pen-shaped signal.
2. The objective lens 173 is arranged. The laser beam emitted from the fixed optical block 171 at a predetermined position of each of the blocks 2a, 2b, 2c... Is fixed to the three-dimensional actuator 172.
Irradiated through 73. Irradiated laser beam 17
Reference numeral 4 indicates that a signal in one block is reproduced by the movement of the three-dimensional actuator 172. Thereafter, when the next block is reproduced, the device 170 is moved to a desired block position, and the signal in the desired block is reproduced.

The reproduction of each block does not need to be performed in order from the first row, but may be performed in a spiral form from the outer periphery to the inner periphery or from the inner periphery to the outer periphery. Also,
Further, the shape of the block provided in the recording area 2 is not limited to a square, but may be a circle or a polygon. The configuration of the optical system used for reproducing the card 1 is as shown in FIG.

Referring to FIG. 6, the recording area formed on the card may be a recording area 6a provided on the card 6 and having an entire area in one direction of the card. Recording and reproduction are performed on the card 6 in the same manner as described above. Reproduction when the recording area provided on the card is circular will be described with reference to FIGS. Turntable 111
The recessed portion 118 allows the card 114 to be mounted.
Are provided, and the turntable 111 is configured to be rotated by the rotary motor 110. A magnet 117 is disposed in the recess 118 so as to face a recording area 115 provided on the card 114, and is used for recording or reproducing a signal. When a card 114 is mounted on the turntable 111 in the direction of arrow 113, the motor
, And the turntable 111 rotates. The card 114 is rotated by the rotation of the turntable 111, and reproduction is performed by the magnet 118 and the optical pickup 116 facing both surfaces of the recording area 115.

Referring to FIG. 13, a method of reproducing a signal by inserting a circular disk into a card and rotating the disk will be described. The disk 131 is inserted into the card 130, and when the card 130 is inserted into an area where the optical head 6 and the magnetic head 7 face each other, a shaft 134 fixed to the disk spindle motor 133 and rotatable by the disk spindle motor 133.
Is a hole 135 provided at the center of the disk 131.
Insert The rotation of the disk spindle motor 133 causes the disk 131 to rotate, and the optical head 6 and the magnetic head 7 reproduce signals. The radial movement of the disk 131 between the optical head 6 and the magnetic head 7 is performed by moving on rails 132 and 132.

Although the reproduction has been described above, the recording can be similarly performed. (Second Embodiment) A second embodiment of the present invention will be described with reference to the drawings. With reference to FIG. 7, recording / reproducing of a tape-shaped magneto-optical recording medium will be described. The tape 74 is moved by an arrow 7 by the tape feed motor 73.
Then, the optical head 6 and the magnetic head 7 are moved on the rail 71 by the stepping motor 70 for track direction feed, thereby being moved in a direction substantially perpendicular to the arrow 72. As a result, the laser beam reproduces a signal recorded in each area of the tape 74.

The optical head 6 for reproducing the tape 74
Is not limited to the one shown in FIG. 7, but may be one shown in FIG. The tape 74 is moved in the direction of the arrow 82, and the optical heads 81a, 8 radially arranged on the support 80.
1b, 81c,... Successively reproduce the recording area 74a formed in the tape 74 by rotating the rotary motor. One recording area 74a with one optical head 81a
When the reproduction of the optical heads 81a and 81b is completed, the next optical head 81b can reproduce the next recording area.
are arranged.

The recording area 74a may be composed of the above-described blocks. Further, it goes without saying that recording can also be performed by the above method. (Third Embodiment) A third embodiment of the present invention will be described with reference to the drawings. With reference to FIG. 9, a description will be given of a method of recording or reproducing by rotating a disk by mounting a circular disk on a carrier and rotating the carrier. A disc 92 is mounted on the carrier 93 so as to fit into a hole provided in the carrier 93. The magnet 91 is provided on the opposite surface of the carrier 93 on which the disk is mounted as shown in FIG.
Are arranged so that the N pole and the S pole alternate. The coil 9 is located at a position facing the magnet 91.
0 are arranged as shown in FIG. Coil 9
When a current is applied to 0, the carrier 93 rotates in a predetermined direction due to the repulsion between the magnetic field generated by the coil and the magnet 91 provided on the carrier 93, whereby the disk 92 rotates. Except for this, the operation is the same as that of a normal disc reproducing operation.

Referring to FIG. 10, a method of recording or reproducing a disk by rotating the disk by rotating the outer periphery of the disk with rollers will be described. The disk 105 has two supports 102, 102 and the roller 10
It is supported at three points by 0. Supports 102, 10
2. The roller 100 is pressed against the disk 105 by a spring. Further, the roller 100 is connected to the rotating body 104 and the belt 103, and rotates as the rotating body 104 rotates. The roller 100 is the disk 1
Since the roller 105 is in contact with the outer peripheral portion of the disk 105, the disk 105 is rotated by the rotation of the roller 100. By the rotation of the disk 105, signals can be recorded / reproduced by the optical head 6 and the magnetic head 7 disposed on both sides of the disk. The attachment and detachment of the disk 105 is performed by the arm 10
This is performed by pushing the disk 105 in the direction of the arrow 106 according to 1, 101.

Unlike the conventional disk, the disk recorded or reproduced by the method described with reference to FIGS. 9 and 10 does not require a hole at the center of the disk, and records or reproduces signals in the entire area of the disk. You can also. (Fourth Embodiment) A fourth embodiment of the present invention will be described with reference to the drawings.

With reference to FIGS. 14, 15 and 16, a method of recording or reproducing a signal by sandwiching a card provided with a recording area will be described. FIG. 14 shows the appearance of an apparatus for recording or reproducing a signal by inserting a card. When the card 143 is inserted into the space 142, the movable part 141 provided at a predetermined angle with the fixed part 140 moves in the direction of the arrow 145, and the card 143 is sandwiched. Details of the device are shown in FIGS. The movable unit 140 includes an optical unit 146, a magnet 147,
47 are provided. In addition, the movable part 141 includes:
A magnetic head 148 is provided.
Is inserted into the space 142, the recording area 144 in the card 143 becomes the magnetic head 148 and the optical unit 146.
Will be confronted with. In a configuration including the optical unit 146, a member for driving the optical unit 146, and a magnetic head 148 for generating a magnetic field, the movable unit 141 having the magnetic head 148 moves in the direction of the arrow 145 to pinch the recording medium and generate a signal. Recording or reproduction.

The optical unit 146 includes the objective lens 14
9, an objective lens driving (focusing direction and tracking direction) member, a laser light source, a signal detection sensor, and optical components, which are not shown, are arranged. The optical unit 146 is held by leaf springs 147 and 147.
The leaf springs 150 and 151 are magnets 147 and 147.
The optical unit 146 is moved in the first direction by a force generated by a coil (not shown). Further, the leaf springs 150 and 151 are held by leaf springs 152 and 153. The leaf springs 152 and 153 are
As in the case of the plate spring 151, the force generated by the magnets 154 and 154 and a coil not shown
2,153 are moved in a second direction perpendicular to the first direction. As a result, the optical unit 146 moves in the first direction and the second direction. Card 143
At the stage where the optical unit 146 is
Starts focusing and tracking, and starts recording or reproducing data. When moving to the next recording area, the leaf springs 150, 151, 152, and 153 move respectively, and move the optical unit 146 to a target area.

The recording area described in the first, second, third, and fourth embodiments has a recording density of 1 bit / μm ² to 50.
0 bit / μm ² , preferably 100 bit / μm ²
It is recorded in the range of μm ^{2 to} 300 bits / μm ² .
Various recording media can be used for the recording area. For example, the magneto-optical recording medium may be inserted into a card or the like, or may be formed into a sheet and affixed to the card or the like. For a circular medium, the diameter is in the range of 5 to 310 mm,
Preferably, it is in the range of 10 to 70 mm.

Next, a reproducing mechanism, a reproducing apparatus, and recording on a magneto-optical recording medium by expanding a magnetic domain in a magneto-optical recording medium used in the recording areas described in the first to fourth embodiments will be described in detail. (Fifth Embodiment) A fifth embodiment of the present invention will be described with reference to the drawings.

Referring to FIG. 22, a magneto-optical recording medium to which the present invention is applied includes a dielectric layer 225 made of SiN and a Gd on a light-transmitting substrate 226 made of glass, polycarbonate or the like.
Reproducing layer 224 made of FeCo, nonmagnetic layer 223 made of SiN / AlTi, recording layer 22 made of TbFeCo
2. A structure in which a protective layer 1 made of SiN is sequentially deposited. The thickness of the dielectric layer 225 is 600 to 800 °, the thickness of the reproducing layer 224 is 50 to 1000 °, the thickness of the nonmagnetic layer 223 is 50 to 300 °, the thickness of the recording layer 222 is 500 to 3000 °, The thickness of the protective layer 221 is 500 to 1000 °. Each of the layers is formed by a magnetron sputtering method using Ar gas.

In the present invention, the reproducing layer 22
5 is not limited to GdFeCo, but GdFe or GdCo
Alternatively, the magnetic film may be made of TbCo or one element selected from Ho, Gd, Tb, and Dy and one element selected from Fe, Co, and Ni. Also,
Further, the nonmagnetic layer 223 is made of AlN, TiN, SiO ₂ or Al ₂ O _3, SiC, TiC, ZnO or SiAl instead of SiN.
It may be ON, ITO or SnO ₂ .
Further, the recording layer 222 is not limited to TbFeCo, but may include elements selected from Tb, Dy, and Nd and Fe, C
It may be a single-layer magnetic film or a multilayer magnetic film composed of an element selected from o and Ni. In addition, P
It may be a single-layer magnetic film or a multi-layer magnetic film composed of one element of t and Pd and an element selected from Fe, Co, and Ni.

When a laser beam is applied to a magneto-optical recording medium, a temperature distribution having a Gaussian distribution usually occurs on the medium as shown in FIG. A super-resolution magneto-optical recording medium capable of reproducing a magnetic domain smaller than a spot diameter of a laser beam by transferring a magnetization from a recording layer to a reproducing layer by providing a reproducing layer with a mask function by using this temperature distribution and applying the present invention to the present invention. I have. Therefore, the point different from the reproduction of the conventional super-resolution magneto-optical recording medium is that the reproduction is performed after the magnetization is transferred to the reproduction layer and the magnetic domain is enlarged. The wavelength of the laser beam used for reproduction is 680 to 830 nm, the numerical aperture of the objective lens for focusing the laser beam is 0.55 (allowable error ± 0.05), and the spot diameter of the laser beam is 1.0. (Tolerance ±
0.1) μm.

Referring to FIG. 19, a CAD (Center) in which a window for reading information is formed at the center of the laser beam.
The present invention using a super-resolution magneto-optical recording medium based on the “Aperture Detection” method will be described. In a super-resolution magneto-optical recording medium based on the CAD method, a magnetic layer that is an in-plane magnetic film at room temperature and a perpendicular magnetic film at a predetermined temperature or higher is used as a reproducing layer. The predetermined temperature is usually in the range of 100 to 170 ° C., and when the predetermined temperature is reached, a magnetic film is used which rapidly changes from an in-plane magnetization film to a perpendicular magnetization film. One index indicating how steeply the film changes from the in-plane magnetization film to the perpendicular magnetization film is a temperature coefficient C of the Kerr rotation angle. In the present invention, a magnetic film having a temperature coefficient C of 8.0 or more is used. I have. For details of the method of calculating the temperature coefficient C, see “Sumi et al.
Proceedings of the 3rd Joint Lecture on Applied Physics 27p-
PD-26 (1996) ". Referring to FIG. 19, as the magnetic film used for the reproducing layer 4a of the super-resolution magneto-optical recording medium 1910 by the CAD method, GdFeCo, G
dFe and GdCo are suitable. In addition, the nonmagnetic layer 223
As SiN, AlN, TiN, SiO ₂ , Al
₂ O ₃ , SiC, TiC, ZnO, SiAlON, IT
O and SnO ₂ are suitable. Further, the recording layer 222 may be a single-layer magnetic film or a multilayer magnetic film composed of an element selected from TbFeCo, Tb, Dy, and Nd and an element selected from Fe, Co, and Ni. . Further, one element of Pt and Pd and Fe, Co, Ni
And a single-layer magnetic film or a multilayer magnetic film composed of an element selected from the above. When the laser beam is applied to the super-resolution magneto-optical recording medium 1910 by the CAD method, the magnetic domains 227 in the region where the temperature has reached the predetermined temperature or higher are transferred to the reproducing layer 224 via the non-magnetic layer 223, and are transferred to the reproducing layer 224. A magnetic domain 228 having the same magnetization as the magnetic domain 227 in the recording layer 222 appears. In this case, since the transfer from the recording layer 222 to the reproduction layer 224 is performed via the non-magnetic layer 223, the transfer is performed not by the exchange coupling force but by the magnetostatic coupling (FIG. 19A). Next, an external magnetic field Hep is applied to enlarge the magnetic domain transferred to the reproducing layer 224. The applied external magnetic field Hep is an alternating magnetic field, and when it is in the same direction as the magnetization of the transferred magnetic domain 8, the magnetic domains 8 a, 8 in the both sides of the magnetic domain 228 are also in the same direction as the magnetization of the magnetic domain 228.
b occurs, and the transferred magnetic domain 228 is enlarged (FIG. 19B). At this moment, it is detected as a reproduced signal by a reproducing device described later.

The magnitude of the applied external magnetic field Hep is determined as follows. Referring to FIG. 20, a curve 209 indicates a hysteresis curve of the magnetic film, Hc indicates a magnitude of a magnetic field necessary to make all magnetic domains of the magnetic film have the same direction,
Hn indicates the magnitude of the magnetic field necessary for enlarging the reversal magnetic domain when a magnetic domain exists in a part of the magnetic film. Therefore,
If the magnetic film does not have a reversal magnetic domain, it is magnetized along the curve 209 as the magnetic field applied from the outside increases. However, when the reversal magnetic domain exists first, it is magnetized along the curve 2013, and the magnetic domain expands when a magnetic field of Hn or more is applied from the outside. Therefore, in the present invention, the external magnetic field Hep required to enlarge the magnetic domains 228 transferred to the reproducing layer 4 may be Hn ≦ Hep ≦ Hc. FIG. 21 shows the read power dependence of Hn and Hc measured using the magneto-optical recording medium shown in FIG. The wavelength of the laser beam is 830 nm. When the reproducing power is in the range of 1.0 to 2.2 mW, there is a clear difference between Hn and Hc, so that H is determined according to each reproducing power.
The external magnetic field Hep may be determined between n and Hc. For example, when the reproducing power is 1.4 mW, 200 to 25
The external magnetic field Hep may be set during 0 Oe. Also,
According to FIG. 21, the external magnetic field Hep can be reduced as the reproducing power increases. The frequency of the alternating magnetic field is 0.5 to 2 MH
z.

After the magnetic domains are transferred to the reproducing layer 224 and the magnetic domains are expanded and reproduced by an external magnetic field, it is necessary to temporarily erase the expanded magnetic domains in order to transfer and expand and reproduce the next recording magnetic domain. is there. There are two erasing methods. One is a method using a minimum stable magnetic domain diameter determined according to the type of the magnetic film. Referring to FIG. 23, the minimum stable magnetic domain diameter rmin decreases as the temperature of the magnetic film increases,
In the case of GdFeCo used for the reproducing layer 224, the rmin at room temperature is 0.5 to 0.6 μm and the rmin at 120 ° C.
Is 0.1 μm. That is, a magnetic domain of 0.1 μm or more can be stably present at 120 ° C., but 0.1 μm at room temperature.
μm-sized magnetic domains can no longer exist stably,
Will disappear.

Referring to FIG. 24, another method for erasing the magnetic domain transferred / expanded on the reproducing layer 224 is an external magnetic field Hep applied when expanding the magnetic domain, that is, the magnetization direction of the transferred / expanded magnetic domain. And applying a magnetic field Hsr in the opposite direction. In the above, the example using the super-resolution magneto-optical recording medium by the CAD method has been described. However, the present invention is not limited to this, and the RAD (Rear Aperture D)
super resolution magneto-optical recording medium or FAD (Front Aperture Det)
(Election) method may be used. In a super-resolution magneto-optical recording medium based on the RAD method, a window for reading a signal is formed behind a laser beam. Referring to FIG. 25, in a super-resolution magneto-optical recording medium 2511 based on the RAD method, a perpendicular magnetization film is used for the reproducing layer 4b, and the reproducing layer 4b is irradiated before the beam irradiation.
An initialization magnetic field, not shown, is applied to make the magnetization method b uniform. When the medium is irradiated with the laser beam, the magnetization of the magnetic domain 7a that has risen to a predetermined temperature or higher is magnetostatically coupled from the recording layer 222 through the nonmagnetic layer 223 to the magnetic domain 8a of the reproducing layer 4b.
transferred to c. The subsequent magnetic domain enlarging / erasing operation is shown in FIG.
The description is omitted because it is the same as that described above. As the reproducing layer 4b of the super-resolution magneto-optical recording medium 1911 by the RAD method, a magnetic film made of TbCo, Dy and one element selected from Fe, Co, and Ni is suitable. Further, as the nonmagnetic layer 223, SiN, AlN, TiN, SiO ₂ ,
Al ₂ O ₃ , SiC, TiC, ZnO, SiAlON, I
TO and SnO ₂ are suitable. Further, the recording layer 222 may be a single-layer magnetic film or a multilayer magnetic film composed of an element selected from TbFeCo, Tb, Dy, and Nd and an element selected from Fe, Co, and Ni. .
Further, one element of Pt and Pd and Fe, Co, N
It may be a single-layer magnetic film or a multi-layer magnetic film composed of an element selected from i.

Referring to FIG. 26, also in super-resolution magneto-optical recording medium 2612 by the FAD method, a perpendicular magnetization film is used for reproducing layer 4c, and the perpendicular magnetization film is irradiated with a laser beam at a predetermined temperature (Curie temperature). If the temperature rises above the above, the magnetization is erased. In this medium, when a signal is recorded, the directions of magnetization of the recording layer 222 and the reproduction layer 4c match. When the laser beam is irradiated and the temperature of the reproducing layer 4c rises above a predetermined temperature, the magnetization of the region 8b is erased. Therefore, the signal is reproduced in front of the laser beam having a low temperature region by using the region 8d having the predetermined temperature or higher as a mask. The subsequent magnetic domain enlarging / erasing operation is the same as that described with reference to FIG. Super resolution magneto-optical recording medium 2 by FAD method
As the reproducing layer 4c of 612, TbCo, Dy and Fe, C
A magnetic film composed of one element selected from o and Ni is suitable. Further, as the nonmagnetic layer 223, SiN, A
1N, TiN, SiO ₂ , Al ₂ O ₃ , SiC, TiC,
ZnO, SiAlON, ITO, SnO ₂ are suitable. Further, as the recording layer 222, TbFeCo, Tb,
It may be a single-layer magnetic film or a multilayer magnetic film composed of an element selected from Dy and Nd and an element selected from Fe, Co and Ni. Further, a single-layer magnetic film or a multi-layer magnetic film composed of one element of Pt and Pd and an element selected from Fe, Co, and Ni may be used.

Referring to FIG. 37, the magneto-optical recording medium according to the present invention may be a super-resolution magneto-optical recording medium 3718 obtained by combining the RAD method and the FAD method. As the reproducing layer 4d of the super-resolution magneto-optical recording medium 3718, TbC
A magnetic film made of o, Dy and one element selected from Fe, Co, and Ni is suitable. The nonmagnetic layer 223 is made of Si
N, AlN, TiN, SiO2, Al 2 O 3, SiC, Ti
C, ZnO, SiAlON, ITO, SnO ₂ are suitable. Further, as the recording layer 222, TbFeCo, Tb
b, Dy, Nd and an element selected from Fe, Co, N
It may be a single-layer magnetic film or a multi-layer magnetic film composed of an element selected from i. Further, Pt, P
It may be a single-layer magnetic film or a multilayer magnetic film composed of one element of d and an element selected from Fe, Co, and Ni. Before the super-resolution magneto-optical recording medium 3718 is reproduced, the reproducing layer 4d is magnetized in a fixed direction by an initialization magnetic field (not shown). Thereafter, when the super-resolution magneto-optical recording medium 3718 is irradiated with a laser beam, the reproducing layer 4
In the high temperature section 3719 of d, the magnetization is erased, and
The magnetic domain 3720 on the front side is the magnetic domain 37 of the recording layer 222.
Since it is magnetized in the same direction as 21, it can be reproduced by enlarging the magnetic domain 3720. The characteristics of the magnetic film used for the reproducing layer 4d include the recording layer 222
There is a temperature at which the magnetization is transferred from the substrate and a temperature at which the magnetization is erased at a temperature higher than the temperature.
To 120 ° C., and the temperature at which the magnetization is erased is 130 to 170 ° C. The magnitude of the initialization magnetic field before the start of the reproducing operation is 1 kOe or less.

Next, a reproducing apparatus for a magneto-optical recording medium according to the present invention will be described. Referring to FIG. 27, magneto-optical recording medium 2710 is reproduced by irradiating a laser beam from optical head 36 and applying a magnetic field from magnetic head 37. The reproduced signal and the error signal optically reproduced by the optical head 36 are respectively converted into a reproduced signal amplifier circuit 40 and a servo circuit 39.
Sent to The reproduced signal is amplified by the reproduced signal amplifier circuit 40 and sent to the low-pass circuit 41. The reproduction signal sent to the low-pass circuit 41 is integrated by the low-pass circuit 41 and sent to the decoder 43 and the clock generation circuit 42. The clock generated by the clock generation circuit 42 is sent to the servo circuit 39, the first synchronization signal generation circuit 44, the second synchronization signal generation circuit 45, and the decoder 43. The servo circuit 3
Reference numeral 9 controls the objective lens in the optical head 36 to rotate the spindle motor 38 at a predetermined number of revolutions based on the sent error signal and clock, and performs tracking servo and focus servo. The decoder 43 demodulates a signal modulated at the time of recording in synchronization with the transmitted clock, and outputs a demodulated reproduced signal as reproduced data. The first synchronizing signal generating circuit 44 generates a synchronizing signal for irradiating a pulsed laser beam based on the transmitted clock, and sends the synchronizing signal to the laser driving circuit 35. The laser drive circuit 35 controls the optical head 36 based on the transmitted synchronization signal to pulse the reproduction laser beam. The second synchronizing signal generating circuit 45 generates a synchronizing signal for applying a pulsed magnetic field based on the transmitted clock, and sends the synchronizing signal to the magnetic head driving circuit 34. The magnetic head drive circuit 34 controls the magnetic head 37 based on the transmitted synchronization signal to pulse the applied magnetic field. In addition, RAD
When the super-resolution magneto-optical recording medium 11 is reproduced, the magnetic head 37 is controlled by the magnetic head drive 34 before the reproduction operation starts, and the magnetization of the reproducing layer of the super-resolution magneto-optical recording medium 11 is completely reduced. It is necessary to initialize in the direction of the initialization magnetic field. Other operations are the same as above. In this case, the applied initialization magnetic field is 1 k
The range is Oe or less.

There are three methods for generating a clock in the clock generation circuit 42. The first method is self-PLL synchronization, the second method is external PLL synchronization, and the third method is two-period sampling. Referring to FIG. 28, the self-PLL synchronization, which is the first method, is to generate a clock in accordance with a reproduced signal. Referring to FIG. 29, in the external PLL synchronization, which is the second method, pits 10p are provided at regular intervals in the land 10R (or groove) of the magneto-optical recording medium, and the pits 10p are optically detected. The clock is generated in accordance with the detected cycle. In this case, what is provided on the land 10R at a constant period need not be limited to pits, but may be optically detectable. Referring to FIG. 30, the two-period sampling, which is the third method, is to generate a clock having a frequency higher than the unit bit so that one or more clocks are inserted between the unit bits. In the present invention, when the applied magnetic field and the laser beam are pulsed, the clock may be generated using any of the above three methods.

The magneto-optical recording medium is reproduced by applying / irradiating a magnetic field and a laser beam. In this case, since each of the magnetic field and the laser beam can select either “continuous” or “pulse”, the following four combinations are available.

(1) Laser beam: continuous light, magnetic field: continuous magnetic field (2) Laser beam: continuous light, magnetic field: pulse (3) Laser beam: pulse, magnetic field: continuous magnetic field (4) Laser beam: pulse, magnetic field: Pulse In the case of the above (1), the relationship between the irradiation of the laser beam and the application of the magnetic field does not matter, so that no particular explanation is required. In the case of the above (2), referring to FIG. 31, the external magnetic field Hep applied in the process of magnetic domain expansion and the external magnetic field Hsr applied in the process of magnetic domain annihilation are not equal in magnitude and the external magnetic field Hep Is smaller than the external magnetic field Hsr. The time T1 for magnetic domain expansion is shorter than the time T2 for magnetic domain disappearance, and 0.15 ≦ T1 /
It is determined so as to satisfy (T1 + T2) ≦ 0.6. In the case of the above (3), the duty of the pulse of the laser beam is in the range of 20 to 70%. Further, the above (4)
In the case of, with reference to FIG. 32, in each of T1 and T2, a laser beam is irradiated so that the laser beam is turned ON / OFF once, and a magnetic field is applied. In the present invention, any of the above methods may be used.

Referring to FIG. 33, the dependence on the applied magnetic field when the laser beam is converted to continuous light and the magnetic field is pulsed for reproduction is shown. In this case, the structure of the magneto-optical recording medium is the same as that shown in FIG. 22, and the laser beam has a wavelength of 830.
nm, the power is 1.65 mW, and the linear velocity of the magneto-optical recording medium is 1.7 m / sec. Also, the recording is 0.4μ.
This was done by recording m domains at equal intervals. The duty of the pulse of the magnetic field is T1 / T2: 1. As the externally applied magnetic field increases, the detected signal intensity increases, and reaches a saturation level at 260 Oe. The increase in the reproduction signal by the application of the external magnetic field indicates that the magnetic domain transferred from the recording layer to the reproduction layer is expanded. (Sixth Embodiment) In the fifth embodiment, the magnetic domain transferred from the recording layer to the reproducing layer is enlarged and reproduced by applying an external magnetic field. A description will be given of an embodiment in which a magnetic domain transferred from a recording layer to a reproducing layer is enlarged and reproduced without applying an external magnetic field.

Referring to FIG. 34, the structure of the magneto-optical recording medium according to the sixth embodiment is such that a dielectric layer 225 made of SiN is formed on a transparent substrate 226 made of glass, polycarbonate or the like.
This is a structure in which a reproducing layer 4A made of GdCo, a nonmagnetic layer 3A made of SiN, a recording layer 222 made of TbFeCo, and a protective layer 221 made of SiN are sequentially deposited. The magnetic film used for the reproducing layer 4A has a magnetic domain of the recording layer 2A.
It is a material larger than 22 magnetic domains. Therefore, when the magnetization of the recording layer 2 is transferred to the reproducing layer 4A via the nonmagnetic layer 3A, the magnetic domain of the recording layer 222 can be reproduced as a large magnetic domain without expanding the magnetic domain by applying an external magnetic field. . The structure of the magneto-optical recording medium according to the sixth embodiment is such that GdF is provided between the non-magnetic layer 3A and the reproducing layer 4A.
A structure in which an intermediate magnetic layer made of eCo is inserted may be used.

Each layer is formed by magnetron sputtering using Ar gas, and the conditions for forming each layer are the same as in FIG. 39 of the first embodiment. In the sixth embodiment, a super-resolution magneto-optical recording medium using a CAD method is used as the magneto-optical recording medium. Referring to FIG. 35, a recording layer 222 on which a signal is recorded, a nonmagnetic layer 3A, and a reproducing layer 4 which becomes an in-plane magnetic film at room temperature and a perpendicular magnetic film at a predetermined temperature or higher.
B-based super-resolution magneto-optical recording medium 3 using a CAD method
When the laser beam is applied to the region 514, the magnetization of the magnetic domain 3515 recorded in the region heated to a predetermined temperature or higher is changed via the nonmagnetic layer 3A to the magnetic domain 3516 of the reproducing layer 4B.
Is transferred to In this case, the transfer from the magnetic domain 15 to the magnetic domain 3516 is performed by magnetostatic coupling. As a result, the reproduction layer 4
The B magnetic domain 3516 is entirely magnetized downward. Therefore, the magnetic domains transferred from the recording layer 222 to the reproducing layer 4B can transfer larger magnetic domains to the reproducing layer without the process of expanding the magnetic domains by applying a magnetic field from the outside without the magnetic domain. After the magnetic domain 3515 is reproduced, when the irradiation position of the laser beam moves to the position of the magnetic domain 3517 to be reproduced next, the effective magnetic anisotropy of the magnetic domain 3516 decreases, and the magnetization of the magnetic domain 3516 changes its in-plane direction. Turn around. When the magnetic domain 3517 to be reproduced next and the region of the magnetic domain 3516 on the magnetic domain 3517 reach a predetermined temperature or higher, the effective magnetic anisotropy of the magnetic domain 3516 increases, and the upward magnetization is transferred. , The signal of the magnetic domain 3517 is reproduced. After the reproduction, the temperature becomes low, and the magnetization of the magnetic domain 3516 faces in the plane. By repeating this, the super-resolution magneto-optical recording medium 3514 by the CAD method is reproduced. The reproducing layer 4
The magnetic film used for B becomes an in-plane magnetic film at room temperature and becomes a perpendicular magnetic film at a predetermined temperature or higher, and the magnetic domain may be any material as long as it is larger than the magnetic domain of the recording layer 222.
A magnetic film composed of an element selected from among the above is suitable.
Further, as the recording layer 222, TbFeCo, Tb,
It may be a single-layer magnetic film or a multilayer magnetic film composed of an element selected from Dy and Nd and an element selected from Fe, Co and Ni. Further, a single-layer magnetic film or a multi-layer magnetic film composed of one element of Pt and Pd and an element selected from Fe, Co, and Ni may be used.

The predetermined temperature at which the in-plane magnetization film changes to the perpendicular magnetization film is in the range of 140 to 180 ° C., and the temperature coefficient C indicating the sharpness of the change from the in-plane magnetization film to the perpendicular magnetization film.
Is 8.0 or more as in the fifth embodiment. The super-resolution magneto-optical recording medium 3514 is not limited to the structure shown in FIG.
Instead of the nonmagnetic layer 3A, a structure may be used in which a magnetic film that becomes an in-plane magnetic film at room temperature and a perpendicular magnetic film at a predetermined temperature or higher is inserted. Referring to FIG. 38, super-resolution magneto-optical recording medium 3822
Is composed of a recording layer 2, an intermediate magnetic layer 3C and a reproducing layer 4C,
As the intermediate magnetic layer 3C, a magnetic film having the same size of the magnetic domain as the recording layer 222 and changing from an in-plane magnetization film to a perpendicular magnetization film at a predetermined temperature or more is applied. As the intermediate magnetic film 3C,
GdFeCo, GdFe and GdCo are suitable. The reproducing layer 4C also changes from an in-plane magnetization film to a perpendicular magnetization film at a predetermined temperature or higher.
It is in the range of 70 ° C. In the magneto-optical recording medium having this structure, the reproduction characteristic is determined by the steep change of the intermediate magnetic layer 3C from the in-plane magnetic film to the perpendicular magnetic film. Therefore, the temperature coefficient C of the magnetic film used for the intermediate magnetic layer 3C is 8.0 or more.

When the super-resolution magneto-optical recording medium 3822 is irradiated with a laser beam and the temperature of the magnetic domain 3823 of the recording layer 222 is raised, the magnetization of the magnetic domain 3823 is transferred to the magnetic domain 3824 of the intermediate magnetic layer 3C by exchange coupling force. Are further transferred to the magnetic domain 3825 of the reproducing layer 4C. As a result, the small magnetic domains 3823 of the recording layer 222 are reproduced as the large magnetic domains 3825 of the reproducing layer 4C. When the intermediate magnetic layer 3C is used, it is not necessary to apply an external magnetic field regardless of whether an in-plane magnetic film or a perpendicular magnetic film is used as the reproducing layer.

In the sixth embodiment, it is not necessary to apply an external magnetic field for enlarging / erasing magnetic domains transferred to the reproducing layer. Therefore, it is sufficient to irradiate only the laser beam to reproduce the magneto-optical recording medium, and the method of irradiating the laser beam includes a method of irradiating continuous light and a method of irradiating pulse light. The duty for pulsed light is 20 ~
It is in the range of 70%.

Referring to FIG. 36, a reproducing operation of the super-resolution magneto-optical recording medium according to the sixth embodiment will be described.
The magneto-optical recording medium 3514 by the CAD system is reproduced by irradiating a laser beam from the optical head 36. The reproduced signal and error signal optically reproduced by the optical head 36 are sent to a reproduced signal amplifier circuit 40 and a servo circuit 39, respectively. The reproduced signal is amplified by the reproduced signal amplifier circuit 40 and sent to the low-pass circuit 41. The low-pass circuit 41
The reproduced signal sent to the decoder is integrated by a low-pass circuit 41 and sent to a decoder 43 and a clock generation circuit. The clock generated by the clock generating circuit 42 is
9, are sent to the first synchronization signal generation circuit 44 and the decoder 43. The servo circuit 39 rotates the spindle motor 38 at a predetermined number of revolutions based on the transmitted error signal and clock, controls the objective lens in the optical head 36, and performs tracking servo and focus servo. The decoder 43 demodulates a signal modulated at the time of recording in synchronization with the transmitted clock, and outputs a demodulated reproduced signal as reproduced data. The first synchronizing signal generation circuit 44 generates a synchronizing signal for irradiating a pulsed laser beam based on the transmitted clock, and sends the synchronizing signal to the laser driving circuit 35. The laser drive circuit 35 controls the optical head 36 based on the transmitted synchronization signal to pulse the reproduction laser beam. When the super-resolution magneto-optical recording medium 3514 is reproduced by a continuous laser beam, the first synchronizing signal generation circuit 4
5, no synchronization signal is sent to the laser drive circuit 35, and the laser drive circuit 35
The semiconductor laser in 6 is continuously turned on.

The super-resolution magneto-optical recording medium 3514
When reproducing a laser beam with a pulsed laser beam, the clock generating circuit 42 generates a clock by the same three methods as shown in FIGS. 28, 29 and 30 in the fifth embodiment. Applicable. In the production of the magneto-optical recording medium shown in the fifth and sixth embodiments, the reproducing layer 224 is formed after the dielectric layer 225 made of SiN is formed on the substrate 226. Before forming the 224, the surface of the dielectric layer 225 is etched and flattened, and then the reproducing layer 4 is formed. The etching conditions are magnetron sputtering using Ar gas, and the power is 0.05 to 0.20 W.
/ Cm ² , and the time is preferably in the range of 15 to 30 minutes. As a result, a magnetic film having large anisotropy can be formed, and the reproduction characteristics of the magneto-optical recording medium can be improved.

The magnetic films disclosed in the fifth and sixth embodiments have an amorphous structure. (Seventh Embodiment) A seventh embodiment of the present invention will be described with reference to the drawings. However, in the following embodiments, for reproducing the magneto-optical recording medium, an appropriate one of the above-mentioned reproducing means is used.

As described above, in the magneto-optical recording medium of the present invention, 10 per 10 mm 2 is used.
Since a very large amount of information can be recorded at a very high density of 0 MB, for example, characters, voices, still images, and three-dimensional still images can be recorded with a substrate area of one yen coin.
A moving image of 5 minutes or more can be recorded and reproduced. In the seventh embodiment, as shown in FIG.
1 is 10 mm square, and an adhesive tape 5
02 is provided so that it can be attached anywhere.

For example, FIG.
An example of pasting into personal appeal information, for example,
A medium 501 that records the date of birth, place of birth, hobby, sales point, and the like is created, and the cover of the adhesive tape 502 on the back of the medium 501 is peeled off and attached to a business card 503. The information pasted on the business card 503 is reproduced by the appropriate reproducing means described above.

Further, since the medium 501 can record a very large amount of information at a high density as described above, in addition to the above-mentioned individual appeal information, three-dimensional image information of an individual's face is recorded. In this way, the degree of appeal when the person who receives the business card reproduces the information becomes very high. The display of this stereoscopic image is performed, for example, in "Television Society 3
This can be realized by using a combination of a polygon expression method and a texture mapping method as described in “Dimension CG”. The polygon data and texture data recorded on the medium 501 can be obtained, for example, by scanning the object with a three-dimensional scanner.

For example, as shown in FIG. 40, the information recording device 504 for recording information on the medium 501 includes an information recording unit 505 and a keyboard 5 for inputting data such as the date of birth and hobbies.
06, and a stereoscopic scanner 507 for inputting stereoscopic image data is added as necessary. Then, by inputting data from the keyboard 506 or the three-dimensional scanner 507 to the information recording unit 505, the medium 501 on which information is recorded (having a pasting function) is carried out.

The information recording device 504 can be widely spread, for example, by being installed as a toll device in a convenience store or a game center.
The user can use the medium 501 like a seal. In the seventh embodiment, the example in which the medium 501 is attached to the business card 503 has been described. However, for example, the following application examples may be considered.

(A) The medium 501 is attached to a hard plastic card 508 having the same size as the business card (in FIG. 39, written in parallel with the reference numeral of the business card 503). In this case, medium 5
01, address, name, age, date of birth, etc.
By recording personal verification information such as a number, the card 508 can be easily realized as a personal identification card (ID card).

If the image data of the face of an individual is recorded as the individual collation information, the identification effect becomes more effective. (B) A product use manual (handling manual) is recorded on the medium 501, and this is attached to the product package 509 as shown in FIG. The sticking place may be any place other than the package, such as a warranty card or the product itself, as long as it is easily visible as a use manual.

(C) Instructions for visually understanding the use manual of the product are recorded on the medium 501, and are attached to predetermined portions of the manual for the product.
In recent years, the complexity of manuals for using personal computers and word processors has been increasing, and the information on this medium 501 is used as a means for making the manual easier to understand.

(D) As shown in FIG. 42, the medium 501 is a compact disk (hereinafter referred to as a CD) package 5.
Paste on 10. In this case, the medium 501 records the campaign information of the CD product, the profile of the music artist, and the like. (E) As shown in FIG. 43, the medium 501 is formed in a donut shape, and is adhered concentrically to the CD 511 in a margin on the inner peripheral side of the CD 511.

Thus, the CD 511 and the medium 5
01 can be reproduced at the same time, and it is more effective to record an image matched to music, such as a CDV or a video CD, on the medium 501. The CD 511 and the medium 501 may not be played back simultaneously. In this case, as described in (d) above, the campaign information of the CD product, the profile of the music artist, and the like may be recorded on the medium 501. .

(F) As shown in FIG. 44, the medium 501 is attached to the book 512. In this case, the medium 501 records book campaign information, author profile, and the like. In addition, all the contents of the book, computer programs related to the contents of the book, and the like may be recorded. If the contents of the book 512 are cartoon-like,
The conversation of the manga may be recorded as audio, or may be recorded as a moving image. It should be noted that the place to be pasted may be any place such as the front cover, the back cover, or the spread of the book 512, and it is most effective to paste the book 512 to a place closely related to the recorded information.

In the above application example, if the information to be recorded on the medium 501 is three-dimensional, such as a person, an animal, and a vehicle, the information may naturally be recorded as three-dimensional image data. Regardless of whether the data is a moving image or a still image, the medium 501 in the present embodiment has a sufficient capacity. (Eighth Embodiment) An eighth embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 45, the medium 513 according to the eighth embodiment has a size of 10 mm square like the medium 501 and is fitted into an opening 515 provided in a hard plastic card 514. Accordingly, it is fixed by means such as adhesion or welding. This card 514 can be realized as an ID card as in the application example of the above (A). In particular, in the medium 513 of the eighth embodiment, stereoscopic image data of an individual's face is recorded as an essential requirement.
Individual verification can be performed very easily. (Ninth Embodiment) A ninth embodiment of the present invention will be described with reference to the drawings.

The ninth embodiment differs from the eighth embodiment in that an opening 51 is formed in an IC card 517 on which an IC chip 516 is mounted as a hard card, as shown in FIG.
5 is provided, and the medium 513 is attached. In this manner, the IC chip 516 and the medium 513 are
Address, name, date of birth, phone number,
Data with a small amount of information, such as office, department, ID number, etc., can be recorded on a small-capacity IC chip 516, and data with a large amount of information, such as stereoscopic image information, can be recorded on a medium 513. In addition, the function as an IC card is improved.

It should be noted that the present invention is not limited to the above embodiment, and the same operation and effect can be obtained even if the present invention is implemented as follows. A. In the seventh embodiment, a pasteable medium 501 is used.
Adhesive tape 502 that can be attached and detached a plurality of times is selected. This makes it easy to rewrite the recorded contents, and can easily respond to changes in personal information, version upgrades of manuals, and the like.

B. In the seventh embodiment, as the medium 501 that can be attached, as shown in parentheses in FIG.
The shape is not limited to the present embodiment, such as using a coin shape. C. As a type of the recording medium, an optical recording medium, a magnetic recording medium, or the like may be used. However, from the viewpoint of high density and large capacity, the magneto-optical recording medium described in the present embodiment is most suitable.

It is to be noted that, among these media, those that cannot be rewritten do not necessarily require the detachable function.

[0074]

According to the present invention, business cards, optical disks,
Effective information can be easily mounted on an attached member such as a book, an ordinary card can be easily realized as an ID card, and an ID function of an existing IC card can be easily improved. Therefore, the convenience as an information recording medium is high.

In particular, without using an IC chip,
A card that can record more information than a card can be provided at low cost. Further, by using an image, particularly stereoscopic image information, as the information, the visual effect and the identification effect are very good. In particular, by performing information recording on a high-capacity recording unit or a magneto-optical recording unit, it is possible to realize a compact, large-capacity, and low-cost information recording medium.

Further, an attachable information recording medium on which necessary information is recorded can be easily obtained, and effective information can be easily added to a member to be attached.

[Brief description of the drawings]

FIG. 1 is a diagram showing a card having a high-density recording area.

FIG. 2 is a diagram showing an apparatus for recording or reproducing a signal in a recording area provided on a card.

FIG. 3 is a diagram illustrating a mechanism for recording or reproducing a signal in a recording area provided on a card.

FIG. 4 is a diagram showing another mechanism for recording or reproducing a signal in a recording area provided on a card.

FIG. 5 is a diagram illustrating an optical system that records or reproduces a signal in a recording area according to the first embodiment.

FIG. 6 is a diagram showing a card having another type of recording area and an apparatus for recording or reproducing signals on the card.

FIG. 7 is a diagram showing an apparatus for recording or reproducing a signal in a recording area provided on a tape.

FIG. 8 is a diagram showing another apparatus for recording or reproducing a signal in a recording area provided on a tape.

FIG. 9 is a diagram showing an apparatus for recording or reproducing signals on a circular disk.

FIG. 10 is a diagram showing another apparatus for recording or reproducing a signal on or from a circular disk.

FIG. 11 is a diagram showing an apparatus for recording or reproducing a signal on a card having a circular recording area.

FIG. 12 is a diagram showing an apparatus for recording or reproducing a signal on a card having a circular recording area.

FIG. 13 is a diagram showing an apparatus for recording or reproducing a signal on or from a circular disc inserted into a card.

FIG. 14 is a diagram showing an apparatus for recording or reproducing a signal in a recording area provided on the card with the card interposed therebetween.

FIG. 15 is a diagram illustrating an apparatus that records or reproduces a signal in a recording area provided on the card with the card interposed therebetween.

FIG. 16 is a diagram illustrating an apparatus that records or reproduces a signal in a recording area provided on the card with the card interposed therebetween.

FIG. 17 is a diagram showing an apparatus for recording or reproducing a signal in a recording area provided on a card from one side.

FIG. 18 is a diagram showing a temperature distribution in a laser beam.

FIG. 19 is a diagram showing transfer of magnetization from a recording layer to a reproduction layer in a super-resolution magneto-optical recording medium according to a CAD system of a fifth embodiment.

FIG. 20 is a diagram illustrating an applied magnetic field for expanding a magnetic domain according to a fifth embodiment.

FIG. 21 shows data for determining the magnitude of an external magnetic field required for magnetic domain expansion in the fifth embodiment.

FIG. 22 is a diagram illustrating a structure of a magneto-optical recording medium according to a fifth embodiment.

FIG. 23 is a diagram illustrating a minimum magnetic domain diameter according to the fifth embodiment.

FIG. 24 is a diagram illustrating the disappearance of a magnetic domain according to the fifth embodiment.

FIG. 25 is a diagram illustrating transfer of magnetization from a recording layer to a reproduction layer in a super-resolution magneto-optical recording medium according to a fifth embodiment of the RAD method.

FIG. 26 is a diagram illustrating transfer of magnetization from a recording layer to a reproduction layer in a super-resolution magneto-optical recording medium according to a fifth embodiment of the FAD method.

FIG. 27 is a block diagram of a playback device according to a fifth embodiment.

FIG. 28 is a diagram illustrating self-synchronization according to the fifth embodiment.

FIG. 29 is a diagram illustrating external synchronization according to the fifth embodiment.

FIG. 30 is a diagram illustrating two-period sampling according to the fifth embodiment.

FIG. 31 is a diagram illustrating a pulse magnetic field applied in a magnetic domain expansion process according to a fifth embodiment.

FIG. 32 is a diagram illustrating timings of application of a pulsed laser beam and a pulsed external magnetic field according to the fifth embodiment.

FIG. 33 shows data demonstrating magnetic domain expansion in the magneto-optical recording medium of the fifth embodiment.

FIG. 34 is a diagram illustrating a structure of a magneto-optical recording medium according to a sixth embodiment.

FIG. 35 is a diagram illustrating transfer of magnetization from a recording layer to a reproduction layer in a super-resolution magneto-optical recording medium according to a CAD system of a sixth embodiment.

FIG. 36 is a diagram showing a block diagram of a playback device of a sixth embodiment.

FIG. 37 is another example of the super-resolution magneto-optical recording medium of the fifth embodiment.

FIG. 38 is another example of the super-resolution magneto-optical recording medium according to the CAD system of the sixth embodiment.

FIG. 39 is a diagram showing an application example of the seventh embodiment.

FIG. 40 is a block diagram of an information recording device.

FIG. 41 is a diagram illustrating an application example of the seventh embodiment.

FIG. 42 is a diagram illustrating an application example of the seventh embodiment.

FIG. 43 is a diagram illustrating an application example of the seventh embodiment.

FIG. 44 is a diagram illustrating an application example of the seventh embodiment.

FIG. 45 is a diagram illustrating an application example of the eighth embodiment.

FIG. 46 is a diagram showing an application example of the ninth embodiment.

[Explanation of symbols]

 1 card 2 recording area 501 magneto-optical recording medium 502 adhesive tape 503 business card 504 information recording device 505 information recording unit 506 keyboard 507 three-dimensional scanner 508 card 509 package 510 package 511 CD 512 book 513 magneto-optical recording medium 514 card 515 opening 516 IC Chip 517 IC card

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Seizou Kato 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Makoto Kanagawa 2-chome, Keihanhondori, Moriguchi-shi, Osaka No. 5-5 Sanyo Electric Co., Ltd. (72) Inventor Seiji Kajiyama 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd.

Claims (19)

[Claims] 1. An information recording medium comprising: an area in which information such as images, sounds, and characters are recorded; and an adhesive portion that can be attached to a member to be attached. 2. The information recording medium according to claim 1, wherein personal information is recorded as said information. 3. The information recording medium according to claim 2, wherein the personal information includes personal image information. 4. The information recording medium according to claim 1, wherein the member to be attached is a business card. 5. The member to be pasted is an article such as an optical disk or a book on which main information such as images, sounds, and characters are recorded, or an article such as an electric product, and the information is the main medium or the article itself or the article itself. 2. The information recording medium according to claim 1, wherein the information recording medium is related to main information recorded on the main medium. 6. An information recording medium having at least an area in which image information for personal verification is recorded. 7. An information recording medium, wherein a hard card is provided with an information recording member having at least an area for recording image information for personal verification. 8. The information recording medium according to claim 7, wherein said hard card has an IC chip. 9. The information processing apparatus according to claim 1, wherein the area for recording the information includes a high-capacity recording unit.
The information recording medium described in the section. 10. The information recording medium according to claim 1, wherein the area for recording the information comprises a magneto-optical recording section. 11. A card-shaped information recording medium having a high-capacity recording unit for recording information such as images, sounds, and characters. 12. A card-shaped information recording medium having a magneto-optical recording section for recording information such as images, sounds, characters and the like. 13. The information recording medium according to claim 11, wherein personal information is recorded as the information. 14. The information recording medium according to claim 13, wherein said personal information includes personal image information. 15. The information recording medium according to claim 3, wherein the information comprises stereoscopic image data. 16. The information recording medium according to claim 15, wherein polygon data is used as said stereoscopic image data. 17. The magneto-optical recording section has a structure in which at least one reproducing layer and at least one information recording layer are stacked on a substrate, and the information recording layer is irradiated with an energy beam. The information recording medium according to any one of claims 10, 12, 13, 14, 15, and 16, wherein the information recorded in the information recording medium is transferred to the reproduction layer. 18. An input means for inputting necessary information to an information recording medium having an adhesive portion that can be attached to a member to be attached, and data corresponding to the input from the input means is recorded on the information recording medium. An information recording device comprising: recording means. 19. The apparatus according to claim 1, wherein said input means includes means for inputting at least three-dimensional image data.
9. The information recording device according to 8.