JP2013218750A - Information medium, disk drive device, information recorder, information reproducing device, and method for manufacturing information medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information medium which has high recording density, is hardly affected by thermal interference and has high reliability in a patterned medium for performing recording of one bit per particle being a recording unit.SOLUTION: In a disk-shaped information medium, a recording layer obtained by arranging a plurality of particles in a hexagonal closed-packed structure is formed on a substrate. In the information medium, a first particle is different from a particle adjacent to the first particle, and the recording layer is formed such that a direction for connecting the center of the first particle and the center of the second particle is parallel with a circumferential direction of the information medium in the second particle located closest from the first particle.

Description

  The present invention relates to an information medium, an information recording apparatus, an information reproducing apparatus, and an information medium manufacturing method capable of recording one bit per fine particle as a recording unit and capable of high-density recording.

  In recent years, with the increase in digital contents, there has been a demand for an increase in capacity of storage devices, and information media and information recording / reproducing apparatuses have been further increased in capacity and size.

  Currently, platters used as information media in hard disk drives that are widely used as large-capacity recording devices generally have a structure in which a film of magnetic particles is formed on a disk-shaped glass or metal substrate. .

  In the platter, a certain number of magnetic particles are collectively recorded as a recording unit. However, as the recording density is increased, the recorded data cannot be kept stable. Faced with the challenge of reaching the physical limits.

  Therefore, the recording density of a continuous medium in which a magnetic film is simply formed on a conventional substrate disk is limited to about 1 terabit per square inch.

  Therefore, as a technique for further improving the recording density, an information medium called a patterned medium, in which fine particles of magnetic material serving as a recording unit are artificially regularly arranged, has recently attracted attention.

  In the patterned media, 1 bit can be recorded for each fine particle as a recording unit, so that even if the recording density is further increased as compared with the conventional storage medium, a configuration that is less susceptible to the influence of the thermal fluctuation is possible. There is an advantage.

  Hereinafter, an information medium using a conventional patterned medium will be described with reference to FIG.

  FIG. 8 is a plan view of a recording layer of an information medium using a conventional patterned medium. In the recording layer shown in FIG. 8, a plurality of recording track bands 101 are separated from each other by a band-shaped separation region 102. Has been. When the information medium of FIG. 8 is disk-shaped, the recording track band 101 is formed concentrically or spirally.

  Further, a plurality of regularly arranged recording cells 103 serving as recording units are formed in the recording track band 101.

  The recording cells 103 are periodically arranged with a pitch P along the track direction to form subtracks, and one recording track band 101 includes a plurality of subtracks.

  In FIG. 8, the recording track band 101 includes four rows of subtracks. Specifically, 101a, 101b, 101c, and 101d in FIG.

  In FIG. 8, since the recording cell 103 has a hexagonal close-packed structure, which is the most stable structure, and forms a triangular lattice, the two closest recording cells 103 located on adjacent subtracks are shown. The deviation in the track direction is P / 2.

  Such an information medium can be manufactured stably and inexpensively using self-assembled particles, since the recording cells 103 need only be regularly arranged and closely packed in the recording track band 101.

  The recording cell preferably has a hexagonal close-packed structure. This is because the hexagonal close-packed structure is the most stable structure in the self-organization of fine particles, and can be manufactured at the lowest cost with the fewest defects.

  In addition, as a recording method on the information medium, the near-field light that is magnetized after the coercive force of the magnetic recording medium is reduced by heating the nano-sized recording cell of the magnetic recording medium by irradiating near-field light. By irradiating light to a scatterer such as assisted magnetic recording or a minute metal, local plasmons are excited in a nanometer-sized minute region to locally enhance the photoelectric field in the vicinity of the minute scatterer. However, a plasmon recording system that records information by heating a minute recording cell below the diffraction limit using the near-field light is regarded as a promising next-generation recording / reproducing principle.

JP 2002-279616 A

  However, in the above-described conventional information medium, in order to realize an ultra-high density storage capacity, the recording cell is set to an extremely small size, for example, 10 nm or less, and further, adjacent recording cells are used to increase the recording density. For example, when the recording cell is irradiated with the near-field light, the recording cell interval is extremely narrow, so that thermal diffusion occurs from the recording cell and heat is generated in the adjacent recording cell. There has been a problem that interference occurs.

  That is, after writing a recording mark by irradiating a first recording cell with near-field light, and writing a recording mark by irradiating near-field light continuously on a second recording cell on the track, Since the heat generated from the first recording cell diffuses and reaches the second recording cell, the thermal state of the second recording cell changes, which affects the recording result. There was a problem.

  The present invention solves the above-mentioned problem, and is capable of high-density recording, a highly reliable information medium, a disk drive device that records information on the information medium, an information recording device, an information reproducing device, and An object is to provide a method for manufacturing an information medium.

  In order to solve the above problems and achieve the object, an invention according to claim 1 of the present invention is a disc-shaped information medium in which at least a recording layer is formed on a substrate, wherein the recording layer is a recording medium of information. Or a plurality of fine particles which are unit elements in reproduction, and the plurality of fine particles are arranged in the recording layer so as to form a hexagonal close-packed structure, and the first fine particles; The second fine particle that is different from the fine particles adjacent to the first fine particle and is closest to the first fine particle, the center of the first fine particle and the center of the second fine particle The recording layer is formed so that the direction connecting the two and the circumferential direction of the information medium are parallel to each other.

  Thereby, for example, it is possible to realize a highly reliable information medium having a high recording density and being less affected by thermal interference.

  According to a second aspect of the present invention, in order to record or reproduce information on the information medium according to the first aspect, the swing arm is formed at the tip of the swing arm and the information medium is recorded. A disk drive device comprising: a pickup element disposed opposite to a surface; and a motor that rotates the information medium and floats the pickup element by a predetermined distance by the rotational force.

  Accordingly, for example, by using the disk drive device, digital data recorded on the patterned medium can be stably recorded or reproduced. Therefore, a highly reliable and ultra-dense disk drive An apparatus can be realized.

  According to a third aspect of the present invention, in order to record information on the information medium according to the first aspect, the disk drive device according to the second aspect and a control device for controlling the disk drive device, It is an information recording device characterized by comprising.

  Thereby, for example, by using the information recording apparatus, digital data recorded on the patterned medium can be stably recorded, so that a highly reliable and ultra-high-density information recording apparatus is configured. It becomes possible.

  According to a fourth aspect of the present invention, in order to reproduce information from the information medium according to the first aspect, the disk drive device according to the second aspect and a signal from the disk drive device are processed. An information reproducing device comprising a signal processing device.

  Thus, for example, by using the information reproducing apparatus, digital data recorded on the patterned medium can be stably reproduced, so that a highly reliable and ultra-high density information reproducing apparatus is configured. It becomes possible.

  The invention according to claim 5 of the present invention is a method for manufacturing a disc-shaped information medium in which at least a recording layer is formed on a substrate, and a unit for recording or reproducing information on the recording layer. A plurality of fine particles as elements are formed in the recording layer so as to form a hexagonal close-packed structure, and the first fine particles and the fine particles adjacent to the first fine particles are different fine particles, In the second fine particle closest to the first fine particle, the direction connecting the center of the first fine particle and the center of the second fine particle is parallel to the circumferential direction of the information medium. In addition, the information recording medium is formed by forming the recording layer.

  As a result, for example, it is possible to manufacture a highly reliable information medium having a high recording density and little influence of thermal interference.

  According to the present invention, an information medium capable of greatly improving recording density and recording or reproducing more stably, a disk drive device capable of recording information on the information medium, and the disk drive device are used. An information recording apparatus, an information reproducing apparatus, and an information medium manufacturing method can be realized.

Configuration diagram of information medium in Embodiment 1 of the present invention Explanatory drawing of a recording cell configuration in Embodiment 1 of the present invention Configuration diagram of pickup in embodiment 2 of the present invention Configuration diagram of the disk drive device in Embodiment 3 of the present invention Configuration diagram of integrated pickup in Embodiment 4 of the present invention Configuration diagram of a disk drive device in Embodiment 5 of the present invention Configuration diagram of information reproducing apparatus or information recording apparatus in Embodiment 6 of the present invention Configuration diagram of conventional information media

  Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1)
FIG. 1 shows a plan view of a recording layer of an information medium 13 in Embodiment 1 of the present invention.

  The recording layer shown in FIG. 1 is formed on the surface of a disk-shaped glass or metal substrate, and a plurality of recording track bands 1 are separated from each other by a band-shaped separation region 2.

  In the recording track band 1, a plurality of particulate recording cells 3 as recording elements are arranged.

  The recording cells 3 are arranged concentrically or spirally on the disk-shaped substrate to form subtracks.

  The subtrack is composed of, for example, the same recording cell 3 on a straight line such as 1a, 1b, and 1c in FIG. 1, and in FIG.

  In FIG. 1, the recording cell has a hexagonal close-packed structure which is the most stable structure.

  By the way, in the conventional example shown in FIG. 8, adjacent recording cells in the same subtrack are in close contact, but unlike the conventional example of FIG. 8, in FIG. Are adjacent to each other.

  That is, in FIG. 1, the first recording cell 4 on the track of the straight line AA ′ constituting the subtrack has the same subtrack together with the second recording cell 5 across two adjacent cells on different tracks. It is composed.

  That is, in the second recording cell 5 which is the recording cell different from the first recording cell 4 and the recording cell adjacent to the first recording cell 4 and closest to the first recording cell 4, The recording layer is formed so that the direction connecting the center of the first recording cell 4 and the center of the second recording cell 5 is parallel to the circumferential direction of the information medium 13.

  In the case of such a configuration, for example, the first recording cell 4 is irradiated with near-field light, information is recorded, and then the second recording cell 5 is irradiated with near-field light. In recording, when the first recording cell 4 is irradiated with near-field light, thermal diffusion occurs due to heating by the near-field light, and the temperature of the recording cell adjacent to the first recording cell 4 is the center. However, in the configuration of FIG. 1, the distance from the first recording cell 4 to the second recording cell 5 is longer than the conventional configuration in FIG. Therefore, there is an advantage that thermal interference can be reduced.

  This structure will be described in more detail with reference to FIG.

  FIG. 2 is an enlarged view of a part of the recording track band 1 when the recording cells are arranged most densely, and FIG. 2A shows the structure of the conventional recording cell in FIG. 2 (b) shows the structure of the recording cell in this embodiment in FIG.

  As apparent from FIG. 2, when the diameter of the recording cell is d, in FIG. 2 (a), which is the structure of the conventional recording cell, the second cell adjacent to the first recording cell 4 on the same track. The distance to the recording cell 5 is d, and the second recording cell 5 adjacent to the first recording cell 4 is adjacent to the first recording cell 4 in FIG. The distance from the first recording cell 4 to the second recording cell 5 is about 1.73 times longer in this embodiment.

  By the way, with the same structure as the conventional example of FIG. 8, if the interval between the recording cells is wide, the effect of reducing the thermal interference can be obtained in the same manner. However, in this case, the recording density is lowered. There is. However, in the present embodiment, the recording cell 4 has the same hexagonal close-packed structure as the conventional example of FIG. 8, so that both the high recording density equivalent to the conventional one and the reduction of thermal interference can be achieved. It becomes possible.

  Such an information medium can be manufactured stably and inexpensively by using self-assembled particles, since it is sufficient that the recording cells are regularly arranged and closely packed in the recording track.

  The recording cell width is preferably 5 to 100 nm, and the shape of the recording cell is preferably a circle, an ellipse, a rectangle, or a square that can be densely packed, and particularly a circle that can be easily formed by self-organization.

  The recording cell preferably has a hexagonal close-packed structure. This is because the hexagonal close-packed structure is the most stable structure in the self-organization of fine particles, and can be manufactured at the lowest cost with the fewest defects.

  As described above, the information medium in the first embodiment is a disc-shaped information medium in which at least a recording layer is formed on a substrate, and the recording layer is a plurality of unit elements that are used for recording or reproducing information. Have fine particles. The plurality of fine particles are arranged in the recording layer so as to constitute a hexagonal close-packed structure. At this time, the first fine particle and the fine particle adjacent to the first fine particle are different fine particles, and the second fine particle closest to the first fine particle has a center of the first fine particle, The recording layer is formed so that the direction connecting the centers of the two fine particles is parallel to the circumferential direction of the information medium.

  According to the above configuration, for example, it is possible to realize a highly reliable information medium having a high recording density and little influence of thermal interference.

  In the information medium of the present invention, the regular array of recording cells may be formed in all the areas where the recording is written, or the address signal area and the like are formed in advance and the regular array of recording cells is formed as the data area. It may be. A regular array of recording cells may be formed in advance only in the servo mark area for tracking.

  As for the information medium used in the present invention, the configuration of only the recording layer has been described in the present embodiment. However, the present invention is not limited to this. For example, between the substrate and the recording layer or the recording layer A functional film having a function may be formed on the surface for purposes such as thermal diffusion, light absorption, and structural stabilization.

  Further, the information medium used in the present invention is not particularly limited, and examples thereof include those based on various recording principles. For example, a magnetic recording medium and a phase change optical recording medium are preferable, and a perpendicular magnetic recording medium capable of further increasing the density is preferable.

  In the present embodiment, the recording track band 1 is formed by being separated from each other by the band-shaped separation region 2. However, the present invention is not limited to this, and there is no separation region 2, and the recording track band 1 is recorded. It may be formed on the entire surface of the layer.

  Here, a method for manufacturing the information medium in the present embodiment will be described.

  The information medium manufacturing method in the present embodiment is a disk-shaped information medium manufacturing method in which at least a recording layer is formed on a substrate, and serves as a unit element for recording or reproducing information on the recording layer. A plurality of fine particles are formed in the recording layer so as to form a hexagonal close-packed structure, and the first fine particles and the fine particles adjacent to the first fine particles are different from each other, In the second fine particles at a short distance, the recording layer is formed so that the direction connecting the center of the first fine particle and the center of the second fine particle is parallel to the circumferential direction of the information medium.

  According to the above configuration, for example, it is possible to manufacture a highly reliable information medium having a high recording density and little influence of thermal interference.

(Embodiment 2)
FIG. 3 is a configuration diagram of the pickup according to the second embodiment of the present invention.

  The information medium 13 in FIG. 3 has the same configuration as that of the information medium in the first embodiment of the present invention, and a description thereof will be omitted.

  In FIG. 3, the laser light emitted from the laser light source 6 is converted into parallel light by the collimator lens 7 and is bent in the direction of the objective lens 10 by the mirror 8.

  The laser beam reflected by the mirror 8 passes through the beam splitter 9 and is condensed by the objective lens 10 onto the scatterer 12 formed on the surface of the substrate 11.

  The scatterer 12 can be made of, for example, a metal material such as gold, silver, platinum, aluminum, or chrome, or a material such as DLC or carbon nanotube. In order to avoid breakage and to move on the information medium 13, it may be fabricated so as to be embedded in the substrate 11 so as not to become an obstacle.

  When the scatterer 12 is irradiated with laser light, localized plasmons are excited on the scatterer, and the photoelectric field intensity in the vicinity of the scatterer is enhanced. That is, near-field light is generated.

  For example, when the shape of the scatterer is a cylindrical shape having a diameter of about 10 nm, the enhanced photoelectric field spread is about the diameter of the bottom metal body cylinder, that is, about 10 nm, which is the diffraction limit at the wavelength of the laser beam. Condensed spots of the following sizes can be obtained.

  When the scatterer is brought close to the information medium 13 by a certain distance, information can be recorded with a spot diameter of the extent of the light spread.

  In order to record information, the plasmon light generated by the scatterer 12 is set to an amount of light capable of recording information on the information medium 13.

  For reproduction, light having a lower incident light intensity than that at the time of recording is used, and a signal reflected or transmitted from the scatterer 12 is detected. As a result, it is possible to reproduce the information written in the minute area below the diffraction limit without overwriting.

  The reflected light from the scatterer 12 is reflected by the beam splitter 9 and condensed on the light detection element 16 by the detection lens 14.

  The electrical signal from the light detection element 16 that has received the reflected light from the scatterer 12 is sent as a reproduction signal 18 to a signal processing circuit (not shown), and the signal recorded on the information medium 13 is output as a digital signal. Is done.

  With this configuration, it is possible to record high-density information on the information medium with a light spot below the diffraction limit.

  In this embodiment, for example, a phase change recording medium is used as an information medium, and information is recorded or reproduced by near-field light having a minute size below the diffraction limit due to the generation of localized plasmons. Although the case has been shown, the present invention is not limited to this.

  For example, a perpendicular magnetic recording medium is used as an information medium, a magnetic head is disposed in the vicinity of the scatterer, and information is recorded on the perpendicular magnetic recording medium by heat-assisted magnetic recording using the minute spot by the near-field light as assist light. Alternatively, reproduction may be performed.

(Embodiment 3)
Next, a disk drive device according to Embodiment 3 of the present invention will be described with reference to FIG.

  FIG. 4 is a diagram showing the configuration of the disk drive device according to Embodiment 3 of the present invention.

  The information medium 13 in FIG. 4 has the same configuration as that of the information medium according to Embodiment 1 of the present invention, and a description thereof will be omitted.

  Further, the pickup 25 in FIG. 4 is the pickup in the second embodiment of the present invention, and the same components as those in FIG.

  As shown in FIG. 4, the disk drive apparatus in this embodiment includes a pickup 25, a spindle motor 20, a head drive unit (not shown), a signal processing unit 23, an interface 24, a servo control unit 21, a feed motor (not shown), and a system controller 22. It has.

  The spindle motor 20 is driven and controlled by the servo control unit 21 and is rotated at a predetermined rotational speed.

  The pickup 25 is disposed in the vicinity of the information medium 13 rotated by the spindle motor 20. In the pickup 25, the recording surface of the information medium 13 is generated by plasmon light generated by a scatterer disposed in the vicinity of the information medium. In addition, information is recorded, and an information signal is read from the information medium 13 based on the return light from the scatterer.

  The pickup 25 is supported so as to be movable in the vertical direction with respect to the recording track of the information medium 13, and is driven in the vertical direction with respect to the recording track of the information medium 13 by a feed motor (not shown).

  The signal processing unit 23 performs various signal processing on the signal output from the pickup 25. Specifically, the signal processing unit 23 includes a signal demodulator and an error correction circuit as an information signal reproduction system, and a signal modulator and the like as an information signal recording system. When the signal is reproduced, the signal processing unit 23 demodulates the reproduction signal read from the information medium 13 by the pickup 25 by the signal demodulator, and performs error correction by the correction circuit.

  The interface 24 transmits / receives data to / from an externally connected electronic device. The externally connected electronic device is, for example, an external computer.

  For example, when a reproduction operation is performed in the disk drive device, a reproduction signal subjected to signal processing in the signal demodulator and error correction circuit of the signal processing unit 23 is sent to an external computer via the interface 24.

  The servo control unit 21 servo-controls a lens driving unit such as a biaxial actuator that holds the objective lens 10 in the pickup 25 to move the objective lens 10 in the focusing direction and the tracking direction.

  The servo control unit 21 servo-controls a feed motor (not shown) that feeds the pickup 25.

  Further, the servo control unit 21 servo-controls the spindle motor 20 that rotationally drives the information medium 13. The servo control unit 21 performs servo control of each unit described above based on a control signal from the system controller 22. The system controller 22 controls each part constituting the disk drive device.

  When the disk drive device configured as described above reproduces information from the information medium 13, the signal processing unit 23 applies the reproduction signal read by the pickup 25 from the information medium 13 rotated by the spindle motor 20. The signal demodulator performs demodulation and error correction by a correction circuit. Then, the reproduction signal that has been subjected to signal processing is sent to an externally connected electronic device via, for example, the interface 24.

  Further, when recording information on the information medium 13, the disk drive device modulates the information signal by the signal modulator of the signal processing unit 23, and has a predetermined laser output based on the modulated information signal. Is irradiated from the pickup 25 to the information medium 13 rotated by the spindle motor 20.

  In the third embodiment, the pickup 25 corresponds to an example of a pickup, the spindle motor 20 corresponds to an example of a motor, and the servo control unit 21, the system controller 22, and the signal processing unit 23 correspond to an example of a control unit. To do.

(Embodiment 4)
FIG. 5 is a configuration diagram of an integrated pickup according to the fourth embodiment of the present invention.

  The integrated pickup of FIG. 5 has a configuration different from that of the second embodiment, and realizes the same function as the pickup in the second embodiment by integrating a laser chip, an optical waveguide, and the like on a substrate.

  As the substrate, a silicon substrate, a lithium niobate substrate, a glass substrate, or the like is used, an optical waveguide is formed on the surface of the substrate, and a laser light source, a photodetector, a scatterer, and the like are arranged using a technique such as a semiconductor process. To do.

  In FIG. 5, the laser light emitted from the semiconductor laser element 26 disposed on the end face of the substrate 35 propagates through the optical waveguide 27 formed on the surface of the substrate 35 and is separated into three lights by a branched waveguide structure or the like. Further, each of the laser beams passes through the taper coupler 28 having a taper structure, and then irradiates the first scatterer 29, the second scatterer 30, and the third scatterer 31.

  The integrated pickup shown in FIG. 5 is arranged so that the first scatterer 29, the second scatterer 30, and the third scatterer 31 are close to an information medium (not shown) at a minute interval. Thus, for example, information is recorded on or reproduced from the information medium using the plasmon light generated by the second scatterer 30, and the first scatterer 29 and the third scatterer 31 are used. A gap interval between the integrated pickup and the information medium is detected.

  Reflected light from the first scatterer 29 and the third scatterer 31 passes through the optical waveguide 27 again, and is branched by a Y-branch waveguide or the like. And the third light detection element 34.

  The electric signals output from the first photodetecting element 32 and the third photodetecting element 34 are converted into gap error signals by an arithmetic circuit (not shown).

  On the other hand, the reflected light from the second scatterer 30 passes through the optical waveguide 27 again, is branched by a Y-branch waveguide, etc., and is guided to the second light detection element 33.

  The electrical signal from the second photodetector 33 that has received the reflected light from the second scatterer 30 is sent to the signal processing circuit as a reproduction signal, and the signal recorded on the information medium is converted to a digital signal. Is output.

  By using the configuration of this embodiment, an ultra-small integrated pickup can be configured.

  In addition, since the optical element is integrated on the substrate, it is possible to reduce processes such as adjustment of optical parts and adhesive fixing by applying conventional microfabrication technology. Low and inexpensive pickup can be realized.

  Furthermore, since it is an integrated structure, it is difficult to be affected by changes over time, and a stable pickup can be realized.

(Embodiment 5)
Next, a disk drive device according to Embodiment 5 of the present invention will be described with reference to FIG.

  The fifth embodiment is an embodiment of a disk drive device provided with the pickup according to the fourth embodiment.

  Also, the information medium 37 in FIG. 6 has the same configuration as the information medium in Embodiment 1 of the present invention, and the description thereof is omitted.

  In FIG. 6, the disk drive device includes an information medium 37, an integrated element 39 as a pickup for recording or reproducing information, a swing arm 40 to which the integrated element 39 is fixed, and the integrated element 39. The voice coil actuator 38 that seeks to an arbitrary location on the information medium 37, the electrical signal from the optical integrated device 39 is processed, the reproduction signal, the control signal, etc. are output, and the position of the voice coil actuator 38 is controlled. It is comprised by the control circuit 54 etc. to perform.

  The information medium 37 is rotated at a high speed by the spindle motor 36, and the integrated element 39 is moved to a desired position on the information medium 37 via the swing arm 40 by the voice coil actuator 38.

  At this time, the integrated element 39 floats with an interval of several nm to several tens of nm with respect to the information medium 37 by the rotational force of the information medium 37.

  In the present embodiment, since the gap interval between the optical integrated device 39 and the information medium 37 can be easily determined by the rotational force of the information medium 37 without using a dedicated actuator, the disk drive device can be simplified. It can be realized by a configuration.

  As described above, when the optical integrated device 39 is levitated by the rotational force of the information medium 37, the flying height is mainly determined by the weight of the integrated device 39 and the rotational speed of the spindle motor 36. In comparison with the case of recording or reproducing information at a transfer rate, the spindle motor is rotated at a higher speed in this embodiment than in the conventional example, for example, 1.7 times faster. Can do. Therefore, since the greater levitation force can be obtained in recording or reproduction at the same transfer rate, the integrated element 39 and the information medium 37 can be obtained even when the weight of the optical integrated element 39 is heavier than the conventional one. It is possible to ensure the interval.

  The gap interval may be controlled to be constant by feedback control by an actuator (not shown) based on the gap error signal of the integrated element 39 in the fourth embodiment. As the actuator, for example, a piezo element can be used.

  As described above, the disk drive device according to the present embodiment is formed on the swing arm and the tip of the swing arm in order to record or reproduce information on the information medium described in the first embodiment, for example. And a motor that rotates the information medium and floats the pickup element by a certain distance by the rotational force.

  According to the above configuration, since digital data recorded on patterned media can be stably recorded or reproduced, it is possible to realize a highly reliable and ultra-dense disk drive device. It becomes.

(Embodiment 6)
Next, an information recording or reproducing apparatus according to Embodiment 6 of the present invention will be described with reference to FIG.

  The sixth embodiment is an embodiment of an information recording or reproducing device provided with the disk drive device according to the third or fifth embodiment.

  The information recording / reproducing device 45 shown in FIG. 7 is used for recording the image information on the information medium by the disk drive device 42 and the disk drive device 42 according to the third or fifth embodiment. A recording signal processing unit 43 that converts the information signal into an information signal and a reproduction signal processing unit 44 that converts the information signal obtained from the disk drive device 42 into image information are provided.

  In the sixth embodiment, the optical information recording or reproducing device 45 includes a recording signal processing unit 43 and a reproducing signal processing unit 44. However, the present invention is not particularly limited to this, and the recording information processing or reproducing device 45 is not limited thereto. The configuration may include only one of the signal processing unit 43 and the reproduction signal processing unit 44. Furthermore, the information recording or reproducing device may include an output device 46 such as a cathode ray tube or a liquid crystal display device for displaying information.

  In the sixth embodiment, the information recording or reproducing device corresponds to an example of an information recording device and an information reproducing device, and the recording signal processing unit 43 and the reproducing signal processing unit 44 are examples of an information processing unit. It corresponds to.

  The information recording / reproducing apparatus according to the sixth embodiment includes the disk drive device 42 according to the third or fifth embodiment, and records or reproduces information at an ultra-high density. Therefore, it is possible to stably record or reproduce information on the information medium for use in a wide range of applications.

  As described above, the information recording apparatus according to the present embodiment, for example, records the information on the information medium described in the first embodiment, the disk drive apparatus shown in the third or fifth embodiment, and the disc And a control device that controls the drive device.

  According to the above configuration, the digital data recorded on the patterned medium can be stably recorded, so that a highly reliable and ultra-high density information recording apparatus can be configured.

  In addition, the information reproducing apparatus according to the present embodiment, for example, in order to reproduce information from the information medium described in the first embodiment, the disk drive apparatus shown in the third or fifth embodiment and the disk drive apparatus. And a signal processing device for processing a signal from.

  According to the above configuration, digital data recorded on the patterned medium can be stably reproduced, so that a highly reliable and ultra-high density information reproducing apparatus can be configured.

  According to the present invention, there are provided an information medium capable of greatly improving recording density and recording or reproducing more stably, an information recording apparatus using the information medium, an information reproducing apparatus, and an information medium manufacturing method. It becomes possible to do.

DESCRIPTION OF SYMBOLS 1 Recording track band 2 Separation area 3 Recording cell 4 1st recording cell 5 2nd recording cell 6 Laser light source 7 Collimator lens 8 Mirror 9 Beam splitter 10 Objective lens 11 Substrate 12 Scattering body 13 Information medium 14 Detection lens 15 Converging light DESCRIPTION OF SYMBOLS 16 Photodetector 17 Operation circuit 18 Reproduction signal 19 Actuator 20 Spindle motor 21 Servo control part 22 System controller 23 Signal processing part 24 Interface 25 Optical pick-up 26 Semiconductor laser element 27 Optical waveguide 28 Tapered coupler 29 1st scatterer 30 1st Second scatterer 31 Third scatterer 32 First light detection element 33 Second light detection element 34 Third light detection element 35 Substrate 36 Spindle motor 37 Information medium 38 Voice coil actuator 39 Optical integrated element 40 Swing Arm 41 Control circuit 42 Disc drive device 43 Recording signal processor 44 Playback signal processor 45 Optical information recording or reproducing device 46 Output device 101 Recording track band 102 Separating region 103 Recording cell

Claims (5)

A disc-shaped information medium having at least a recording layer formed on a substrate,
The recording layer has a plurality of fine particles which are unit elements in recording or reproducing information,
The plurality of fine particles are arranged in the recording layer so as to constitute a hexagonal close-packed structure,
The first fine particles and the fine particles different from the fine particles adjacent to the first fine particles, the second fine particles closest to the first fine particles, the center of the first fine particles, An information medium, wherein the recording layer is formed so that a direction connecting the center of the second fine particles and a circumferential direction of the information medium are parallel to each other. In order to record or reproduce information on the information medium according to claim 1,
Swing arm,
A pickup element formed at the tip of the swing arm and disposed opposite the recording surface of the information medium;
A disk drive device comprising: a motor that rotates the information medium and causes the pickup element to float by a predetermined distance by the rotational force. In order to record information on the information medium according to claim 1,
A disk drive device according to claim 2;
An information recording apparatus comprising: a control device that controls the disk drive device. In order to reproduce information from the information medium according to claim 1,
A disk drive device according to claim 2;
An information reproducing apparatus comprising: a signal processing device that processes a signal from the disk drive device. A method for manufacturing a disc-shaped information medium in which at least a recording layer is formed on a substrate,
In the recording layer, a plurality of fine particles which are unit elements in recording or reproducing information are formed in the recording layer so as to constitute a hexagonal close-packed structure,
The first fine particles are different from the fine particles adjacent to the first fine particles, and in the second fine particles closest to the first fine particles, the center of the first fine particles, A method for manufacturing an information medium, wherein the recording layer is formed so that a direction connecting the centers of the second fine particles and a circumferential direction of the information medium are parallel to each other.

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