JP2002304740A - Recording carrier and its manufacturing method, and method and device for driving the recording carrier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording carrier to be authenticated relatively easily, its manufacturing method, and a method and a device for driving the recording carrier. SOLUTION: The driving method includes a step of authenticating a recording carrier based on the first and second authentication data of the recording carrier having a first area for storing desired data to be unwritable, a recordable second area for storing the first authentication data, and a third recordable area arranged opposite to the second area to hold the first area therebetween and for storing the second authentication data, and a step of controlling the driving of the first area based on the result of the authentication step.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention generally relates to drive control of a record carrier. The present invention provides, for example, a read-only area (hereinafter, referred to as a “ROM area”) in which data is stored in advance and only reproduction of the data is permitted, and a recordable area in which data can be newly or additionally recorded ( Less than,
It is called "RAM area". ) Is suitable for drive control of an optical disk in which both are mixed.

[0002]

2. Description of the Related Art Optical disks widely used as optical record carriers include CD-ROMs and DVDs (Digital Vegetable).
rsatile Disc) and additional recordable CD-R, various magneto-optical record carriers, DVD
There is a phase change record carrier such as a RAM. With the development of the information industry in recent years, the demands for optical record carriers are not limited to simply increasing the capacity, but also to the efficient arrangement and use of various types of information. In addition, there is a high demand for security management such as eliminating illegally copied products of such information.

[0003]

However, it has not been possible to simply and effectively remove illegally copied products (so-called pirated copies). For example, an authentication system that uses a key and a cipher requires a network and an authentication organization, and the authentication mechanism is complicated.

[0004] Accordingly, the present invention provides a novel and useful record carrier and a method for producing the same, which solve such conventional problems.
It is another object of the present invention to provide a method and an apparatus for driving the record carrier.

More specifically, it is an exemplary object of the present invention to provide a record carrier that is relatively easy to authenticate, a method of manufacturing the same, and a method and apparatus for driving the record carrier.

[0006]

In order to achieve the above object, according to one aspect of the present invention, there is provided a record carrier comprising: a first area in which desired data is stored in a non-rewritable manner;
And a third recordable area disposed opposite to the second area with the first area interposed therebetween.
In such a record carrier, a second area and a third area can be recorded, but the third area is arranged opposite to the second area with respect to the first area. For this reason, when driving the third area, the user is given an impression as if driving the first area, and information of the property to be stored in the second area is stored in the third area. Storing can reduce the risk of it being copied.
For example, the third area stores authentication data used to authenticate the record carrier. If a higher security level is desired, for example, the second area stores first authentication data, and the third area is used together with the first authentication data to authenticate the record carrier. The second authentication data is stored. The (first and second
The authentication data includes, for example, an identifier unique to the record carrier that distinguishes the record carrier from other record carriers. For example, the first and second authentication data may each store a unique identifier on the same record carrier, or may store data that combine to form one identifier.

[0007] The first area may be a read-only area, or may be a recordable area in which data is recorded in a non-rewritable manner in advance. If the first area is a read-only area, the second and third areas are recordable areas, so that the record carrier is a partial ROM type record carrier. Preferably, the third area is a write-once recordable area. Thus, it is possible to prevent the information recorded in the third area from being tampered with illegally.
The image processing apparatus further includes a write-once type recording film that covers the first to third regions. In this case, the second and third areas are write-once type recording areas. The first area may also be a write-once type recording area, but when configured as a read-only area, the record carrier functions as a partial ROM. In this case, it is difficult to apply a write-once type recording film over the entire surface.
In addition, the manufacturing is easier than the case where the coating is limited to only the third recording area.

The record carrier has a disk shape, the first area is a read-only area having a spiral first track extending in a first direction, and the second area is A spiral second track extending in a second direction opposite to the first direction may be provided on the same surface as the first track. Such a record carrier has first and second tracks, and each track can be assigned a recording area of the same or different structure, so that the information to be stored and the variation of usage can be increased. The information processing apparatus may further include a non-recordable area where information cannot be recorded between the first and second tracks, and the non-recordable area may be formed by crossing the first and second tracks. . The first and second tracks can be formed by the head up to the mirror surface with the non-recordable area as the mirror surface, but in this case, accurate positioning of the head is required. Therefore, by forming an unrecordable area by crossing both tracks, manufacturing becomes easy.

[0009] A non-recordable area may be further provided between the first and second tracks at least twice as large as the larger of the track pitches of the first and second tracks. Due to the non-recordable area, the independence of the first and second tracks can be maintained, and the width thereof is twice the larger of the track pitch of the first and second tracks (that is, the interval between adjacent tracks). With the above setting, crosstalk between both tracks can be sufficiently reduced. The first and second tracks may be independently addressed. Thereby, the recording / reproducing operation of the disc is stabilized.

The record carrier has a disk shape, the first area is a read-only area having a spiral first track, and the second area is on the same plane as the first track. A second track having a spiral shape extending in the same direction as the first track, further comprising a non-recordable area in which information cannot be recorded between the first and second tracks; The non-recordable area may be formed by crossing the first and second tracks. Such a record carrier can also maintain the independence of the first and second tracks by the non-recordable area.

According to another aspect of the present invention, there is provided a method for manufacturing a record carrier, comprising: a first area for storing desired data in a non-rewritable manner; Forming a region on the same plane of the substrate so that the region is disposed to face the second region with the first region interposed therebetween; and forming a write-once type recording film in the first and second regions. Laminating. This production method produces a record carrier having the above-described effects. The method also includes storing first authentication data in the second area, and storing the second authentication data used to authenticate the record carrier with the first authentication data in the third area. And storing the information in an area. Such a method also has the above-described effect.

According to another aspect of the present invention, there is provided a driving method, comprising: a first area for storing desired data in a non-rewritable manner; a second recordable area; and the second area sandwiching the first area.
Authenticating the record carrier based on the authentication data of the record carrier having a recordable third area that stores authentication data and that is arranged to face the area of Controlling the driving of the first region. Also, the method stores the first authentication data in the second area and stores the second authentication data in the third area.
May be stored, and the authentication step may be performed based on the first and second authentication data. In such a record carrier, the second area and the third area can be recorded, but the third area can be recorded.
The region is arranged opposite to the second region with respect to the first region. For this reason, according to the driving method described above,
Access to the third area for obtaining the (second) authentication data gives the user an impression as if accessing the first area, making it difficult for the user to realize the authentication action, and copying the authentication data. Danger can be reduced. As described above, if the number of authentication data is set to two, the security level is improved. If the authentication step has authenticated the record carrier, for example, the control step allows the reproduction of the data in the first area.

In the method, the first authentication data is read, and the second authentication data is read after the reading.
And reading out the authentication data. If the second authentication data is read out first, the existence of the third area may be perceived by the user, so that this is prevented. For the same reason, the method includes the steps of reading the second authentication data, accessing the first area after the reading step, and reading the first authentication data after the accessing step. It can have more.

In the case where the authentication step does not authenticate the record carrier, a step of notifying the user of the prohibition of driving (playback and / or recording) of the first area (by image, sound, music, text, or the like); Preferably, the method further comprises the step of: carrying out a product advertisement of a maker associated with the record carrier; and / or stopping the driving of the first area. The first step can inform the user that the record carrier is a pirated copy or the like. The next step may be to encourage the user to purchase a legitimate product, a replacement product, or even a new product. This last step can prevent the record carrier from being used subsequently.

[0015] The first and / or second authentication data further includes a reproduction condition (for example, an expiration date and the number of reproductions) of each data stored in the record carrier, and the method reads the history information and reads the history information. The method may further include a step of determining whether each data of the record carrier can be reproduced, and a step of determining reproduction of the data based on a result of the determining step. Thus, drive control can be performed for each data. Further, as described above, when the determination step determines that the reproduction of the specific data in the data is prohibited, the method may further include a step of notifying the user of the reproduction prohibition of the specific data. It is.

A program according to still another aspect of the present invention causes any one of the above methods to be executed. Such a program can be distributed via a computer readable medium such as a floppy (registered trademark) disk, or distributed via a network such as the Internet.

According to another aspect of the present invention, there is provided a driving device comprising: a first area for storing desired data in a non-rewritable manner;
And a third area which is arranged opposite to the second area with the first area interposed therebetween and stores the second authentication data. A drive device for driving a record carrier, comprising: an authentication unit that authenticates the record carrier based on the first and second authentication data; and a drive unit that drives the first area based on an authentication result of the authentication unit. And a control unit for controlling. Such a driving device also has one of the above-described functions.

Further objects and other features of the present invention will become apparent in preferred embodiments thereof described with reference to the accompanying drawings.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an optical disc 200 as an example of a record carrier applicable to the present invention will be described. Such a record carrier has an additionally recordable area 280 for recording authentication data described below in a non-rewritable manner. Such record carriers include, for example, a write-once optical disk and a partial RO described below with reference to FIGS.
An M-type optical disk or the like is suitable. Here, FIG. 2 is a schematic plan view of the optical disc 200, FIG. 3 is a more detailed schematic plan view of the optical disc 200, and FIG. Incidentally, a partial ROM type disk to which the present invention can be applied is, like a magneto-optical disk defined in the ISO standard, a read-only area in which prepits are formed, a data area formed only with address information pits and servo grooves. This includes a disk having a recording area on the same substrate, a type having a ROM area for storing management information of the entire disk in an inner peripheral portion such as a DVD-RAM and forming a RAM area in an outer peripheral portion.

As shown in FIG. 2 and FIG.
00 has, for example, a diameter of 120 mm and a center hole 210
, An inner peripheral part 220, an intermediate part 230, a buffer region 240 disposed between the inner peripheral part 220 and the intermediate part 230, and an outer peripheral part 280 outside the intermediate part 230. However, the outer peripheral portion 280 of the present embodiment is provided to the intermediate portion 23 for the user.
The region is sufficiently narrow that it is considered that 0 and the outer peripheral portion 280 constitute one outer peripheral portion. The inner circumference 220 is the disk 200
From the center to a radius of 30 mm.
Reference numeral 30 denotes an area from the buffer area 240 to a radius of 58 mm. Also, as shown in FIG.
Numeral 0 has a structure in which the reproduction control layer 250 is laminated on the substrate 202.

The substrate 202 is made of acrylic, polycarbonate, polymethine methacrylate, polymethylpentene,
It is made of a transparent resin substrate material such as polyolefin or epoxy. Alternatively, a transparent ceramic plate such as a glass plate on which a replica layer of a photocurable resin is formed on one surface may be used as the substrate 202. The substrate 202 is formed by injection molding using a stamper or the like in which a preformat signal is formed in the form of a pit, and a read-only area (ROM area) 220 is formed on the surface thereof. Data desired by a user of the driving device 100 is recorded in the ROM area 230.
The medium identifier of the optical disk 200 is stored in the ROM area 23.
0, but may be stored as a part of the authentication data in the RAM areas 220 and 280 described later.

A recording track 222 is formed in the inner peripheral part 220 in a spiral shape around the center hole 210. In the intermediate portion 230, a recording track 232 is formed in a spiral shape in a direction opposite to the recording track 222. When the optical disc 200 rotates clockwise, the recording position of the recording track 222 (that is, the head 110 of the driving device 100) moves to the outer peripheral side, and the recording position of the recording track 232 having a reverse spiral relationship with the recording track 222 is set to the inner position. It can be understood that the recording position is moved to the circumferential side.

As described above, the optical disc 200 is
20 has a structure in which recording is performed outward from the inner peripheral side, and the intermediate section 230 is recorded inward from the outer peripheral side. Therefore, there is an advantage that recording areas are completely distinguished and independent address numbers can be assigned. The track direction of the outer peripheral portion 280 may be the same as that of the inner peripheral portion 220 or the intermediate portion 230. However, in order to expect a reproduction operation consistent with the ROM region 230, a track spiral in the same direction as the ROM region 230 is required. Is convenient. In the optical disc 200 of the present embodiment, the inner peripheral part 220 and the outer peripheral part 280 are allocated to a write-once type recording area (RAM area), and the intermediate part 230 is allocated to a reproduction-only (that is, non-rewritable) area (ROM area). The RAM area stores authentication data described later. The write-once type recording area functions as a read-only area once data is recorded.
This does not prevent the M area 230 from being a write-once type recording area. Further, the present invention does not prevent any one of the inner peripheral portion 220 and the outer peripheral portion 280 from being a rewritable recording area. However, in order to enhance the effect of preventing tampering, both areas are write-once type recording areas. It would be preferable.

The RAM area 280 is arranged opposite to the RAM area 220 with respect to the ROM area 230. With this configuration, the user can store the optical disk 200 between the RAM area 220 where the RAM area 280 does not exist and the ROM area 2.
It is highly probable that the optical disk is a partial ROM type optical disk composed of 30 optical disks. Therefore, when the RAM area 280 is being driven, the user is given an impression as if the ROM area 230 is being driven.
The risk that data stored in 0 is copied is reduced.

In the present invention, the intermediate section 230 as a ROM area is used.
The present invention can also be applied to an optical disk in which a continuous address is allocated by forming the spiral track and the inner peripheral portion 220 as a RAM area. However, in such an optical disc, since the address of the RAM area changes according to the length of the ROM data, the address of the RAM area must be calculated while calculating the length of the ROM data in controlling the recording operation. In addition, the management area of the disk including the replacement information and the like cannot be determined inconveniently, and the recording / reproducing operation becomes unstable. On the other hand, since the RAM area 220 and the ROM area 230 are created and addressed independently, the position of the RAM area 220 is fixed independently of the ROM area 230, and stable replacement management and the like can be executed. Thus, the recording / reproducing operation is stabilized.

The RAM areas 220 and 280 are for data recording by the user, and the ROM area 230 is for the optical disc 20.
0 is configured to record data.

Drive device 10 stored in ROM area 230
The data desired by 0 includes, for example, various software (for example, document creation, game, image, sound, business, learning, and utility).

The RAM areas 220 and 280 store authentication data for authenticating the optical disc 200.
That is, the RAM area 220 may store authentication data in order to increase the security level.
The case where the authentication data is not stored in the area 220 is also included. In the present embodiment, the RAM area 220 stores data other than the authentication data as described later.
80 stores only authentication data. With this, RAM
The data capacity of the area 280 can be reduced, which is effective in hiding its existence from the user.

Although the authentication data includes an identifier unique to the optical disc 200, the authentication data stored in each of the RAM areas 220 and 280 may store an identifier unique to the same optical disc 200, respectively. Data that is combined to form one identifier may be stored.

As a part of the authentication data (or as property information different from the authentication data), the properties of the data in the ROM area 230 (an identifier unique to the data, a title, a file type, a manufacturing date, other manufacturing information, Version information, data capacity, number of reproducible times, expiration date, number of reproducible driving devices, etc.
Alternatively, it is recorded in the RAM areas 220 and 280. RAM
The area 220 can also store a result (game result or the like) obtained when the information in the ROM area 230 is reproduced, an upgraded version of the information, and the like. The RAM area 220 (or the ROM area 230) can also store merchandise advertisement information of the optical disk 200 (and / or the software stored therein) manufacturer.

Further, the RAM area 220 (or ROM
The area 230) stores management information of the optical disc 200. The management information is information that cannot be accessed by the user, and stores information such as the recording / reproducing method of the entire disc, the position of the data area (for example, replacement information), and other management information (for example, security data).

As an example of the configuration of the optical disk, for example, the reproduction control layer 250 is made of a material whose temperature changes and changes its state when irradiated with light or other energy.
In the present embodiment, in the initial state, the reproduction control layer 250
It is in a reproduction allowable state in which data recorded in the ROM area 230 can be reproduced (that is, read), and when light of a predetermined power is irradiated, the data recorded in the ROM area 230 cannot be reproduced. Changes to the playback prohibited state. That is, when light is irradiated at a predetermined position on the optical disc 200 with a power sufficient to cause a change in the state of the reproduction control layer 250, the reproduction control layer 250 changes to a reproduction prohibited state, and reading of information corresponding to the predetermined position becomes impossible. become.

For the reproduction control layer 250, for example, a material which causes a physical or chemical change, preferably an irreversible change, by a laser beam is used. Such materials include:
For example, cyanine dyes, squarylium dyes, polymethine dyes such as azurenium dyes, macrocyclic azaannelene dyes such as phthalocyanine dyes, organic substances that are degraded by light irradiation such as dithiol dyes, or amorphous-crystalline Examples include a phase change film or a low melting point alloy such as a tin / silver / copper alloy. In addition, such a material may include one or more of these organic and inorganic materials. The optical disk 200 has an organic dye layer necessary for the recording operation of the RAM areas 220 and 280.
When it is also formed on the M area 230, it has a feature that it is actively used as the reproduction control layer 250 of the ROM area 230.

For example, when the inner peripheral portion 220 and the outer peripheral portion 280 are DVD-RW, an outer diameter of 120 mm, an inner diameter of 40 mm, and a thickness of 0 are formed in a DVD-RW format such as a lead-in data, an address, and a groove for track servo. .6mm disc-shaped polycarbonate resin (PC
The substrate 202 is formed. Next, the PC board 20
The signal surface of No. 2 has a diameter from 40 mm to a diameter of 1
Up to 20 mm, a transparent dielectric layer (not shown), a phase change recording layer (reproduction control layer 250), a transparent dielectric layer (not shown), A
A recording film is formed by sequentially laminating 1-alloy-based reflective layers (not shown). Thus, the reproduction control layer 250 of the present embodiment functions as a reproduction control layer for the ROM area 230, but functions as a phase change recording layer for the RAM area. The reproduction control layer (or phase change recording layer) is RO
Since it is used for the M area 230 and all of the RAM areas 220 and 280, it can be stacked on the entire surface of the substrate 202, which is convenient in manufacturing and excellent in effective use of resources.

Next, an ultraviolet curable (hereinafter abbreviated as UV) protective resin is applied on the reflective layer by spin coating at a thickness of about 10 μm, and cured by irradiation with ultraviolet light.
A UV protection film layer is formed. In addition, the diameter from 80 mm to 118 mm is masked at the time of sputtering, and
0 is formed.

The inner peripheral part 220 and the outer peripheral part 280 are
In the case of R, an outer diameter of 120 mm, an inner diameter of 10 mm, and a thickness of 0.6 mm in which the DVD-R format of the lead-in data, the user data recording area, and the lead-out data are formed.
Is molded. Next, the PC board 202
A dye solution is applied to the signal surface of the substrate by a spin coating method, and gold (Au) having a diameter of 40 to 120 mm is formed on the dried recording layer (reproduction control layer 250) by a sputtering method.
A recording film is formed by sequentially laminating a reflective layer (not shown). Next, a UV protective resin is applied on the reflective layer to a thickness of about 10 μm by a spin coating method and cured by irradiation with ultraviolet rays to form a UV protective film layer. Note that the diameter from 80 mm to 118 mm is masked at the time of spin coating to form an outer peripheral portion described later. Similarly in this example, the reproduction control layer 250 functions as a reproduction control layer for the ROM area 230, and the RAM areas 220 and 2
80 functions as a write-once type recording layer.

The inner peripheral portion 220 and the outer peripheral portion 280 are
When a RAM is used, the outer diameter is 120 mm, the inner diameter is 10 mm, and the thickness is 0.6 in which a DVD-RAM format such as a lead-in data, an address, a groove for track servo, etc.
A disk-shaped PC substrate 202 having a thickness of 2 mm is formed. Then
40 m diameter by sputtering on the signal surface of PC board 202
a transparent dielectric layer (not shown) from m to 120 mm in diameter,
A recording film is formed by sequentially laminating a phase change recording layer (reproduction control layer 250), a transparent dielectric layer (not shown), and an Al alloy-based reflection layer (not shown). Thereafter, a UV protection resin is applied on the reflection layer by spin coating at a thickness of about 10 μm, and cured by irradiation with ultraviolet rays to form a UV protection film layer (not shown). In addition, the diameter from 80 mm to 118 mm is masked at the time of sputtering to form an outer peripheral portion described later. Of course, the inner peripheral portion 220 and the outer peripheral portion 280 may have a structure such as a CD-R or a CD-RW.
Similarly in this example, the reproduction control layer 250 stores the ROM area 23
0 functions as a reproduction control layer and the RAM area 22
For 0 and 280, it functions as a write-once type recording layer.

When the intermediate portion 230 is a DVD-ROM, the DVD-ROM format of the lead-in data, the user data area, and the lead-out data is formed on the outer peripheral portion having any of the above inner peripheral portions. Next, the reproduction control layer 25 already formed on the signal surface of the PC board 202 is formed.
0, the diameter is reduced from 82 mm to 1 by the sputtering method.
Al reflective layer (not shown) up to 18 mm with a reflectivity of 45%
The layers are laminated so as to be in the range of 50% to 50%. Thereafter, a UV protective resin is applied on the reflective layer with a thickness of about 10 μm by a spin coating method, and cured by irradiation with ultraviolet light.
A UV protection film layer (not shown) is formed. Of course, the intermediate section 230 may be a music CD, CD-ROM, DVD video, or the like.

It is sufficient that recording areas having widely different structures are allocated to the inner peripheral section 220 and the intermediate section 230, respectively.
The recording area having a different structure can be arbitrarily selected from the group consisting of a CD-R, a DVD-R, a music CD, a CD-ROM, a DVD-ROM, and a DVD video, but is not limited thereto. In the embodiment, a recordable recording area is allocated to the inner peripheral portion 220 and the outer peripheral portion 280.

Any combination of these can be mixed as an advantage of a different recording area.
It is also possible to perform recording in the DVD-ROM format as 0 and perform CD-R recording as the RAM areas 220 and 280. Since the format recorded in the intermediate unit 230 is different from the format of the inner peripheral unit 220,
It should be noted that the CD or DVD system is not a format compatible with the arrangement of the lead-in section. This is because it is necessary to set the start position on the outer periphery for various formats for which the start position is specified. However, in the case of recording and ROM in consideration of these points, by executing mastering, it is possible to create a shared disk by adding unique addresses even when the RAM areas 220 and 280 and the ROM area 230 are mixed.

DVD-R, DVD-RW, DVD-RA
When the M and DVD-ROM are combined, the format and the modulation / demodulation method are common, so that there is little change to the conventional platform (drive). In particular, the inner peripheral portion 22
When 0 is set in the RAM area, it is possible to provide a configuration that enables recording by a conventional drive.

The buffer area 240 is composed of the RAM area 220 and the R
The recording tracks 222 and 232 which are provided at the boundary of the OM area 230 and have different spiral directions are closed here.
The buffer area 240 is set in a range sufficient to prevent the occurrence of crosstalk, and is preferably set to at least twice the larger of the track pitch of both recording areas.

The buffer area 240 is an area that cannot be defined for use, and is desirably a mirror section on which nothing is recorded.
Even if the recording tracks 222 and 232 intersect, that area cannot be used. Therefore, the configuration other than the mirror portion also functions as the buffer region 240.

It is possible to form the recording tracks 222 and 232 up to just before the mirror surface by using the non-recordable area as a mirror surface, but in this case, it is necessary to accurately position the head. Therefore, by forming an unrecordable area by crossing both tracks, manufacturing becomes easy.

The optical disc 200 of this embodiment has the advantage that the same drive as that of the conventional drive can be performed because the rotation direction of the spindle motor of the drive is constant.

Alternatively, by reversing the rotation of the spindle motor of the drive, the track arrangement on the surface of the disk 200 can be simplified. in this case,
The recording area has spiral recording tracks in the same direction from the inner periphery to the outer periphery, but when recording on the outer periphery, the recording direction is reversed from the outer periphery to the inner periphery by rotating in the reverse direction. In other words, even if the spiral is the same, the same recording as that performed by the reverse spiral is performed by rotating the outer periphery in the reverse direction. FIG. 5 shows a schematic plan view of such an optical disk. In FIG. 5, the same reference numerals as in FIG. 3 with the uppercase letters added correspond to the reference numerals without the alphabet, and thus redundant description will be omitted. Here, the recording track 222A and the recording track 232 are used.
A is the same spiral direction. Even in the same direction spiral, the buffer address 240A exists because the recording address is provided from the outer peripheral side in the intermediate portion 230A.

Although the optical disc 200A shown in FIG. 5 also has a reproduction control layer, a cross-sectional view of the optical disc 200A is shown in FIG.
The illustration is omitted because it is the same as. That is, the optical disk 2
00A, the reproduction control layer 250 is
0 functions as a reproduction control layer and the RAM area 22
For 0 and 280, it functions as a write-once type recording layer.

Reversing the spindle motor as in the optical disk 200A is performed by using the ROM area and the RA on the same surface.
It can be easily identified so as not to be mixed with the M area. Each time the operation of the drive is switched between the RAM mode and the ROM mode, the rotation direction of the spindle motor is reversed. Since the ROM area is rarely accessed at all times, when the access is not made, the sleep mode may be entered and the spindle motor may stop rotating to save power. When the access to the ROM area and the access to the RAM area are temporally separated in this manner, the addition of the address number of the RAM area and the addition of the address number of the ROM area can be performed independently of each other. Compatibility as a reproduction system is improved. When the spindle motor is reversed, the address numbers are added from the outer peripheral side on the outer peripheral side, and the address numbers can be increased toward the inner peripheral side. This is exactly the same as the reproduction of the ROM disk recorded from the inner side in the related art, except that the start position and the spindle motor are rotated in the direction opposite to that of the conventional ROM. on the other hand,
In the RAM area, for example, a lead-in area and a data recording area are constructed from the inner periphery as in the recording of a CD-R. This is exactly the same as a normal CD-R, and can be applied to a conventional additional recording system such as multi-session. The recording at this time can be handled in exactly the same manner as the normal CD-R platform.

The present invention uses the ROM area 230 and the RAM area 2
Although the arrangement of 20 does not preclude reversal, R
If the AM areas 220 and 280 are arranged opposite to each other with respect to the ROM area 230, the effect that the user does not understand the existence of the RAM area 280 will be greater. In addition,
When the arrangement of the ROM area 230 and the RAM area 220 is reversed, the ROM area has a normal prescribed format configuration, and the RAM records data from the outer peripheral side. RO
The boundary between the M area and the RAM area is determined by the amount of data recorded in the ROM area, and the area up to the point where the recording area extending from the inner circumference and the recording area extending from the outer circumference come into contact is used as the recording area.

Also, referring to FIG.
0 may be replaced by the optical disc 200B. The optical disc 200B has a configuration in which copying can be easily determined.
Here, FIG. 6 is a schematic sectional view of the optical disc 200B. FIG. 7 is a logical structure diagram showing marks on the optical disc 200B. The optical disc 200B typically has the same configuration as the optical disc 200, and a description of the same portions will be omitted. The optical disc 200B further includes a groove area 2 on the outer peripheral side of the hatched lead-in area.
The optical disc 200 differs from the optical disc 200 in that the optical disc 200 has 60. The area 260 is located outside the lead-in area, and cannot be accessed by the normal head 110. The region 260 may be provided on either or both of the inner and outer peripheries, and FIG. 6 shows a case where it is provided on both. Therefore, if a mark (also referred to as a pit or a pre-pit) is recorded in the groove area 260, it becomes difficult to read the mark with a normal driving device. This corresponds to the area 280 on the optical disc 200. Therefore, information recorded in such an area is not easily reproduced.

The mark recorded on the optical disc 200B may be formed like a mark 270 shown in FIG. The mark 270 is the longest mark among the marks to be recorded.
And / or the end portion 274 is formed wider than the width of the center portion 276 of the mark. In FIG. 7, the end 272 and the end 2
74 are both wide, and the normal mark shape is indicated by a dotted line. Such a mark 270 operates similarly to a normal mark in a normal driving device. However, the signal shown in FIG. 8 can be obtained by performing specific detection, for example, tangential push-pull signal detection. Here, FIG. 8 is a waveform diagram when the mark 270 shown in FIG. 7 is detected.

The mark 270 has an end 272 and an end 274.
Is particularly protruding from the normal mark. This is because the end 272 and the end 274 of the mark 270 are formed wide. Therefore, for example, by connecting a circuit such as a comparator to the detector and setting the maximum value (or a slightly higher value) of the waveform of the normal mark of the mark 270 as a threshold value, the mark 270 can be easily detected. be able to. The mark 270 is created when the disc is formed, and is an original mark of the optical disc 200B. Therefore, even if the user simply copies only the reproduced signal for the purpose of forgery, the authenticity of the disc can be confirmed by the above-described detector. In addition,
The mark 270 is modulated not only by the above-described usage but also by the presence or absence of the specificity of the mark shape, for example,
It may be used as a management code.

[0053]

Embodiments of the present invention will be described below. In this embodiment, an optical disc in which the reproduction control layer is made of a cyanine dye and a deterioration inhibitor is manufactured, and after confirming whether data can be read by the driving device 100, the reproduction control layer in only an arbitrary region is altered with a high power laser. Then, it was confirmed whether re-reading was possible. Further, a recording area was provided on the same medium, and recording with a laser was attempted. Furthermore, it was confirmed whether the effect of the erasure is continued even after the accelerated environment test.

[0054]

Example 1 A polycarbonate resin was injection-molded to form a format pattern and a diameter of 15 m at the center.
A transparent substrate 310 on a disk having a diameter of 120 mm and a center hole of m was prepared. The outline of the planar structure of the obtained substrate 310 was the same as that in FIG. Radius 50mm to 56
For example, in the case of a CD, a pit string (format pattern) 312 of the EFM signal is formed over mm. In the case of a DVD, an 8/16 modulation code pattern is used. The pit row 312 is formed in a concentric spiral or concentric shape with the center hole. Further, the pit string 312 may be wobbled, so that the address of the sector, the reference clock, and the information of the medium type can be detected from the wobble.

A guide groove 314 (not shown) for allowing a recording laser beam to follow the inner peripheral portion was formed in a spiral or concentric shape concentric with the center hole. The guide groove 314 may also be a wobble groove, so that various kinds of information can be detected from the wobble groove. In this embodiment, a wobble groove is employed. Also, the guide groove 314
The pit row 312 may be formed at different depths.

Next, a reproduction control layer 320 was formed on the polycarbonate substrate 310. 19 parts by weight of a cyanine dye represented by the following chemical formula 1 and 1 part by weight of a deterioration inhibitor given by the following chemical formula 2 were mixed with a high-temperature 4-hydroxy-4-
It was dissolved in 980 parts by weight of a mixed solvent of methyl-2-pentanone and 1,1,5-octafluoro-1-pentanol. The obtained solution was filtered with a 0.45 μm filter. The filtrate was applied on the polycarbonate substrate 310 by a spin coating method to form a dye layer (the deepest part of the pit) having a thickness of 110 nm. After drying the coated pigment in a high-temperature environment, Ag was deposited on the pigment using a sputtering device.
An intermediate layer 330 made of a / Au alloy was formed to a thickness of 50 nm. After forming the intermediate layer 330, the dye attached to the substrate 310 is washed with alcohol, and finally, an ultraviolet curable resin is applied by screen printing to form a protective layer 3 having a thickness of 10 μm.
40 were formed.

FIG. 9 shows a partial cross-sectional view of the optical disk 300 thus obtained. As shown in FIG.
00 is the reproduction control layer 3 on the polycarbonate substrate 310.
20 and an intermediate layer 330 made of an Ag / Au alloy and a UV curable resin protective layer 340 are sequentially laminated.

[0058]

Embedded image

[0059]

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[0060]

Embodiment 2 In Embodiment 2, unlike Embodiment 1, the processes after the sputtering step are eliminated, and a partial ROM type optical disk 300A having a laminated structure of only the polycarbonate substrate 310 and the reproduction control layer 320 is manufactured. did. Otherwise, the same materials and methods as in Example 1 were used.
An optical disc 300A having a structure shown in FIG.

[0061]

Third Embodiment In the third embodiment, in addition to the second embodiment, a protection layer 340 made of a hydrophilic polymer is provided on the reproduction control layer 320, and a partial ROM composed of the polycarbonate substrate 310, the reproduction control layer 320, and the protection layer 340 is provided. The optical disk 300B of the mold was manufactured. The lamination method is applied on the substrate 310 by using a spin coating method to form the reproduction control layer 320,
After drying in a high-temperature environment, polyvinyl alcohol to which 2% of a crosslinking agent was added was spin-coated and dried. Then, by irradiating with ultraviolet rays, the protective layer 340 made of a hydrophilic polymer was crystallized and changed in water resistance and moisture resistance. Otherwise, the optical disk 300B as shown in FIG. 11 was obtained by using the same material and method as in Example 2.

[0062]

Fourth Embodiment In the fourth embodiment, in addition to the third embodiment, an intermediate layer 350 of a thin film made of an inorganic material is provided between the polycarbonate substrate 310 and the reproduction control layer 320. A partial ROM type optical disk 300C including the layer 320 and the protective layer 340 was manufactured. In this embodiment, Au is deposited on the polycarbonate substrate 310 by using a sputtering apparatus.
Was formed to a thickness of 10 nm. Otherwise, the same material and method as in Example 3 were used.
Optical disk 300C shown in FIG.

Comparative Example 1 An intermediate layer 330 made of an Ag / Au alloy was formed with a thickness of 50 nm on a polycarbonate substrate 310 produced in the same manner as in Example 1 by using a sputtering apparatus without applying a dye. An ultraviolet curable resin is applied on the intermediate layer 330 by screen printing, and the film thickness is 10 μm.
Was formed. As shown in FIG. 13, the optical disc 10 thus obtained has a structure in which an intermediate layer 330 made of an Ag / Au alloy and an ultraviolet curable resin protective layer 340 are sequentially laminated on a polycarbonate substrate 310.

The optical discs obtained in the above Examples 1 to 4 and Comparative Example 1 were used with an optical information medium measuring instrument OMS2 manufactured by Nakamichi.
000 m / sec and a signal recorded in the ROM section was read at a wavelength of 783 nm, an aperture NA of 0.55, and an output of 1.0 mW using a semiconductor laser. As a result of the measurement, the error rates of the optical disks of Examples 1 to 4 and Comparative Example 1 were 0.1% or less. Next, using the same measuring device, the ROM portion having a linear speed of 9.6 m / sec was rotated, and a ROM having a radius of 30 mm to 35 mm was randomly irradiated with a 12.0 mW output pulse along the pit row 312 to reproduce the read control layer. 320 was changed to the reproduction prohibited state.

After that, the irradiated ROM signal was read again with the laser power of 1.0 mW output. As a result, in the optical discs 300 to 300C of Examples 1 to 4 according to the present invention, the signals in the area irradiated with the high power laser could not be reproduced, but the reproduced signals in the range other than the irradiation did not change at all. Was. Also,
The reproduction signal of the optical information medium according to Comparative Example 1 showed almost no change over the entire area of the medium from that before laser irradiation.

Next, the optical record carrier obtained in each of Examples 1 to 4 and Comparative Example 1 was rotated at a linear velocity of 9.6 m / sec by using the same measuring instrument in a pit row having a radius of 50 mm to 56 mm. An EFM signal was recorded at a laser power of 12.0 mW. The signal of each optical disk on which the signal was recorded
The data was read by a reproducing machine using a semiconductor laser having a diameter of 88 nm, an aperture of NA = 0.45 and an output value of 0.4 mW, and the jitter value was measured by a jitter meter. As a result, Examples 1 to
Each of the optical disks 300 to 300C of No. 4 had a jitter value of 10% or less and an error rate of 0.1% or less. From these results, the optical discs 300 to 300C
It has been revealed that the recording medium also has excellent recording / reproducing characteristics.

Further, these optical discs 300 to 30
After the 0C was allowed to stand in a constant-humidity and constant-temperature bath at a temperature of 60 ° C. and a humidity of 90% RH for 1000 hours, the reading was performed again. As a result, the reproduced signal characteristics of each medium were almost the same as before the accelerated environment test.

The driving device 100 is, as shown in FIG.
Head 110, CPU 120, memory 130, signal processing circuit 140, drive unit 150, drive control unit 16
0 and an interface section 170, and detachably house optical disks 200, 300, and the like. here,
The optical disc 200 will be described as an example. FIG. 14 is a schematic block diagram of the driving device 100.

The CPU 120 includes a wide range of processing devices of any name, such as an MPU, and executes the driving method of the present invention, and controls the operation of each part of the driving device 100. The memory 130 temporarily stores information read out from the optical disc 200 by the head 110 and a necessary control program, such as a non-volatile memory such as a ROM for storing an operation program of the driving method of the present invention, other programs and data, and the like. And a volatile memory such as a RAM. The signal processing circuit 140 processes a signal recorded on the optical disc 200 by the head 110 and a signal reproduced from the optical disc 200.
The drive unit 150 includes a spindle motor for rotating the disk 200, a drive mechanism for driving the head, and other drive systems, and is controlled (for example, motor rotation control) by the drive control unit 160. The interface unit 170
The driving device 100 is connected to an external device such as a personal computer as a host device. In addition, since any configuration known in the art can be applied to each component, a detailed structure of each part is omitted here.

The driving method according to the present invention will be described with reference to FIG. Here, FIG. 1 is a flowchart illustrating the driving method of the present invention. A program for executing such a driving method can be distributed via a computer-readable medium such as a floppy disk, or distributed via a network such as the Internet.

When the driving operation is started, the CPU 120
The authentication data is read by accessing the RAM area 220 of the optical disc 200 (step 1002).
The head 110 is controlled so as to access the AM area 280 and read out the authentication data (step 1004).
As described above, in the present embodiment, the CPU 120 reads the authentication data in the order of the RAM area 220 and the RAM area 280.

Alternatively, the authentication data can be read (or accessed) in the order of the RAM area 280, the ROM area 230, and the RAM area 220. When the head 110 moves in this manner, the user recognizes access to the RAM area 280 in the same manner as access to the ROM area 230. In this case, when accessing the ROM area 230, there is an advantage that camouflage can be performed by reading specific data.

Step 1002 may be omitted. That is, the CPU 120 can authenticate the optical disc 200 based on the authentication data stored in the RAM area 280. However, it is preferable to provide step 1002 because the security level in this case is lower than the case where step 1002 is provided.

As described above, the RAM areas 220 and 2
Reference numerals 80 each store authentication data including information on an identifier unique to the optical disc 200. CPU 120
Determines whether the optical disc 200 can be authenticated based on the two pieces of authentication data (step 1006). For example, if the two pieces of authentication data are both unique identifiers of the optical disc 200, the CPU 120 determines in step 1006 whether the two pieces of authentication data match. Also, for example, when two authentication data are combined, one optical disc 2
If a unique identifier is represented at 00, CPU 120 will determine whether the two authentication data contain the desired number of digits or symbols. In step 1006, the CPU
If it is determined that the optical disk 200 can be authenticated, the process proceeds to step 1008, and if it is determined that the optical disk 200 cannot be authenticated, the process proceeds to step 1012. Step 1
012 may be omitted.

In step 1012, a drive prohibition notification is given to the user by means of images, sounds, music, characters, etc. (and preferably the reason) that the ROM area 230 cannot be driven.
Notice. This allows the user to use the optical disc 20
It is possible to know that 0 is a pirated version. More preferably, together with this, the driving device 100 can perform a product advertisement of the manufacturer of the optical disc 200 to prompt the user to purchase a regular product, a substitute product, and a new product.

At step 1008, the CPU 120
Acquires management information from the RAM area 220 (step 1008). Next, the driving device 100 reads the ROM area 2
Then, the desired data is reproduced and / or the data is recorded in the RAM area 220 or the data is reproduced (step 1010). That is, when the head 110 is on the ROM area 230, the CPU 120
0 permits reproduction, and when it is on the RAM area 220, the head 110 permits recording and reproduction. ROM area 230
However, for example, game software is stored in the RAM area 22
For example, when storing the intermediate result in the ROM area 23,
In some cases, reproduction of 0 and recording / reproduction in the RAM area are both performed.

After the completion of steps 1010 and 1012, the flow shifts to step 1014 to end the operation (step 1010). When the CPU 120 determines that the optical disk 200 cannot be authenticated, the reproduction of the data in the ROM area 230 is stopped. This makes it possible to prevent the data in the ROM area 230 from being reproduced (leaked).

The authentication data further includes reproduction conditions (for example, expiration date and number of reproductions) of each data stored in the optical disc 200. In steps 1002 and 1004, the driving device 100 recognizes the reproduction conditions of the data. It is preferable that step 1010 further includes a step of determining whether each of the driven data can be reproduced, and a step of determining reproduction of the data based on a result of the determination step. For example, if the CPU 120 determines that the data stored in the ROM area 230 has expired, the CPU 120 proceeds to step 1012 and notifies the user to that effect, performs necessary advertising, and then executes step 1010. To end the operation.

Note that step 10 after step 1012
Instead of 10, if the CPU 420 determines that there is information to be prohibited from being reproduced, the CPU 420 may irradiate the reproduction control layer 250 at a position corresponding to the data in the ROM area 230 with light to change to the reproduction prohibited state. . In order to prohibit reproduction of the ROM area, pulse light irradiation was performed at a laser output of 12 mW by rotating the disk at a linear velocity of 9.6 m / s using an optical head having a laser wavelength of 783 nm and a lens aperture ratio of 0.55. The pulse pattern has a size of 0.5 μm to 2.0 μm as the size of the reproduction prohibited pit on the disk.
A pattern in which marks and spaces are randomly mixed was applied to the ROM section. As a result, random pits were formed in the reproduction-prohibition layer made of the organic dye, and the state was overwritten uncorrelatedly with the ROM consisting of the pre-pits having irregularities on the substrate. The signal reproduced from this part became a random random signal, making it impossible to detect the original ROM signal.

Further, when a high-power reproduction-prohibiting laser beam was irradiated, not only the reproduction-prohibition layer changed, but also the uneven prepits on the substrate were deformed, and the disorder of the reproduction signal was further improved. This makes it impossible to reproduce the data as described in the above embodiment.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and changes can be made without departing from the gist thereof.

[0081]

According to the record carrier and the method for manufacturing the same, and the method and apparatus for driving the record carrier according to the present invention, the third area where the authentication data can be recorded is constituted by a write-once type recording film and is falsified. And the first region is arranged so as to be opposed to the second region so as to be hardly detected from the outside. As a result, authentication of the record carrier can be performed with high security, and reproduction of a pirated copy in which only the first and second areas are illegally copied can be eliminated. In addition, drive control is simpler than a conventional authentication system using a key and encryption. Since the authentication data is, for example, an identifier unique to a conventionally existing record carrier, there is little change in the design at the time of authentication.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating a driving process according to the present invention.

FIG. 2 is a schematic plan view of an optical disc as an example of a record carrier to which the present invention can be applied.

FIG. 3 is a schematic plan view for explaining recording tracks of the optical disc shown in FIG.

4 is a schematic sectional view of the optical disc shown in FIG.

FIG. 5 is a schematic plan view of a modification of the optical disc shown in FIG.

FIG. 6 is a schematic sectional view of a modified example of the optical disk shown in FIG.

FIG. 7 is a logical structure diagram showing marks on the optical disc shown in FIG. 6;

FIG. 8 is a waveform chart when the mark shown in FIG. 7 is detected.

FIG. 9 is a partial schematic cross-sectional view of the optical disc of the first embodiment of the present invention.

FIG. 10 is a partial schematic sectional view of an optical disc according to a second embodiment of the present invention.

FIG. 11 is a partial schematic sectional view of an optical disc according to a third embodiment of the present invention.

FIG. 12 is a partial schematic sectional view of an optical disc according to a fourth embodiment of the present invention.

13 is a partial schematic cross-sectional view of a conventional optical disk as a comparative example with respect to the optical disks shown in FIGS. 9 to 12. FIG.

FIG. 14 is a schematic block diagram of a driving device that executes the driving method of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 drive device 110 head 120 CPU 200 optical disk 220 RAM area 230 ROM area 280 RAM area 300 optical disk

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) G11B 7/30 G11B 7/30 A 20/10 20/10 HF term (reference) 5D029 JB01 JB09 PA01 5D044 AB05 AB07 BC03 BC04 CC06 DE02 DE38 DE49 EF05 FG18 HL08 5D090 AA01 BB02 BB04 BB11 CC14 DD03 DD05 FF09 GG02 HH03 5D121 JJ05

Claims (31)

[Claims] A first area in which desired data is stored in a non-rewritable manner, a second area capable of being recorded, and a second area arranged opposite to the second area with the first area interposed therebetween. A record carrier having a recordable third area. 2. The record carrier according to claim 1, wherein said first area is a read-only area. 3. The record carrier according to claim 1, wherein the third area stores authentication data used to authenticate the record carrier. 4. The record carrier according to claim 3, wherein the authentication data includes an identifier unique to the record carrier. 5. The second area stores first authentication data, and the third area stores second authentication data used to authenticate the record carrier together with the first authentication data. 2. The record carrier according to claim 1, wherein the record carrier is stored. 6. The record carrier according to claim 5, wherein the first and second authentication data include an identifier unique to the record carrier. 7. The record carrier according to claim 1, wherein the third area is an area where additional recording is possible. 8. The record carrier according to claim 1, further comprising a write-once recording film covering said first to third regions. 9. The record carrier has a disk shape, the first area is a read-only area having a spiral first track extending in a first direction, and the second area. 2. The record carrier according to claim 1, further comprising: a spiral second track extending in a second direction opposite to the first direction on the same plane as the first track. 3. 10. A non-recordable area in which information cannot be recorded between the first and second tracks, the non-recordable area intersecting the first and second tracks. 10. The record carrier according to claim 9, which is formed. 11. Between the first and second tracks,
10. The record carrier according to claim 9, further comprising a non-recordable area at least twice as large as the larger of the track pitches of the first and second tracks. 12. The record carrier according to claim 9, wherein the first and second tracks are independently addressed. 13. The record carrier has a disk shape, the first area is a read-only area having a spiral first track, and the second area is the same as the first track. A second track having a spiral shape extending in the same direction as the first track on a surface, and further having a non-recordable area where information cannot be recorded between the first and second tracks. 2. The record carrier according to claim 1, wherein said non-recordable area is formed by intersecting said first and second tracks. 14. A first area for storing desired data in a non-rewritable manner, and a recordable second and third area, wherein the third area is located between the second area and the second area with the first area interposed therebetween. Forming a write-once type recording film on the first and second areas, the method comprising: forming the write-once type recording film on the first and second areas; 15. The method according to claim 14, further comprising the step of storing in the third area authentication data used to authenticate the record carrier. 16. Storing first authentication data in the second area; and storing second authentication data used to authenticate the record carrier together with the first authentication data in the third area. Storing in an area. 17. An authentication system, comprising: a first area for storing desired data in a non-rewritable manner, a second area for recording, and a second area with the first area interposed therebetween. Authenticating the record carrier based on the authentication data of the record carrier having a recordable third area for storing data; and controlling the driving of the first area based on a result of the authentication step. And a driving method. 18. The second area stores first authentication data, the third area stores the authentication data is second authentication data, and the authentication step includes the first and second authentication data. 18. The method according to claim 17, wherein the record carrier is authenticated based on the authentication data. 19. The method of claim 18, further comprising: reading the first authentication data; and reading the second authentication data after the reading step. 20. The method according to claim 20, further comprising: reading the second authentication data; accessing the first area after the reading step; and reading the first authentication data after the accessing step. 19. The method according to 18. 21. The method of claim 17, wherein if the authentication step authenticates the record carrier, the controlling step reproduces the data in the first area. 22. The method according to claim 17, further comprising the step of notifying a user of prohibition of driving the first area if the authentication step does not authenticate the record carrier. 23. The method according to claim 17, further comprising the step of stopping the driving of the first area if the authentication step does not authenticate the record carrier. 24. The method of claim 17, further comprising, if the authentication step does not authenticate the record carrier, providing a user with a commercial promotion of a manufacturer associated with the record carrier. 25. The authentication data further includes a reproduction condition of each data stored in the record carrier, the method comprising: reading the authentication data to determine whether each data of the record carrier can be reproduced. Determining the reproduction of the data based on the result of the determining step. 26. The method according to claim 25, wherein the reproduction condition includes an expiration date of the data. 27. The method according to claim 25, wherein the reproduction condition includes a number of times the data is reproduced. 28. The method according to claim 25, further comprising a step of notifying a user of said reproduction inhibition of said specific data when said judging step judges that reproduction of said specific data is prohibited. . 29. A program for executing the method according to claim 18. Description: 30. A first area for storing desired data in a non-rewritable manner, a second area for recording, and a second area which is located opposite to the second area with the first area interposed therebetween. A drive device for driving a record carrier having a third area for storing data, comprising: an authentication unit for authenticating the record carrier based on the authentication data; and a first unit based on an authentication result of the authentication unit. And a control unit for controlling the driving of the region. 31. The second area stores first authentication data, the third area stores the authentication data is second authentication data, and the authentication unit stores the first and second authentication data.
31. The drive device according to claim 30, wherein the recording medium is authenticated based on the authentication data.