JPH11110826A - Optical information recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate production by producing a first substrate formed with a reproduction only information region and a second substrate formed with a recordable information region in a position corresponding to the side inner than this region and bonding these substrates to each other by an adhesive. SOLUTION: The reproduction only information region 102 consisting of the prepit regions formed by modulating content information, such as music images, text data and numerical data, by an 8-16 modulation system of DVD standards and a reflection film of aluminum, gold, etc., covering this region is formed on the rear surface of the first substrate 101. The recordable information region 104 consisting of a region formed with guide grooves at a DVD-R standard pitch, reflection film of gold, etc., covering the surface of this guide groove region and further a dyestuff film covering the same is formed on the rear surface of the second substrate and the reproduction thereof with a reproduction only DVD reproducing device is made possible. The positions of both regions are so determined that the recordable information region 104 exists on the outer side of the reproduction only information region 102 when viewed from the front surface of the first substrate 101 when the first substrate 102 and the second substrate 103 are bonded to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an optical information recording medium on which information such as music, images, text data, and numerical data is recorded.

[0002]

2. Description of the Related Art Conventional music, images, text data,
A read-only optical disk used for recording numerical data and the like is suitable for mass data distribution, but it has been impossible for a user to later record information on the optical disk itself. Therefore, the information recorded by these users has been stored in the memory medium of the reproducing apparatus. However, when the playback device is different, the information recorded by the user cannot be used.

In order to solve this problem, a recordable optical disk such as a write-once optical disk using an organic dye film or a rewritable optical disk using a phase change film or a magneto-optical film is used as a recording film. A user (provider) pre-records information such as music, images, text data, and numerical data (hereinafter, referred to as “contents information”), and the user records the information in the remaining recordable area later. There is a method.

An information recording medium disclosed in Japanese Patent Application Laid-Open No. 8-287586 has an electronic module (non-volatile memory) having an integrated circuit embedded in a read-only optical disk on which content information is recorded as pre-pits. The user can record information in this nonvolatile memory.

Further, in a single-disc optical disk such as a CD (Compact Disc), a part of the information surface is a read-only information area in which content information is recorded as prepits, and a part is an organic dye film and a phase change film. Single ROM with a recordable information area where users can record information by themselves
・ RAM (Read Only Memory ・ Random Access Memory)
-Type optical disk and DVD (Digital Versatile Disk)
A bonded ROM in which one surface is a read-only information area in which content information is recorded as pre-pits, and the other surface is a recordable information area in which a user can record information by himself, such as a dye film or a phase change film. There is an apparatus in which a user records information in a recordable information area using a RAM type optical disk or the like.

The information recorded by the user in the recordable information area of the optical information recording medium having the above configuration includes, for example, data stored during the course of a game, environment setting of application software, program reproduction information of music information and security data. There is. In particular, in recent years, with the increase in the capacity of optical discs, users can obtain high-quality image information, high-quality audio information, high-performance software, and the like, and it is important to protect the copyright of these content information. It is a problem.

That is, it is possible to prevent a third party who has not received a license from easily reproducing or copying illegally the content information recorded on the optical information recording medium, and protect the copyright of the content information. The development of technology for this is desired.

For example, in order to confirm that the user has been registered as a legitimate user, a previously registered user registration code is input from a keyboard of a PC (Personal Computer) or the like and recorded in an information area of an optical disk to be reproduced. There is a protection method in which the content information can be reproduced only when the user registration code is referred to from the provided content information. Also, the content information recorded in the information area of the optical disc is scrambled and recorded, and the content information recorded in the information area can be reproduced only when a legitimate user inputs a descramble key. There is a protection method that can be done.

[0009]

However, the method of pre-recording content information on the recordable optical disc has a problem that it is not suitable for mass production.

[0010] Further, the optical disk in which the nonvolatile memory is embedded has a problem that a playback module for playing back information recorded in the nonvolatile memory must be installed on the playback device side. In other words, there is a problem that it cannot be reproduced by an optical disk drive installed in a normal PC or the like. In addition, there is a problem in that the shape of the optical disk must be changed from a conventional shape to embed the nonvolatile memory, and a process for embedding the nonvolatile memory is required, and manufacturing is difficult.

In addition, the single-chip ROM / RAM type optical disk has a problem that it is difficult to manufacture since a read-only information area and a recordable information area must be formed on the same surface of the optical disk. For example, when a dye film is used in the recordable information area, when the dye solution is applied to the substrate, there is a problem that the dye solution is erroneously applied to the read-only information area or the dye droplets adhere. , Difficult to manufacture. When a phase-change film is used for the recordable information area, a mask having a precise shape covering the read-only information area is created so that the phase-change film is not formed in the read-only information area. There was a problem that a film had to be formed. Although some optical disks have a configuration in which a recording film is formed in the read-only information area, there is a problem that the cost is extremely high.

Further, in the bonded ROM / RAM type optical disk, there is a problem that two surfaces cannot be reproduced from the same direction. Therefore, a two-optical pickup type reproducing apparatus in which optical pickups are respectively installed on both sides of the optical disk. Unless is used, there is a problem that it is not possible to access between the reproduction-only information area and the recordable information area during reproduction.

[0013]

In order to solve the above-mentioned problems, the invention according to claim 1 of the present application provides a first substrate having a read-only information area on one side and a recordable information area on one side. 2 substrate and an adhesive layer, and the surface of the first substrate having the read-only information area and the surface of the second substrate having the recordable information area face each other via the adhesive layer. The recordable information area is attached outside and / or from the outermost peripheral position of the read-only information area.
Alternatively, it is formed inside the position of the innermost periphery of the reproduction-only information area.

According to a second aspect of the present invention, in the optical information recording medium according to the first aspect, a signal is recorded in the recordable information area and the read-only information area in the same data format. It is assumed that.

According to a third aspect of the present invention, in the optical information recording medium according to the first or second aspect, information is recorded in the read-only information area, and the information is reproduced in the recordable area. Security data is recorded.

According to a fourth aspect of the present invention, in the optical information recording medium according to the first to third aspects, demo data of information recorded in the read-only information area is further recorded in the read-only area. It is characterized by the following.

According to the optical information recording medium of the present invention, the read-only information area and the recordable information area are formed on different substrates, and the area outside the outermost peripheral position of the read-only information area and / or the read-only area. A recordable information area is formed inside the innermost position of the dedicated information area. Therefore, the first substrate on which the read-only information area is formed and the second substrate on which the recordable information area is formed can be manufactured separately, and the respective substrates can be bonded with an adhesive layer. can do. In addition, since both the read-only information area and the recordable information area can be reproduced by one optical pickup from the same surface of the optical disc, access between the two information areas can be easily performed.

In the optical information recording medium according to the present invention, the data format of the recordable information area and the data format of the read-only information area are the same, so that the existing DVD reproducing apparatus and DVD-R
Data recorded in the recordable information area can also be reproduced by a reproduction-only device such as an OM reproduction device.

According to the optical information recording medium of the present invention, the security data for reproducing the information recorded in the read-only information area is recorded in the recordable information area. The data can be reproduced even on a PC on which no data is recorded.

According to the optical information recording medium of the present invention, demo data that can be reproduced without security data is recorded in the read-only information area. A digest version of the recorded information can be viewed.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the optical information recording medium of the present invention will be described below with reference to the drawings. FIG.
FIG. 1 is a diagram showing a cross section of an optical information recording medium according to one embodiment of the present invention. In the figure, 101 is a first substrate, 102 is a read-only information area, 103 is a second substrate, 104 is a recordable information area, 105 is an adhesive layer, and 106 is a center hole. FIG. 2 is a diagram showing a planar structure of an optical information recording medium according to one embodiment of the present invention. In the figure, the same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted. In the following description, the first
The surface of the substrate 101 and the second substrate 103 on the side of the adhesive layer 105 is defined as a back surface, and the surface opposite to the adhesive layer 105 is defined as a front surface.

As shown in FIG. 1, in the optical information recording medium of the present embodiment, a first substrate 101 and a second substrate 103 made of polycarbonate resin, acrylic resin, glass or the like are made of a transparent material such as an ultraviolet curing resin. In this configuration, the components are bonded by an adhesive layer 105 made of an adhesive, a transparent adhesive sheet, or the like. In the optical information recording medium of this embodiment, the thickness of the first substrate 101 and the second substrate 103 is 0.6 mm, the outer diameter is 120 mm, and the inner diameter is 15 mm. However, the thickness, inner diameter, and outer diameter of the first substrate 101 and the second substrate 103 are not limited to these.

On the back surface of the first substrate 101, a read-only information area 102 is formed. In the optical information recording medium of the present embodiment, the read-only information area 102 is formed by modulating content information such as music, images, text data, and numerical data by the 8-16 modulation method defined in the DVD standard. It consists of a region where the pre-pits are formed, and a reflective film of aluminum, gold or the like which covers the region where the pre-pits are formed.

On the back surface of the second substrate 103, a recordable information area 104 is formed. In the optical information recording medium of the present embodiment, the recordable information area 104 is a DVD.
A region in which guide grooves are formed at a pitch specified in -R (Digital Versatile Disc-Recordable) standard, a reflective film such as gold formed on the region in which the guide grooves are formed, and a film covering the reflective film. And a dye film made of an organic dye such as a cyanine dye formed. Since the data format conforming to the DVD-R standard is the same as the data format of a read-only DVD, the recordable information area can be reproduced by a read-only DVD reproducing device.

Here, the recording film material used for the recordable information area 104 is not limited to a dye, but may be a GeTeSb-based or AgSb-based material.
A phase change material such as InTe may be used. in this case,
Data recorded in the recordable information area 104 can be erased.

As shown in FIG. 2, the optical information recording medium of the present embodiment has a structure in which the first substrate 101 and the second substrate 103 are bonded together when viewed from the surface of the first substrate 101.
Recordable information area 10 outside reproduction-only information area 102
4 is formed. For example, the read-only information area 102 formed on the first substrate 101 has a diameter of 4
If it is 5 mm to 95 mm, the recordable information area 104
Is formed in a region outside the diameter of 95 mm.

In the present embodiment, the recordable information area 104 is formed in an area outside the read-only information area 102.
02 may be formed in a region inside. Also,
The recordable information area 104 may be formed both inside and outside the read-only information area 102.

In this embodiment, the recordable information area 1
04 is the same as the outermost position of the read-only information area 102, but when the recordable information area 104 is formed on the second substrate 103, the innermost position of the recordable information area 104 is The read-only information area may be formed from inside the position corresponding to the outermost peripheral position. In this case, when the first substrate 101 and the second substrate 103 are bonded,
An area located outside the outermost peripheral position of the reproduction-only information area 102 is used as the recordable information area 104. Similarly, when the recordable information area 104 is inside the read-only information area 102, when forming the recordable information area 104 on the second substrate 103, the outermost peripheral position of the recordable information area 104 is the read-only information. It may be formed outside the position corresponding to the innermost peripheral position of the region. Also in this case, the first
When the substrate 101 and the second substrate 103 are bonded together, an area located inside the innermost position of the read-only information area 102 is used as the recordable information area 104.

The transparent adhesive layer 105 made of an ultraviolet curable resin, a pressure sensitive adhesive sheet or the like is formed in a thickness of 30 to 80 μm, preferably about 50 μm. By setting such a film thickness, the read-only information area 102 and the recordable information area 104 are arranged from the front side of the first substrate 101.
Can be recorded and reproduced with a single optical pickup.

Next, an embodiment of a method for using the optical information recording medium of the present invention will be described. FIG. 3 is a diagram showing a configuration of data recorded in the read-only information area and the recordable information area of the optical information recording medium according to the first embodiment of the present invention. In the figure, the same parts as those in FIG. 301 is lead-in, 302 is data management information, 3
03 is demo data, 304 is main data, 305 is lead-out, and 306 is security data.

As shown in FIG. 3, the read-only information area 10
2 are lead-in 301, data management information 302, demo data 303 which is a digest version and trial version of main data, and main data which is content information such as music, images, text data, and numerical data. 304 and a lead-out 305. As the data management information 302, a demo data start position, a main data start position, a security data recording start position, and the like are recorded.

In the recordable information area 104, security data 3 necessary for reproducing the main data 304 is stored.
06 is recorded. The security data 306 is
For example, a user registration code, a descrambling key, and the like that can be obtained through the Internet or the like by a user who makes a regular user registration with an optical disk seller or the like. Then, the information is recorded in the recordable information area 104 by a recordable ROM drive or the like installed in a PC or the like.

Next, a procedure for reproducing an optical information recording medium according to an embodiment of the present invention will be described. FIG. 4 is a flowchart showing a reproduction procedure of the optical information recording medium according to the first embodiment of the present invention. S1 is the start of the playback procedure. First, a reproducing device (not shown) (not shown) may reproduce the lead-in 301 and reproduce the data management information 302 (S2). Information such as the recordable information area start position and the security data recording start position recorded as the data management information 302 is read, and the security data 306 is recorded at the address of the recordable information area 104 specified by the security data recording start position. It is confirmed whether or not there is (S3). Here, if a plurality of security data start positions are prepared in advance, a plurality of security data 306 can be recorded. In this case, a plurality of users who have recorded the security data 306 can reproduce the optical disc. .

The security data 306 is read (S
4) If it is confirmed that the security data 306 is recorded, it is determined whether or not the security data 306 is legitimate (S5). If not, the process proceeds to S8 described later. If it is legitimate, the scrambled main data 304 is descrambled or the security data 306 is approved (S
6) The main data 304 is reproduced (S7). Then, the reproduction procedure ends (S9).

If the security data 306 is not recorded, the demo data 303 recorded in the reproduction-only information area 102 is reproduced (S8). By viewing the demo data 303, the user can know the outline of the information recorded in the reproduction-only information area of the optical disc, and can determine whether or not to perform regular user registration. Of course, it is also possible not to record the demo data 303. In this case, the process ends as reproduction is impossible.

[0036]

As described above, according to the optical information recording medium of the present invention, the read-only information area and the recordable information area are formed on different substrates, and the outermost position of the read-only information area is A recordable information area is formed inside the outer area and / or the innermost position of the read-only information area. Therefore, the first substrate on which the read-only information area is formed and the second substrate on which the recordable information area is formed can be manufactured separately, and the respective substrates can be bonded with an adhesive layer. can do.

According to the optical information recording medium of the present invention,
Since both the read-only information area and the recordable information area can be reproduced by one optical pickup from the same surface of the optical disk, access between the two information areas can be easily performed.

According to the optical information recording medium of the present invention,
Since the recordable information area and the read-only information area have the same data format, the existing DVD playback device and DV
Data recorded in the recordable information area can also be reproduced by a reproduction-only device such as a D-ROM reproduction device.

[Brief description of the drawings]

FIG. 1 is a diagram showing a cross section of an optical information recording medium according to one embodiment of the present invention.

FIG. 2 is a diagram showing a plane of an optical information recording medium according to one embodiment of the present invention.

FIG. 3 is a diagram showing a configuration of information data recorded in a read-only information area and a recordable information area of an optical information recording medium according to one embodiment of the present invention.

FIG. 4 is a flowchart showing a reproduction procedure of an optical information recording medium according to one embodiment of the present invention.

[Explanation of symbols]

 101 first substrate 102 read-only information area 103 second substrate 104 recordable information area 105 adhesive layer 106 center hole 301 lead-in 302 data management information 303 demo data 304 main data 305 lead-out 306 security data

Claims (4)

[Claims] A first substrate having a read-only information area on one side; a second substrate having a recordable information area on one side; and an adhesive layer, wherein the read-only information area of the first substrate is provided. And the surface of the second substrate having the recordable information area are bonded to each other via the adhesive layer, and the recordable information area is located outside the outermost periphery of the read-only information area. And / or an optical information recording medium formed inside the position of the innermost periphery of the read-only information area. 2. The optical information recording medium according to claim 1, wherein
An optical information recording medium, wherein signals are recorded in the recordable information area and the read-only information area in the same data format. 3. The optical information recording medium according to claim 1, wherein information is recorded in the read-only information area, and security data for reproducing the information is recorded in the recordable area. An optical information recording medium characterized in that: 4. The optical information recording medium according to claim 1, wherein demo data of information recorded in said read-only information area is further recorded in said read-only area. Information recording medium.