JP2002313068A - Optical information recording medium, stamper, and signal generator - Google Patents

Abstract

(57) [Summary] [PROBLEMS] While using a conventional recording device and reproducing device,
An optical information recording medium having an increased recording capacity without maximizing its capability and violating the standards imposed on the optical information recording medium. SOLUTION: In the case of 78:59:73 frame at the beginning, when one frame is advanced, it becomes 78:59:74 frame, and when further advanced by one frame, the frame information is reset and a carry occurs. The second information also carries a carry, resulting in a 79:00:00 frame. However, the second information becomes a 78:60:00 frame, and the carry of the second information is incremented by one every 80 seconds. Has become. That is, 78
From 79 minutes and 74 frames, 79 minutes 0 when one frame advances
00 seconds and 00 frames. As a result, the recording capacity can be increased even when there are restrictions due to ATIP.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc,
R, CD-RW, DVD-R, DVD-RW, etc., an optical information recording apparatus, a stamper for producing them, and a method for producing these optical information recording media,
The present invention relates to a signal generator suitable for performing reproduction control.

[0002]

2. Description of the Related Art Optical information recording devices such as optical disks, organic dye-based write-once optical disks, phase-change optical disks, and magneto-optical disks have been widely used as data recording media and audio information recording media. CD-R, CD-RW, DVD-R, DVD-RW
Etc. are being used. In these optical information recording apparatuses, marks such as fine pits attached to the surface of a disk-shaped recording medium, or changes in the properties of a film provided on the surface of a disk-shaped recording medium due to optical or magnetic properties. It is used as information and records information by using optical means.

Some of the meanings of the terms relating to the optical information recording apparatus of this type are described in JIS X6261.
"130mm write-once optical disc cartridge", JIS62
71, "130 mm rewritable optical disk cartridge", and the terms described therein are used in the present specification unless otherwise specified.

In these optical information recording devices, meandering grooves and lands are alternately provided in a spiral shape, and information is usually written on the grooves. The grooves and lands are used for position control for causing the photodetector to travel along the zone in which information is written, that is, for position detection for performing tracking.
That is, the intensity of the reflected light differs depending on the position of the groove or the land where the light is irradiated, and the position control device receives the signal, controls the position of the photodetector, and writes the information. Control is performed so that light is accurately applied to the current position.

[0005] Of these optical information recording devices, C
In the DR, CD-RW, and the like, a standard called Orange Book is defined, and according to the standard, the inner circumference of a disc-shaped optical information recording medium (hereinafter, may be simply referred to as a “disk”). From the PCA (Powe
r calibration area), PMA (Program memoryar)
ea) area, a lead-in area, a program area, and a lead-out area are to be provided. The PCA is an area for performing test recording by a recording drive, and the PMA is an area for recording a memory usage state of an optical information recording medium. PMA is RMA (Recording Memory Area) etc.
Sometimes called by another name.

[0006] The lead-in area is an area for recording control information to be given to a recording device, a recording / reproducing device or the like when recording information on the optical information recording medium or reading information from the optical information recording medium. . The program area is used by a user to write and read information, and is an area that can be used by the user. The lead-out area is provided outside the program area, and is used to restore the tracking when the tracking of the photodetector is shifted and runs off the program area.

Meanwhile, a meandering pre-groove is formed on a CD-R or a CD-RW. The pre-groove is wobbled in a meandering manner based on a signal obtained by synthesizing a reference signal having a predetermined frequency and pre-format information. The recording device demodulates the amount of light reflected from the pregroove, and performs recording / reproduction based on the obtained preformat information. This pre-groove is a PCA provided in each area of CD-R and CD-RW.
Area, PMA area, lead-in area, program area,
It is formed continuously in the lead-out area.

It is standardized that the PCA area has a length of about 22 seconds and 40 frames, and the PMA area has a length of about 13 seconds and 25 frames. While ensuring this length, set the CD so that the lead-in area start radius is within the standard.
-R and CD-RW are formed.

The start radius of the lead-in area and the program area start radius are determined at predetermined positions, and the lead-in area start time is determined by a manufacturer identification code (M-code).
However, since it is a code (T-code) indicating the recording method (write strategy), the manufacturer cannot practically arbitrarily change the code. The program area start time is also determined by the standard. The size of the lead-out area is also specified by the standard to be 1 minute 30 seconds or more in terms of recording time.

In such an optical information recording medium,
It is possible to increase the recording density of information by reducing the track pitch as much as possible and decreasing the linear velocity (m / s) used for recording and reproducing information. Recording is preferable. Also, if the program area can be made as large as possible, it is possible to record a large amount of information on the same optical information recording medium.

As a technique corresponding to the former, Japanese Patent Application Laid-Open No. Hei 10-222874 discloses a technique of reducing a track pitch in a program area and increasing a recording linear density (corresponding to a linear velocity). ing.
Generally, the resolution of a photodetector is determined by the wavelength of light used and the numerical aperture (NA) of the optical system. Therefore, in this technique, the wavelength and the numerical aperture (λ = 78) which are generally used are used.
Wavelength shorter than 0 nm, NA = 0.45, and high NA (λ = 635-68)
(5 nm, NA = 0.6) and increasing the resolution to decrease the track pitch and increase the recording linear density (corresponding to the linear velocity), thereby increasing the recording capacity.

[0012]

However, a disk having a simply reduced track pitch or linear velocity has a short wavelength,
When recording is performed using a recording apparatus using a high NA and a small spot size, λ = 780 nm, which is usually used,
There is a problem that reading cannot be performed by a reproducing apparatus having a photodetector with NA = 0.45. That is, there is no compatibility with those conventionally used, and a dedicated playback device must be used. In addition, since the information in the lead-in area cannot be read, it is impossible to identify the type of the disk.

In addition, this method has another problem that comes from the Orange Book standard. That is, when simply reducing the track pitch, it is difficult to keep both the lead-in start radius and the program start radius within the standard.

That is, the disc after recording is reproduced without any problem by the current CD player or CD-ROM drive, and the disc before or after recording is reproduced by the current CD-R.
In order to record with a / RW writer without any problem, since the lead-in start time information represents the manufacturer information and the write strategy information, the lead-in start time information cannot be changed practically, and the time from the start of the lead-in to the start of the program. Cannot be changed because it is defined by the standard. Therefore, if the track pitch is set to a value of 1.5 μm or less in order to increase the recording information density, the lead-in start radius position or the program start radius position will be out of specification.

When trying to record a non-standard disc, the lead-in information may not be reproduced or may not be recorded due to a reading error, a recording error may occur, or data may not be recorded normally. Even if a non-standard disc can be luckily recorded, data may not be read properly or the data may not be read at all when reproducing the non-standard recorded disc.

In the invention described in Japanese Patent Application Laid-Open No. Hei 10-222874, by keeping the track pitch and recording linear density of the lead-in area unchanged, even if a conventional reproducing apparatus is used, the type of disc can be reduced. Make it possible to identify. However, even if the disc type can be identified by this method, information written in a program area by a recording device having a short-wavelength, optical NA pickup cannot be read by a conventional recording device. Is no different.

In the invention described in JP-A-10-222874, as shown in the embodiment,
In the PCA area, the PMA area, the program area, and the lead-out area, the track pitch and the recording linear density are the same, and these are changed only in the lead-in area. This is because the PCA area is an area for trial recording with a recording drive, and the PMA is an area for recording the memory usage status of the optical information recording medium, and therefore, recording and reproduction are performed under the same conditions as the program area. It is based on the notion that it must be done and is inevitable for the invention.

As described above, increasing the recording capacity by performing recording with a recording apparatus using a short wavelength, a high NA, and a small spot size cannot be used by a conventional recording / reproducing apparatus. This causes a problem. As a method of solving such a problem, the present inventors have proposed a method of increasing the recording capacity by reducing the track pitch as much as possible or decreasing the linear velocity as much as possible within the allowable limit of the conventional recording and reproducing apparatus. And invented
No. 00-257003, Japanese Patent Application No. 2000-261337
No., Japanese Patent Application No. 2000-399872, Japanese Patent Application No. 2000-3
Patent Application No. 99873 (hereinafter referred to as "prior application invention").

However, even when the method of the invention of the prior application is adopted, there is a problem that the standard of the disk is not satisfied. That is, according to the Orange Book standard, the maximum length of the program area is 79:59:74.
There is a problem that it is limited to the frame. That is, normally, the start of the program area is 00 minutes 00 seconds 0
According to the Orange Book standard, the start time of the lead-out area (corresponding to the last frame of the program area: last possible start time of read-out area) is 79 frames, 59 seconds, and 74 frames at maximum. Is limited to

This is based on ATIP (Absolute Time in Pre
-groove) has a two-digit time display portion, and the tens place is because information can be written in the lead-in area as a lead-out start time at a maximum of only seven. Therefore, the program area is limited to the maximum of 00:00:00 frame to 79:59:74 frame, that is, 79:59:75 frame, and the capacity of the program area is further increased.
It cannot be lengthened.

Further, even if the overburn method of recording data in a lead-out area not normally used for writing is performed, the record recorded in the ATIP exceeds the lead-out area start time. , It is not possible to know where the recordable end position of the disc is, and data cannot be reliably recorded to the end, or data on the disc itself is destroyed,
If the drive attempts to record outside the disk area, a problem arises in that one or both of the drive and the disk is destroyed.

A CD-R / RW drive capable of accurately performing writing for 99 minutes in response to the overburn is CR-4804TE (trademark) and CR-4805T manufactured by MITSUMI.
E (Trademark) only, and the recording speed is slow because the maximum speed is 8x, and the recording software is also NeroBu
Since there are only about two types of rning (trademark) ROM version 5.0.3.8 and others, the use environment is limited. Also, 96
In the time code of minutes to 99 minutes, double booking of addresses occurs, which is the same as the time code of the PCA, PMA, and lead-in areas. It is difficult to determine whether the drive is reading the time code on the outer circumference or the time code on the inner circumference, which may cause a recording error, a reading error, damage to the disk, or damage to the drive pickup mechanism itself. Sometimes.

The present invention has been made in view of such circumstances, and uses a conventional recording apparatus and reproducing apparatus to maximize its performance, and furthermore, a standard imposed on an optical information recording medium. Provided is an optical information recording medium having an increased recording capacity, a stamper for producing the same, and a signal generator suitable for producing these optical information recording media and performing recording / reproduction control without violating The task is to

[0024]

According to a first aspect of the present invention, there is provided a disk-shaped optical information recording medium for recording and reproducing information by a light beam tracked along a meandering groove or land. In the one having a PCA area, a PMA area, a lead-in area, a program area, and a lead-out area in order from the inner circumference to the outer circumference, at least the pre-recorded time code information existing in the program area is included. , A minute, a second, and a frame, wherein the most significant bit indicating the frame is fixed, and is increased by one second every 76 frames or more. (Claim 1).

According to the standard, the data structure of one frame of the ATIP is as shown in FIG. 1, and the minute, second, and frame are each represented by 7 bits (the highest bit of 8 bits is fixed data). Have been. Then, as shown in FIG. 2, the frame data increases by 1 every time one frame advances, increases by 1 second at 75 frames, and increases by 1 minute at 60 seconds. ATIP corresponding to the program area is 00 minutes 0
It starts at 00 seconds 00 frames and ends up to 79 minutes 59 seconds 74 frames. Therefore, the recording capacity is (80 × 60 × 7
5) It is a frame.

In this means, the correspondence between ATIP data and real frames is changed. That is, in the prior art, the ATIP data is increased by one second every 75 frames, but in the present means, the ATIP data is incremented every N frames having a predetermined number N of 76 or more.
The IP data is increased by one second. Thereby, in relation to the data recorded in the ATIP, (8
(0 × 60 × N) frames of data can be recorded. Therefore, the recording capacity can be increased even when there are restrictions due to ATIP.

In the present invention, the most significant bit indicating the minute,
The most significant bit indicating the second and the most significant bit indicating the frame must be always fixed so that they can be used in the optical disk recording / reproducing apparatus distributed conventionally.

N is 76 when a decimal number is used.
Any of the four types 77, 78 and 79 can be used. Since the maximum value of the second digit of the frame is 7 due to restrictions on the Orange Book, 79 is the maximum. Since A to F can be used in the first digit of the frame, it is also possible to use hexadecimal numbers and set, for example, 7A, 7B, 7C, 7D, 7E, and 7F to the value of N.

That is, in the present means, "increase by one second for every 76 frames or more" means to increase for one second for every number of frames N having a decimal number of 76 frames or more. As an example of a simple method, the number of frames is counted in decimal, and 76, 77, 78, 79
How to increase by 1 second per frame, the number of frames is 1
There is a method of counting by a hexadecimal number and increasing by one second for every 76 or more frames of a decimal number. If a hexadecimal number is used, it can be increased by one second for every 7F frame at maximum. However, since the display device used for the drive may not support hexadecimal numbers, it is preferable to use decimal numbers from the viewpoint of versatility. In this case, the maximum value of N is preferably 79.

Needless to say, since the restrictions resulting from these other current technologies have nothing to do with the technical idea of the present invention, this is the restriction on the upper limit of the value of N in the present means. Not something.

The "pre-recorded time code information" is time code information recorded at the time of manufacturing the optical information recording medium, and is usually recorded by wobbling the groove. I do. In particular, the meandering cycle is changed according to the time code information. This information is used only at the time of writing the information. At the same time as the writing of the information, the address of the frame is used as a part of the information recorded in the frame of the program area as “the time code information recorded in advance. , And the reading is controlled based on the information written in the frame.

According to this means, it is possible to maximize the capacity of a conventional recording apparatus and reproducing apparatus while using it, and to increase the recording capacity without violating the standard imposed on the disc. Optical information recording medium. Further, even if the recording capacity is increased, the time code does not stop responding to the increase.

A second means for solving the above-mentioned problem is as follows.
A disc-shaped optical information recording medium for recording / reproducing information with a light beam tracked along a meandering groove or land, in order from the inner circumference to the outer circumference, a PCA area, a PMA area, and a lead-in. Area, a program area, in the one having a lead-out area, at least pre-recorded time code information present in the program area is configured to include minutes, seconds, and frames,
The most significant bit indicating the frame is fixed, and
An optical information recording medium (claim 2) characterized in that it is increased by one minute every 61 seconds or more.

In the first means, the time code information is increased by one second every 76 frames or more. However, in the present means, the time information is incremented by a predetermined number K seconds of 61 seconds or more. Then, the ATIP data is increased by one minute. Therefore, in relation to the data recorded in ATIP, data of (80 × K × 75) frames can be recorded. Therefore, the recording capacity can be increased even when there are restrictions due to ATIP. In this means, as in the first means, the most significant bits indicating the minute, second, and frame are all fixed.

K is 61 when a decimal number is used,
62, 63, 64 ... 75, 76, 77, 78,
Any of 79 types of 79 types can be selected. The second digit of the second is 79 because the maximum value is 7 due to restrictions on the Orange Book. Since the first digit of the second can be A to F, using a hexadecimal number, for example, 7A, 7B,
7C, 7D, 7E, and 7F can be K values.

That is, in the present means, "increase by one second every 61 seconds or more" means that the decimal number is 61
A method of increasing the number of frames by one second for every number of frames equal to or more than a second. As an example of a specific method, a method of counting the number of frames in a decimal number and increasing the number of minutes by a maximum of 79 seconds, the number of seconds Is counted in hexadecimal notation and incremented by 1 minute for every 61 or more seconds of decimal notation.
If a hexadecimal number is used, it can be increased by one minute at maximum every 7F seconds. However, since the display device used for the drive may not support hexadecimal numbers, it is preferable to use decimal numbers from the viewpoint of versatility. In that case, the maximum value of K is preferably 79.

Further, it is unnecessary to explain that if the present means and the first means are used in combination, the recording capacity for a maximum of (80 × K × N) frames can be handled.

At present, there is actually a lower limit of the track pitch depending on the wavelength of the conventionally used optical pickup and the NA of the objective lens. Further, there is a lower limit on the linear velocity control of a conventionally used writer or player, because the minimum recording mark may be too short or the CLV control may not be applied.

Specifically, even when the prior invention is used, the track pitch is about 1.1 μm and the linear velocity is 0.9 m / se.
c is the lower limit. When converted from these, the current recordable capacity is limited to about 1.33 GB for 150 minutes. It is preferably 131.484 minutes or less and 1.15 GB or less, and more preferably 106.6666 minutes or less and 933.3 MB is good in terms of reliability of data writing / reproducing.

Needless to say, since the restrictions resulting from these other current technologies have nothing to do with the technical idea of the present invention, this is the restriction on the upper limit of the value of K in the present means. Not something.

According to the present means, the capacity can be maximized while using the conventional recording apparatus and reproducing apparatus, and the recording capacity can be increased without violating the standard imposed on the disc. Optical information recording medium. Further, even if the recording capacity is increased, the time code does not stop responding to the increase.

A third means for solving the above-mentioned problem is as follows.
A light beam having a meandering groove or land, a time code defined according to the meandering cycle of the meandering groove or land, and recording / reproducing of information by a light beam tracked along the meandering groove or land. An information recording medium, wherein the time code includes minutes, seconds,
A frame including the frame, the most significant bit indicating the frame is fixed, and 1 for every 76 frames or more.
An optical information recording medium (claim 3) characterized by being increased by seconds.

A fourth means for solving the above problem is as follows.
A light beam having a meandering groove or land, a time code defined according to the meandering cycle of the meandering groove or land, and recording / reproducing of information by a light beam tracked along the meandering groove or land. An information recording medium, wherein the time code includes minutes, seconds,
An optical information recording medium comprising a frame, wherein the most significant bit indicating the frame is fixed and is increased by one minute every 61 seconds or more. ).

In the third means and the fourth means, the optical information recording medium is limited to the one in which the time code is defined according to the meandering cycle of the meandering groove or land. The first means and the second means are different from each other, but the operation and effect are respectively different from those of the first means.
This is the same as the second means and the second means.

A fifth means for solving the above problem is as follows.
Any one of the first to fourth means, wherein the PCA area, the PMA area,
In one having a lead-in area, a program area, and a lead-out area, the track pitch of the program area is smaller than the track pitch of the PCA area, the PMA area, and the lead-in area (claim 5). It is.

In this means, the track pitches of the PCA area, the PMA area, and the lead-in area are set to the extents used in the conventional recording apparatus and reproducing apparatus, and the track pitch of the program area is Make it narrower than the track pitch. Of course, the track pitch in this case must be a pitch at which a tracking error does not occur more than an allowable value even when applied to a conventional recording apparatus and reproducing apparatus.

When the track pitch is reduced over the entire surface of the disk, the above-described problem occurs. However, in this means, the track pitches of the PCA area, the PMA area, and the lead-in area are reduced by the conventional recording apparatus and reproducing apparatus. The above-mentioned problem does not occur because the used amount is used.

According to the present means, it is possible to maximize the capacity of a conventional recording apparatus and reproducing apparatus while using it, and to increase the recording capacity without violating the standard imposed on the disc. Optical information recording medium. Furthermore, since any one of the first to fourth means is employed, even if the recording capacity is increased, the time code does not become incompatible with the time code.

In this means, since the PCA area, the PMA area, and the lead-in area located in the inner peripheral portion have a relatively large track pitch as compared with the program area, a plastic resin such as polycarbonate is used during injection molding. Easy to enter the meandering groove pattern on the surface (easy to inject). Therefore, transfer is performed reliably. This occurs because the resin is injected from the inner periphery. In addition, since the releasability of the inner peripheral portion is particularly good also at the time of peeling, a cloud is hardly generated, the inner diameter hole shape can be processed finely, and a substrate with less eccentricity can be manufactured.

A sixth means for solving the above-mentioned problem is:
Any one of the first to fourth means, wherein the PCA area, the PMA area,
In a device having a lead-in area, a program area, and a lead-out area, the track pitch between the program area and the lead-out area is smaller than the track pitch between the PCA area, the PMA area, and the lead-in area ( Claim 6).

In the present means, in addition to the program area, the track pitch of the lead-out area is set to the PCA area,
The track pitch in the PMA area and the lead-in area is narrower. By reducing the track pitch in the lead-out area, the program area can be expanded accordingly, and the recording capacity can be further increased.

A seventh means for solving the above-mentioned problem is as follows.
The fifth means or the sixth means, wherein the linear velocity of the PCA area is the same as the linear velocity of the program area (claim 7).

The PCA area is an area for trial recording.
Since the PMA area is an area for recording the memory usage status of the optical information recording medium, in these areas, tracking can be reliably performed, reading and writing can be performed with a sufficient margin, and calibration can be performed. It is desirable that this can be performed reliably. In this means,
Since the linear velocities of the PCA area and the program area are the same, the circumferential size of marks recorded on both areas can be the same, and writing and reading can be performed under the same conditions, so that calibration can be performed more accurately. Can be done.

Eighth means for solving the above-mentioned problem is:
Any one of the first means to the sixth means, in order from an inner circumference to an outer circumference, a PCA area, a PMA area,
In one having a lead-in area, a program area, and a lead-out area, the linear velocity of the program area is lower than the linear velocity of the PCA area, the PMA area, and the lead-in area (claim 8). It is.

In the present means, the linear velocities of the PCA area, the PMA area, and the lead-in area are set to the levels used in the conventional recording apparatus and reproducing apparatus, and the linear velocities of the program area and the lead-out area are adjusted. I try to make it slower.

When the linear velocity is reduced over the entire surface of the disk, the above-described problem occurs.
Since the linear velocities of the CA area, the PMA area, and the lead-in area are set to the levels used in the conventional recording apparatus and reproducing apparatus, for the same reason as described in the fifth means,
The problem described above does not occur.

According to the present means, it is possible to maximize the capacity of a conventional recording apparatus and reproducing apparatus while using it, and to increase the recording capacity without violating the standard imposed on the disc. Optical information recording medium.

A ninth means for solving the above-mentioned problem is:
Any one of the first means to the sixth means, in order from an inner circumference to an outer circumference, a PCA area, a PMA area,
In a device having a lead-in area, a program area, and a lead-out area, the linear velocity in the program area and the lead-out area is lower than the linear velocity in the PCA area, the PMA area, and the lead-in area ( Claim 9).

In this means, in addition to the program area, the linear velocity in the lead-out area is also lower than the linear velocity in the PCA area, PMA area, and lead-in area. By slowing down the track pitch in the lead-out area, the program area can be expanded correspondingly, so that the recording capacity can be further increased.

The optical system of a recording apparatus and a reproducing apparatus currently used has a wavelength of 780 nm and NA = 0.45. According to experiments by the inventors, it has been found that when this apparatus is used, the minimum track which can be read and written stably is used. The pitch is about 1.1 μm and the slowest linear velocity is about 0.9 μm. However, in this means, the track pitch is set to about 1.17 μ with a certain margin.
m and the linear velocity are set to about 1.0 μm. From now on, the diameter is 1
When the standard of the optical information recording medium of 20 mm is considered, the maximum value of the recording time is 120 minutes. Therefore, in this means, the maximum value of the program recording time is set to 120 minutes.
Further, since the conventional maximum value of the program recording time does not exceed 81 minutes even when various methods are used, in this means, the minimum value of the program recording time is limited to 81 minutes. Such an optical information recording medium can be realized by the first to ninth means.

A tenth means for solving the above-mentioned problems is a convex part corresponding to a concave part formed on any one of the first to ninth means in the optical information recording medium, and a tenth means corresponding to the convex part. A stamper having a recessed portion (claim 10).

According to this means, the ninth to ninth means can be used.
The optical information recording medium which is the means can be manufactured inexpensively and in large quantities by injection molding or the like.

An eleventh means for solving the above-mentioned problem is a signal generator for generating a signal including time code information, wherein the time code information is configured to include minutes, seconds, and frames. The signal generator is configured to increase by one second for each of the above.

A twelfth means for solving the above-mentioned problem is a signal generator for generating a signal including time code information, wherein the time code information includes minutes, seconds, and a frame. The signal generator according to claim 12, wherein the signal is increased by one minute every minute or more.

For example, when manufacturing the ninth means from the first means, a groove is formed by a laser cutting machine, and the groove is meandered, so that the time code information is changed to the meandering state (for example, the meandering frequency). Correspond. Further, the ninth to the ninth means may be used.
In the case of controlling recording / reproduction of information by means of
May generate time code information. In such a case, the signals from the signal generators of the eleventh means and the twelfth means are supplied to a laser cutting machine or a recording / reproducing apparatus to manufacture the ninth means from the first means. And record / play it back.

[0066]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description of the embodiments and examples, the wavelength 78 that is currently most frequently used is described.
0nm, a recording device using a photodetector with a numerical aperture of about 0.45,
In some cases, a playback device will be described as an example.
It is not only used for such a recording apparatus and a reproducing apparatus, but can also be used for a recording apparatus and a reproducing apparatus having different wavelengths and numerical apertures and therefore different resolutions. It can be used even when a standard conforming to the above specifications is established.

FIG. 1 is a diagram showing the structure of ATIP, which is time code information recorded in a meandering groove in advance. The first four bits are used as a sync signal for synchronization, and the following eight bits are used as BCD signals (two digits each) indicating minutes, seconds, and frames. However, conventionally, the maximum value of the seconds is 59 (decimal number), and the maximum value of the frame is 74 (decimal number). The minute value takes a value of 0 to 79 (decimal number) in the program area. The last 14 bits are used as CRC check bits. This ATIP information is usually recorded as a groove wobble signal at the time of manufacturing an optical information recording medium (more precisely, at the time of manufacturing a stamper).

FIG. 2 shows a change in the conventional ATIP information every time one frame advances in the conventional method. That is, the frame information is incremented by one every time one frame is advanced. First 78 minutes 59
In the case of 73 frames per second, going forward by one frame results in 78 minutes 59 seconds 74 frames. Going forward by one frame resets the frame information and causes a carry, and at the same time, causes the carry of the seconds information to occur. 00 seconds 00
It becomes a frame.

FIG. 3 shows a change in ATIP information every time one frame advances in the first example of the embodiment of the present invention. In this embodiment, when the frame is 78:59:73 at the beginning, the frame advances to 78:59:74 when the frame advances by one frame. When the frame advances by one frame, the frame information is reset and the carry occurs. Conventionally, the second information also carries a carry, resulting in a 79:00:00 frame, but becomes 78:60:00. The carry of the second information is incremented by one every 80 seconds. It has become so. In other words, one frame forward from the 78:79:74 frame results in a 79:00:00 frame.

At this time, the most significant bit of the BCD signal indicating the minute, the most significant bit of the BCD signal indicating the second, and the most significant bit of the BCD signal indicating the frame are incremented while being fixed to 0. In each embodiment described in detail below, the most significant bit is fixed to 0 in the same manner.

FIG. 4 shows a change in ATIP information every time one frame advances in the second example of the embodiment of the present invention. In this embodiment, if the frame is 78:59:73 at the beginning, if the frame advances one frame, the frame becomes 78:59:74, and if the frame advances one frame, the frame information is reset and the carry occurs if it is conventional. At the same time, the carry of the second information also causes a carry-over of 79 minutes 00 seconds 00 frames, but becomes 78 minutes 59 seconds 75 frames, and the carry of the frame information is incremented by 1 every 80 frames. It has become. One frame forward from 78:59:79 is 79:00:00.

FIG. 5 shows a change in ATIP information every time one frame advances in the third example of the embodiment of the present invention. In this embodiment, if the frame is 78:59:73 at the beginning, if the frame advances one frame, the frame becomes 78:59:74, and if the frame advances one frame, the frame information is reset and the carry occurs if it is conventional. At the same time, in the related art, the second information also carries a carry, which is 79 minutes 00 seconds 00 frames, but becomes 78 minutes 59 seconds 75 frames, and the carry of the frame information increases by 1 every 80 frames. As the increment is made, the carry of the second information is further incremented by one every 80 seconds. One frame forward from 78 minutes 79 seconds 79 frames is 79 minutes 00 seconds 00 frames.

FIG. 6 shows a change in ATIP information every time one frame advances in the fourth example of the embodiment of the present invention. In this embodiment, if the frame is 78:59:73 at the beginning, if the frame advances one frame, the frame becomes 78:59:74, and if the frame advances one frame, the frame information is reset and the carry occurs if it is conventional. At the same time, in the conventional case, the second information also carries a carry, resulting in a 79:00:00 frame, but becomes 78:59:75, and the carry of the frame information increases by one every 86 frames. As the increment is made, the carry of the second information is further incremented by one every 86 seconds. When the frame advances from the 78:79:79 frame by one frame, the frame becomes 78: 79: 7A frame, and is incremented in order. When the frame reaches the 78: 79: 7F frame, the next frame advances by 78: 7A: 0
When the number of frames reaches 0 and the frame reaches 78 minutes 7 F seconds and 7 F frames, the next frame advances to 79 minutes 00 seconds 00 frames.

In this manner, data of a time code of 1.64 times can be recorded in the same program area as the conventional one. It also uses the ATIP system defined by the Orange Book standard and uses it as it is, so it can be used with conventional CD-R and CD-RW writers.
Since IP decoding is possible, there is no problem in terms of compatibility.

The present invention can be applied to the case where the position of the minimum recording unit is indicated by a time code such as ATIP as described above, and the recording area of the optical information recording medium is other than the above-mentioned area. The present invention can be applied to an optical information recording medium that has been increased as a new area.

FIG. 7 is a diagram showing an arrangement of recording areas of a CD-R and a CD-RW according to an embodiment of the present invention and a distribution of a track pitch or a linear velocity in each area.

In FIG. 7, (a) shows the arrangement of the recording areas, where a non-recording area having no groove from the center,
The order is a PCA area, a PMA area, a lead-in area, a program area, a lead-out area, and a non-recording area having no groove. Each of these areas is manufactured so as to satisfy the Orange Book standards described in the section of the prior art.

In a conventional recording apparatus and reproducing apparatus having a photodetector having a wavelength of 780 nm and NA = 0.45, the standard of the track pitch is 1.5 μm to 1.7 μm. Therefore, in the present embodiment, the track pitches of the PCA area, the PMA area, and the lead-in area are set to values in this range. Conventionally, when the peak-to-peak value (push-pull signal) of a signal obtained when the photodetector crosses a track is equal to or larger than a predetermined ratio of the magnitude of a signal obtained from a mirror portion having no groove. Tracking is stably performed by the recording device and the reproducing device.

In a conventional recording apparatus and reproducing apparatus having a photodetector having a wavelength of 780 nm and NA = 0.45, the standard of linear velocity is 1.2 m / s. Therefore, in this means, the linear velocities of the PCA area, the PMA area, and the lead-in area are set to values in this range.

(B)-(e) are diagrams showing the distribution of track pitch or linear velocity corresponding to each area. (B) corresponds to the area layout of the conventional CD-R.
In the CA area, PMA area, lead-in area, program area, and lead-out area, both the track pitch and the linear velocity are constant.

(C) corresponds to the first embodiment of the CD-R area layout of the present invention, and the track pitch and linear velocity are the same as those of the conventional example in the PCA area, the PMA area and the lead-in area. Comparable (Track pitch is 1.5-1.7μ
m, the linear velocity is about 1.2 m / s). For it,
In the program area and the lead-out area, at least one of the track pitch and the linear velocity corresponds to the PCA area, P
It is smaller than that in the MA area (track pitch is 1.1 μm or more and less than 1.5 μm, and linear velocity is 0.90 m / s to less than 1.2 m / s).

Since the track pitch and the linear velocity in the PCA area, the PMA area, and the lead-in area are the same as those in the related art, the lead-in start radius, the program start radius, and the time from the lead-in start to the program start are within the standard. Can be stored. On the other hand, in the program area, at least one of the track pitch and the linear velocity is smaller than in the conventional example, so that the recording capacity of the program area can be increased.

Further, in this embodiment, at least one of the track pitch and the linear velocity is smaller in the lead-out area than in the conventional example, so that the read-out area can satisfy the recording time standard in the lead-out area. Since the area occupied by the out area can be reduced and that part can be used as a program area, the recording capacity of the program area can be increased. Of course, the present invention also includes the case where the track pitch and the linear velocity of the lead-out area are the same as those of the PCA area, the PMA area, and the lead-in area.

According to the results of the experiments by the present inventors, the wavelength 78
In order to obtain a sufficient push-pull signal and a reproduction signal with sufficient characteristics even with a conventional recording device or reproducing device using an optical system having a numerical aperture of about 0 nm and a numerical aperture of about 0.45, the track pitch must be set to 1.1 μm or more. It was found that the speed had to be set to 0.90 m / s or more. Therefore, in the embodiment shown here and in the following embodiments, the narrowed track pitch and the reduced linear velocity are also in this range. Therefore, an optical information recording medium capable of recording and reproducing can be obtained simply by using a conventionally used recording device and reproducing device.

(D) corresponds to the second embodiment of the CD-R area layout of the present invention, and differs from (c) in that at least the track pitch and the linear velocity in the lead-out area are different. One is that it is even smaller than in the program area. As a result, the area occupied by the lead-out area can be further reduced as long as the recording time standard of the lead-out area is satisfied, and that part can be used as a program area, thereby increasing the recording capacity of the program area. Can be done.

(E) corresponds to the CD-R area layout shown for reference, and at least one of the track pitch and the linear velocity is smaller in the lead-out area than in the other areas. That is. Also in this example, the area occupied by the lead-out area can be reduced as long as the recording time standard of the lead-out area is satisfied, and that part can be used as a program area. Can be increased.

When a master of such a disc is manufactured, processing corresponding to grooves and prepits is performed by a laser cutting machine or the like. In these processing machines, processing is performed by moving a table for fixing the master. There are a table moving type and a pickup moving type in which a processing tool such as a laser is moved to perform processing. When changing the track pitch, the pickup moving method has a faster response and better tracking accuracy, but the table moving method is superior in terms of the processing accuracy of the entire disc, so use both as appropriate. Is preferred.

When the linear velocity of the optical information recording medium or the master of such a disc is reduced, the length of the formed pits or one cycle of the meandering amplitude of the wobbled pre-groove in the rotational direction of the medium are reduced. It is also possible to reduce the length of time spent on Therefore, when forming a master disk of a disk having a wobble-shaped pre-groove, the linear velocity can be reduced by shortening the length of the meandering amplitude consumed in one cycle.

Hereinafter, a method of manufacturing a stamper according to an embodiment of the present invention will be described with reference to FIG. FIG.
1 is a substrate, 1a is a master, 2 is a photoresist layer, 3 is a Ni layer, 3a is a first mold, 4 is a resin liquid, 4a
Is the second mold, 5 is the base (glass disk), 6 is the Ni layer,
6a is a third mold.

As a substrate material, blue plate glass is processed into a donut-shaped disk to obtain a substrate 1. Thereafter, the substrate surface is precisely polished to a surface roughness of Ra = 1 nm or less. After the cleaning, a primer and a photoresist 2 are spin-coated on the substrate surface in this order. When prebaked, a photoresist layer 2 having a thickness of about 200 nm is formed on each substrate 1 (1).

Next, using a laser cutting device,
The photoresist 2 on the substrate 1 is exposed. The pattern of the exposure is a pattern corresponding to the grooves and prepits of the optical information recording medium according to the present invention.

The exposed resist 2 on the substrate 1 is developed with an inorganic alkali developer. The resist surface is spin-cleaned and then post-baked. Thereby, a resist pattern is formed (2).

Next, the master 1a is set in a sputtering apparatus, and a Ni layer 3 (conductive layer) is adhered to the surface.
Turn on. This completes the conductivity treatment. Then, by conducting electricity, Ni electroforming is performed to obtain a Ni plating layer 3 having a predetermined thickness (3). Then, when the Ni plating layer 3 is peeled off from the master 1a, a first mold 3a is obtained (4).

A protective paint (trade name: KLINCOAT S (manufactured by Fine Chemical Japan) as an example) is applied to the uneven surface of the first mold 3a by spin coating. After application, the coating is allowed to air dry. Thereby, the uneven surface is covered with the protective coat. After polishing the back surface of the first molding die 3a, the inside diameter and the outside diameter are punched out and dropped. Thus, a donut-shaped first molding die 3a is completed.

The master 1a after peeling off the first mold 3a is not damaged. Therefore, after cleaning the master 1a,
Again, this step can be performed to obtain a plurality of first molding dies 3a. By bonding a stainless steel substrate to the back surface of the first molding die 3a with an epoxy adhesive, the planarity of the first molding die 3a is improved.

Next, an ultraviolet curable resin liquid is prepared. The number of colors (APHA) of the resin liquid is 30 to 5 in consideration of heat and light absorption characteristics, mold release properties, light resistance, durability, and hardness.
0 and a refractive index of about 1.4 to 1.8 at 25 ° C. are preferable. The specific gravity of the resin liquid is about 0.8 to 1.3 at 25 ° C,
A viscosity of about 10 to 4800 CPS at 25 ° C. is preferable from the viewpoint of transferability.

Separately, a blue glass disk serving as the glass disk 5 is prepared. Then, the glass disk 5 is washed, a silane coupling agent as a primer is applied to the surface, and then baked. And the first molding die 3a with the uneven surface facing upward
Put resin liquid on the top. Then, the glass disk 5 was pressed from above, and the resin liquid 4 was sandwiched between the glass disk 5 and the first molding die 3a. At this time, care was taken to prevent bubbles from entering the resin liquid 4. Further, the glass disk 5 is pressed to uniformly spread the viscous resin liquid 4 over the entire surface of the first molding die 3a.

The resin liquid 4 is irradiated with ultraviolet rays from a mercury lamp through the glass disk 5. As a result, the resin liquid is hardened to form the second mold 4a made of a hard resin layer (5). Next, the second mold 4a is peeled off from the first mold 3a. The second mold 4a has an integral structure with the glass disk 5 (6).

The first mold 3a left after peeling is
Since it is not damaged, it can be used repeatedly. Therefore,
Many second molds 4a can be formed from one first mold 3a. The manufacture of the second mold 4a is easy, and
One sheet can be manufactured in 0 minutes.

Next, based on the second molding die 4a, a third molding die made of metal ("a metal stamper" according to claim 13) is formed. The manufacturing method is the same as that of the first molding die 3a. That is, the second molding die 4a is set in a sputtering apparatus, and a Ni layer 6 (conductive layer) is deposited on the surface, thereby completing the conductive treatment. Electroplating is performed to obtain a Ni plating layer 6 having a predetermined thickness (7), and the Ni plating layer 6 is peeled from the second mold 4a to obtain a third mold 6a (8).

A protective coating (for example, trade name: KLINCOAT S (manufactured by Fine Chemical Japan)) is applied to the uneven surface of the third mold 6a by spin coating. After application, the coating is allowed to air dry. Thereby, the uneven surface is covered with the protective coat. After polishing the back surface of the third mold 6a, the inside diameter and the outside diameter are punched out and dropped. Thus, a donut-shaped third molding die 6a is completed. This third mold is used as a stamper for actually manufacturing a disk.

FIG. 9 shows an outline of a configuration of a laser cutting machine for manufacturing an optical information recording medium according to an embodiment of the present invention. Laser light emitted from the UV laser is modulated by the AO modulator. This is modulation for forming prepits when grooves are formed on a resist master which is an optical information recording medium master. The laser light that has passed through the AO modulator is deflected by the EO deflector. This means that the grooves formed meander (wobbles)
The meandering cycle corresponds to the ATIP signal, as described later.

The laser beam that has passed through the EO deflector passes through a beam expander and is condensed by an objective lens.
The resist on the resist master is irradiated. The part irradiated with the laser beam is etched later to form a groove (recess)
Becomes The resist master is placed on a rotary feed table and moved left and right while being rotated. This allows
The resist on the resist master is exposed spirally or concentrically. Therefore, spiral or concentric grooves having wobbles are formed on the resist master.

The system control unit receives information from the computer, controls the AO modulator via the AO driver, and provides control information to a signal start / stop control data control unit. Signal start,
The stop control data control unit gives a signal to the ATIP signal generator and controls it based on this information.
From the ATIP signal generator, the frame shown in FIG.
A bit serial signal having the pattern shown in FIG. This signal is an FM-modulated signal as described later, and enters a wobble amplitude adjustment circuit via a noise reduction circuit.

The wobble amplitude adjusting circuit adjusts the amplitude of the wobble and supplies a signal of a different frequency to the EO driver according to the signal from the ATIP signal generator.
The EO driver controls the EO deflector according to this signal, and forms a wobble in the groove.

FIG. 10 is a diagram showing an outline of a circuit of an ATIP signal generator which is an example of an embodiment of the signal generator of the present invention. From the control information to the signal start / stop control data control unit shown in FIG. 9, various signals as shown in the figure are given to the control data unit.
The type of this signal is the same as that of the conventional signal. However, in the embodiment of the present invention, as described above, the time code rule information carries a different carry from the conventional signal. It has been.

This signal is given to the CPU which is the control unit of the ATIP signal generator. The CPU provides time code rule information to the time code data generation unit. The time code data generator is 6.
A 3 KHz signal is received, and a binary signal as shown in FIG. 1 is generated for each frame in synchronization with this signal. that time,
The pattern of the signal given to each frame is determined by the time code rule information. The time code data generation unit is supplied with a signal of 75 Hz from the frame timing unit, and outputs a signal for each frame according to the signal.

The CRC signal as shown in FIG. 1 is added to the signal from the time code data generation unit by the CRC unit, and is sent to the Sync unit via the Bi-Phase modulation unit.
In the Sync section, the Sync signal in FIG. 1 is added. Thus, a signal sequence for one frame in FIG. 1 is completed. This signal is sent to the FM modulator. A signal having a fundamental frequency of 22.05 KHz is sent from the master clock generator to the FM modulator. The EM modulator modulates the fundamental frequency by ± 1 KHz corresponding to “0” and “1” of the output signal and outputs the result.

The configurations and functions of the laser cutting machine and the ATIP signal generator described with reference to FIGS. 9 and 10 are well known. The present embodiment differs from the present embodiment only in the time code rule information provided to the ATIP signal generator, and differs only in that it has carry information according to the present invention.

Since what kind of control should be performed to carry the data according to the present invention is only to determine the number of digits before the carry is generated.
One skilled in the art will not need to explain.

[0111]

Examples Examples of the present invention will be described below. In the following embodiments, the PCA area and the PMA area are not particularly disclosed, but the optical disc and the stamper of the present embodiment are respectively formed to conform to the standard. Since the optical disk can be used as an optical disk even if it exists between the start of the groove and the start of the PCA area, the PCA area start area and the like are not specified here.

Example 1 An optical disk according to the present invention was manufactured. The size of the optical disk is 120 mm. First,
A stamper according to the present invention was manufactured. One important point was the laser cutting process. In this step of recording a groove on the photoresist master, ATIP conforming to the CD-R and CD-RW formats was recorded by groove wobbling (meandering groove).

However, the time code of the ATIP in the program area is incremented by one minute at 80 seconds. That is, in this time code, 60 seconds is 1
Not equivalent to a minute. 80 seconds corresponds to 1 minute. As for the frame, 75 frames were set to 1 second as usual. The ATIP time code in the PCA, PMA, lead-in area, and lead-out area from the start of ATIP is incremented by 1 in 75 frames as usual, and 6
It was decided to increment by 1 minute in 0 seconds.

Groove start and ATIP start radius 21m
m, groove end and ATIP end positions 59 mm, lead-in area start time 97:27:00, program area start time 00: 00: 00: 00, lead-out area start time (last possible start time of lead-out area ) 79:59:74, the track pitch from the groove start position to the lead-in start position is 1.48 μm, the linear velocity (at 1 × speed) is 1.10 m / s, and the track pitch in the lead-in area is 1.48 μm and the linear velocity (1 (At double speed)
Is 1.10m / s, track pitch of program area is 1.23μ
m, the linear velocity (at 1x speed) is 1.10m / s, the track pitch in the lead-out area is 1.20μm, and the linear velocity (at 1x speed) is 1.10m / s
s. The actual length of the program area is 1 in 106
9 seconds and 74 frames.

After developing the photoresist master exposed under these conditions, a nickel conductive film is sputtered, nickel electroforming is performed, the nickel plating is peeled off from the master, the photoresist is removed, cleaning is performed, a surface protective film is applied, the back surface is polished, Application of the backside protective film, punching of the inner and outer diameters, peeling of the both-sided protective film, and surface cleaning were sequentially performed to produce a stamper. The stamper is set in an injection molding apparatus (SD40 alpha manufactured by Sumitomo Heavy Industries, Ltd.), injection molded, a large number of polycarbonate disk substrates are duplicated, and a long-time CD according to the present invention is manufactured on a CD-R production line (manufactured by Singularus). -R was produced.

The dye is a phthalocyanine dye (Super Green manufactured by Ciba), the solvent is DBE, the protective coat lacquer is a UV curable coating material (DSM), and the printing ink applied thereon is manufactured by Teikoku Ink. This long CD-
Data was recorded on R using a 1- to 16-fold speed CD-R writer (manufactured by Sanyo Electric Co., Ltd.), and recording and reproduction were evaluated using a CD-R standard inspection apparatus (CD-CATS manufactured by Audio Development). As a result, the lead-in start radius was 22.9
Spec-in at 5mm without any problem, program start radius is 2
Specified at 4.9mm without any problem.

Further, it was possible to record long time data of 106 minutes (928 MB). Tests include disc-at-once mode and session-at-once
Mode and track-at-once mode.
80 minutes for disc at once (700MB)
Only considerable data could be recorded. However, in the session-at-once mode and the track-at-once mode, data of 80 minutes (700 MB) is recorded first, and data can be additionally recorded.
When the remaining 228 MB was recorded for 26 minutes, the recording was successful. After changing the writing software,
106 minutes at disk at once (928MB)
Could be recorded. I also tried the packet write mode, but could write 106 minutes worth of data little by little without any problems.

This CD-R has a longer time of 26 minutes than the conventional time limit of 80 minutes.
B) can record a large amount of recording data for a long time, but the jitter of this recording data is land jitter,
The pit jitter was as low as about 20 nsec, and both the pit deviation and the land deviation were spec-in. In addition, I3 and I11 both spec-in and reflectivity 71%,
A low BLER was obtained, the push-pull signal was satisfactory, and the tracking was good. This characteristic is from 1x speed to 16
It was maintained until double speed writing. In addition, Pulstec D
24 × writing and 36 × writing by the DU1000 did not hinder, and it was confirmed that the performance was maintained.

It is necessary to superimpose and record a time code called a subcode Q on the written information.
The absolute time from the beginning of the program area and its data individually, for example, the time (relative time) for each sector, track, and session are recorded as minutes, seconds, and frames.
In the case of a CD, since the minute has two digits, 99 minutes is the maximum. Therefore, if the time information is 99 minutes 59 seconds 74 frames or more, the time is reset to 00 minutes 00 seconds 00 frames.
However, even if the actual time is 106 minutes, in the present invention, since the time code is represented by 79 minutes or less, both the absolute time information and the relative time information can be used, and the subcode Q is synchronized with the ATIP timecode. Can be recorded. There is no problem in reading.

(Example 2) An optical disk according to the present invention was manufactured. The size of the optical disk is 120 mm. First,
A stamper according to the present invention was manufactured. One important point was the laser cutting process. In this step of recording a groove on the photoresist master, ATIP conforming to the CD-R and CD-RW formats was recorded by groove wobbling (meandering groove).

However, the time code of ATIP in the program area is incremented by 1 second in 80 frames. That is, in this time code, 75
The frame does not correspond to one second. 80 frames correspond to 1 second. As for seconds, 60 seconds was set to 1 minute as usual. The ATIP time code in the PCA, PMA, lead-in area, and lead-out area from the start of the ATIP is incremented for 1 second in 75 frames and 1 minute in 60 seconds as usual.

Groove start and ATIP start radius 21m
m, groove end and ATIP end positions 59 mm, lead-in area start time 97:27:00, program area start time 00: 00: 00: 00, lead-out area start time (last possible start time of lead-out area ) 79:59:74, the track pitch from the groove start position to the lead-in start position is 1.50 μm, the linear velocity (at 1 × speed) is 1.20 m / s, and the track pitch in the lead-in area is 1.50 μm and the linear velocity (1 (At double speed)
1.20m / s, track pitch in program area 1.40μ
The linear velocity (at 1x speed) is 1.20m / s at m, the track pitch in the lead-out area is 1.40μm, and the linear velocity (at 1x speed) is 1.20m / s
s. The effective length of the program area is 85 minutes 19
This is 69 frames per second.

After developing the photoresist master disc exposed under these conditions, a long-time CD-R according to the present invention was produced under the same conditions as in Example 1. Data was recorded on the long-time CD-R with a 1- to 16-fold speed CD-R writer (manufactured by Sanyo Electric Co., Ltd.), and evaluation of recording and reproduction was performed by a CD-R standard inspection device (CD-CATS manufactured by Audio Development). As a result, the lead-in start radius was 22.95mm and there was no problem, and the program start radius was 24.9mm.

Further, it was possible to record a long time data of 85 minutes (744 MB). For the test, I tried disk-at-once mode, session-at-once mode, and track-at-once mode. At the time of disk-at-once, only data equivalent to 80 minutes (700 MB) could be recorded. However, in the session-at-once mode and the track-at-once mode, 80 minutes (700 MB) of data is recorded first, and data can be additionally recorded. When recording, I could record without any problem. When the writing software was changed, it was possible to record data for 85 minutes (744 MB) even with Disk at Once. I tried the packet write mode, but could write 85 minutes worth of data little by little.

This CD-R is 85 minutes (744 MB), which is 5 minutes longer than the conventional 80 minute time limit.
It is possible to record large-capacity recording data for a long time, but the jitter of this recording data was as low as about 20 nsec for both land jitter and pit jitter, and both pit deviation and land deviation were spec-in. In addition, I3 and I11 are both spec-in, and reflectivity is 71%.
The ER was obtained, the push-pull signal was satisfactory, and the tracking was good. This characteristic was maintained from 1 × to 16 × writing. In addition, Pulstec DDU1
There was no problem with 24 × speed writing and 36 × speed writing with 000, and it was confirmed that the performance was maintained.

(Example 3) An optical disk according to the present invention was manufactured. The size of the optical disk is 120 mm. First,
A stamper according to the present invention was manufactured. One important point was the laser cutting process. In this step of recording a groove on the photoresist master, ATIP conforming to the CD-R and CD-RW formats was recorded by groove wobbling (meandering groove).

However, the time code of ATIP in the program area is incremented by one minute at 80 seconds. That is, in this time code, 60 seconds is 1
Not equivalent to a minute. 80 seconds corresponds to 1 minute. As for the frame, 80 frames were set to 1 second. ATI
The ATIP time code in the PCA, PMA, lead-in area, and lead-out area from the start of P is incremented by 1 second at 75 frames and 1 minute at 60 seconds as usual.

Groove start and ATIP start radius 21m
m, groove end and ATIP end positions 59 mm, lead-in area start time 97:27:00, program area start time 00: 00: 00: 00, lead-out area start time (last possible start time of lead-out area ) 79:59:74, the track pitch from the groove start position to the lead-in start position is 1.48 μm, the linear velocity (at 1 × speed) is 1.05 m / s, and the track pitch in the lead-in area is 1.48 μm and the linear velocity (1 (At double speed)
1.05m / s, track pitch of program area is 1.22μ
The linear velocity (at 1x speed) is 1.05m / s at m, the track pitch in the lead-out area is 1.20μm, and the linear velocity (at 1x speed) is 1.05m
/ S. The actual length of the program area is 113 minutes 25 seconds 19 frames.

After developing the photoresist master exposed under these conditions, a long-time CD-R according to the present invention was produced under the same conditions as in Example 1. Data was recorded on the long-time CD-R with a 1- to 16-fold speed CD-R writer (manufactured by Sanyo Electric Co., Ltd.), and evaluation of recording and reproduction was performed by a CD-R standard inspection device (CD-CATS manufactured by Audio Development). As a result, the lead-in start radius was 22.95mm and there was no problem, and the program start radius was 24.9mm.

Further, a long time data of 113 minutes (989 MB) could be recorded. Tests include disc-at-once mode and session-at-once
Mode and track-at-once mode.
80 minutes for disc at once (700MB)
Only considerable data could be recorded. However, in the session-at-once mode and the track-at-once mode, data of 80 minutes (700 MB) is recorded first, and data can be additionally recorded.
When the remaining 289 MB was recorded for 33 minutes, it could be recorded without any problem. After changing the writing software,
113 minutes (989MB) at disk at once
Could be recorded. I also tried the packet write mode, but could write 113 minutes worth of data little by little.

The present CD-R has a longer time of 33 minutes than the conventional 80 minute time limit of 113 minutes (989M
B) can record a large amount of recording data for a long time, but the jitter of this recording data is land jitter,
The pit jitter was as low as about 20 nsec, and both the pit deviation and the land deviation were spec-in. In addition, I3 and I11 both spec-in and reflectivity 71%,
A low BLER was obtained, the push-pull signal was satisfactory, and the tracking was good. This characteristic is from 1x speed to 16
It was maintained until double speed writing. In addition, Pulstec D
24 × writing and 36 × writing by the DU1000 did not hinder, and it was confirmed that the performance was maintained.

It is necessary to superimpose and record a time code called a subcode Q on the written information.
The absolute time from the beginning of the program area and its data individually, for example, the time (relative time) for each sector, track, and session are recorded as minutes, seconds, and frames.
In the case of a CD, since the minute has two digits, 99 minutes is the maximum. Therefore, if the time information is 99 minutes 59 seconds 74 frames or more, the time is reset to 00 minutes 00 seconds 00 frames.
However, even if the actual time is 113 minutes, in the present invention, since the time code is represented by 79 minutes or less, both the absolute time information and the relative time information can be used, and the subcode Q is synchronized with the ATIP timecode. Can be recorded. There is no problem in reading.

Example 4 An optical disk according to the present invention was manufactured. The size of the optical disk is 120 mm. First,
A stamper according to the present invention was manufactured. One important point was the laser cutting process. In this step of recording a groove on the photoresist master, ATIP conforming to the CD-R and CD-RW formats was recorded by groove wobbling (meandering groove).

However, the time code of the ATIP in the program area is incremented by one minute at 86 seconds. That is, in this time code, 60 seconds is 1
Not equivalent to a minute. 86 seconds corresponds to 1 minute. As for the frames, one second was set for 86 frames. ATI
The ATIP time code in the PCA, PMA, lead-in area, and lead-out area from the start of P is incremented by 1 second at 75 frames and 1 minute at 60 seconds as usual.

Groove start and ATIP start radius 21 m
m, groove end and ATIP end positions 59 mm, lead-in area start time 97:27:00, program area start time 00: 00: 00: 00, lead-out area start time (last possible start time of lead-out area 79:59:74, the track pitch from the groove start position to the lead-in start position is 1.18 μm, the linear velocity (at 1 × speed) is 1.00 m / s, and the track pitch in the lead-in area is 1.18 μm and the linear velocity (1 (At double speed)
1.00m / s, track pitch of program area 1.18μ
m, the linear velocity (at 1x speed) is 1.00m / s, the track pitch in the lead-out area is 1.18μm, and the linear velocity (at 1x speed) is 1.00m
/ S. The effective length of the program area is 130 minutes 59 seconds 07 frames.

After developing the photoresist master disc exposed under these conditions, a long-time CD-R according to the present invention was produced under the same conditions as in Example 1. Data was recorded on the long-time CD-R with a 1- to 16-fold speed CD-R writer (manufactured by Sanyo Electric Co., Ltd.), and evaluation of recording and reproduction was performed by a CD-R standard inspection device (CD-CATS manufactured by Audio Development). As a result, the lead-in starting radius was 22.95mm, which was a spec-in without any problem.

Further, a long time data of 131 minutes (1.15 GB) could be recorded. Test the disk
I tried at once mode, session at once mode, and track at once mode. 80 minutes (700 for disc at once)
Only MB) worth of data could be recorded. But,
In session-at-once mode and track-at-once mode, data of 80 minutes (700 MB) was recorded first, and data could be additionally recorded. Then, 450 MB of remaining 51 minutes was recorded. However, recording was successful. After changing the writing software, the disc at once is 131 minutes (1.1 minutes).
5 GB) of data could be recorded. The packet write mode was also tried, but data of 131 minutes could be written little by little without any problem.

This CD-R is 131 minutes (1.15 minutes), which is 51 minutes longer than the conventional 80 minute time limit.
GB) can be recorded for a long time, and the recording data has a low jitter of about 20 nsec for both the land jitter and the pit jitter. Both the pit deviation and the land deviation are spec-in. Both I3 and I11 were spec-in and reflectivity was 71%, low BLER was obtained, push-pull signal was no problem, and tracking was good. This characteristic was maintained from 1 × to 16 × writing. Further, it was confirmed that there was no problem in the 24 × speed writing and the 36 × speed writing by the Pulse Tech DDU1000, and the performance was maintained.

It is necessary to superimpose and record a time code called a subcode Q on the written information.
The absolute time from the beginning of the program area and its data individually, for example, the time (relative time) for each sector, track, and session are recorded as minutes, seconds, and frames.
In the case of a CD, since the minute has two digits, 99 minutes is the maximum. Therefore, if the time information is 99 minutes 59 seconds 74 frames or more, the time is reset to 00 minutes 00 seconds 00 frames.
However, even if the actual time is 131 minutes, in the present invention, since the time code is represented by 79 minutes or less, both the absolute time information and the relative time information can be used, and the subcode Q is synchronized with the ATIP timecode. Can be recorded. There is no problem in reading.

[0140]

As described above, according to the present invention, the conventional recording apparatus and reproducing apparatus can be used to their full potential while using the conventional recording apparatus and reproducing apparatus. Instead, an optical information recording medium having an increased recording capacity can be provided.

[Brief description of the drawings]

FIG. 1 shows ATI, which is time code information recorded in advance.
FIG. 3 is a diagram illustrating a configuration of P.

FIG. 2 shows changes in conventional ATIP information every time one frame advances.

FIG. 3 shows a change in ATIP information every time one frame advances in the first example of the embodiment of the present invention.

FIG. 4 shows a change in ATIP information every time one frame advances in a second example of the embodiment of the present invention.

FIG. 5 shows a change in ATIP information every time one frame advances in a third example of the embodiment of the present invention.

FIG. 6 shows a change in ATIP information every time one frame advances in a fourth example of an embodiment of the present invention.

FIG. 7 is a diagram showing an arrangement of recording areas of a CD-R and a CD-RW according to an embodiment of the present invention and a distribution of a track pitch or a linear velocity in each area.

FIG. 8 is a diagram illustrating a method of manufacturing a stamper which is an example of an embodiment of the present invention.

FIG. 9 is a diagram showing an outline of a configuration of a laser cutting machine for manufacturing an optical information recording medium according to an embodiment of the present invention.

FIG. 10 is a diagram showing an outline of a circuit of an ATIP signal generator which is an example of an embodiment of the signal generator of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Substrate, 1a ... Master, 2 ... Photoresist layer, 3 ... N
i-layer, 3a: first molding die, 4: resin liquid, 4a: second molding die, 5: base (glass disk), 6: Ni layer, 6a: third
Mold

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference)

Claims (12)

[Claims] 1. A disc-shaped optical information recording medium for recording / reproducing information by a light beam tracked along a meandering groove or land, wherein a PCA area is arranged in order from an inner periphery to an outer periphery. In an apparatus having a PMA area, a lead-in area, a program area, and a lead-out area, at least time code information recorded in advance in the program area includes minutes, seconds, and a frame. An optical information recording medium, wherein upper bits are fixed and are increased by one second every 76 frames or more. 2. A disc-shaped optical information recording medium for recording / reproducing information by a light beam tracked along a meandering groove or land, wherein a PCA area is arranged in order from an inner periphery to an outer periphery. In an apparatus having a PMA area, a lead-in area, a program area, and a lead-out area, at least time code information recorded in advance in the program area includes minutes, seconds, and a frame. An optical information recording medium characterized in that upper bits are fixed and are increased by one minute every minute of 61 seconds or more. 3. A meandering groove or land, a time code is defined according to a meandering period of the meandering groove or land, and information is recorded by a light beam tracked along the meandering groove or land. An optical information recording medium for reproduction, wherein the time code includes minutes, seconds, and a frame; the most significant bit indicating the frame is fixed; and the time code is 1 second for every 76 frames or more. An optical information recording medium characterized by being increased. 4. A meandering groove or land, a time code is defined according to a meandering cycle of the meandering groove or land, and information is recorded by a light beam tracked along the meandering groove or land. An optical information recording medium for reproduction, wherein the time code is configured to include a minute, a second, and a frame; the most significant bit indicating the frame is fixed; An optical information recording medium characterized in that the optical information recording medium is increased by an amount. 5. The optical information recording medium according to claim 1, wherein the PCA is sequentially arranged from an inner circumference to an outer circumference.
Area, PMA area, lead-in area, program area,
In those having a lead-out area, a PCA area,
An optical information recording medium, wherein a track pitch of a program area is narrower than a track pitch of a PMA area and a lead-in area. 6. The optical information recording medium according to claim 1, wherein the PCA is sequentially arranged from an inner circumference to an outer circumference.
Area, PMA area, lead-in area, program area,
In those having a lead-out area, a PCA area,
An optical information recording medium characterized in that the track pitches of the program area and the lead-out area are narrower than the track pitches of the PMA area and the lead-in area. 7. The optical information recording medium according to claim 5, wherein the PCA area and the program area have the same linear velocity. 8. One of claims 1 to 6
The optical information recording medium according to the item, which has a PCA area, a PMA area, a lead-in area, a program area, and a lead-out area in order from the inner circumference to the outer circumference, wherein the PCA area, the PMA area, and the read An optical information recording medium, wherein the linear velocity of the program area is lower than the linear velocity of the in area. 9. The method according to claim 1, wherein
3. The optical information recording medium according to item 1, which has a PCA area, a PMA area, a lead-in area, a program area, and a lead-out area in order from the inner circumference to the outer circumference, wherein An optical information recording medium, wherein the linear velocity of the program area and the lead-out area is lower than the linear velocity of the in area. 10. A stamper having a convex portion corresponding to the concave portion and a concave portion corresponding to the convex portion formed on the optical information recording medium according to claim 1. Description: 11. A signal generating device for generating a signal including time code information, wherein the time code information includes minutes,
A signal generator comprising a second and a frame, wherein the signal is increased by one second every 76 frames or more. 12. A signal generating device for generating a signal including time code information, wherein the time code information includes minutes,
It is composed of seconds and frames, and is set to 1 every 61 seconds or more.
A signal generator characterized in that the signal is increased by an amount.