JP2003132586A - Data recording medium, recording support, auxiliary recording sheet, and data recording device and method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a data recording medium by sticking an auxiliary recording sheet which is printed with a guide pattern for data recording to a base plate which has a recording layer. SOLUTION: A recording support 2 has a recording layer 12 recordable by radiating a light beam provided on a light transmissive base plate 11 on its flat surface. An optical transmissive auxiliary recording sheet 3 is printed with a guide pattern for data recording. And the auxiliary recording sheet 3 is adhered to the above base plate on its light beam irradiating surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data recording medium in which a recording auxiliary sheet on which a pattern for guiding data recording is printed is attached to a record carrier having a recording layer provided on a substrate, and this data recording medium. And a data recording apparatus and method for recording data on a record carrier having a recording auxiliary sheet attached thereto, a recording auxiliary sheet attached to a recording carrier, and a data recording medium.

[0002]

2. Description of the Related Art An optical disk on which data can be additionally written or rewritten is provided with an uneven pattern of lands and grooves on one surface of a light transmissive substrate, and an organic dye material layer and a phase change material are formed on the uneven pattern. A layer is provided, a reflective layer is provided on the layer, and a protective layer is provided on the reflective layer. Data is recorded by irradiating a light beam from the substrate side. The concavo-convex pattern provided on the substrate is used for clock signal generation during recording, tracking servo control, addressing, and the like.

Concretely, the concavo-convex pattern provided on the substrate is molded by placing a stamper having the concavo-convex pattern formed on a mold of an injection molding machine and transferring the pattern.

[0004]

However, since the concavo-convex pattern of the substrate is formed by transferring the stamper pattern, it is difficult to form the groove depth and width as designed. . Further, the stamper for forming the concavo-convex pattern on the substrate deteriorates in quality when the stamping is repeated, and accordingly, the groove formed on the substrate can also be formed to a predetermined depth and width. It's gone. Further, a stamper is required depending on the type of optical disc.

An object of the present invention is to easily manufacture a recording auxiliary sheet by joining a recording auxiliary sheet on which a pattern for guiding data recording is printed, to a substrate provided with a recording layer, and at the same time, to record an auxiliary recording material. It is to provide a data recording medium capable of recording data in various formats by exchanging sheets.

Another object of the present invention is to provide a recording auxiliary sheet which constitutes the above-described data recording medium and a record carrier to which the recording auxiliary sheet is joined.

A further object of the present invention is to provide a data recording device and method for such a data recording medium.

[0008]

In order to solve the above-mentioned problems, a data recording medium according to the present invention has a recording layer which is recordable by irradiation of a light beam on one surface of a light transmissive substrate. A record carrier and a light-transmissive recording auxiliary sheet on which a pattern for guiding data recording is printed,
The recording auxiliary sheet is bonded to the light beam irradiation surface side of the substrate.

Further, in order to solve the above-mentioned problems, the recording auxiliary sheet according to the present invention is bonded to a record carrier in which a recording layer capable of recording by irradiation of a light beam is provided on one surface of a light transmissive substrate. The recording auxiliary sheet is formed by printing a pattern for guiding data at the time of data recording on the sheet body, and is joined to the light beam irradiation surface side of the substrate.

Further, in order to solve the above problems, the record carrier according to the present invention is provided with a recording layer capable of recording by irradiation of a light beam on one surface of a light transmissive substrate, and A light transmissive recording auxiliary sheet on which a pattern for guiding data recording is printed is joined to the irradiation surface side.

Further, in order to solve the above-mentioned problems, the method of manufacturing a data recording medium according to the present invention forms a recordable recording layer by irradiating a light beam on one surface of a light transmissive substrate for recording. A step of manufacturing a carrier, a step of printing a pattern for guiding data recording on a light-transmitting sheet body to manufacture a recording auxiliary sheet, and a step of bonding the recording auxiliary sheet to the light beam irradiation surface side of the substrate. And steps.

Further, in order to solve the above-mentioned problems, the data recording apparatus according to the present invention is a record carrier in which a recording layer capable of recording by irradiation of a light beam is provided on one surface of a light-transmissive substrate. A data recording medium on which a light-transmissive recording auxiliary sheet on which a pattern for guiding data is printed is joined is mounted on the light beam irradiation surface side of the substrate, and a driving unit for driving the data recording medium, The data recording medium driven by the driving means is irradiated with a light beam, and the recording means records the data on the recording layer by detecting the light beam reflected by the reflective layer. Tracking servo control is performed by a guide pattern for recording data on the recording auxiliary sheet.

Furthermore, in order to solve the above-mentioned problems, the data recording method according to the present invention provides a record carrier in which a recording layer capable of recording by irradiation of a light beam is provided on one surface of a light transmissive substrate. The data recording medium, to which a light-transmissive recording auxiliary sheet, on which a pattern for data recording is printed, is printed, is driven on the light beam irradiation surface of the substrate, and the light beam is irradiated to the data recording medium. The light beam reflected by the reflective layer is detected, and the tracking servo control is performed according to the guide pattern for recording data on the recording auxiliary sheet.

Furthermore, in order to solve the above-mentioned problems, the data recording medium according to the present invention has a first recording layer having a recording layer which is recordable by irradiation of a light beam on one surface of a light transmissive substrate. A record carrier composed of a substrate and a second substrate which is attached to the first substrate with one surface side being a bonding surface, and a light-transmissive recording aid in which a pattern for guiding data recording is printed. And a recording auxiliary sheet bonded to the side of the record carrier on which the light beam is irradiated.

Further, in order to solve the above-mentioned problems, the recording auxiliary sheet according to the present invention has a first recording layer provided with recording on one surface of a light-transmissive substrate by irradiation of a light beam. A recording auxiliary sheet to be bonded to a record carrier comprising a substrate and a second substrate which is bonded to the first substrate with one surface side being a bonding surface, and is a guide for data recording on a sheet body. Pattern is printed,
The record carrier is bonded to the light beam irradiation surface side.

Furthermore, in the record carrier according to the present invention, in order to solve the above-mentioned problems, a first substrate in which a recording layer capable of recording by irradiation of a light beam is provided on one surface of a light transmissive substrate. A second substrate is bonded to one surface side of the one surface, and a light-transmissive recording auxiliary sheet on which a guide pattern for data recording is printed is bonded to the light beam irradiation surface side of the substrate. .

Further, in the method for manufacturing a data recording medium according to the present invention, in order to solve the above-mentioned problems, a recording layer capable of recording by irradiation of a light beam is provided on one surface of a light transmissive substrate. A step of manufacturing a record carrier by bonding a second substrate to one surface side of the first substrate, and a recording auxiliary sheet is manufactured by printing a pattern for data recording guide on a light transmissive sheet body. And a step of bonding a recording auxiliary sheet to the light beam irradiation surface side of the record carrier.

Further, in order to solve the above-mentioned problems, the data recording apparatus according to the present invention is provided with a first recording layer having a recording layer which is recordable by irradiation of a light beam on one surface of a light transmissive substrate. Data in which a second substrate is joined to one surface side of the substrate, and a light-transmissive recording auxiliary sheet on which a guide pattern for data recording is printed is joined to the light beam irradiation surface side of the substrate. By irradiating a light beam to the recording medium mounted and driving the data recording medium and the data recording medium driven by the driving unit, and detecting the light beam reflected by the reflective layer, A recording means for recording data on the recording layer, wherein the recording means is
Tracking servo control is performed by a guide pattern for recording data on the recording auxiliary sheet.

Further, in order to solve the above-mentioned problems, the data recording method according to the present invention has a first recording layer in which a recording layer capable of recording by irradiation of a light beam is provided on one surface of a light transmissive substrate. Data in which a second substrate is joined to one surface side of the substrate, and a light-transmissive recording auxiliary sheet on which a guide pattern for data recording is printed is joined to the light beam irradiation surface side of the substrate. The recording medium is driven to irradiate the data recording medium with a light beam, the light beam reflected by the reflection layer is detected, and tracking servo control is performed by a guide pattern for recording data on the recording auxiliary sheet.

Furthermore, in order to solve the above-mentioned problems, the data recording medium according to the present invention comprises a record carrier having a recording layer which is recordable by irradiation of a light beam on one surface of a light transmissive substrate. And a light-transmissive recording auxiliary sheet on which a pattern for guiding data recording is printed, and the recording auxiliary sheet is bonded on the recording layer.

Furthermore, in order to solve the above-mentioned problems, the recording auxiliary sheet according to the present invention is a record carrier in which a recording layer capable of recording by irradiation of a light beam is provided on one surface of a light transmissive substrate. A recording auxiliary sheet to be joined,
A pattern for guiding the data recording is printed on the sheet body, and the sheet body is bonded onto the recording layer of the substrate.

Furthermore, in order to solve the above-mentioned problems, the record carrier according to the present invention is provided with a recording layer capable of recording by irradiation of a light beam on one surface of a light transmissive substrate, and on this recording layer. A light transmissive recording auxiliary sheet on which a guide pattern for printing data is printed is joined to the.

Further, in order to solve the above-mentioned problems, the method for manufacturing a data recording medium according to the present invention forms a recording layer by irradiating a light beam on one surface of a light-transmissive substrate to perform recording. The steps of manufacturing a carrier, printing a pattern for guiding data recording on a light-transmissive sheet body to manufacture a recording auxiliary sheet, and joining the recording auxiliary sheet on the recording layer of the substrate. Have.

Furthermore, in order to solve the above-mentioned problems, the data recording apparatus according to the present invention is provided with a recording layer capable of recording by irradiation of a light beam on one surface of a light transmissive substrate. A data recording medium having a light-transmissive recording auxiliary sheet on which a guide pattern for recording data is printed is mounted thereon, and is driven by a driving unit that drives the data recording medium and a driving unit. Recording means for recording data on the recording layer by irradiating the data recording medium with a light beam and detecting the light beam reflected by the reflecting layer. Tracking servo control is performed according to the guide pattern used at the time.

Further, in order to solve the above-mentioned problems, the data recording method according to the present invention is provided with a recording layer capable of recording by irradiation of a light beam on one surface of a light transmissive substrate. A data recording medium on which a light-transmissive recording auxiliary sheet on which a guide pattern for data recording is printed is joined is driven, and the data recording medium is irradiated with a light beam and reflected by a reflective layer. Then, the tracking servo control is performed according to the pattern for guiding the data recording on the recording auxiliary sheet.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An optical disc to which the present invention is applied and a recording / reproducing apparatus for this optical disc will be described below with reference to the drawings.

The optical disc 1 to which the present invention is applied is shown in FIG.
And, as shown in FIG. 2, a record carrier 2 having a substrate provided with a recording layer, and a recording auxiliary sheet 3 on which a pattern for guiding data recording which is attached to the record carrier 2 is printed.
With. When the step of attaching the recording auxiliary sheet 3 to the record carrier 2 is performed in a factory or the like, as shown in FIG.
The recording auxiliary sheet 3 is attached to the record carrier 2 with a light-transmissive adhesive. When the recording auxiliary sheet 3 is attached to the record carrier 2 by the hand of the user,
As shown in FIG. 2, an adhesive layer is provided on the joint surface with the record carrier 2, and a recording auxiliary sheet 3 having a release sheet attached to the adhesive layer is provided to the user, and the user peels the release sheet, The recording auxiliary sheet 3 is attached to the record carrier 2 via an adhesive layer.

Specifically, as shown in FIG. 3, the record carrier 2 constituting the optical disc 1 has a light-transmissive substrate 11
And the recording layer 12 provided on one surface of the substrate 11.
And a protective layer 13 provided on the recording layer 12.

The substrate 11 is a synthetic resin substrate formed by injection molding a synthetic resin such as a glass substrate or polycarbonate, and is light transmissive so that the light beam emitted from the optical pickup can be transmitted during recording and reproduction. Is formed. For example, the substrate 11 is formed to have a thickness of approximately 1.2 mm so that it can maintain compatibility with existing compact discs and the like.
Further, in the substrate of the conventional optical disc, lands and grooves are provided on one surface, but in the substrate 11 of the optical disc 1 to which the present invention is applied, such a concavo-convex pattern is not provided and it is flat. Is formed in. And
The substrate 11 is provided with the recording layer 12 and the like on one surface side,
The other surface is the surface to which the recording auxiliary sheet 3 is attached. Further, a center hole 11a is provided in the center of the substrate 11 so that a disk table constituting a rotary drive mechanism on the recording / reproducing apparatus side is engaged with the center hole 11a.

A recording layer 12 for recording data is provided on one surface of the substrate 11. This recording layer 12
Is composed of an organic dye material layer 12a deposited on one surface of the substrate 11 by spin coating or the like, and a reflective layer 12b provided on the organic dye material layer 12a. Since the optical disc 1 is of the write-once type, the recording layer 12 is provided with the organic dye material layer 12a. However, in the present invention, when the optical disc 1 is of the rewritable type, the recording layer 12 is
A phase change material layer may be provided, and at the time of magneto-optical recording, the recording layer 12 may be provided with a magneto-optical recording layer.

On the organic dye material layer 12a, a reflective layer 12b that reflects the light beam incident on the substrate 11 is formed. The reflective layer 12b is formed on the organic dye material layer 12a by vapor deposition or the like using a metal material such as aluminum, gold, or silver that can provide a necessary reflection amount during recording and reproduction.

Further, the reflection layer 12b constituting the recording layer 12
A protective layer 13 for protecting the recording layer 12 is formed thereon. The protective layer 13 is formed, for example, by applying an ultraviolet curable resin on the reflective layer 12b by spin coating and irradiating with ultraviolet light.

The recording auxiliary sheet 3 attached to the other surface side of the substrate 11 is a light-transmitting film of synthetic resin such as polycarbonate or polymethylmethacrylate, and is formed to have a thickness of about 10 μm to 150 μm. Has been done. A predetermined pattern is formed on such a recording auxiliary sheet 3 by monochrome printing, printing using ultraviolet cut ink, or printing using infrared cut ink.
That is, the ink used for printing is determined by the wavelength of the light beam used. Then, on the recording auxiliary sheet 3, a pattern is printed at a position such as a groove or a pit, which is a recess, and the light beam is not transmitted at this position. That is, in the conventional optical disc, the amount of reflected light is reduced in the concave portion provided with the groove, the pit, etc., and the signal is detected by the difference in the amount of light from the land. Therefore, in the optical disc 1 to which the present invention is applied, a pattern that does not transmit a light beam is printed at a position where the conventional optical disc becomes a concave portion, and a pseudo concave portion is provided. Further, the recording auxiliary sheet 3 is provided with a center hole 20 at the center thereof corresponding to the center hole 11a of the substrate 11 provided at the center of the substrate 11.

Specifically, such a recording auxiliary sheet 3 is printed with a pattern of lands and grooves as shown in FIG. The groove 15 modulates address information and a clock signal by bi-phase (Bi-Phase),
Further, it is wobbled by FM modulation, and by printing a color such as black that does not reflect the light beam, the groove provided on the substrate of the conventional optical disk is configured in a pseudo manner. The wobble groove 15 is used as tracking control data during recording and also as an address. And wobble groove 15
During this period, nothing is printed so as to have a light-transmitting property, and the land provided on the substrate of the conventional optical disk is configured in a pseudo manner. In the recording / reproducing apparatus, a tracking servo is performed by a component obtained by removing a wobble component from a push-pull signal generated by a push-pull method that detects the intensity distribution of the reflected light amount of the light beam irradiated on the surface of the optical disc 1 where the recording auxiliary sheet 3 is joined. Address information is extracted by performing control and demodulating the wobble component extracted from the push-pull signal. Also, the recording / reproducing apparatus extracts a clock from this wobble component and records data. Then, the light beam transmits through the land 16 between the wobble grooves 15 and further through the substrate 11, so that data can be recorded on the recording layer 12 provided on one surface side of the substrate 11. It has become.

The recording auxiliary sheet 3 may be configured as shown in FIG. 5 depending on the format of the optical disc. In the example shown in FIG. 5, the land 1 is provided in a spiral shape.
A data area in which the patterns of 7 and the groove 18 are provided is provided, and an address area in which the pit pattern 19 is formed is provided between the data areas, that is, radially. The groove 18 is a so-called straight groove, and by printing a color such as black that does not reflect the light beam, the groove provided on the substrate of the conventional optical disk is configured in a pseudo manner. Also, do not print anything between the grooves 18 so as to have optical transparency,
The land provided on the substrate of the conventional optical disk is configured in a pseudo manner. Land 1 between the grooves 18
7 transmits the light beam, and this light beam is further transmitted to the substrate 1
Data can be recorded on the recording layer 12 by transmitting 1 through the recording layer 12. The pit pattern 19 is formed by printing a color such as black that does not reflect the light beam according to the address information. Also,
The pit pattern 19 is composed of at least two wobble pits provided so as to be displaced with respect to the recording track Tr, and is also used as a pattern for tracking control. In this pit pattern 19, at least one pit may be used for clock generation.
At the time of recording, the recording / reproducing apparatus generates a clock from the pit pattern 19 and performs tracking servo control by detecting the difference in the amount of reflected light when passing through each pit. Also, the recording / reproducing apparatus has a pit pattern 1
Address information is extracted from 9 and the data is recorded in the groove 18 of the data recording area. In the recording auxiliary sheet 3 shown in FIG. 5, the groove 18 is wobbled in accordance with a clock signal, the data recording position is specified by the address information composed of the pit pattern 19 synchronized with the wobble, and the data is recorded. You may do it.

Further, the recording auxiliary sheet 3 may be as shown in FIG. 6 depending on the format of the optical disc.
FIG. 6 shows the pit pattern 2 in the sample servo system.
1, and between the data areas where nothing is printed,
A sample servo area in which a pit pattern 21 is formed is provided. The pit pattern 21 in the sample servo area is composed of wobble pits, and of these, for example, the pit 21a provided on the recording track Tr is used for clock generation and is displaced with respect to the recording track Tr. The plurality of pits 21b are used for tracking control. The pit pattern 21 is formed by printing a color such as black that does not reflect the light beam, as in the above example. In the recording / reproducing device, pit 2
The clock is generated by 1a and each pit 21
Tracking servo control is performed by detecting the difference between the reflected light amounts of a and 21b, and the data area is recorded between the sample servo areas by irradiating a light beam.

Further, in addition to these patterns, a pattern for focusing control may be printed on the recording auxiliary sheet 3. Further, as shown in FIG. 7, the recording auxiliary sheet 3 is provided with, for example, the pattern of the groove 15 and the land 16 as shown in FIG. 4 on the outer peripheral side, and the reproduction-only pit pattern 24 is printed on the inner peripheral side. You may do it. According to this, the reproduction-only data is read in the area where the pit pattern 24 is provided, and the data is recorded and reproduced in the area where the groove 15 and the land 16 are provided. Of course, in the present example, conversely, the pit pattern 24 is provided on the outer peripheral side and the groove 1 is formed on the inner peripheral side.
The pattern of 5 and the land 16 may be provided.

The recording auxiliary sheet 3 constructed as described above
Is bonded to the other surface side of the substrate 11, that is, the surface on the light beam irradiation side, by the adhesive 22. As the adhesive 22 used for joining the recording auxiliary sheet 3 to the other surface, a UV-curable adhesive having a light transmitting property, a pressure sensitive adhesive, or a dry photopolymer adhesive is used. It should be noted that the adhesive 22 may be an easily removable one so that the recording auxiliary sheet 3 can be replaced according to the format.

As shown in FIG. 1, when the recording auxiliary sheet 3 is attached to the other surface of the substrate 11 in a factory or the like,
The adhesive 22 is applied to the other surface of the substrate 11, and thereafter,
The recording auxiliary sheet 3 is attached. This bonding is performed by bonding the recording auxiliary sheet 3 to the other surface of the substrate 11 and then pressing the recording auxiliary sheet 3 against the other surface of the substrate 11 by pressure bonding with a pressure roller.
After this, the substrate 11 to which the recording auxiliary sheet 3 is attached
In order to remove air bubbles mixed in during bonding, defoaming treatment is performed under reduced pressure. After that, when a UV-curable adhesive is used, it is irradiated with ultraviolet rays to cure the adhesive.

Further, as shown in FIG. 2, when the record carrier 2 and the recording auxiliary sheet 3 are separately distributed to the user, as shown in FIG. The agent 22 is applied, and the release sheet 23 is attached to the adhesive 22 so that the release sheet 23 is distributed to users. Then, the user peels off the release sheet 23 to expose the adhesive 22 and attaches it to the other surface of the substrate 11.

By the way, when the recording auxiliary sheet 3 is attached to the other surface of the substrate 11, recording is performed with the other surface of the substrate 11 so that the bonding surface of the substrate 11 and the recording auxiliary sheet 3 can be easily aligned. A positioning protrusion may be provided on one of the joining surfaces of the auxiliary sheet 3 and a positioning recess may be provided on the other. For example, the positioning protrusion coating positioning recesses are provided in the non-signal recording area on the outer peripheral side and / or the inner peripheral side other than the data recording area. The positioning protrusion and recess are
By providing the recording auxiliary sheet 3 at least at two or more locations and thereby positioning the recording auxiliary sheet 3, the sticking position of the recording auxiliary sheet 3 can be uniquely determined.

The optical disc 1 having the above-described structure is, for example, C
The recording medium is rotated by LV (constant linear velocity), and as shown in FIG. 3, during recording, a light beam having a wavelength of about 780 nm is condensed by the objective lens 25 having a numerical aperture of about 0.45 from the recording auxiliary sheet 3 side. Is irradiated. Then, the light beam passes through the land 16 of the recording auxiliary sheet 3, further passes through the substrate 11, and is applied to the recording layer 12. The light beam decomposes the organic dye forming the organic dye material layer 12a to form pits to record data, and is reflected by the reflective layer 12b. The returning light beam reflected by the reflection layer 12b passes through the substrate 11 and the recording auxiliary sheet 3, and is detected by the photodetector that constitutes the optical pickup. Here, the recording / reproducing apparatus detects the intensity distribution of reflected light, that is, uses a photodetector divided into two, generates a push-pull signal as a tracking control signal by the push-pull method of detecting each difference, and performs tracking. Take control. Further, the recording / reproducing apparatus extracts address information by detecting the light beam reflected by the reflection layer 12b, and records data based on this address information.

Further, in the optical disc 1, at the time of reproduction, the irradiated light beam passes through the land 16 of the recording auxiliary sheet 3,
Further, it passes through the substrate 11 and is irradiated onto the recording layer 12. Then, the light beam is reflected by the reflection layer 12b, and the substrate 11,
The light is transmitted through the recording auxiliary sheet 3 and detected by a photodetector that constitutes an optical pickup. As a result, the recording / reproducing apparatus detects the pits provided in the recording layer 12 and reads the data. At the time of reproduction, since the recording layer 12 is already provided with a pit pattern formed by decomposing the organic dye material layer 12a, tracking servo control, rotation servo control,
Address information can be extracted and the pattern of lands and grooves is not necessary. Therefore, the optical disc 1 from which the recording auxiliary sheet 3 has been peeled off is loaded into the recording / reproducing apparatus,
Data may be reproduced.

In the optical disc 1 as described above, the land and the groove, which are the concavo-convex pattern provided on the substrate of the conventional compact disc, are constructed in a pseudo manner with the pattern printed on the recording auxiliary sheet 3. Therefore, the existing recording / reproducing apparatus can be used for recording / reproducing. When manufacturing the optical disc 1, it is not necessary to use a stamper for forming a concavo-convex pattern composed of lands and grooves on the substrate as in the conventional case, and instead, the pattern can be printed on the recording auxiliary sheet 3. Therefore, the manufacturing becomes easy, and the manufacturing efficiency can be improved. Further, when the recording format is different, it can be dealt with only by changing the pattern of the recording auxiliary sheet 3. Further, when the recording auxiliary sheet 3 is peeled from the substrate 11 and data is reproduced, since there is no land or groove pattern, crosstalk noise due to the land or groove pattern can be reduced or eliminated.

Next, another example of the optical disk to which the present invention is applied will be described. As shown in FIG. 9, the optical disc 31 is formed by adhering substrates having a thickness of 0.6 mm, and is formed so that the total thickness is approximately 1.2 mm.

Specifically, the optical disc 31 has a first substrate 32 and a second substrate 33, as shown in FIG.

The first substrate 32 is a glass substrate, a synthetic resin substrate molded by injection molding of a synthetic resin such as polycarbonate, and is made of an optical material so that the light beam emitted from the optical pickup can be transmitted during recording and reproduction. It is formed to be transparent. The second substrate 33 is formed of a synthetic resin substrate formed by injection molding a synthetic resin such as a glass substrate or polycarbonate. For example,
Each of the substrates 32 and 33 has the same thickness as that of the compact disc when bonded, and is formed to have a thickness of approximately 0.6 mm so that compatibility can be maintained. The first substrate 32 is a substrate on which a recording layer is provided, and one surface on which the recording layer is provided is formed flat. That is, no land, groove, or pit pattern is provided on one surface of the first substrate 32. The first substrate 32 is provided with the recording layer 34 and the like on one surface side, and the other surface is a surface to which the recording auxiliary sheet 3 is attached. The second substrate 33 is a flat substrate on both sides of which a recording layer and the like are not provided, and is a protective substrate for protecting the first substrate 32 provided with the recording layer 34.

A recording layer 34 for recording data is provided on one surface of the first substrate 32. The recording layer 34 is composed of a phase change material layer 34a formed on one surface of the first substrate 32 by spin coating or the like, and a reflective layer 34b provided on the phase change material layer 34a. ing. Here, since the optical disc 31 is a rewritable type, the phase change material layer 34a is provided on the recording layer 34. However, in the present invention, when the optical disc 31 is a write-once type, the recording layer 34 has an organic dye material layer. And a magneto-optical recording layer may be provided on the recording layer 34 at the time of magneto-optical recording.

The first substrate 3 is formed on the phase change material layer 34a.
A reflection layer 34b that reflects the light beam incident on the second light source 2 is formed. The reflective layer 34b is formed on the phase change material layer 34a by vapor deposition or the like using a metal material such as aluminum, gold, or silver that can obtain a necessary reflection amount at the time of recording / reproducing.

Further, the reflection layer 34b constituting the recording layer 34
A protective layer 35 for protecting the recording layer 34 from a chemical attack when the substrates are bonded together is formed on the upper surface. The protective layer 35 is formed, for example, by applying an ultraviolet curable resin on the reflective layer 34b by spin coating and irradiating with ultraviolet light.

The first substrate 32 provided with the recording layer 34 and the second substrate 33, which is a protective substrate, are bonded to each other via the adhesive layer 36. The adhesive layer 36 is made of a material that is not easily softened even in a high temperature environment.
Cationic UV materials, adhesive sheets, etc. are used. And the 1st board | substrate 32 and the 2nd board | substrate 33 in which the recording layer 34 was provided are pressure-bonded using a pressure bonding roller etc., for example.
As with the optical disc 1, the other surface of the first substrate 32 and the recording auxiliary sheet 3 are provided with positioning protrusions or recesses so that the attaching position can be easily determined. Good.

Then, on the other surface of the first substrate 32,
The recording auxiliary sheet 3 shown in FIGS. 4 to 7 is attached. Note that, here, the recording auxiliary sheet 3 has the same configuration as the recording auxiliary sheet 3 of the optical disc 1 described above, and thus detailed description thereof will be omitted. In addition, an example in which the recording auxiliary sheet to be attached to the other surface of the first substrate 32 shown in FIG. 5 is used will be described below.

As shown in FIG. 1, when the recording auxiliary sheet 3 is attached to the other surface of the first substrate 32 in a factory or the like, the adhesive 22 is applied to the other surface of the first substrate 32. After this, the recording auxiliary sheet 3 is attached. This bonding is performed by bonding the recording auxiliary sheet 3 to the other surface of the first substrate 32 and then pressing the recording auxiliary sheet 3 to the other surface of the first substrate 32 by pressure bonding with a pressure roller. Done. After that, the first substrate 32 to which the recording auxiliary sheet 3 has been attached is subjected to a defoaming process under reduced pressure in order to remove the air bubbles mixed in at the time of attaching. After that, when a UV-curable adhesive is used, it is irradiated with ultraviolet rays to cure the adhesive. Also, as shown in FIG.
When the record carrier 2 and the recording auxiliary sheet 3 are separately distributed to the user, an adhesive 22 is applied to one surface of the recording auxiliary sheet 3 as shown in FIG. The release sheet 23 is attached to the sheet and the sheet is distributed to users. Then, the user peels off the release sheet 23 to expose the adhesive 22 and attaches it to the other surface of the first substrate 32.

The optical disc 31 as described above is, for example, Z
As shown in FIG. 9, the recording medium is rotated by a CLV (zoned constant linear velocity), and at the time of recording, a light beam having a wavelength of about 650 nm is condensed by the objective lens 37 having a numerical aperture of about 0.6 from the recording auxiliary sheet 3 side. And is irradiated.
Then, the light beam passes through the land 17 of the recording auxiliary sheet 3, further passes through the first substrate 32, and is applied to the recording layer 34. The light beam records data by changing the phase of the phase change material layer 34a to form pits, and
It is reflected by the reflective layer 34b. The returning light beam reflected by the reflection layer 34b is reflected by the first substrate 32 and the recording auxiliary sheet 3
And is detected by the photodetector that constitutes the optical pickup. Here, the recording / reproducing apparatus performs tracking servo control by detecting the difference in the amount of reflected light when passing through each pit in the address area, and also generates a clock from the pit pattern 19. In addition, the recording / reproducing apparatus uses the reflective layer 3 in the area where the pit pattern 19 is provided.
Address information is extracted by detecting the light beam reflected by 4b, and data is recorded based on this address information.

During reproduction, the optical beam emitted from the optical disc 31 is transmitted through the land 17 of the recording auxiliary sheet 3 and further through the first substrate 32, and is then irradiated onto the recording layer 34. Then, the light beam is reflected by the reflection layer 32b,
The light is transmitted through the first substrate 32 and the recording auxiliary sheet 3, and is detected by a photodetector that constitutes an optical pickup. As a result, the recording / reproducing apparatus detects the pits provided in the recording layer 34 and reads the data.

In the optical disc 31 as described above, the land and groove, which are the concavo-convex pattern provided on the conventional DVD substrate, are pseudo-configured by the pattern printed on the recording auxiliary sheet 3. Therefore, recording / reproducing can be performed using the existing recording / reproducing apparatus.
When manufacturing the optical disc 31, it is not necessary to use a stamper for forming a concavo-convex pattern including lands and grooves on a substrate as in the conventional case, and instead, a pattern can be printed on the recording auxiliary sheet 3. Therefore, the manufacturing becomes easy, and the manufacturing efficiency can be improved. Further, when the recording format is different, it can be dealt with only by changing the pattern of the recording auxiliary sheet 3.

Although the optical disc 31 has a recording layer provided on the first substrate 32 side, as shown in FIG. 10, the recording layer has a second substrate in addition to the first substrate 32. Board 3
3 may be provided.

That is, the second substrate 33 is provided with the recording layer 38 including the phase change material layer 38a and the reflective layer 38b on one surface thereof on the one surface, and on the recording layer 38. Is provided with a protective layer 39. Such a second substrate 33 has a surface on which the protective layer 39 is provided as a bonding surface,
The surface of the first substrate 32 on which the protective layer 35 is provided and the adhesive layer 3
The first substrate 32 provided with the recording layer 34 and the second substrate 33 provided with the recording layer 38, which are joined together via 6,
It constitutes a record carrier. Then, for example, the recording auxiliary sheet 3 shown in FIG. 5 is joined to the other surface of the first substrate 32 and the other surface of the second substrate 33, which are the light beam irradiation surface side.

The optical disc 31 constructed as described above
When recording data on the recording layer 34 on the first substrate 32 side, a light beam is emitted from the recording auxiliary sheet 3 side joined to the first substrate 32, and recording on the second substrate 33 side is performed. When recording data on the layer 38, a light beam is emitted from the side of the recording auxiliary sheet 3 joined to the second substrate 33.

In the optical disc 31 shown in FIGS. 9 and 10, an example in which one recording layer is provided on the first substrate 32 or the second substrate 33 has been described, but it is provided on each substrate 32, 33. A plurality of recording layers may be laminated and provided.

Further, another example of the optical disc to which the present invention is applied will be described. As shown in FIG. 11, an optical disc 41 to which the present invention is applied has a substrate 42 and a recording layer 43 provided on one surface of the substrate 42, and the recording auxiliary sheet 3 is provided on the recording layer 43. The recording auxiliary sheet 3 is joined and the light beam is emitted from the recording auxiliary sheet 3 side.

The substrate 42 is a synthetic resin substrate molded by an injection molding machine. Unlike the optical discs 1 and 31 described above, the substrate 42 does not transmit a light beam, and thus does not necessarily have to be light transmissive. One side of the substrate 42 is the surface on which the recording layer 43 is provided, and is formed flat. That is, no land, groove, or pit pattern is provided on one surface of the substrate 42.

On one surface of the substrate 42, a reflecting layer 43a for reflecting the irradiated light beam is formed.
The reflection layer 43a is formed on one surface of the substrate 42 by vapor deposition or the like using a metal material such as aluminum, gold, or silver that can obtain a necessary reflection amount during recording and reproduction.

A phase change material layer 43b is formed on the reflective layer 43a by spin coating or the like. Here, since the optical disc 41 is a rewritable type, the phase change material layer 43b is provided on the recording layer 43. However, in the present invention, when the write-once type, the recording layer 43 is
An organic dye material layer may be provided, and at the time of magneto-optical recording, the recording layer 43 may be provided with a magneto-optical recording layer.

The substrate 4 provided with the recording layer 43 in this way
The recording auxiliary sheet 3 described above is joined onto the sheet 2. That is, the recording auxiliary sheet 3 is bonded to the recording layer 43 with a light-transmissive adhesive. The recording auxiliary sheet 3 used here has a thickness of, for example, about 0.1 mm.
Note that, here, since the recording auxiliary sheet 3 has the same configuration as the recording auxiliary sheet 3 of the optical discs 1 and 31 described above, details thereof will be omitted.

As shown in FIG. 1, when the recording auxiliary sheet 3 is attached to the other surface of the substrate 42 in a factory or the like, the adhesive 22 is applied to the other surface of the substrate 42, and then the recording is performed. The auxiliary sheet 3 is attached. This bonding is performed by bonding the recording auxiliary sheet 3 to the other surface of the substrate 42 and then pressing the recording auxiliary sheet 3 against the other surface of the substrate 42 by pressure bonding with a pressure roller. After this, the substrate 4 on which the recording auxiliary sheet 3 is bonded
In the case of No. 2, the bubbles mixed during the bonding are removed, so that the defoaming process is performed under reduced pressure. After that, when a UV-curable adhesive is used, it is irradiated with ultraviolet rays to cure the adhesive. Further, as shown in FIG. 2, when the record carrier 2 and the recording auxiliary sheet 3 are separately distributed to the user,
As shown in FIG. 8, the adhesive 22 is applied to one surface of the recording auxiliary sheet 3, and the release sheet 2 is further applied on the adhesive 22.
3 is pasted together and distributed to users.

In this optical disc 41, an adhesive 22 such as a light-transmitting ultraviolet-curing adhesive, infrared-curing adhesive, or pressure-sensitive adhesive is applied to one surface of the recording auxiliary sheet 3.
This is attached onto the recording layer 43.

The optical disc 41 as described above has a CLV,
ZCLV, CAV (constant angular velocity), Z
As shown in FIG. 11, the recording auxiliary sheet 3 is rotated by a CAV (zoned constant angular velocity), etc.
From the side, for example, a light beam having a wavelength of about 400 nm is condensed and irradiated by the objective lens 44 having a numerical aperture of about 0.85. Then, the light beam is emitted from the land 1 of the recording auxiliary sheet 3.
The light is transmitted through the recording layer 7 and is irradiated onto the recording layer 43. The light beam records data by changing the phase of the phase change material layer 43b to form pits and is reflected by the reflection layer 43a. The returning light beam reflected by the reflection layer 43a passes through the recording auxiliary sheet 3 and is detected by the photodetector that constitutes the optical pickup. Here, the recording / reproducing apparatus performs tracking servo control by detecting the difference in the amount of reflected light when passing through each pit in the address area, and also generates a clock from the pit pattern 19. Further, the recording / reproducing apparatus extracts address information by detecting the light beam reflected by the reflection layer 34b in the area where the pit pattern 19 is provided, and records data based on this address information.

During reproduction, the optical beam emitted from the optical disc 41 passes through the lands 17 of the recording auxiliary sheet 3 and is emitted to the recording layer 43. Then, the light beam is reflected by the reflection layer 43a, transmitted through the recording auxiliary sheet 3, and detected by the photodetector constituting the optical pickup. As a result, the recording / reproducing apparatus detects the pits provided in the recording layer 43 and reads the data.

The optical disc 41 as described above has a substrate 42
It is not necessary to provide a land or groove pattern or a pit pattern on one surface, and instead, a land or groove is artificially provided by a pattern printed on the recording auxiliary sheet 3, so that it is possible to use the conventional substrate. Since there is no need for a stamper for transferring the concavo-convex pattern at the time of molding, manufacturing can be facilitated and manufacturing efficiency can be improved. Further, when the recording format is different, it can be dealt with only by changing the pattern of the recording auxiliary sheet 3.

Next, the optical discs 1, 31,
The recording / reproducing apparatus 50 of No. 41 will be described with reference to FIG. The recording / reproducing apparatus 50 includes an error correction coding unit 51 that adds an error correction code to data to be recorded.
A modulation unit 52 that performs a modulation process on the data that has been subjected to the error correction coding process, and a recording processing unit 53 that performs a recording process for recording the data on the optical discs 1, 31, 41.
And an optical pickup 5 for detecting the returning light beam emitted from the optical discs 1, 31, 41 and reflected.
4 and a motor 55 for rotating the optical disks 1, 31, 41
An RF amplifier 56 that generates an RF signal or the like from the output from the optical pickup 54, a servo control unit 57 that performs focusing control, tracking control of the optical pickup 54, and rotation control of the motor 55, and an RF amplifier 56. A demodulation unit 58 that demodulates the RF signal and an error correction processing unit 59 that performs error correction processing on the demodulated data are provided.

The error correction coding unit 51 uses the input terminal 6 according to the type of 1, 31, 41 of the loaded optical disk.
Digital data is cross-interleaved Reed-Solomon encoded (Cross
s Interleave Reed-solomon Code (CIRC), Reed-Solomon product coding, and other error correction coding processing, and the error-corrected coding data is output to the modulation unit 52.

The modulation section 52 includes the loaded optical discs 1,
8-14 modulation processing is performed on the data input from the error correction coding unit 51 according to the types of 31 and 41, 8-1
Modulation processing such as 6-modulation processing and run-length limited modulation is performed and output to the recording processing unit 53. Recording processing unit 53
NRZ (Non return to Zoro), NRZI (Non re to
turn to Zoro Inverted) and recording compensation processing, and outputs to the optical pickup 54.

The optical pickup 54 is a semiconductor laser that emits a light beam that emits a wavelength corresponding to the type of the loaded optical disc, and the types of the optical discs 1, 31, and 41 that focus the light beam emitted from this semiconductor laser. It is provided with an objective lens having a corresponding numerical aperture, a photodetector for detecting the returning light beam reflected by the optical disks 1, 31, 41. The light beam emitted from the semiconductor laser is focused by the objective lens and applied to the recording layers 12, 34, 43 of the optical discs 1, 31, 41. In addition, the optical disc 1,
The returning light beam reflected by the reflecting layers 12b, 34b, 43a of 31, 41 is converted into an electric signal by the photodetector, and the photodetector outputs this electric signal to the RF amplifier 56. That is, in the optical pickup 54, the amount of reflected light at the portion where the pattern of the recording auxiliary sheet 3 is printed is reduced,
By detecting the signal based on the difference in the amount of light from the land of this portion, the signal is detected as in the case of the conventional optical disc provided with the concavo-convex pattern.

Further, the objective lens is held by an objective lens driving mechanism such as a biaxial actuator, and is driven and displaced in a focusing direction parallel to the optical axis of the objective lens and a tracking direction orthogonal to the optical axis of the objective lens.

The output shaft of the motor 55 is integrally provided with a disk table which is engaged with the center hole of the optical disk, and rotates the optical disks 1, 31, 41 at a predetermined rotation speed.

The RF amplifier 56 generates an RF signal, a focusing error signal, and a push-pull signal used for tracking control, etc., based on the output signal from the photodetector that constitutes the optical pickup 54. For example, the focusing error signal is generated by the astigmatism method or the like, and the tracking error signal is generated by the 3-beam method or the push-pull method. Then, the RF amplifier 56 outputs the focusing error signal and the tracking error signal to the servo control unit 57.

The servo control unit 57 generates a focusing servo signal based on the focusing error signal input from the RF amplifier 56, and outputs this focusing servo signal to the drive circuit of the objective lens drive mechanism of the optical pickup 54. The servo controller 57 also generates a tracking servo signal based on the tracking error signal input from the RF amplifier 56, and outputs this tracking servo signal to the drive circuit of the objective lens drive mechanism of the optical pickup 54. Further, the servo control unit 57 synchronizes the clock extracted from the optical discs 1, 31, 41 with the reference clock from the crystal oscillator and the frequency and phase, and based on this, the rotation servo of the motor 55 according to the type of the optical disc. Take control.

Specifically, when the recording auxiliary sheet 3 shown in FIG. 4 is used, the servo control unit 57 performs tracking servo control by the component obtained by removing the wobble component from the push-pull signal during recording, Address information is extracted by demodulating the wobble component extracted from the pull signal. Further, the servo control unit 57 generates a clock from this wobble component and performs rotation servo control so as to drive the motor 55 by a predetermined method. Then, the servo control unit 57 enables the optical pickup 54 to specify the recording position by the address information. Further, the servo control unit 57 extracts address information from the subcode of the recorded data and the like at the time of reproduction, generates a clock from the synchronization signal, and performs rotation servo control of the motor 55 by a predetermined method.

Further, when the recording auxiliary sheet 3 shown in FIG. 5 is used, the servo control unit 57 generates a clock from the pits used for clock generation in the pit pattern 19 to rotate the motor 55. In addition to the control, tracking servo control is performed by detecting the difference in the amount of reflected light when passing through each pit. And
The servo control unit 57 enables the optical pickup 54 to specify the recording position and the reproducing position by this address information, record the data, or reproduce the data.

Further, when the recording auxiliary sheet 3 shown in FIG. 6 is used, the servo control unit 57 generates a clock by the pits 21a, and also the pits 21a, 21
Tracking servo control is performed by detecting the difference in the amount of reflected light of b, and a data area between sample servo areas is irradiated with a light beam to record data and the recorded data is read.

The demodulation section 58 performs demodulation processing according to the modulation method at the time of recording and outputs it to the error correction processing section 59. The error correction processing unit 59 performs error correction decoding processing based on the error correction code and outputs it to the output terminal 62.

The recording operation of the recording / reproducing apparatus 51 as described above will be explained. When the recording button constituting the operation section is operated by the user and the recording data is inputted from the input terminal 61, this data is converted into an error correction code. The error correction coding process according to the type of the optical disc is performed by the conversion unit 51, the modulation process according to the type of the optical disc is performed by the modulation unit 52, and the recording process is performed by the recording processing unit 53. It is input to the pickup 54. Then, the optical pickup 54 irradiates a light beam of a predetermined wavelength from a semiconductor laser according to the type of the optical disc,
The recording layers 12, 34 and 43 of the optical discs 31, 41 are irradiated and the reflective layers 12b, 34 of the optical discs 1, 31, 41 are irradiated.
The returning light beam reflected by b and 43a is detected by a photodetector, photoelectrically converted, and output to the RF amplifier 56.

Then, the RF amplifier 56 generates a focusing error signal, a tracking error signal and an RF signal. The servo control unit 57 generates a focusing servo signal or a tracking servo signal based on the focusing error signal or the tracking error signal input from the RF amplifier 56, and outputs these signals to a drive circuit of the objective lens drive mechanism of the optical pickup 54. Output. As a result, the objective lens held by the objective lens drive mechanism is driven and displaced in the focusing direction parallel to the optical axis of the objective lens and in the tracking direction orthogonal to the optical axis of the objective lens based on the focusing servo signal and the tracking servo signal. To be done. Further, the servo control unit 57 generates a rotation servo signal so that the clock generated from the wobble component of the groove or the pit for the address is synchronized with the reference clock from the crystal oscillator in frequency and phase, and based on this, the motor 55 is rotated. Rotates the optical discs 1, 31, 41. Furthermore, from the RF signal, wobbled groove 1
Address information is extracted from 5, 18 and pit patterns 19, 21 and the like. The optical pickup 54 includes a recording processing unit 5
In order to record the data subjected to the recording processing in 3, the predetermined address is accessed based on the extracted address information, and the light beam is irradiated to record the data.

Next, the reproducing operation of the recording / reproducing apparatus 50 will be described. When the reproducing button constituting the operation section is operated by the user, the optical pickup 54 changes according to the type of the optical disk as in the recording operation. A light beam of a predetermined wavelength from a semiconductor laser,
The recording layers 12, 34 and 43 of the optical disc 41 are irradiated and the reflective layers 12b, 34b and 43a of the optical discs 1, 31 and 41 are irradiated.
The returning light beam reflected by is detected by a photodetector, photoelectrically converted and output to the RF amplifier 56.

The RF amplifier 56 produces a focusing error signal, a tracking error signal and an RF signal.
The servo control unit 57 generates a focusing servo signal and a tracking servo signal based on the focusing error signal and the tracking error signal input from the RF amplifier 56, and performs focusing control and tracking control of the objective lens based on these signals. . Further, the servo control unit 57 generates a rotation servo signal so that the clock generated from the wobble component of the groove or the pit for the address is synchronized with the reference clock from the crystal oscillator in frequency and phase, and based on this, the motor 55 is rotated. Rotates the optical discs 1, 31, 41. Furthermore, from the RF signal,
Wobbled grooves 15, 18 and pit pattern 1
Address information is extracted from 9, 21, and the like. Since the optical pickup 54 reads out predetermined data, it accesses a predetermined address based on the extracted address information and irradiates a light beam to read the data.

In the case of the optical disc 1, when the recording auxiliary sheet 3 is peeled and reproduced, the CLV servo is performed based on the sync signal of the recording data.
The address information may be extracted from the subcode.

The RF signal generated by the RF amplifier 56 is
The demodulation section 58 performs demodulation processing in accordance with the modulation method at the time of recording, then the error correction processing section 59 performs error correction decoding processing, and the result is output from the output terminal 62. After that, the data output from the output terminal 62 is digitally output as it is, or converted from a digital signal to an analog signal by, for example, a D / A converter and output to a speaker, a monitor, or the like.

The recording / reproducing apparatus 50 as described above can record / reproduce data by using the pattern printed on the recording auxiliary sheet 3 as a guide when recording / reproducing the above-mentioned optical disks 1, 31, 41. That is, the recording / reproducing apparatus 50 regards the portion of the recording auxiliary sheet 3 on which the pattern is printed as a pseudo recessed portion provided with pits and grooves, and the portion on which the pattern is not printed is referred to as a projected portion provided with lands. Assuming this, tracking servo control, rotation servo control, etc. can be performed. Further, since the recording / reproducing apparatus 50 is configured to artificially regard the presence or absence of the pattern of the recording auxiliary sheet 3 as the land groove pattern or the pit pattern, the land groove pattern or the pit pattern is provided by the conventional concavo-convex pattern. It is also possible to perform recording and reproduction of an optical disc.

[0090]

According to the present invention, it is possible to record and reproduce data by using the pattern printed on the recording auxiliary sheet as a guide. Therefore, according to the present invention, it is possible to record and reproduce the data recording medium using the existing recording and reproducing apparatus. When manufacturing a data recording medium, it is not necessary to use a stamper for forming a concavo-convex pattern composed of lands and grooves on a substrate as in the conventional case, and instead a pattern can be printed on a recording auxiliary sheet, Manufacturing is facilitated and manufacturing efficiency can be improved. Further, when the recording format is different, it can be dealt with only by changing the pattern of the recording auxiliary sheet.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a usage mode of an optical disc to which the present invention is applied, and is a diagram illustrating a process of attaching a recording auxiliary sheet to a record carrier in a factory or the like.

FIG. 2 is a diagram illustrating a usage mode of an optical disc to which the present invention is applied, and a diagram illustrating a case where a recording auxiliary sheet is attached to a record carrier by a user's hand.

FIG. 3 is a cross-sectional view of an optical disc to which the present invention has been applied.

FIG. 4 is a diagram illustrating an example in which a wobbled groove pattern is printed on a recording auxiliary sheet to which the present invention is applied.

FIG. 5 is a diagram illustrating an example in which address pits and straight groove patterns are printed on a recording auxiliary sheet to which the present invention is applied.

FIG. 6 is a diagram illustrating an example in which a pit pattern for clock generation is printed on a recording auxiliary sheet to which the present invention is applied.

FIG. 7 is a diagram illustrating an example in which a pit pattern is printed on the inner peripheral side and a groove pattern is printed on the outer peripheral side of a recording auxiliary sheet to which the present invention is applied.

FIG. 8 is a cross-sectional view of a recording auxiliary sheet before being joined to a record carrier.

FIG. 9 is a cross-sectional view of an optical disc to which the present invention is applied, which is configured by bonding substrates.

FIG. 10 is a cross-sectional view of an optical disc to which the present invention is applied, in which substrates are laminated and a recording layer is provided on each substrate.

FIG. 11 is a cross-sectional view of an optical disc to which the present invention is applied, in which a recording layer is laminated on a substrate.

FIG. 12 shows an optical disc recording / reproducing apparatus to which the present invention is applied.

[Explanation of symbols]

1 optical disk, 2 record carrier, 3 recording auxiliary sheet,
11 substrate, 12 recording layer, 12a organic dye material layer,
12b reflective layer, 13 protective layer, 15 wobbled groove, 17 land, 18 groove, 19 pit pattern, 20 center hole, 21 pit pattern, 22
Adhesive, 23 release sheet, 24 pit pattern, 2
5 Objective lens

─────────────────────────────────────────────────── ─── Continued Front Page (51) Int.Cl. ⁷ Identification Code FI Theme Coat (Reference) G11B 7/24 571 G11B 7/24 571B 7/0045 7/0045 D 7/007 7/007 7/09 7 / 09 C 7/26 7/26 531 531 11/105 531 11/105 531X F-term (reference) 5D029 HA06 JA01 JA04 JB13 LB17 LC30 NA12 NA17 NA30 RA16 5D075 EE03 FF12 FG01 FG04 FG05 GG10 FG11 5D090 BB03 BB05 BB07 BB05 BB05 BB05 BB05 BB05 BB05 BB05 BB05 GG01 GG22 GG40 5D118 AA06 BB03 BB05 BC04 5D121 AA04 AA07 EE30 FF15

Claims (85)

[Claims] 1. A record carrier in which a recording layer capable of recording by irradiation of a light beam is provided on one surface of a light-transmitting substrate, and a light-transmitting record in which a pattern for guiding data recording is printed. A data recording medium comprising an auxiliary sheet, wherein the recording auxiliary sheet is bonded to the light beam irradiation surface side of the substrate. 2. The recording layer comprises a phase change material layer, an organic dye material layer or a magneto-optical recording material layer provided on a substrate, and a reflective layer provided on the layer and reflecting an irradiated light beam. The data recording medium according to claim 1, comprising: 3. The data recording medium according to claim 1, wherein the guide pattern for recording the data is formed in a wobbled groove shape, a straight groove shape, or a pit shape. 4. The data recording according to claim 1, wherein the guide pattern for recording the data is at least one of a tracking control pattern, a focusing control pattern, a clock generation pattern, and an addressing pattern. Medium. 5. The data recording medium according to claim 1, wherein a recording pattern as recording data is further printed on the recording auxiliary sheet. 6. The data recording medium according to claim 1, wherein the recording auxiliary sheet is transparent or translucent. 7. The data recording medium according to claim 1, wherein the sheet body is in the form of a film. 8. The data recording medium according to claim 1, wherein the printing is any one of monochrome printing, ultraviolet cut printing, and infrared cut printing. 9. The bonding surface of the substrate with the recording auxiliary sheet and the bonding surface of the recording auxiliary sheet with the substrate are
The data recording medium according to claim 1, further comprising a positioning portion for positioning the joining position. 10. A recording auxiliary sheet joined to a record carrier having a recording layer capable of recording by irradiation of a light beam on one surface of a light-transmissive substrate, the sheet being a guide for recording data. A recording auxiliary sheet, which has a pattern for printing and is joined to the light beam irradiation surface side of the substrate. 11. The recording auxiliary sheet according to claim 10, wherein the guide pattern for recording the data is formed in a wobbled groove shape, a straight groove shape, or a pit shape. 12. The guide pattern for recording the data is at least one of a tracking control pattern, a focusing control pattern, a clock generation pattern, and an addressing pattern.
0 recording assist sheet. 13. The recording auxiliary sheet according to claim 10, wherein a recording pattern as recording data is further printed on the sheet body. 14. The recording auxiliary sheet according to claim 10, wherein the sheet body is transparent or translucent. 15. The recording auxiliary sheet according to claim 10, wherein the sheet body is in the form of a film. 16. The printing is any one of monochrome printing, ultraviolet cut printing, and infrared cut printing.
Recording assistance sheet described. 17. The recording auxiliary sheet according to claim 10, wherein a positioning portion for positioning a bonding position with the substrate is provided on a bonding surface of the sheet body with the substrate. 18. A recording layer capable of recording by irradiation with a light beam is provided on one surface of a light transmissive substrate, and a pattern for guiding data recording is printed on the light beam irradiation surface side of the substrate. Record carrier to which the recorded light-transmissive recording auxiliary sheet is joined. 19. The recording layer comprises a phase change material layer, an organic dye material layer or a magneto-optical recording material layer provided on a substrate.
19. The record carrier according to claim 18, comprising a reflective layer provided on this layer to reflect the irradiated light beam. 20. The record carrier according to claim 18, wherein a positioning portion for positioning a joining position with the recording auxiliary sheet is provided on a joining surface of the substrate with the recording auxiliary sheet. 21. A step of manufacturing a record carrier by forming a recordable recording layer by irradiation of a light beam on one surface of a light transmissive substrate, and a guide for recording data on a light transmissive recording auxiliary sheet. A method of manufacturing a data recording medium, comprising: a step of printing the pattern to produce a recording auxiliary sheet; and a step of bonding the recording auxiliary sheet to the light beam irradiation surface side of the substrate. 22. The recording layer, wherein a phase change material layer, an organic dye material layer or a magneto-optical recording material layer is provided on the substrate,
22. The method for manufacturing a data recording medium according to claim 21, wherein a reflective layer that reflects the irradiated light beam is provided on the layer. 23. The method for manufacturing a data recording medium according to claim 21, wherein the guide pattern for recording data on the recording auxiliary sheet is formed by any one of monochrome printing, ultraviolet cut printing and infrared cut printing. 24. The substrate and the recording auxiliary sheet,
22. The method of manufacturing a data recording medium according to claim 21, wherein the joining positions are joined and positioned by the positioning portions provided on the surfaces facing each other. 25. A pattern for guiding data recording on a light-beam-irradiated surface side of the substrate of a record carrier having a recording layer capable of recording by irradiation of a light beam on one surface of a light-transmissive substrate. A data recording medium to which a light-transmissive recording auxiliary sheet on which is printed is attached is mounted, and driving means for driving the data recording medium, and a light beam is applied to the data recording medium driven by the driving means. A recording means for recording data on the recording layer by irradiating and detecting the light beam reflected by the reflection layer, wherein the recording means is formed by a guide pattern for recording data on the recording auxiliary sheet. Data recording device for tracking servo control. 26. A pattern for guiding data recording on the light beam irradiation surface side of the substrate of a record carrier having a recording layer capable of recording by irradiation of a light beam on one surface of a light transmissive substrate. The data recording medium on which the light-transmissive recording auxiliary sheet on which is printed is joined is driven, a light beam is applied to the data recording medium, and the light beam reflected by the reflective layer is detected. A data recording method in which tracking servo control is performed using a guide pattern when recording data on a sheet. 27. A light-transmissive first substrate having a recording layer which is recordable by irradiation of a light beam on one surface thereof;
A record carrier including a second substrate bonded to the first substrate with the one surface side being a bonding surface, and a light-transmissive recording auxiliary sheet on which a pattern for guiding data recording is printed. A data recording medium comprising: the recording auxiliary sheet, which is joined to the light beam irradiation surface side of the record carrier. 28. The recording layer comprises a phase change material layer, an organic dye material layer or a magneto-optical recording material layer provided on the first substrate, and an irradiation light beam provided on the layer. 28. The data recording medium according to claim 27, comprising a reflective layer that reflects light. 29. The data recording medium according to claim 27, wherein a further recording layer capable of recording by irradiation of a light beam is provided on a surface of the second substrate which is on the side of the bonding surface with the first substrate. . 30. The data recording medium according to claim 27, wherein a plurality of the recording layers provided on at least one substrate are laminated and provided. 31. The data recording medium according to claim 27, wherein the guide pattern for recording the data is formed in a wobbled groove shape, a straight groove shape, or a pit shape. 32. The guide pattern for recording the data is at least one of a tracking control pattern, a focusing control pattern, a clock generation pattern, and an addressing pattern.
7. The data recording medium according to 7. 33. A recording pattern as recording data is further printed on the recording auxiliary sheet.
7. The data recording medium according to 7. 34. The data recording medium according to claim 27, wherein the recording auxiliary sheet is transparent or translucent. 35. The data recording medium according to claim 27, wherein the sheet body is in the form of a film. 36. The printing is any one of monochrome printing, ultraviolet cut printing, and infrared cut printing.
The data recording medium described. 37. A positioning part for positioning a bonding position is provided on a bonding surface of the substrate with the recording auxiliary sheet and a bonding surface of the recording auxiliary sheet with the substrate. Data recording medium. 38. A first substrate in which a recording layer capable of recording by irradiation of a light beam is provided on one surface of a light transmissive substrate, and the one surface side is bonded to the first substrate. A recording auxiliary sheet to be joined to a record carrier composed of a second substrate which is laminated as a substrate, wherein a pattern for guiding data recording is printed on the sheet body, and the light beam irradiation surface of the record carrier Recording auxiliary sheet that is joined to the side. 39. The recording auxiliary sheet according to claim 39, wherein the guide pattern for recording the data is formed in a wobbled groove shape, a straight groove shape, or a pit shape. 40. The guide pattern for recording the data is at least one of a tracking control pattern, a focusing control pattern, a clock generation pattern, and an addressing pattern.
8 is a recording auxiliary sheet. 41. The recording auxiliary sheet according to claim 38, wherein a recording pattern as recording data is further printed on the sheet body. 42. The recording auxiliary sheet according to claim 38, wherein the sheet body is transparent or translucent. 43. The recording auxiliary sheet according to claim 38, wherein the sheet body is in the form of a film. 44. The printing is any one of monochrome printing, ultraviolet cut printing, and infrared cut printing.
Recording assistance sheet described. 45. The recording auxiliary sheet according to claim 38, wherein a positioning portion for positioning a bonding position with the substrate is provided on a bonding surface of the sheet body with the substrate. 46. When a further recording layer capable of recording by irradiation of a light beam is provided on the surface of the second substrate which is on the side of the surface to be joined with the first substrate, the recording layer of each substrate is provided. 39. The recording auxiliary sheet according to claim 38, which is joined to a surface on the side opposite to the formed surface. 47. A second substrate is bonded to the one surface side of the first substrate having a recording layer capable of recording by irradiation of a light beam on one surface of the light transmissive substrate. ,
A record carrier in which a light-transmissive recording auxiliary sheet on which a guide pattern for recording data is printed is joined to the light beam irradiation surface side of the substrate. 48. The recording layer comprises a phase change material layer, an organic dye material layer or a magneto-optical recording material layer provided on the substrate, and a reflection layer provided on the layer for reflecting an irradiated light beam. 49. The record carrier of claim 48, which comprises a layer. 49. The record carrier according to claim 47, wherein a further recording layer capable of recording by irradiation of a light beam is provided on the surface of the second substrate which is on the side of the bonding surface with the first substrate. 50. The record carrier according to claim 47, wherein a plurality of the recording layers provided on at least one substrate are provided in a stacked manner. 51. The recording auxiliary sheet is bonded to the surface of each substrate opposite to the surface provided with the recording layer.
9. The record carrier according to item 9. 52. A second substrate is joined to the one surface side of the first substrate having a recording layer capable of recording by irradiation of a light beam on one surface of the light transmissive substrate, and a second substrate is bonded to the record carrier. And a step of manufacturing a recording auxiliary sheet by printing a pattern for guiding data recording on a light-transmissive sheet body, and the recording auxiliary sheet on the light beam irradiation surface side of the record carrier. A method of manufacturing a data recording medium, which comprises a step of joining. 53. The recording layer, wherein a phase change material layer, an organic dye material layer or a magneto-optical recording material layer is provided on the substrate,
53. The method for manufacturing a data recording medium according to claim 52, wherein a reflective layer that reflects the irradiated light beam is provided on the layer. 54. The method for manufacturing a data recording medium according to claim 52, wherein the guide pattern for recording data on the recording auxiliary sheet is formed by any one of monochrome printing, ultraviolet cut printing, and infrared cut printing. 55. The substrate and the recording auxiliary sheet,
53. The method for producing a data recording medium according to claim 52, wherein the joining positions are positioned and joined by the positioning portions provided on the surfaces facing each other. 56. A further recording layer, which is recordable by irradiation of a light beam, is provided on the surface of the second substrate on the side of the first bonding surface, and the recording layer faces the recording layer of the first substrate. 53. The method of manufacturing a data recording medium according to claim 52, wherein the data recording medium is bonded to the first substrate as described above. 57. The method of manufacturing a data recording medium according to claim 56, wherein a plurality of the recording layers provided on at least one substrate are provided in a laminated manner. 58. A second substrate is bonded to the one surface side of the first substrate, which has a recording layer recordable by irradiation of a light beam on one surface of the light transmissive substrate, A data recording medium to which a light-transmissive recording auxiliary sheet on which a pattern for guiding data is printed is joined is attached to the light beam irradiation surface side of the substrate, and a driving means for driving the data recording medium is provided. A recording means for recording data on the recording layer by irradiating the data recording medium driven by the driving means with a light beam and detecting the light beam reflected by the reflection layer, The recording means is a data recording device for performing tracking servo control by a guide pattern for recording data on the recording auxiliary sheet. 59. A second substrate is bonded to the one surface side of a first substrate having a recording layer capable of recording by irradiation of a light beam on one surface of a light transmissive substrate, and the second substrate is bonded to the one surface side. The light beam irradiation surface of the substrate is driven by a data recording medium to which a light-transmissive recording auxiliary sheet on which a pattern for data recording guide is printed is joined, A data recording method in which a light beam emitted and reflected by a reflective layer is detected, and tracking servo control is performed by a guide pattern for recording data on the recording auxiliary sheet. 60. A record carrier in which a recording layer capable of recording by irradiation of a light beam is provided on one surface of a light-transmitting substrate, and a light-transmitting record in which a pattern for guiding data recording is printed. A data recording medium comprising an auxiliary sheet, wherein the recording auxiliary sheet is bonded onto the recording layer. 61. The recording layer, which is provided on one surface of the substrate, and which reflects an irradiated light beam,
The data recording medium according to claim 60, comprising a phase change material layer, an organic dye material layer, or a magneto-optical recording material layer provided on the reflective layer. 62. The data recording medium according to claim 60, wherein the guide pattern for recording the data is formed in a wobbled groove shape, a straight groove shape, or a pit shape. 63. The guide pattern for recording the data is at least one of a tracking control pattern, a focusing control pattern, a clock generation pattern, and an addressing pattern.
A data recording medium described in 0. 64. The recording pattern as recording data is further printed on the recording auxiliary sheet.
A data recording medium described in 0. 65. The data recording medium according to claim 60, wherein the recording auxiliary sheet is transparent or translucent. 66. The data recording medium according to claim 60, wherein the sheet body is in the form of a film. 67. The printing is any one of monochrome printing, ultraviolet cut printing, and infrared cut printing.
The data recording medium described. 68. A positioning part for positioning a bonding position is provided on a bonding surface of the substrate with the recording auxiliary sheet and a bonding surface of the recording auxiliary sheet with the substrate. Data recording medium. 69. A recording auxiliary sheet joined to a record carrier having a recording layer capable of recording by irradiation of a light beam on one surface of a light transmissive substrate, the sheet being a guide for recording data. A recording auxiliary sheet, which is printed with a pattern for use and is bonded onto the recording layer of the substrate. 70. The recording auxiliary sheet according to claim 69, wherein the guide pattern for recording the data is formed in a wobbled groove shape, a straight groove shape, or a pit shape. 71. The guide pattern for recording the data is at least one of a tracking control pattern, a focusing control pattern, a clock generation pattern, and an addressing pattern.
The recording auxiliary sheet described in 9. 72. The recording auxiliary sheet according to claim 69, wherein a recording pattern as recording data is further printed on the sheet body. 73. The recording auxiliary sheet according to claim 69, wherein the sheet body is transparent or translucent. 74. The recording auxiliary sheet according to claim 69, wherein the sheet body is in the form of a film. 75. The printing is any one of monochrome printing, ultraviolet cut printing, and infrared cut printing.
Recording assistance sheet described. 76. The recording auxiliary sheet according to claim 69, wherein a positioning portion for positioning a bonding position with the substrate is provided on a bonding surface of the sheet body with the substrate. 77. A light-transmitting substrate, wherein one surface of a light-transmitting substrate is provided with a recording layer capable of recording by irradiation of a light beam, and a guide pattern for recording data is printed on the recording layer. Record carrier to which the recording auxiliary sheet of is joined. 78. The recording layer comprises a reflective layer provided on one surface of the substrate for reflecting an irradiated light beam,
A record carrier according to claim 77, comprising a phase change material layer, an organic dye material layer or a magneto-optical recording material layer provided on the reflective layer. 79. The record carrier according to claim 77, wherein a positioning portion for positioning a bonding position with the recording auxiliary sheet is provided on a bonding surface of the substrate with the recording auxiliary sheet. 80. A step of manufacturing a record carrier by forming a recording layer capable of recording by irradiation of a light beam on one surface of a light transmissive substrate, and a step of guiding a data recording on a light transmissive sheet. A method of manufacturing a data recording medium, comprising: a step of printing a pattern to manufacture a recording auxiliary sheet; and a step of bonding the recording auxiliary sheet on a recording layer of the substrate. 81. The recording layer is provided with a reflective layer that reflects an irradiated light beam on the substrate, and a phase change material layer, an organic dye material layer or a magneto-optical recording material layer is provided on the reflective layer. The method of manufacturing a data recording medium according to claim 80, wherein the method is provided and formed. 82. The method for manufacturing a data recording medium according to claim 80, wherein the guide pattern for recording data on the recording auxiliary sheet is formed by any one of monochrome printing, ultraviolet cut printing, and infrared cut printing. 83. The substrate and the recording auxiliary sheet,
81. The method for manufacturing a data recording medium according to claim 80, wherein the joining positions are positioned and joined by the positioning portions provided on the surfaces facing each other. 84. A light-transmitting substrate, wherein one surface of a light-transmitting substrate is provided with a recording layer capable of recording by irradiation of a light beam, and a pattern for guiding data recording is printed on the recording layer. The data recording medium to which the recording auxiliary sheet of is joined is mounted, and the data recording medium driven by the driving means and the driving means for driving the data recording medium is irradiated with a light beam and reflected by the reflection layer. Recording means for recording data on the recording layer by detecting the generated light beam, and the recording means performs data recording for tracking servo control by a guide pattern for recording data on the recording auxiliary sheet. apparatus. 85. A light-transmitting substrate, wherein one surface of a light-transmitting substrate is provided with a recording layer capable of recording by irradiation of a light beam, and a pattern for guiding data recording is printed on the recording layer. Driving the data recording medium to which the recording auxiliary sheet is joined, irradiating the data recording medium with a light beam, detecting the light beam reflected by the reflection layer, and guiding the data recording of the recording auxiliary sheet. Data recording method to perform tracking servo control according to the pattern for use.