WO2008041488A1

WO2008041488A1 - Testing optical disc manufacturing method, testing optical disc manufacturing apparatus and testing optical disc

Info

Publication number: WO2008041488A1
Application number: PCT/JP2007/068228
Authority: WO
Inventors: Shozo Ema; Naoharu Yanagawa; Yukio Kanamori
Original assignee: Pioneer Corporation
Priority date: 2006-09-29
Filing date: 2007-09-20
Publication date: 2008-04-10
Also published as: JP4629780B2; JPWO2008041488A1

Abstract

Provided is a testing optical disc manufacturing apparatus by which a large quantity of testing optical discs can be manufactured by using original optical discs as material. The testing optical discs meet specifications for various types of tests under desired standards even the original optical discs to be the material have variance in characteristics. The characteristics of the material optical disc are detected (step (S1)), previously specified scratches are formed on the surface (step (S3)), the characteristics of the material optical disc whereupon the scratches are formed are redetected (step (S4)), and scratches to be formed on the surface for an actual test are determined (step (S6)), based on the characteristics detected in the step (S1) and the characteristics redetected in the step (S4).

Description

Specification

Test optical disc manufacturing method, test optical disc manufacturing apparatus, and test optical disc

Technical field

The present application belongs to a technical field of a test optical disc manufacturing method, a test optical disc manufacturing apparatus, and a test optical disc, and more specifically, characteristics such as optical tolerance of an information recording device or optical information of an information reproducing device For example, a test optical disc manufacturing method for manufacturing a test optical disc for testing characteristics such as tolerance in the manufacturing stage of each device, a test optical disc manufacturing device, a test manufactured by the test optical disc manufacturing device, etc. Belongs to the technical field of optical discs.

Background art

In recent years, as a large-capacity recording medium, an optical disc such as a DVD (Digital Versatile Disc) and a high recording density optical disc having a higher recording density than the DVD has been widely used. Along with this, information recording devices for recording information on the optical disc, information reproducing devices for reproducing information from the optical disc, and the like are also generalized.

[0003] Here, the information recording apparatus or information reproducing apparatus (hereinafter referred to as an information recording apparatus or the like as appropriate) is required to have! /, Various operational tolerances (playability) for various optical disks. It is

[0004] That is, at present, the optical disc is manufactured by a plurality of domestic and foreign manufacturers, and each manufacturer manufactures the optical disc so as to conform to the physical property standards defined for the optical disc. However, even if an optical disc is manufactured in accordance with the standard, the physical properties are within that range. There is some variation in characteristics.

[0005] Further, depending on the manufacturing method in the manufacturer, an optical disk that does not exactly conform to the above-mentioned standard may be included, and in this case, the variation becomes more conspicuous.

[0006] On the other hand, even in the manufacturing stage, even an optical disc that exactly conforms to the standard is loaded or removed while the purchaser is handling it, or to the information recording device or the like. While the operation such as protrusion is repeated, various scratches and human fingerprints may adhere to the surface of the optical disk, or the entire shape of the optical disk itself may be deformed.

[0007] Therefore, the above information recording apparatus or the like presupposes to some extent the presence of an optical disk with a scratch on its surface, an optical disk that is out of specification, or a deformed optical disk due to physical characteristics. Even when an optical disk is loaded, the above-mentioned operation tolerance is required for normal operation. At this time, especially in the high recording density optical disc, the substrate thickness is about one-sixth thinner than the DVD, so that the operation resistance against scratches and fingerprints formed on the surface of the substrate in handling is high. It is demanded as a more severe condition. When manufacturing the information recording apparatus or the like, a performance test using the test optical disk with the various scratches and deformations is performed in order to confirm the presence or absence of the operation resistance.

Here, as a conventional test optical disc, for example, there is one described in Patent Document 1 below.

Patent Document 1: Japanese Patent Application Laid-Open No. 2004-95038 (FIGS. 1 to 7)

Disclosure of the invention

Problems to be solved by the invention

[0009] However, in the conventional test optical disc described above, the operating characteristics of the original optical disc itself, which is a material for producing the test optical disc, are not considered at all. There was a problem that it could not be a test optical disc with specifications that could be used for various tests below.

[0010] That is, the above-described conventional test optical disk is manufactured by artificially attaching various scratches to the surface of the original optical disk that is the material thereof. A commercially available optical disc itself is used. However, there are cases where the above-mentioned variation, deformation, etc. are already included in the optical disc itself that has been sold for the reasons described above, and the test optical disc itself manufactured using such an original optical disc as a material is used. In addition, the variation or the like is included. As a result, the test optical device has specifications that can be used for various tests under the desired standard. There is a case that is not!

[0011] In addition, when artificially forming a scratch as described in Patent Document 1 above, specifically, for example, a force that causes a scratch using a file cutting tool or the like, such a method However, due to the clogging of the file and the wear of a cutting tool, it is difficult to manufacture a large number of test optical disks on which uniform scratches are formed.

Therefore, the present application has been made in view of the above-mentioned problems, and the problem is that various tests under a desired standard can be performed even when the characteristics of the original optical disc itself that is a material vary. A test optical disc manufacturing method, a test optical disc manufacturing device, and a device that can manufacture a large amount of test optical discs with specifications that can be provided using the original optical disc as a material. To provide a test optical disc.

Means for solving the problem

[0013] In order to solve the above problems, the invention according to claim 1 is a test optical disc manufacturing method for manufacturing a test optical disc by forming a test deformation on a surface of an original optical disc. A detection step of detecting at least one of a recording characteristic with respect to the original optical disc or a reproduction characteristic from the original optical disc, a provisional formation step of forming the deformation in a prescribed manner on the surface, and the provisional step In the forming step, based on the re-detection step of re-detecting one of the characteristics of the original optical disc on which the deformation has been formed, the detected characteristic, and the re-detected characteristic. And a determining step for determining an aspect of the deformation formed on the surface for the actual test.

[0014] In order to solve the above problems, the invention according to claim 12 is a test optical disk manufactured by using the test optical disk manufacturing method according to claim 8, wherein the concave shape The deformation of the mode determined by the dent is formed on the surface of the test optical disc itself.

[0015] In order to solve the above-mentioned problem, the invention according to claim 13 is a test disk manufacturing apparatus for manufacturing a test optical disk by forming a test deformation on a surface of an original optical disk. Recording characteristics for the original optical disk or playback characteristics from the original optical disk Detection means such as a characteristic detection unit that detects at least one of the characteristics, a provisional formation means such as a CPU that forms the deformation in a prescribed manner on the surface, and the deformation by the provisional formation means. Based on the re-detection means such as a characteristic detection unit that re-detects one of the characteristics of the formed original optical disc, the detected characteristic, and the re-detected characteristic, Determining means such as a CPU for determining the mode of deformation formed on the surface for testing.

Brief Description of Drawings

FIG. 1 is a block diagram showing a schematic configuration and operation of a test optical disc manufacturing apparatus according to an embodiment.

FIG. 2 is a flowchart showing the entire operation of the test optical disc manufacturing apparatus according to the embodiment.

FIG. 3 is a block diagram (I) showing a configuration example of a forming unit in the test optical disc manufacturing apparatus according to the embodiment.

FIG. 4 is a block diagram (Π) showing a configuration example of a forming unit in the test optical disc manufacturing apparatus according to the embodiment.

FIG. 5 is a block diagram (III) showing a configuration example of a forming unit in the test optical disc manufacturing apparatus according to the embodiment.

FIG. 6 is a block diagram showing a schematic configuration and operation of a test optical disk manufacturing apparatus according to an embodiment.

Explanation of symbols

[0017] 1 CPU

2 Characteristics detector

3 Amplification / Servo section

B light beam

5 Scratch amount control section

6 Scratch area

6 A carriage 7, 20 dent head

7A, 20A tip

8, 25 Kranno

9 Tape tape

10 Spinner motor

21 XY stage

22 Head support

20B thread

23 Torque wrench

24 Torque adjustment section

30 resist film

31 Heating stage

32 Stanno

100 Inspection Department

200 forming part

300 Confirmation part

Optical disk manufacturing equipment for S and SS test

SF surface

Wl, W2 deformation part

SDK material disc

DKtest optical disc for testing

BEST MODE FOR CARRYING OUT THE INVENTION

Next, the best mode for carrying out the present application will be described with reference to FIGS.

Note that the embodiment described below applies the present application to a test optical disc manufacturing apparatus that manufactures a test optical disc that is used when testing the operation resistance of an information recording device or the like at the time of manufacture or the like. This is an embodiment when applied.

FIG. 1 shows a schematic configuration and operation of the test optical disc manufacturing apparatus according to the embodiment. FIG. 2 is a flowchart showing the entire operation, and FIGS. 3 to 5 are block diagrams showing examples of the configuration of a forming unit (to be described later) in the test optical disc manufacturing apparatus.

As shown in FIG. 1, the test optical disc manufacturing apparatus S according to the embodiment includes an inspection unit 100 as a detection unit and a re-detection unit, a formation unit 200 as a temporary formation unit and a formation unit, and a determination unit. And a confirmation unit 300.

Next, the operation will be described.

[0023] The operation of the test optical disc manufacturing apparatus S according to the embodiment includes a shape determining operation for determining the shape of the deformed portion formed on the test optical disc according to the embodiment. a)), and a disc manufacturing operation (FIG. 1 (b)) in which a deformed portion having the determined shape is formed on an original optical disc as a material for the test optical disc to produce the test optical disc. There are two.

Among these, in the shape determination operation, as shown in FIG. 1 (a), first, in the inspection unit 100, information on the original optical disc SDK that is the material of the test optical disc according to the embodiment. Or at least one of the reproduction characteristics of the information from the original optical disc SDK (hereinafter, at least one of the information recording characteristics or the information reproduction characteristics is generally referred to as “characteristics”). The detection signal Sck indicating the detection result is generated and output to the forming unit 200 and the confirmation unit 200.

On the other hand, the original optical disc SDK in which the characteristics are detected in the inspection unit 100 is transferred to the forming unit 200, and the forming unit 200 uses the shape defined in advance as the initial shape of the deforming unit. Test deformed portions W1 and W2 are formed on the surface SF thereof, and a test optical disc DKtest (a test optical disc DKtest in which the shapes of the deformable portions W1 and W2 are the initial shapes) is manufactured. The forming method of the deformed portions W1 and W2 in the forming portion 200 and the shape of the deformed portions W1 and W2 themselves will be described later with reference to FIGS.

[0026] Next, the test optical disc DKtest in which the deformed portions W1 and W2 having the initial shape are formed is transferred to the confirmation unit 300, and the above characteristics in the portion where the deformed portions W1 and W2 are formed again. Detected. The re-detected characteristic (i.e., the first Characteristics of the test optical disk DKtest in which the deformed portions Wl and W2 having the initial shape are formed) and the characteristics detected for the original optical disc SDK in the inspection unit 100 are compared, and the formed deformed portions W1 and W2 are compared. W2 is a characteristic required for the test optical disk DKtest according to the embodiment (hereinafter, the characteristic as the test optical disk DKtest required for each of the deformed portions W1 and W2 is simply referred to as “desired characteristic”. It is confirmed whether or not Then, a confirmation signal Sib indicating a comparison result as a result of the confirmation is output to the forming unit 200.

[0027] Thereby, the forming unit 200 determines that each of the deformed parts W1 and W2 formed on the surface SF of each original optical disc SDK in the mass production of the test optical disc DKtest described later is based on the confirmation signal Sft. The shape of the deformed parts W1 and W2 is determined again so as to have the desired characteristics.

[0028] Then, as shown in Fig. 1 (b), the forming unit 200 as the disk manufacturing operation, as the deformed portions Wl and W2 finally determined by the shape determining operation shown in Fig. 1 (a). By storing the shape and forming the same deformed portions W1 and W2 for each of the original optical disc SDKs with the stored shape, mass production of the test optical disc D Ktest having the above desired characteristics is performed. .

Next, each operation of the test optical disc manufacturing apparatus S according to the embodiment whose outline has been described with reference to FIG. 1 will be described more specifically with reference to FIGS.

[0030] As the above-described characteristic inspection of the original optical disc SDK, the inspection unit 100, for example, inspects the above-mentioned characteristic of the original optical disc SDK, which is a general optical disc sold in general, and generates the inspection signal Sck indicating the result And output to the forming unit 200 and the confirmation unit 300 (FIG. 2, step Sl). In this case, specific examples of the characteristics include! / And so-called jitter characteristics (re, so-called jitter bottom characteristics) in the original optical disk SDK. In addition to this, intentionally recording conditions (for example, recording) It is also effective as a test optical disc to set the original characteristics of the test optical device worse by changing the intensity of the test light beam. The characteristics are inspected over the entire surface SF of the original optical disc SDK.

[0031] Next, based on the inspected characteristics, the original light device forming the deformed portions W1 and W2 The position of the SDK surface SF on the surface SF is specified in the formation part 200 (step S2 in FIG. 2).

[0032] At this time, as the specific method, specifically, for example, the optical disk SDK used until the formation positions and shapes on the surface SF of the deformed portions W1 and W2 are finally determined. The positions may be the same for all, or each of the original optical discs SD K is formed with the deformed portions W1 and W2 at positions on the surface SF having the above-mentioned characteristics equal to or higher than a predetermined threshold value. It's a good place to go!

[0033] Further, specifically as the position, for example, in the case of an optical disc, the inner peripheral portion is generally the most important part for exhibiting its function, so that the deformed portion W1 or W2 is formed in the inner peripheral portion. However, it is the most rigorous test optical disc and effective in simulating characteristics.

[0034] Then, the forming unit 200 forms the deformed portions W1 and W2 having the initial shape on the surface SF of the specified forming position (step S3 in FIG. 2), and the provisional test optical disc DK test As shown in FIG.

Thereby, the confirmation unit 300 has the above-mentioned characteristics at the positions where the deformed portions W1 and W2 of the test optical disk DKtest in which the deformed portions W1 and W2 of the initial shape are formed in the forming unit 200 are the desired Check if the characteristic is! /, Referring to the inspection signal Sck (steps S4 and S5 in Fig. 2).

Here, as the desired characteristic, specifically, for example, an information recording apparatus to be tested using a test optical disk DKtest has a 6.5% jitter caused by an optical disk to be operated. When it is determined by the corresponding standard that it should have operation tolerance, the deformed part W1 shall have a characteristic that causes 6% jitter, while the deformed part W2 has 7% jitter. It is preferable to have such characteristics.

[0037] Further, in the confirmation, as described above, at the position where the deformed portions W1 and W2 are formed! /, The position before and after the formation of the lever is confirmed, and the position where the deformed portion W1 is formed. The above-described characteristics are compared with the above-described characteristics at a position where the deformed portion W1 or the like is not formed.

Then, as a result of the confirmation, if the deformed portions W1 and W2 formed with the initial shape have the desired characteristics as the test optical disc DKtest, respectively (FIG. (2 Step S 5; YES), in the mass production of the test optical disk DKtest described later in the forming unit 200, it is determined that the test optical disk DKtest including the deformed parts W1 and W2 having the initial shape is mass-produced ( In FIG. 2, step S6), a confirmation signal Sib for controlling the forming part 200 so as to form the deformed parts W1 and W2 having the initial shape is output to the forming part 200.

[0039] On the other hand, as a result of the confirmation, if the deformed portions W1 and W2 formed with the initial shape do not have the desired characteristics as the test optical disk DKtest (step in FIG. 2) S5; NO), the operation returns to step S2 again, and the operations of steps S2 to S5 are executed again using another original optical disc SDK. In this case, in the operations in steps S2 and S3, deformed portions W1 and W2 are formed again as shapes and formation positions different from the shapes and formation positions whose characteristics were confirmed by the previous operations in steps S4 and S5 (step S2 and S3), the characteristics of the test optical disk DKtest in which the deformed portions W1 and W2 are formed are confirmed again (step S4). The above steps S2 to S5 are repeated for a plurality of original optical discs SDK, so that the specifications as the test optical disc DKtest having the above desired characteristics (that is, the shape of the deformed portions W1 and W2, the formation position, the number of formations, etc.) The confirmation signal Sib indicating the determined specification is finally output from the confirmation unit 300 to the forming unit 200 (step S6).

Then, the disk manufacturing operation shown in FIG. 1B is executed in the forming unit 200 with the specifications finally determined by the operation of step S6. That is, the specifications determined based on the contents of the confirmation signal Sft output from the confirmation unit 300 are stored in the formation unit 200, and a plurality of shapes, formation positions, the number of formations, and the like corresponding to the specifications are stored. Deformation parts W1 and W2 (when the number of formations is two, it is needless to say that three or more deformation parts may be formed) are formed on the original light disk SDK. The operation is repeated (Steps S7, S8; NO). When the production of the desired number of test optical disks DKtest is completed (Step S8; YES), the operation as a series of test optical disk manufacturing apparatuses S is completed.

[0041] The specific shape of the deformed portions W1 and W2 formed in steps S3 and S7 is, for example, the shape described in Patent Document 1, that is, the test target. When a user of the above information recording device or the like handles an optical disk for recording or reproducing information, a shape corresponding to a scratch or a fingerprint that is supposed to be formed on the surface, or the information recording device or the like operates. In this case, a shape corresponding to a scratch that is supposed to be formed on the surface of the optical disk is preferable. Furthermore, when manufacturing the test optical disc DKtest used for testing the above-mentioned operation resistance of the so-called servo characteristics of the information recording device or the like to be tested, it follows the circumferential direction of the test optical disc DKtest. The arc shape is preferable.

Next, a specific configuration example of the forming unit 200 will be described with reference to FIGS. As the configuration example, the first embodiment using so-called nanoimprint technology, the second embodiment in which the deformed portions W1 and W2 are formed by dents, and the configuration of the forming portion 200 according to the second embodiment are simplified. There are three third embodiments, which are configuration examples.

First, the first embodiment of the forming unit 200 using the nanoimprint technique will be specifically described with reference to FIG. Note that the first embodiment of the forming unit 200 shown in FIG. 3 explains the case of using the thermal nanoimprint technology that forms the deformed portions W1 and W2 using heat in the nanoimprint technology.

As shown in FIG. 3, in the first embodiment of the forming unit 200, first, a resist film 30 that is a thermoplastic resin is formed on the surface SF of the original optical disc SDK that is a material (step S 10). Then, the original optical disc SDK on which the resist film 30 is formed is placed on the heating stage 31 and heated (step S11).

[0045] After the resist film 30 is sufficiently heated, the shape as the mold for forming the initial shape (in the case of step S3 in FIG. 2) or the shape as the mold for forming the determined shape (FIG. 2). In the case of step S7), the stamper 32 whose surface has been processed is pressed with pressure (step S12) and cooled in that state (step S13). At this stage, the surface of the resist film 30 (the surface opposite to the original optical disc SDK side) is provided with shapes as deformed portions W1 and W2.

[0046] After that, after sufficiently cooling and removing the original stamper 32 (step S14), the deformed portions W1 and W2 are displayed on the surface of the original optical disc SDK by transferring the surface shape of the stamper 32. The optical disk DKtest for testing is completed on the surface SF.

[0047] As the formation unit 200 using the nanoimprint technique, a photocurable resist film is used as the resist film 30 in addition to the case of using the thermal nanoimprint technique shown in FIG. A so-called photo-nanoimprint technique is used in which deformed portions W1 and W2 are formed by using a stamper formed of a photo-curing resin and irradiating the stamper against the resist film while irradiating the resist film, for example, by curing the resist film It is also possible to use the forming part 200 employing the technique.

[0048] Further, in the case of using the above-described nanoimprint technology for the test optical disc corresponding to the high recording density optical disc, the thicknesses of the deformed portions W1 and W2 themselves formed using the nanoimprint technology are taken into consideration. Thus, it is effective that the total substrate thickness including the deformed portions W1 and W2 is, for example, a standard substrate thickness soil of 2 to 5 m applied to the high recording density optical disc.

Next, as a second embodiment of the forming portion 200, the case where the deformed portions W1 and W2 are formed by the dents will be specifically described with reference to FIG.

As shown in FIG. 4, the second embodiment of the forming portion 200 includes a dent portion 6, a dent head 7 having a tip portion 7A, a clamper 8, a table 9, and a spindle motor 10. And is composed of.

In this configuration, in the second embodiment of the forming unit 200, first, the original optical disc SDK is placed on the table 9 that is rotated in a preset rotation mode by the spindle motor 10, and the clamper 8 Fix the original optical disc SDK to Table 9.

[0052] On the other hand, the dent portion 6 is formed by moving a plurality of dent heads 7 each having a hemispherical and hard tip portion 7A at the tip thereof in a direction perpendicular to the surface SF of the original optical disc. Hit part 7A against surface SF.

[0053] Then, while rotating the original optical disc SDK through the table 9, the dent head 7 and the dent portion 6 are moved in the radial direction of the original optical disc SDK, and at the same time, the dent head 7 is moved up and down. By hitting the tip portion 7A against the surface SF, one or more circular dents corresponding to the shape of the tip portion 7A are formed on the surface SF. Thereby, as a set of the dents, The deformed parts Wl and W2 are formed in the original optical disc SDK.

[0054] At this time, by rotating the original disc SDK with the front end portion 7A being in contact with the surface SF, a shape simulating a pulling scratch or the like that can be formed in actual operation in the information recording apparatus or the like is obtained. It is also preferable to form the scratch as the deformed portion W1 or W2.

[0055] In the second embodiment of the forming unit 200, the data indicating the initial shape (in the case of step S3 in Fig. 2) or the data indicating the specifications determined by the operation in step S6 in Fig. 2 (Fig. 2). In the case of step S7), they are supplied to the dent portion 6 and the spindle motor 10, respectively, and used for the respective position control or rotation control. As a result, the deformed portions W1 and W2 are formed on the surface SF of the original optical disc SDK by the dents corresponding to the initial shape or specifications, and the test optical disc DKtest is completed.

Next, the third embodiment of the forming unit 200 in which the configuration of the second embodiment described with reference to FIG. 4 is simplified will be specifically described with reference to FIG.

As shown in FIG. 5, the third embodiment of the forming unit 200 includes a dent head 20 having a tip 20A and a thread 20B, a moving stage 21 having a clamper 25, The head support portion 22 and a torque wrench 23 having a knob 24 are included.

[0058] In the third embodiment of the forming unit 200, the original optical disc SDK moves in each of the X direction and the Y direction shown in Fig. 5 without the rotating table 9 as in the second embodiment of the forming unit 200. It is placed on a possible moving stage 21 and fixed to the moving stage 21 by a clamper 25.

[0059] On the other hand, the dent head 20 according to the third embodiment is provided with a tip portion 20A having a hemispherical shape similar to that of the second embodiment of the forming unit 200. Supported as possible. A torque wrench 23 is attached to the end of the dent head 20 opposite to the end provided with the tip 20A so as to mate with the screw thread 20B. Is used to move the dent head 20 up and down, and thereby the pressure when the tip 20A is pressed against the surface SF of the original optical disc SDK (in other words, the tip 20A is applied to the surface SR). The size of the dent formed) is determined. [0060] Then, with the pressure at the time of pressing being determined, the tip portion 20A is pressed against the surface SF of the original optical disc SDK by the support portion 22, and this operation is repeated for the required number of dents. As in the second embodiment of the formation part 200, dents as deformation parts W1 and W2 are formed on the surface SF.

In the third embodiment of the forming unit 200, data indicating the initial shape (in the case of step S3 in FIG. 2) or data determined by the operation of step S6 in FIG. 2 (FIG. 2). In the case of step S7), it is supplied as adjustment amounts in the XY stage 21, the support part 22, and the knob 24, respectively, and is used for position control and adjustment of the pressing pressure. As a result, the deformed portions W1 and W2 are formed on the surface SF of the original optical disc SDK by the dent of the initial shape or the shape corresponding to the specifications, and the test optical disc DKtest is completed.

[0062] Next, as an embodiment according to the present application, an embodiment of a test optical disc manufacturing apparatus in which the inspection unit 100, the formation unit 200, and the confirmation unit 300 described with reference to Figs. This will be specifically described with reference to FIG.

FIG. 6 is a block diagram showing a schematic configuration of the test optical disc manufacturing apparatus according to the embodiment. Further, the test optical disc manufacturing apparatus according to the embodiment employs the configuration of the second embodiment of the forming unit 200 described above as a method of forming the deformed portions W1 and W2 with respect to the original optical disc SDK.

[0064] As shown in FIG. 6, the test optical disc manufacturing apparatus SS according to the example includes the dent head 7, the dent portion 6, and the dent portion 6, which are related to the forming unit 200 shown in FIG. In addition to the clamper 8, the table 9 and the spindle motor 10, the CPU 1 as the provisional formation means, the determination means and the formation means, the characteristic detection section 2 as the detection means and the re-detection means, the amplification / servo section 3, and the pickup 4 And a dent amount controller 5 and a carriage 6A for moving the dent portion 6 in the radial direction of the original optical disc SDK.

In this configuration, as an operation corresponding to the operation of the inspection unit 100, when the original optical disc SDK is placed on the table 9, the CPU 1 rotates the original optical disc SDK in a preset rotation mode. Rotation control signal to control spindle motor 10 to rotate No. Sd is generated and output to the spindle motor 10.

In parallel with this, the pickup 4 irradiates the original optical disc SDK with the light beam B having a preset intensity, receives the reflected light at the pickup 4, and further receives the reflected light received. A detection signal Sp corresponding to is generated and output to the amplification / servo unit 3. At this time, the irradiation position of the light beam B on the original optical disc SDK (that is, the condensing position in the direction perpendicular to and parallel to the information recording surface of the original optical disc SDK) is from the amplification / servo unit 3. Based on the servo signal Ssv, the pickup 4 is controlled so that the light beam B is irradiated over the entire surface SF of the original optical disc SDK.

Next, the amplification / servo unit 3 performs an amplification process or the like on the generated detection signal Sp with a preset amplification factor, generates an amplified signal Sa, and outputs the amplified signal Sa to the characteristic detection unit 2 .

Accordingly, the characteristic detection unit 2 generates the inspection signal Sck indicating the characteristic for the original optical disc SDK based on the amplified signal Sa, and outputs the generated inspection signal Sck to the CPU 1.

Then, the CPU 1 temporarily stores the inspection result as the content of the inspection signal Sck (see step S 1 in FIG. 2).

Next, as an operation corresponding to the shape determining operation in the forming unit 200, the CPU 1 specifies the position on the surface SF of the original optical disc SDK where the deformed portions W1 and W2 having the initial shape are to be formed ( In step S2 in FIG. 2, a rotation control signal Sd corresponding to the position is generated and output to the spindle motor 10, and a radial position signal Spos corresponding to the position is generated and output to the carriage 6A. As a result, the spindle motor 10 and the carriage 6A are positioned in the radial direction of the dent portion 6 and the rotation of the original optical disc SDK so that the tip portion 7A is located at the position where the deformed portions W1 and W2 having the initial shape are formed. Set the position.

[0071] Then, in order to form the deformed portions W1 and W2 having the initial shape at the set position, the CPU 1 sends a control signal Sc for forming a dent corresponding to the initial shape to the dent amount control unit. Output to 5. As a result, the dent amount control unit 5 generates a dent control signal Scd for controlling the dent portion 6 and the dent head 7 so as to control the dent having the initial shape. Output to part 6.

Thereafter, the dent portion 6 moves each dent head 7 up and down based on the dent control signal Scd. By pressing each tip 7A against the surface SF of the original optical disc SDK, the deformed portions W1 and W2 having the above initial shape are formed on the surface SF of the original optical disc SDK to form a temporary test optical disc DKtest ( (See Figure 2, Step S3).

[0073] Next, as an operation corresponding to the shape determination operation in the confirmation unit 300, the pickup 4 performs the deformation portions W1 and W2 of the test optical disc DKtest in which the deformation portions W1 and W2 having the initial shape are formed. The light beam B is irradiated again to the position where is formed, the reflected light is received by the pickup 4, and the detection signal Sp corresponding to the received reflected light is generated and output to the amplification / servo unit 3 To do.

Next, the amplification / servo unit 3 performs the above amplification processing and the like on the generated detection signal Sp, generates an amplification signal Sa, and outputs it to the characteristic detection unit 2.

Thereby, the characteristic detection unit 2 generates the confirmation signal Sft indicating the characteristic re-detected for the test optical disc DKtest based on the amplified signal Sa, and outputs it to the CPU 1.

[0076] Then, as the operation of the confirmation unit 300, the CPU 1 connects to the original optical disc SDK stored in advance (when the deformation units W1 and W2 are formed! /, Na! /, At the stage)! / The characteristics detected in this way are compared with the characteristics in the portion of the test optical disk D Ktest on which the deformed portions W1 and W2 of the initial shape are provisionally formed, and the deformation formed with the initial shape is compared. It is confirmed whether the parts W 1 and W 2 have the desired characteristics, respectively (see steps S4 and S5 in FIG. 2).

Accordingly, as a result of the confirmation, the deformed portions W1 and W2 formed with the initial shape are obtained as the test optical disc DKtest! In this case (FIG. 2, step S5; YES), the CPU 1 has the specifications as the test optical disc DKtest in which the deformed portions W1 and W2 formed with the initial shape have the desired characteristics. Determine (see step S6 in Fig. 2).

[0078] Thereafter, as an operation corresponding to the operation at the time of the disc manufacturing operation (see FIG. 1 (b)), the CCU1 forms the deformed portions W1 and W2 as the initial shape on the surface SF of the original optical disc SDK. The rotation control signal Sd, the radial position signal Spos, and the control signal Sc for controlling the spindle motor 10, the stroke amount controller 5 and the carriage 6A are generated and Output to the spindle motor 10, the dent amount control unit 5 and the carriage 6A, and a plurality of original optical disk SDKs are used to manufacture test optical disks DKtest having the desired characteristics by the number of the original optical disk SDKs ( (See Figure 2, Steps S7 and S8).

[0079] On the other hand, as a result of confirmation in the CPU 1, if the deformed portions W1 and W2 formed with the initial shape do not have the desired characteristics as the test optical disc DKtest, The CPU 1 that returns to the operation of the above step S2 and executes the operations of the above steps S2 to S5 using another original optical disc SDK has a shape different from the initial shape. The above-mentioned rotation control signal Sd, radial position signal Spos, and control signal for controlling the spindle motor 10, the striking amount control unit 5 and the carriage 6A to form the deformed portions W1 and W2 on the surface SF of the original optical disc SDK. Sc is generated and output to the spindle motor 10, the dent amount controller 5 and the carriage 6A, and the deformed parts W1 and W2 having the different shapes are formed on the surface SF of the original optical disc SDK, and the characteristics are confirmed again. Move Repeat the operation (see steps S2 to S4 in Fig. 2). The operations of re-forming the deformed portions W1 and W2 and confirming their characteristics are performed until the shapes and formation positions of the deformed portions W1 and W2 having the desired characteristics are finally determined (see step S6 in FIG. 2). Will be repeated.

Then, as an operation corresponding to the operation at the time of the disc manufacturing operation (see FIG. 1 (b)), CPU 1 has deformed portions W 1 and W2 according to the final determined shape and formation position. The above-mentioned spindle motor 10 to be formed on the surface SF of the original optical disc SDK, the dent amount controller 5 and the rotation control signal Sd for controlling the carriage 6A, the radial position signal Spos, and the control signal Sc are generated to generate the spindle. Output to the motor 10, the dent amount control unit 5 and the carriage 6A, and use a plurality of original optical disc SDKs to produce test optical disks DKtest having the above desired characteristics by the number of the original optical disc SDKs (step in FIG. 2). S7, see S8).

[0081] As described above, according to the operation of the test optical disc manufacturing apparatuses S and SS according to the embodiments and the examples, the original optical disc SDK before forming the deformed portions W1 and W2 of the initial shape is provided. The shape of the deformed parts W1 and W2 for actual testing based on the characteristics and the characteristics detected again after provisionally forming the deformed parts W1 and W2 of the initial shape. Therefore, even if there are variations in the characteristics of the original optical disc SDK itself, the test optical disc DKtest with specifications that can be used for various tests under the desired standard is The original optical disc SDK can be manufactured as a material.

[0082] In addition, since the deformed portions W1 and W2 are formed on the surface SF of the original optical disc SDK instead of the signal recording surface to form a test optical disc DKtest, an unrecorded optical disc or the like that is generally sold is used as the original optical disc SDK. As a result, a test optical disk DKtest having necessary specifications can be manufactured using a test optical disk manufacturing apparatus having a simple configuration.

Furthermore, when the configuration of the first embodiment of the forming unit 200 is used for the shape determination operation, the surface shape of the stamper 32 having a surface shape corresponding to the initial shape is formed on the surface SF of the original optical disc SDK. Since the deformed portions W1 and W2 of the initial shape are formed on the surface SF by transferring to the resist film 30, for example, the deformed portions W1 and W2 having the initial shape accurately defined in advance as a design value are formed in many original shapes. It is possible to produce a large amount of test optical disk DKtest that can perform the required test more quantitatively and accurately, and can be formed on the surface SF of the optical disk SDK.

[0084] Furthermore, when the configuration of the second embodiment or the third embodiment of the forming unit 200 is used for the shape determining operation, a concave dent is formed on the surface SF of the original optical disc SDK to change the initial shape. By forming the parts W1 and W2 on the surface SF, the deformed parts W1 and W2 of the initial shape are formed on the surface SF, so that the configuration as the test optical disc manufacturing apparatus S or SS is simplified, for example It is possible to form the deformed portions W1 and W2 having exactly the initial shape preliminarily defined as values on the surface SF of many original optical disc SDKs, and to perform necessary tests more quantitatively and accurately. Possible test optical disk DKt est can be manufactured easily and in large quantities.

[0085] In addition, the test optical disk DKtest used for the actual test by forming the deformed portions W1 and W2 at the shapes and positions determined based on the characteristics before and after forming the deformed portions W1 and W2 having the initial shape. Therefore, even if there are variations in the characteristics of the original optical disc SDK itself, the test optical disc DKtest with specifications that can be used for various tests under the desired standard is used as the material for the original optical disc SDK. Can be formed as [0086] Further, when the configuration of the first embodiment of the forming unit 200 is used for the disc manufacturing operation, the surface shape of the stamper 32 having the determined shape and the surface shape corresponding to the forming position is used as the original optical disc. Since the deformed portions W1 and W2 of the determined shape and formation position are formed on the surface SF by transferring to the resist film 30 formed on the surface SF of the SDK, it is necessary more quantitatively and accurately. It is possible to manufacture a large amount of test optical disk DKtest capable of executing tests.

[0087] Further, when the configuration of the second embodiment or the third embodiment of the forming unit 200 is used for the disc manufacturing operation, the shape determined by forming the concave dent on the surface SF of the original optical disc SDK and Since the deformed portions W1 and W2 corresponding to the formation position are formed on the surface SF, the initial configuration preliminarily defined as a design value, for example, is accurately obtained while simplifying the configuration as the test optical disc manufacturing apparatus S or SS. Deformation parts W1 and W2 can be formed on the surface SF of the original optical disk SDK, and a test optical disk DKtest that can perform the necessary tests more quantitatively and accurately is manufactured easily and in large quantities. be able to.

[0088] Furthermore, when the deformed portions W1 and W2 are formed in an arc shape along the circumferential direction of the test optical disc DKtest, for example, when recording information on the optical disc or reproducing information from the optical disc. With the power S, it is possible to efficiently manufacture a test optical disk DKtest suitable for servo characteristics testing even if the characteristics of the original optical disk SDK itself vary.

[0089] Further, when the deformed portions W1 and W2 are formed on the surface SF of the original optical disc SDK in a shape and a formation position corresponding to scratches that may be formed sometimes by a user! Therefore, a test optical disk DKtest suitable for testing the resistance to movement of the scratch can be efficiently manufactured even when the characteristics of the original optical disk SDK itself vary.

[0090] Further, when the deformed portions W1 and W2 are formed on the surface SF of the original optical disc SDK in a shape and a formation position corresponding to a scratch that may be formed during an actual information recording / reproducing operation with respect to the optical disc. Provides an optical disk DKtest for testing that is suitable for testing the scratch resistance, even when the characteristics of the original optical disk SDK itself vary. The power S to do.

In the configuration of the second embodiment of the forming portion 200 described above, the deformed portions W1 and W2 are formed by pressing the tip portion 7A of the dent head 7 or the tip portion 20A of the dent head 20 against the surface SF of the original optical disc SDK. In addition to the force S described in the case of forming each, if the structure is configured such that each of the tip portions 7A and 20A is pressed against the surface SF while being heated, a larger dent can be formed on the surface SF by pressing once. As a result, the test optical disk DKtest can be shortened in manufacturing time.

Claims

The scope of the claims

[1] In a test optical disk manufacturing method for manufacturing a test optical disk by forming a test deformation on the surface of an original optical disk,

A detection step of detecting at least one of a recording characteristic for the original optical disc or a reproduction characteristic from the original optical disc;

A provisional forming step of forming the deformation of a prescribed aspect defined in advance on the surface; and the original optical disc on which the deformation is formed in the provisional formation step.

V, a re-detection process to re-detect one of the characteristics,

A determining step for determining the form of the deformation formed on the surface for the actual test based on the detected property and the re-detected property;

A method of manufacturing an optical disc for testing, comprising:

[2] The test optical disc manufacturing method according to claim 1! /,

In the temporary forming step, the surface shape of a mold having a surface shape corresponding to the specified mode is transferred to a material layer formed on the surface of the original optical disc, and the deformation of the specified mode is applied to the surface. A method for manufacturing a test optical disc, comprising: forming a test optical disc.

[3] The test optical disc manufacturing method according to claim 1! /,

In the temporary forming step, the test optical disc manufacturing method is characterized in that the deformation of the specified mode is formed on the surface by forming a concave dent on the surface.

[4] In the test optical disc manufacturing method according to any one of claims 1 to 3, in the redetection step, any one of the characteristics at the position where the deformation is formed on the surface is obtained. A method for producing a test optical disc, characterized by redetection.

[5] In the test optical disc manufacturing method according to any one of claims 1 to 4, in the re-detection step, any one of the characteristics at the position where the deformation is formed on the surface. And any one of the characteristics at the position of the surface other than the position where the deformation is formed are re-detected. Optical disc manufacturing method.

6. The test optical disc manufacturing method according to claim 1, wherein the deformation of the determined mode is formed on the surface of the original optical disc to form the test optical disc. A test optical disc manufacturing method, further comprising a step.

[7] The test optical disc manufacturing method according to claim 6,

In the forming step, the surface shape of a mold having a surface shape corresponding to the determined aspect is transferred to a material layer formed on the surface of the original optical disc, and the deformation of the determined aspect is performed. Is formed on the surface. A test optical disk manufacturing method characterized by comprising:

[8] In the test optical disc manufacturing method according to claim 6,

In the forming step, the deformation of the determined mode is formed on the surface by forming a concave dent on the surface.

[9] The test optical disc manufacturing method according to any one of claims 1 to 8, wherein the deformation is a deformation formed in an arc shape along a circumferential direction of the test optical disc. An optical disc manufacturing method for testing.

[10] In the test optical disc manufacturing method according to any one of claims 1 to 8, the deformation corresponds to a scratch formed on a surface of the optical disc when the user handles the optical disc. An optical disc manufacturing method for testing, comprising:

[11] The test optical disc manufacturing method according to any one of claims 1 to 8, wherein the deformation is at least one of an information recording device for recording information on the optical disc and an information reproducing device for reproducing information from the optical disc A test optical disc manufacturing method characterized by having an aspect corresponding to a scratch formed on the surface of the optical disc when either of them operates.

[12] A test optical disk manufactured using the test optical disc manufacturing method according to claim 8,

The deformation of the mode determined by the concave dent is the test optical disc. An optical disc for testing which is formed on a surface of itself.

[13] In a test optical disk manufacturing apparatus for manufacturing a test optical disk by forming a test deformation on the surface of the original optical disk,

Detecting means for detecting at least one of a recording characteristic for the original optical disc or a reproduction characteristic from the original optical disc;

Provisional forming means for forming the deformation in a prescribed form defined in advance on the surface; redetection means for redetecting one of the characteristics of the original optical disc on which the deformation is formed by the provisional formation means; ,

A determining means for determining an aspect of the deformation formed on the surface for the actual test based on the detected characteristic and the re-detected characteristic;

An optical disc manufacturing apparatus for testing, comprising:

[14] The test optical disc manufacturing apparatus according to claim 13,

A test optical disc manufacturing apparatus, further comprising forming means for forming the deformation of the determined mode on the surface of the original optical disc to form the test optical disc.