JP4629780B2 - Test optical disc manufacturing method and test optical disc manufacturing apparatus - Google Patents

Description

  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 apparatus or optical tolerance of an information reproducing apparatus For example, a test optical disk manufacturing method and a test optical disk manufacturing apparatus for manufacturing a test optical disk for testing the characteristics of each apparatus in the manufacturing stage of each apparatus, and a test optical disk technology manufactured by the test optical disk manufacturing apparatus and the like Belonging to the field.

  In recent years, optical discs such as DVDs (Digital Versatile Discs) and high recording density optical discs having a higher recording density than DVDs have been widely used as large-capacity recording media. 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.

  Here, in the information recording apparatus and the information reproducing apparatus (hereinafter referred to as an information recording apparatus as appropriate), so-called operation tolerance (playability) for various optical disks is required.

  In other words, the optical disc is currently 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, since the standard itself may be formulated as having a certain range, even an optical disc manufactured according to the standard inherently has some variation in the physical characteristics within that range. Have.

  In addition, depending on the manufacturing method in the manufacturer, an optical disc that does not exactly conform to the above-mentioned standard may be included, and in that case, the variation becomes more remarkable.

  On the other hand, even in the manufacturing stage, even if the optical disc is exactly compliant with the standard, while the purchaser is handling it, or while operations such as loading and unloading the information recording device etc. are repeated, Various scratches and human fingerprints may adhere to the surface of the optical disc, or the entire shape of the optical disc itself may be deformed.

  Therefore, in the above information recording apparatus and the like, it is assumed that there is an optical disk having a scratch on its surface, an optical disk that is out of specification with respect to physical characteristics, or a deformed optical disk, and even when such an optical disk is loaded, it is normal. Therefore, the above-mentioned operation resistance for operation is required. At this time, particularly in the high recording density optical disc, the substrate thickness is about one-sixth thinner than that of the DVD, so that the operation resistance against scratches and fingerprints formed on the surface of the substrate is more improved in handling. It has been demanded as a strict condition. At the time of manufacturing the information recording apparatus or the like, a performance test using the test optical disk to which the above various scratches and deformations are added is executed 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.
JP 2004-95038 A (FIGS. 1 to 7)

  However, in the conventional test optical disc described above, the operating characteristics of the original optical disc itself, which is a material for manufacturing the test optical disc, are not considered at all. There has been a problem that it may not be a test optical disc having specifications that can be used for testing.

  That is, the above-described conventional test optical disc is manufactured by artificially attaching various scratches to the surface of the original optical disc that is the material, and the original optical disc is usually sold to the general public. The optical disc itself is used. However, the sold optical disc itself may already include the above-described variations and deformations for the reasons described above, and the test optical disc itself manufactured using such an original optical disc as a material also includes Variations and the like are included. As a result, the test optical disc may not be provided with specifications that can be used for various tests under a desired standard.

  In addition, when artificially forming a scratch as described in the above-mentioned Patent Document 1, specifically, for example, a file or a cutting tool is used to scratch, but in such a method, There has also been a problem that it becomes difficult to manufacture a large number of test optical disks on which uniform flaws are formed due to clogging of a file or wear of a cutting tool or the like.

  Therefore, the present application has been made in view of the above-mentioned problems, and the problem is to provide various tests under a desired standard even when there are variations in the characteristics of the original optical disc itself. A test optical disc manufacturing method, a test optical disc manufacturing apparatus and a test optical disc manufactured by the apparatus can be manufactured in large quantities using the original optical disc as a material. There is to do.

In order to solve the above problems, the invention described in claim 1 is a test optical disc manufacturing method for manufacturing a test optical disc by forming a test deformation on the surface of the original optical disc. Or a detection step of detecting at least one of the reproduction characteristics from the original optical disc, and the characteristic detected by the detection step on the surface of the original optical disc having the characteristic equal to or greater than a predetermined threshold value. As a modification of the prescribed mode prescribed in advance, a temporary forming step of forming a concave dent on the surface, and any one of the original optical discs in which the deformation is formed in the temporary forming step and re-detecting step of re-detecting the characteristic, and the detected characteristics, the comparison and re-detected characteristic, a, is the re-detected Determining whether or not a characteristic has a desired characteristic, and determining a deformation mode to be formed on the surface for the actual test; and determining the deformation of the determined mode on the original optical disc. Forming on the surface to form the test optical disc.

In order to solve the above problems, the invention of claim 10 is directed to a test optical disc manufacturing apparatus for manufacturing a test optical disc by forming a test deformation on the surface of the original optical disc. Detection means for detecting at least one of the reproduction characteristics from the original optical disc, and a position on the surface of the original optical disc in which the characteristic detected by the detection step has the characteristic equal to or greater than a predetermined threshold. Further, as the deformation of the pre-defined prescription mode, the temporary forming means such as a CPU that forms a concave dent on the surface, and either one of the original optical disc in which the deformation is formed by the temporary forming means A re-detection means for re-detecting the characteristic of the detected value, comparing the detected characteristic with the re-detected characteristic, and Determining whether the determined characteristic has a desired characteristic, and determining means such as a CPU for determining the deformation mode formed on the surface for the actual test, and the deformation of the determined mode. Forming means for forming the test optical disk on the surface of the original optical disk.

1 is a block diagram showing a schematic configuration and operation of a test optical disc manufacturing apparatus according to an embodiment. It is a flowchart which shows the whole operation | movement of the optical disk manufacturing apparatus for a test which concerns on embodiment. It is a block diagram (I) which shows the example of a structure of the formation part in the optical disk manufacturing apparatus for a test which concerns on embodiment. It is a block diagram (II) which shows the structural example of the formation part in the optical disk manufacturing apparatus for a test which concerns on embodiment. It is a block diagram (III) which shows the structural example of the formation part in the optical disk manufacturing apparatus for a test which concerns on embodiment. It is a block diagram which shows schematic structure and operation | movement of the optical disk manufacturing apparatus for a test which concerns on an Example.

Explanation of symbols

1 CPU
2 Characteristic detection unit 3 Amplification / servo unit 4 Pickup B Light beam 5 Striking amount control unit 6 Striking unit 6A Carriage 7 and 20 Striking head 7A and 20A Tip 8 and 25 Clamper 9 Table 10 Spindle motor 21 XY stage 22 Head support part 20B Thread 23 Torque wrench 24 Torque adjustment part 30 Resist film 31 Heating stage 32 Stamper 100 Inspection part 200 Formation part 300 Confirmation part S, SS Test optical disk manufacturing apparatus SF Surface W1, W2 Deformation part SDK Material disk DKtest test Optical disc

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

  In the embodiment described below, the present application is applied to a test optical disc manufacturing apparatus that manufactures a test optical disc that is used when testing the operation tolerance in an information recording device or the like at the time of manufacture. It is an embodiment.

  FIG. 1 is a block diagram showing a schematic configuration and operation of the test optical disk manufacturing apparatus according to the embodiment, FIG. 2 is a flowchart showing the entire operation, and FIGS. 3 to 5 are the test optical disk manufacturing apparatus. It is a block diagram which shows the example of a structure of the formation part mentioned later in FIG.

  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 provisional formation unit and a formation unit, and confirmation as a determination unit. Part 300.

  Next, the operation will be described.

  As an operation of the test optical disc manufacturing apparatus S according to the embodiment, a shape determining operation (FIG. 1A) for determining the shape of the deformed portion formed for the test on the test optical disc according to the embodiment, There are two disc manufacturing operations (FIG. 1 (b)) in which the deformed portion having the determined shape is formed on the original optical disc as the material of the test optical disc to manufacture the test optical disc.

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

  On the other hand, the original optical disk SDK whose characteristics are detected by the inspection unit 100 is transferred to the forming unit 200, and the deforming part for testing is formed in the forming part 200 according to the shape preliminarily defined as the initial shape of the deforming part. W1 and W2 are formed on the surface SF, and a test optical disc DKtest (a test optical disc DKtest in which the shapes of the deformed portions W1 and W2 are the initial shapes) is manufactured. A method for forming 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.

  Next, the test optical disk 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-described characteristics in the portion in which the deformed portions W1 and W2 are formed are detected again. The re-detected characteristics (that is, characteristics in the portion of the test optical disk DKtest in which the deformed portions W1 and W2 having the initial shape are formed), characteristics detected in the inspection unit 100 for the original optical disk SDK, And the formed deformed portions W1 and W2 are characteristics required for the test optical disc DKtest according to the embodiment (hereinafter referred to as test optical discs DKtest required for the deformed portions W1 and W2, respectively). It is confirmed whether or not the characteristic is simply referred to as “desired characteristic”. Then, a confirmation signal Sfb indicating a comparison result as a result of the confirmation is output to the forming unit 200.

  As a result, the forming unit 200 determines that each of the deformed parts W1 and W2 formed on the surface SF of each original optical disk SDK in the mass production of the test optical disk DKtest described later has the desired characteristics based on the confirmation signal Sfb. The shapes of the deformed portions W1 and W2 are determined anew so as to have them.

  Then, as shown in FIG. 1B, the forming unit 200 stores the shapes as the deformed portions W1 and W2 finally determined by the shape determining operation shown in FIG. 1A as the disk manufacturing operation. Then, the same deformed portions W1 and W2 are respectively formed on the plurality of original optical discs SDK with the stored shape, thereby mass-producing the test optical disc DKtest having the desired characteristics.

  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.

  The inspection unit 100, for example, inspects the above-mentioned characteristics of the original optical disk SDK, which is an ordinary optical disk sold in general, and generates the inspection signal Sck indicating the result as the above-described characteristic inspection of the original optical disk SDK. Output to the unit 200 and the confirmation unit 300 (step S1 in FIG. 2). In this case, specific examples of the characteristics include so-called jitter characteristics (so-called jitter bottom characteristics) in the original optical disc SDK, but in addition to this, recording conditions (for example, the intensity of the recording light beam, etc.) are intentionally changed. It is also effective for the optical disc for testing to set the original characteristics of the optical disc for testing worse by changing the value. In addition, the characteristic is inspected over the entire area of the surface SF of the original optical disc SDK.

  Next, the position on the surface SF of the original optical disk SDK that forms the deformed portions W1 and W2 is specified in the forming portion 200 based on the inspected characteristics (step S2 in FIG. 2).

  At this time, as the specific method, specifically, for example, the same position for all of the original optical discs SDK used until the formation positions and shapes of the deformed portions W1 and W2 on the surface SF are finally determined. Alternatively, a position on the surface SF having the above-described characteristics equal to or greater than a predetermined threshold value in each original optical disc SDK may be set as the position where the deformed portions W1 and W2 are formed.

  Further, as the position, specifically, for example, in an optical disc, the inner peripheral part is generally the most important part for functioning. Therefore, forming the deformed part W1 or W2 on the inner peripheral part is a test. This is effective in simulating the most severe characteristics of an optical disc for use.

  Then, the forming unit 200 forms the deformed portions W1 and W2 having the initial shape on the surface SF at the specified forming position (step S3 in FIG. 2), and the verification unit 300 as a temporary test optical disc DKtest. Transport.

  As a result, the confirmation unit 300 has the above-described characteristics at the positions where the deformed portions W1 and W2 of the test optical disk DKtest where the deformed portions W1 and W2 of the initial shape are formed in the forming unit 200 become the desired properties. Is confirmed with reference 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 the test optical disk DKtest has an operation resistance against 6.5% jitter caused by the optical disk to be operated. When it is determined by the corresponding standard and the like that should be present, the deformed portion W1 has a characteristic that causes 6% jitter, while the deformed portion W2 has a characteristic that causes 7% jitter. It is preferable to have it.

  Further, in the confirmation, in addition to confirming the characteristics before and after the formation of the deformed portions W1 and W2 as described above, the characteristics at the positions where the deformed portions W1 and the like are formed and the deformed portions W1. It is good also as a structure confirmed after comparing with the said characteristic in the position in which etc. are not formed.

  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 (step S5 in FIG. 2; YES) In the mass production of the test optical disc DKtest described later in the forming unit 200, it is determined that the test optical disc DKtest including the deformed portions W1 and W2 having the initial shape is mass produced (step S6 in FIG. 2). A confirmation signal Sfb for controlling the forming unit 200 so as to form the deformed portions W1 and W2 having the shape is output to the forming unit 200.

  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 disc DKtest (FIG. 2, step S5; NO), The operation returns to the operation in step S2 again, and the operations in steps S2 to S5 are executed again using another original optical disk SDK. In this case, in the operations in steps S2 and S3, the deformed portions W1 and W2 are formed again as shapes and formation positions different from the shapes and formation positions whose characteristics have been confirmed by the previous operations in steps S4 and S5 (steps). 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). By repeating the operations in steps S2 to S5 for a plurality of original optical discs SDK, the specifications as the test optical disc DKtest having the desired characteristics (that is, the shape, the formation position, the number of formations, etc. of the deformed portions W1 and W2) Are finally determined, and the confirmation signal Sfb indicating the determined specifications is 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 in step S6. That is, the specifications determined based on the content of the confirmation signal Sfb output from the confirmation unit 300 are stored in the forming unit 200, and a plurality of original optical discs having shapes, formation positions, formation numbers, and the like corresponding to the specifications are stored. The operation of forming deformed portions W1 and W2 with respect to the SDK (in the case where the number of the above formed is two. Needless to say, three or more deformed portions may be formed) is repeated ( If the manufacture 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.

  In addition, as a specific shape of the deformation | transformation part W1 and W2 formed in the said step S3 and S7, for example, the shape described in the said patent document 1, ie, the user of the said information recording apparatus etc. which are test objects Is formed on the surface of the optical disc when the information recording device or the like is operated, or a shape corresponding to a scratch or fingerprint that is supposed to be formed on the surface of the optical disc for information recording or information reproduction. It is preferable to have a shape corresponding to a scratch. Furthermore, when manufacturing the test optical disk DKtest used when testing the above-mentioned operation tolerance of the so-called servo characteristics possessed by the information recording apparatus or the like to be tested, an arc shape is formed along the circumferential direction of the test optical disk DKtest. Preferably, the shape is

  Next, a specific configuration example of the formation unit 200 will be described with reference to FIGS. As the configuration example, the configuration of 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 unit 200 according to the second embodiment is simplified. There are three of the third embodiment, which is a configuration example.

(I) First Embodiment of Forming Section First, a first embodiment of the forming section 200 using the nanoimprint technology will be specifically described with reference to FIG. In addition, 1st Embodiment of the formation part 200 shown in FIG. 3 demonstrates the case where the thermal nanoimprint technique which forms the deformation | transformation part W1 and W2 using heat among the said nanoimprint techniques is used.

  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 disk SDK that is a material (step S10), and the resist film The original optical disk SDK 30 formed with 30 is placed on the heating stage 31 and heated (step S11).

  Then, 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 (in step S7 of FIG. 2). In this case, the stamper 32 whose surface is processed is pressed with pressure (step S12), and is cooled in that state (step S13). At this stage, the surface of the resist film 30 (the surface opposite to the original optical disk SDK side) has shapes as the deformed portions W1 and W2.

  After that, if the original stamper 32 is removed after sufficiently cooling (step S14), the deformed portions W1 and W2 are formed on the surface SF of the original optical disk SDK by transferring the surface shape of the stamper 32, and the test optical disk DKtest is completed.

  In addition to the case where the thermal nanoimprint technique shown in FIG. 3 is used, the formation part 200 using the nanoimprint technique uses a photocurable resist film as the resist film 30 and further forms the stamper 32 from a photocurable resin. The forming part 200 adopting so-called optical nanoimprint technology that forms the deformed parts W1 and W2 by irradiating, for example, ultraviolet rays to the resist film while the stamper is pressed against the resist film and curing the resist film. It is also possible to use.

  Further, in the case of using the nanoimprint technique for the test optical disk corresponding to the high recording density optical disk, the deformation is performed in consideration of the thickness of the deformed portions W1 and W2 themselves formed using the nanoimprint technique. It is effective that the thickness of the entire substrate including the portions W1 and W2 is, for example, a standard substrate thickness of ± 2 to 5 μm applied to the high recording density optical disc.

(II) Second Embodiment of Formation Portion Next, as a second embodiment of the formation portion 200, a case where the deformed portions W1 and W2 are formed by the above 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 7 </ b> A, a clamper 8, a table 9, and a spindle motor 10. It is configured.

  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 original optical disc SDK is used by the clamper 8. Is fixed to the table 9.

  On the other hand, the dent portion 6 is formed by moving up and down 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. Strike to the surface SF.

  Then, while rotating the original optical disc SDK via 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 to bring the tip 7A to the surface. By striking the SF, one or a plurality of circular dents corresponding to the shape of the tip 7A are formed on the surface SF. Thus, the deformed portions W1 and W2 are formed on the original optical disc SDK as a set of the dents.

  At this time, by rotating the original disk SDK while the front end portion 7A is in contact with the surface SF, a scratch having a shape simulating a scratch or the like that can be formed in actual operation in the information recording apparatus or the like is transformed into the deformed portion W1 or W2. It is also preferable to form as.

  In the second embodiment of the forming unit 200, data indicating the initial shape (in the case of step S3 in FIG. 2) or data indicating specifications determined by the operation in step S6 in FIG. 2 (in the case of step S7 in FIG. 2). Are respectively supplied to the dent portion 6 and the spindle motor 10 and used for position control or rotation control of each. 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.

(III) Third Embodiment of Formation Part Next, a third embodiment of the formation part 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 that includes a tip 20A and a thread 20B, a moving stage 21 that includes a clamper 25, and a head support. 22 and a torque wrench 23 provided with a knob 24.

  In the third embodiment of the forming unit 200, the original optical disc SDK is movable not in the rotating table 9 as in the second embodiment of the forming unit 200, but in each of the X direction and the Y direction shown in FIG. It is placed on the moving stage 21 and fixed to the moving stage 21 by the clamper 25.

  On the other hand, the dent head 20 according to the third embodiment including the tip portion 20A having the same hemispherical shape as the second embodiment of the forming portion 200 is rotatably supported by the head support portion 22 via the screw thread 20B. Has been. 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 mesh with the screw thread 20B. The torque wrench 23 uses a knob 24. The dent head 20 moves up and down by this operation, whereby the pressure when pressing the tip 20A against the surface SF of the original optical disc SDK (in other words, the strike formed on the surface SR by the tip 20A). The size of the mark) is determined.

  Then, the tip portion 20A is pressed against the surface SF of the original optical disc SDK by the support portion 22 in a state where the pressure at the time of pressing is determined, and this operation is repeated for the required number of dents, thereby forming the forming portion 200. As in the second embodiment, dents as the deformed portions W1 and W2 are formed on the surface SF.

  In the third embodiment of the forming unit 200, the data indicating the initial shape (in the case of step S3 in FIG. 2) or the data determined by the operation in step S6 in FIG. 2 (in the case of step S7 in FIG. 2). Are supplied as adjustment amounts in the XY stage 21, the support portion 22, and the knob 24, respectively, and are used for position control, adjustment of the pressing pressure, and the like. 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, 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 described with reference to FIG.

  FIG. 6 is a block diagram illustrating a schematic configuration of the test optical disc manufacturing apparatus according to the embodiment. The test optical disc manufacturing apparatus according to the example 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 on the original optical disc SDK.

  As shown in FIG. 6, the test optical disc manufacturing apparatus SS according to the example includes a dent head 7 having a tip portion 7 </ b> A, a dent portion 6, a clamper 8, and a table related to the forming unit 200 shown in FIG. 9 and the spindle motor 10, in addition to 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, the pickup 4, and the dent mark The quantity control unit 5 and a carriage 6A that moves the dent portion 6 in the radial direction of the original optical disc SDK are configured.

  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. In order to control the spindle motor 10, a rotation control signal 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 detects the light corresponding to the received reflected light. A signal Sp 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 a servo signal from the amplification / servo unit 3. Based on Ssv, the pickup 4 is controlled so that the light beam B is irradiated over the entire area of the surface SF of the original optical disk 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.

  Thereby, the characteristic detector 2 generates the inspection signal Sck indicating the characteristic of the original optical disk SDK based on the amplified signal Sa, and outputs it to the CPU 1.

  Then, the CPU 1 temporarily stores the inspection result as the content of the inspection signal Sck (see step S1 in FIG. 2).

  Next, the CPU 1 specifies the position on the surface SF of the original optical disk SDK where the deformed portions W1 and W2 having the initial shape are to be formed as an operation corresponding to the shape determining operation in the forming unit 200 (step in FIG. 2). S2), 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 rotational position of the original optical disc SDK so that the tip portion 7A is positioned at the position where the deformed portions W1 and W2 having the initial shape are formed. Set.

  Then, in order to form the deformed portions W1 and W2 having the initial shape at the set position, the CPU 1 outputs a control signal Sc for forming a dent corresponding to the initial shape to the dent amount control unit 5. To do. 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 unit 6.

  Thereafter, the dent portion 6 moves the dent heads 7 up and down based on the dent control signal Scd and presses the respective leading end portions 7A against the surface SF of the original optical disc SDK, thereby deforming the initial shape. The parts W1 and W2 are formed on the surface SF of the original optical disk SDK, and a temporary test optical disk DKtest is formed (see step S3 in FIG. 2).

  Next, as an operation corresponding to the shape determining operation in the confirmation unit 300, the pickup 4 is a position where the deformed portions W1 and W2 of the test optical disk DKtest on which the deformed portions W1 and W2 of the initial shape are formed are formed. Then, the light beam B is irradiated again, 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.

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

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

  Then, as the operation of the confirmation unit 300, the CPU 1 detects the characteristics detected for the original optical disc SDK (at the stage where the deformation units W1 and W2 are not formed) stored in advance and the deformation unit of the initial shape. W1 and W2 are compared with the characteristics of the test optical disk DKtest formed provisionally, and the formed deformed portions W1 and W2 each having the initial shape have the desired characteristics. Confirm whether or not (see steps S4 and S5 in FIG. 2).

  Thereby, as a result of the confirmation, when the deformed portions W1 and W2 formed with the initial shape have the characteristics required as the test optical disc DKtest (step S5 in FIG. 2; YES) The CPU 1 determines that the deformed portions W1 and W2 formed with the initial shape have specifications as the test optical disk DKtest having the desired characteristics (see step S6 in FIG. 2).

  Thereafter, as an operation corresponding to the operation at the time of the disc manufacturing operation (see FIG. 1B), the CPU 1 makes the spindle to form 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 motor 10, the dent amount control unit 5 and the carriage 6A are generated and sent to the spindle motor 10, the dent amount control unit 5 and the carriage 6A. The test optical disk DKtest having the desired characteristics is produced by the number of the original optical disks SDK using a plurality of original optical disks SDK (see steps S7 and S8 in FIG. 2).

  On the other hand, as a result of confirmation by the CPU 1, when the deformed portions W1 and W2 formed with the initial shape do not have the desired characteristics as the test optical disk DKtest (step S5 in FIG. 2). In order to return to the operation of step S2 again and execute the operations of steps S2 to S5 using the other original optical disk SDK, the CPU 1 changes the deformed portions W1 and W2 having shapes different from the initial shape. Is generated on the surface SF of the original optical disc SDK by generating 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. Output to the spindle motor 10, the dent amount controller 5 and the carriage 6A, and the deformed portions W1 and W2 having the different shapes are connected to the original light disk. To repeat an operation to check again the characteristics formed on the surface SF of the SDK (see FIG. 2 steps S2 to S4). The operations of re-forming the deformed portions W1 and W2 and confirming their characteristics are repeated 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). It will be.

  Then, as an operation corresponding to the operation at the time of the disc manufacturing operation (see FIG. 1B), the CPU 1 converts the deformed portions W1 and W2 into the surface SF of the original optical disc SDK according to the finally determined shape and formation position. The rotation control signal Sd, the radial position signal Spos, and the control signal Sc for controlling the spindle motor 10, the dent amount control unit 5 and the carriage 6A are generated to form the spindle motor 10, the dent amount. Output to the control unit 5 and the carriage 6A, and a plurality of original optical discs SDK are used to manufacture test optical discs DKtest having the desired characteristics by the number of the original optical discs SDK (see steps S7 and S8 in FIG. 2).

  As described above, according to the operation of the test optical disc manufacturing apparatuses S and SS according to the embodiment and the example, the characteristics of the original optical disc SDK before forming the deformed portions W1 and W2 having the initial shape, and the initial Since the shapes and positions of the deformed portions W1 and W2 for actual testing are determined based on the characteristics re-detected after the shape deformed portions W1 and W2 are provisionally formed, the original optical disc SDK itself Even if the characteristics vary, a test optical disk DKtest having specifications that can be used for various tests under a desired standard can be manufactured using the original optical disk SDK as a material.

  Further, since the deformed portions W1 and W2 are formed not on the signal recording surface of the original optical disc SDK but on the surface SF thereof and used as the test optical disc DKtest, a simple structure can be obtained by using an unrecorded optical disc or the like on the market as the original optical disc SDK. The test optical disc DKtest having the necessary specifications can be manufactured using the test optical disc manufacturing apparatus.

  Further, when the configuration of the first embodiment of the forming unit 200 is used for the shape determination operation, the resist film 30 formed on the surface SF of the original optical disc SDK is used as the surface shape of the stamper 32 having a surface shape corresponding to the initial shape. Since the deformed portions W1 and W2 having the initial shape are formed on the surface SF by transferring to the surface SF, for example, the deformed portions W1 and W2 accurately having the initial shape preliminarily defined as the design value are formed on the surfaces SF of many original optical discs SDK. Thus, it is possible to manufacture a large number of test optical disks DKtest that can be formed in the same manner and that can perform necessary tests more quantitatively and accurately.

  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 deform the deformed portions W1 and W2 of the initial shape. Since the deformed portions W1 and W2 having the initial shape are formed on the surface SF by forming the surface SF on the surface SF, the configuration as the test optical disc manufacturing apparatus S or SS is simplified, for example, as a design value. A test optical disk DKtest that can form the deformed portions W1 and W2 having the initial shape accurately on the surface SF of a large number of original optical disks SDK, and can perform necessary tests more quantitatively and accurately. It can be manufactured easily and in large quantities.

  Further, since the deformed portions W1 and W2 are formed at the shapes and positions determined based on the characteristics before and after forming the deformed portions W1 and W2 having the initial shape, the test optical disc DKtest used for the actual test is manufactured. Even if the characteristics of the original optical disk SDK itself vary, a test optical disk DKtest having specifications that can be used for various tests under a desired standard is formed using the original optical disk SDK as a material. Can do.

  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 surface SF of the original optical disc SDK. Since the deformed portions W1 and W2 having the determined shape and formation position are formed on the surface SF by transferring to the formed resist film 30, a necessary test can be executed more quantitatively and accurately. Test optical disks DKtest can be manufactured in large quantities.

  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 and the formation position determined by forming the concave dents on the surface SF of the original optical disc SDK. Since the corresponding deformed portions W1 and W2 are formed on the surface SF, the deformed portion W1 having an initial shape accurately defined in advance as a design value, for example, while simplifying the configuration as the test optical disc manufacturing apparatus S or SS and W2 can be formed on the surface SF of the original optical disk SDK, and a test optical disk DKtest capable of executing a necessary test more quantitatively and accurately can be manufactured easily and in large quantities.

  Furthermore, when the deformed portions W1 and W2 are formed in an arc shape along the circumferential direction of the test optical disk DKtest, for example, a servo characteristic test when recording information on the optical disk or reproducing information from the optical disk A test optical disc DKtest suitable for the above can be efficiently manufactured even when the characteristics of the original optical disc SDK itself vary.

  Further, when the deformed portions W1 and W2 are formed on the surface SF of the original optical disc SDK at a shape and a position corresponding to a scratch that may be formed when the user handles the optical disc, the operation resistance against the scratch The test optical disk DKtest suitable for the above test can be efficiently manufactured even when the characteristics of the original optical disk SDK itself vary.

  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 during actual information recording / reproducing operation with respect to the optical disc, The test optical disk DKtest suitable for the scratch resistance test can be efficiently manufactured even when the characteristics of the original optical disk SDK itself vary.

  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 this, if 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 manufacturing time of the test optical disk DKtest can be shortened.

Claims (10)

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 concave dent is formed on the surface of the original optical disc having the characteristic detected by the detection step at a position on the surface of the original optical disc having a characteristic equal to or greater than a predetermined threshold. A temporary forming step of forming
A re-detection step of re-detecting one of the characteristics of the original optical disc on which the deformation is formed in the provisional formation step;
The detected characteristic and the re-detected characteristic are compared to determine whether or not the re-detected characteristic has a desired characteristic, and the surface formed for the actual test is used on the surface. A determining step for determining a mode of deformation;
Forming the deformation of the determined aspect on the surface of the original optical disc to form the test optical disc;
A method of manufacturing an optical disc for testing, comprising: 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 producing a test optical disc, comprising: forming a test optical disc. In the test optical disc manufacturing method according to claim 1 or 2,
In the redetection step, the optical disc manufacturing method for testing is characterized by redetecting any one of the characteristics at a position where the deformation is formed on the surface. In the test optical disc manufacturing method according to any one of claims 1 to 3,
In the re-detection step, the one of the characteristics at the position where the deformation is formed on the surface and the one of the characteristics at the position of the surface other than the position where the deformation is formed. A test optical disc manufacturing method, characterized by performing re-detection.   5. The test optical disc manufacturing method according to claim 1, wherein, in the forming step, the surface shape of a mold having a surface shape corresponding to the determined aspect is used as the surface of the original optical disc. A test optical disc manufacturing method, wherein the deformation of the determined mode is formed on the surface by transferring to a material layer formed on the surface. In the test optical disc manufacturing method according to any one of claims 1 to 4,
In the forming step, the deformation of the determined mode is formed on the surface by forming a concave dent on the surface. In the test optical disc manufacturing method according to any one of claims 1 to 6,
The test optical disc manufacturing method, wherein the deformation is a deformation formed in an arc shape along a circumferential direction of the test optical disc. In the test optical disc manufacturing method according to any one of claims 1 to 6,
The method of manufacturing an optical disc for testing, wherein the deformation has an aspect corresponding to a scratch formed on a surface of the optical disc when a user handles the optical disc. In the test optical disc manufacturing method according to any one of claims 1 to 6,
The deformation corresponds to a scratch that is formed on the surface of the optical disc when at least one of an information recording device that records information on the optical disc and an information reproduction device that reproduces information from the optical disc operates. A test optical disc manufacturing method comprising: In a test optical disk manufacturing apparatus for manufacturing a test optical disk by forming a test deformation on the surface of an original optical disk,
Detecting means for detecting at least one of a recording characteristic for the original optical disc and a reproduction characteristic from the original optical disc;
A concave dent is formed on the surface of the original optical disc having the characteristic detected by the detection step at a position on the surface of the original optical disc having a characteristic equal to or greater than a predetermined threshold. Provisional forming means for forming
Re-detection means for re-detecting one of the characteristics of the original optical disc on which the deformation is formed by the temporary formation means;
The detected characteristic and the re-detected characteristic are compared to determine whether or not the re-detected characteristic has a desired characteristic, and the surface formed for the actual test is used on the surface. Determining means for determining a mode of deformation;
An apparatus for producing a test optical disc, 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 .

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