WO2011024241A1 - 光ディスクの修復方法及び修復装置 - Google Patents
光ディスクの修復方法及び修復装置 Download PDFInfo
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- WO2011024241A1 WO2011024241A1 PCT/JP2009/004270 JP2009004270W WO2011024241A1 WO 2011024241 A1 WO2011024241 A1 WO 2011024241A1 JP 2009004270 W JP2009004270 W JP 2009004270W WO 2011024241 A1 WO2011024241 A1 WO 2011024241A1
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- Prior art keywords
- polishing
- abrasive
- disk
- repaired
- supply
- Prior art date
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- 230000003287 optical effect Effects 0.000 title claims abstract description 97
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000005498 polishing Methods 0.000 claims abstract description 231
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 85
- 230000008439 repair process Effects 0.000 claims description 67
- 230000007246 mechanism Effects 0.000 claims description 13
- 238000005259 measurement Methods 0.000 claims 2
- 238000011084 recovery Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 2
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- 230000020169 heat generation Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000007517 polishing process Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B57/00—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents
- B24B57/02—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents for feeding of fluid, sprayed, pulverised, or liquefied grinding, polishing or lapping agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/005—Control means for lapping machines or devices
- B24B37/015—Temperature control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/04—Lapping machines or devices; Accessories designed for working plane surfaces
- B24B37/07—Lapping machines or devices; Accessories designed for working plane surfaces characterised by the movement of the work or lapping tool
- B24B37/10—Lapping machines or devices; Accessories designed for working plane surfaces characterised by the movement of the work or lapping tool for single side lapping
- B24B37/105—Lapping machines or devices; Accessories designed for working plane surfaces characterised by the movement of the work or lapping tool for single side lapping the workpieces or work carriers being actively moved by a drive, e.g. in a combined rotary and translatory movement
- B24B37/107—Lapping machines or devices; Accessories designed for working plane surfaces characterised by the movement of the work or lapping tool for single side lapping the workpieces or work carriers being actively moved by a drive, e.g. in a combined rotary and translatory movement in a rotary movement only, about an axis being stationary during lapping
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/50—Reconditioning of record carriers; Cleaning of record carriers ; Carrying-off electrostatic charges
- G11B23/505—Reconditioning of record carriers; Cleaning of record carriers ; Carrying-off electrostatic charges of disk carriers
Definitions
- the present invention relates to a method for repairing a scratch or the like generated on a reading surface of an optical disc such as a CD, a DVD, a Blu-ray disc (hereinafter referred to as BD), and an apparatus therefor.
- an optical disc such as a CD, a DVD, a Blu-ray disc (hereinafter referred to as BD)
- BD Blu-ray disc
- Optical discs such as CD, DVD, and BD are made of transparent resin (however, some products are colored with respect to visible light), and are generally about 1.2mm thick and 120mm in diameter. A hole with a diameter of 15 mm is provided in the part.
- FIG. 8A and 8B are diagrams showing the structure of a general optical disc 100.
- FIG. 8A is a plan view
- FIG. 8B is a cross-sectional view taken along the line XX in FIG.
- the right half shows CD and DVD, and the left half shows BD.
- the information held by the optical disk is recorded on the surface opposite to the reading surface in the case of CD, on the layer about 0.6 mm below the reading surface in the case of DVD, and on the layer 0.1 mm below the reading surface in the case of DVD.
- the information is read by irradiating the information recording layer holding the information from the reading surface with a laser beam and detecting the reflected light from the information recording layer.
- the reading surface does not damage the information itself. Therefore, if there is no failure in the information recording layer, information can be reproduced again by repairing the scratch on the reading surface.
- FIG. 9 is an enlarged view of the cross section of the single layer BD with the readout surface facing upward.
- An information recording layer 130 is provided on a substrate 120 made of about 1.1 mm polycarbonate resin, and a cover of about 0.1 mm is formed thereon.
- a layer 140 and a hard coat layer 150 of 2 to 5 ⁇ m are provided.
- 10 (a) and 10 (b) are enlarged cross-sectional views with the reading surface of the optical disc facing upward, and correspond to the area surrounded by the circle A in FIG.
- FIG. 10A shows a state in which the surface 160 of the reading surface is scratched
- FIG. 10B shows a state in which the portion has been scraped off.
- the optical disk can be repaired by scraping the surface of the disk by a thickness corresponding to the depth of the substantially scratched surface and performing mirror polishing.
- Such an optical disk repair device includes, for example, a rotary table on which an optical disk to be repaired is placed, a disk-shaped polishing body, and the like, and the polishing body is brought into contact with the reading surface of the optical disk to The reading surface of the optical disk is polished by rotating the rotary table.
- the polishing methods using the conventional optical disk repair device as described above can be roughly classified into three types.
- One of them is called a dry method, in which a buff mainly composed of sponge, felt, cloth or the like is held with a relatively high-viscosity abrasive and the disc is polished by the buff.
- the second method is called wet, and is a method in which the disc is ground with sandpaper or the like while water is applied, and then mirror-polished with a buff holding an abrasive in the same manner as the dry method.
- the third method is an intermediate method between them.
- a high-viscosity colloidal abrasive diluted with a low-viscosity liquid such as milk is polished with a buff while continuously flowing through a disk using a pump. It is a method to do.
- the first dry polishing method has a simple device structure, so the device is provided at a low cost.
- the polishing with the buff and the abrasive functions mainly with the abrasive between the buff and the disk.
- the polishing power decreases rapidly when it dries only during the period in which it is wet. Therefore, there is a problem that the repair ability is low, and in the case of deep scratches, it takes a long time to repair.
- the disk is scraped while water is applied, heat generation and shavings can be eliminated, and strong grinding with sandpaper or the like is possible, so that the repair ability is high, but rough polishing and buffing with sandpaper etc. Since two polishing steps of final polishing with an abrasive are necessary, the structure of the apparatus is complicated and the apparatus tends to be expensive.
- the third polishing method in which the diluted abrasive is poured is always supplied to the disk during the repair period, so that the repair ability is higher than that of the dry repair device. Will continue to be supplied, so the disc will be easily soiled. For this reason, it is necessary to clean or clean the disk after the repair, and there is a problem that the work is troublesome.
- the present invention has been made in view of the above points, and an object of the present invention is to provide an optical disc that has a high ability to repair scratches on the optical disc, requires less labor for the operator, and can reduce the manufacturing cost of the apparatus.
- An object of the present invention is to provide a repair device and an optical disk repair method.
- An optical disk restoration device for polishing a read surface of a disk to be repaired by rotating the polishing pad holding the abrasive and the disk to be repaired relative to each other in a contact state, a) an abrasive supply means for supplying an abrasive to the reading surface of the disk to be repaired or the polishing pad; b) polishing water supply means for supplying polishing water to the reading surface of the disk to be repaired or the polishing pad; c) The abrasive supply means is operated intermittently in order to maintain the amount of abrasive held on the polishing pad during polishing, and the polishing is performed to replenish the moisture of the abrasive evaporated by the polishing heat.
- Supply control means for intermittently operating the water supply means; It is characterized by providing.
- the optical disk repair device is a dry repair device that polishes with a polishing pad such as an abrasive and a buff, and supplies abrasive water to the polishing surface and polishing water to the polishing surface.
- Polishing water supply means is provided.
- the supply control means intermittently operates the abrasive supply means so that the abrasive continues to exist effectively for a long period of time between the polishing pad and the disk to be repaired, and supplies an appropriate amount of abrasive thereto in a timely manner. .
- the cooling water supply means is operated intermittently in order to cool the repaired disk that has generated heat due to polishing and to recover the polishing ability that decreases due to drying of the polishing agent, so that the polishing water is applied to the polishing surface in a timely and appropriate amount. Supply.
- An optical disc restoration method made to solve the above problems
- An optical disk repairing method comprising a dry polishing step of polishing a reading surface of a disk to be repaired by rotating the polishing pad holding the abrasive and the disk to be repaired relative to each other in a contact state
- the polishing step is a) an abrasive supply step of intermittently supplying the abrasive to the reading surface of the disk to be repaired or the polishing pad in order to maintain the amount of abrasive held on the polishing pad during polishing;
- a polishing water supply step of intermittently supplying polishing water to the reading surface of the disk to be repaired or the polishing pad in order to replenish the moisture of the abrasive evaporated by the polishing heat; It is characterized by having.
- the optical disk repair device and the optical disk repair method according to the present invention are a dry optical disk repair device and an optical disk repair method in which polishing is performed with an abrasive held in a polishing pad. While supplying the abrasive intermittently, the moisture of the abrasive evaporated by the heat generated by friction is intermittently replenished. As a result, the amount and physical properties of the abrasive present between the polishing pad and the disk to be repaired can be properly maintained over a long period of time, and the repair ability is higher than that of the conventional dry repair apparatus and repair method.
- the conventional dry restoration apparatus does not have an abrasive supply means for supplying the abrasive to the polishing surface being polished, it is necessary to apply the abrasive manually at the start of the repair, and the abrasive only once in one polishing process. Cannot be applied. Polishing with a buff and an abrasive has the expected polishing ability when an appropriate amount of abrasive exists between the buff and the disk with the appropriate physical properties. There is little time to maintain the appropriate physical properties. Therefore, for example, in order to polish a disk to be repaired by 1 ⁇ m, it is necessary to repeat the application and polishing of the abrasive a plurality of times, which is troublesome for the operator.
- the repair device since the repair device according to the present invention includes the abrasive supply means for supplying the abrasive to the polishing surface being polished, the abrasive can be supplied a plurality of times during one polishing process. Furthermore, since the polishing water supply means for supplying a small amount of water to the polishing surface being polished is provided, the polishing ability that is reduced by drying of the abrasive can be recovered. Therefore, it is possible to maintain the polishing force over a long period of time, and deep flaws can be repaired without bothering the operator.
- the optical disk repair device repairs an optical disk only by polishing with a polishing pad and an abrasive
- the structure of the device is simpler than that of a wet repair device, and can be manufactured at low cost.
- the optical disk is less likely to become dirty as compared with a method in which a diluted polishing agent having a simple structure is applied, and there is no need to clean the repaired disk.
- FIG. 1 It is a schematic diagram which shows the outline of the optical disk repair apparatus based on this invention. Sectional drawing of a polishing pad. It is a perspective view which shows the structure of an abrasive
- FIG. 10 is an enlarged view of the inside of the circle in FIG. 9, where (a) is a scratched state before repair, and (b) is an enlarged cross-sectional view showing a state where the surface is scraped off by repair.
- FIG. 1 is a perspective view showing an internal structure of a repair device 10 according to the present invention.
- the repair device 10 includes a repair table 21 on which the optical disk 100 to be repaired is placed, and a motor 53 that rotates the repair table 21.
- the periphery of the repair table 21 is surrounded by a plate member (not shown), and the upper portion of the repair table 21 is covered with an upper lid 20 that can be opened and closed.
- the upper lid 20 is opened by the opening mechanism 23 after the polishing of the optical disc 100 is completed.
- a mechanism for opening the upper lid 20 by a driving mechanism such as a motor, a spring for urging the upper lid 20 in the opening direction, a hook for maintaining the upper lid 20 in a closed state, and an upper lid 20 are opened.
- a driving mechanism such as a motor
- a spring for urging the upper lid 20 in the opening direction a hook for maintaining the upper lid 20 in a closed state
- an upper lid 20 is opened.
- Various things, such as what consists of a hook release mechanism which removes a hook can be used.
- a polishing pad holding portion 241 is rotatably attached to the lower surface of the upper lid 20, and the polishing pads 24 a and 24 b attached to the lower surface of the polishing pad holding portion 241 are pressed against the optical disc 100 to be repaired with an appropriate pressure.
- a polishing agent tank 47 that holds the polishing agent is connected to two polishing agent supply nozzles 26 a and 26 b that supply the polishing agent to the surface of the optical disc 100 via an abrasive supply pump 40 described later.
- a polishing water tank 37 that holds polishing water is connected to two polishing water supply nozzles 27 a and 27 b that supply polishing water to the surface of the optical disc 100 through a polishing water supply pump 30 that will be described in detail later.
- the motor 53, the polishing water supply pump 30, the lid opening mechanism 23, and the like operate according to instructions from the control unit 22.
- two polishing pads 24a and 24b, abrasive supply nozzles 26a and 26b, and two polishing water supply nozzles 27a and 27b are used. However, if one or more of each is used, the function can be achieved. it can.
- a coil spring 29 is provided inside the bearing portion 28 that holds the rotating shaft of the polishing pad holding portion 241, and the polishing pad is provided.
- a method of pressing the polishing pads 24a and 24b on the lower surface of the holding unit 241 against the optical disc 100 with an appropriate pressure may be used.
- the optical disc 100 is rotated by the motor 53 in a state where the polishing pads 24a and 24b are in contact with the optical disc 100 with an appropriate pressure, and the stress is applied.
- the polishing pads 24a and 24b and the polishing pad holding unit 241 are passively rotated
- the polishing pads 24a and 24b and the polishing pad holding unit 241 are actively rotated by a motor, and the stress is applied to the optical disc 100.
- the upper lid 20 is in a standby state in an open state as indicated by a broken line in FIG. 1.
- the optical disk 100 to be repaired with the reading surface facing upward is placed on the repair table 21, the upper lid 20 is closed, and repair is started.
- the motor 53 starts to rotate in accordance with an instruction from the control unit 22, and at the same time, the abrasive supply pump 40 starts to operate. 1 drop or several drops at a time. The abrasive enters between the rotating optical disk 100 and the polishing pads 24a and 24b, and polishing starts.
- the control unit 22 operates the polishing water supply pump 30 when an appropriate time has elapsed, and water (polishing water) is supplied to the upper surface of the optical disc 100 at a predetermined timing. Add a drop or several drops at a time. The polishing water is dropped on the upper surface of the rotating optical disk 100 in the same manner as the above-mentioned abrasive and enters between the optical disk 100 and the polishing pads 24a and 24b.
- the control unit 22 stops the supply of the abrasive and the polishing water while rotating the optical disk 100 by the motor 53.
- heat generated by friction between the polishing pad 24 and the optical disc 100 vaporizes moisture present on the surfaces of the polishing pad 24 and the optical disc 100, and the polishing pad 24 wipes the optical disc 100. If this state is continued for a long time, the optical disk 100 is melted or deformed due to heat generation, but if it is continued for an appropriate time shorter than that, the polishing agent on the surface of the optical disk 100 is wiped by the polishing pads 24a and 24b. The top surface of 100 becomes clean.
- the control unit 22 opens the upper lid 20 by the lid opening mechanism 23 before stopping the motor 53 so that the polishing pad 24 and the optical disc 100 are in a non-contact state. Thereby, the contact mark of the polishing pad 24 does not remain on the reading surface of the optical disc 100.
- FIG. 3 is a perspective view showing an outline of the abrasive supply pump 40.
- a tube 42 made of a flexible resin, which is a flow path for the abrasive, is placed along the inner wall of the annular housing 41 that is partially opened.
- a rotor 44 in which the shaft 54 of the motor 53 is inserted through an opening formed in the center is disposed inside the housing 41.
- a plurality of rollers 43 a and 43 b are attached to the edge of the rotor 44, and the rollers 43 a and 43 b squeeze the tube 42 between the inner wall of the housing 41.
- the rotor 44 is connected to a motor 53 via a speed reducer 51 described later, and the rotor 44 rotates when the motor 53 rotates when the speed reducer 51 is in a predetermined state described later.
- FIG. 4 is a plan view of the abrasive supply pump 40.
- the rotor 44 rotates in the direction of the arrow, the crushing position of the tube 42 moves in the same direction, so that the contents of the tube 42 are also sent out in the direction of the arrow.
- Such a pump is called a tube pump, and since the contents to be transported do not come into contact with mechanical elements that involve friction and sliding such as valves and pistons, there is a risk of scraping things that come into contact with it, such as abrasives. Suitable for handling certain substances.
- An abrasive supply pump 40 that is a tube pump of the present embodiment shown in FIG. 1 is of a type that decelerates and drives the rotational motion of a motor 53 that rotates an optical disk 100 by a speed reducer 51, and is driven by an electromagnetic solenoid 59.
- the pump operation is switched on / off.
- a general tube pump integrated with the motor 46 and the speed reducer 45 can be used as the abrasive supply pump, as shown in FIG.
- the pump operation is switched on / off by rotating or stopping a motor 46 different from the motor 53 that rotates the optical disk 100.
- a shaft 54 of a motor 53 is provided at the center of the speed reducer 51.
- the shaft 54 is inserted through an oval through hole 551 formed in a plate-like lever 55.
- An idler (idling wheel) 56 is rotatably mounted near the center of the upper surface of the lever 55.
- a plunger 60 of an electromagnetic solenoid 59 is attached to the end of the lever 55. When the plunger 60 moves back and forth, the lever 55 reciprocates around a position 55a different from the rotation center 54a of the shaft 54 within a range in which the side surfaces of the shaft 54 and the through hole 551 do not contact each other.
- the controller 22 energizes the solenoid 59, retracts the plunger 60 and rotates the lever 55 counterclockwise as shown in FIG. 6B.
- the idler 56 and the shaft 54 come into contact with each other on the side surfaces, and the rotational motion of the shaft 54 is transmitted to the idler 56, and the internal gear 58 rotates through the external gear 57 connected to the idler 56.
- the diameter of the shaft 54 is 10 mm
- the diameter of the idler 56 is 40 mm
- the number of teeth of the external gear 57 is 15, and the number of teeth of the internal gear 58 is 60
- the internal speed is 1/16 of the rotational speed of the shaft 54.
- the tooth gear 58 rotates.
- the abrasive supply pump 40 functions as a tube pump that uses the motor 53 as a drive source while the solenoid 59 is energized, and the abrasive stored in the abrasive tank 47 is used as the abrasive supply nozzle. 26. While the solenoid 59 is not energized, the plunger 60 is returned to the original position (position shown in FIG. 6A) by the action of a spring (not shown), and the shaft 54 and the idler 56 are separated from each other. The rollers 43a and 43b stop at that position, and the operation of the abrasive supply pump 40 stops.
- two polishing pads 24a and 24b are used.
- two polishing agent supply nozzles 26a, 26b is deployed.
- one tube 42 is branched and two abrasive supply nozzles 26a and 26b are provided at the respective tips, it is difficult to control the amount of the abrasive coming out of each nozzle.
- there may be inconveniences such as air entering from the higher nozzle and leakage of the abrasive from the other. This inconvenience can be solved by disposing two independent tubes 42 between the housing 41 and the roller 43 for each of the abrasive supply nozzles 26a and 26b in the abrasive supply pump 40 of FIG.
- the solenoid 59 pulls the lever 55 to supply the abrasive.
- the outlet side tube 42 of the polishing agent supply pump 40 is slightly crushed by the solenoid 59 in the same manner as the polishing water supply pump 30 shown in FIG.
- polishing agent can be prevented.
- a similar function can also be realized by rotating the motor 53 in reverse during the operation of the abrasive supply pump 40.
- the polishing water supply pump 30 is a pump for replenishing the moisture of the abrasive that evaporates due to frictional heat between the polishing pads 24a and 24b and the optical disc 100 in the above-described repairing process, and its discharge amount does not require a large amount.
- the ability to supply a small amount of water stably is necessary.
- it since it operates several times in one repair process, it is necessary to have high durability.
- FIG. 7A is a perspective view showing the structure of the polishing water supply pump 30 devised to satisfy the above-described functions.
- FIG. 7C is a cross-sectional view showing the structure of the valves 31a and 31b.
- the valve function is provided by the spring 35 and the ball 36, but the same function can be satisfied by various methods.
- FIG. 7A shows an example in which the pusher 33 is driven by the electromagnetic solenoid 34, but a drive mechanism that combines a motor and a cam can be used to drive the pusher 33.
- FIG. 7A shows an example in which the pusher 33 is driven by the electromagnetic solenoid 34, but a drive mechanism that combines a motor and a cam can be used to drive the pusher 33.
- FIG. 7D is a diagram showing a state in which the polishing water is supplied from the polishing water tank 37 to the optical disc 100 through the polishing water supply pump 30.
- FIG. 1 shows an example in which polishing water is supplied to the optical disc 100 by means of thin tubular polishing water supply nozzles 27a and 27b.
- a spray head 38 is provided at the tip of the polishing water discharge port. It is better to supply the polishing water to the surface of the optical disk 100 in a wide and uniform manner.
- the control unit 22 desirably adjusts the discharge amount or discharge interval of the polishing agent or polishing water according to the operation history of the apparatus and the temperature or humidity in or around the apparatus. For example, when the operation history of the apparatus is recorded in the memory or the like in the control unit 22 and the first polishing is performed on the day, the supply amount of the abrasive or polishing water is increased, or the polishing is already performed several times on the same day. If there is, the supply amount thereof may be adjusted according to the number of polishings performed so far, the elapsed time from the end of the previous polishing, or the like.
- the temperature or humidity sensor measures the temperature or humidity inside or around the device, and according to the measured value, when the abrasive is easily dried, the amount of abrasive or polishing water supplied is increased, Conversely, when it is difficult to dry, the supply amount thereof may be reduced.
- the supply amount of the polishing agent and the polishing water can be optimized according to the situation at the time of polishing.
- the optical disk repair device 10 allows the operator to select the repair time according to the state of the scratch. It is desirable to be. For example, when one of the repair times set in stages is selected by the operator, the control unit 22 may control the discharge amount and discharge interval of the abrasive and polishing water accordingly. desirable.
- the amount of the abrasive supplied during polishing may be set to an amount that maintains the amount of the abrasive held on the polishing pad 24. Further, the amount of polishing water supplied during polishing may be set to an amount sufficient to replenish the moisture of the abrasive evaporated by the polishing heat.
- a 1-minute mode that requires 1 minute for restoration a 2-minute mode that requires 2 minutes, and a 3-minute mode that requires 3 minutes are set. Allot 40 seconds after the start for polishing and 20 seconds for dry wiping. Then, one discharge amount of the abrasive is set to 0.1 g, and one discharge is performed at the start of repair and 20 seconds later, or one discharge amount is set to 0.05 g and discharged at intervals of 10 seconds.
- the discharge amount per time is set to 0.04 g, and the discharge is performed at intervals of approximately 5 seconds.
- the supply of polishing water is not performed at the start of repair, but may be started after about 5 seconds have elapsed since the start of repair.
- the discharge interval is increased by increasing the discharge amount per time, or conversely, the discharge interval is decreased by decreasing the discharge amount per time, or the total discharge amount is increased or decreased.
- Change the discharge amount and discharge interval according to the operation history, temperature, humidity, etc. change the discharge amount and discharge interval once for each repair mode, and set the repair time continuously instead of step by step Or you may.
- the discharge interval may be intermittent even if it is not periodic. 20 seconds is also an example of the time allotted for wiping. For example, when the air is dry, shorten it (for example, 10 seconds), or in 3 minutes mode or have already performed repairs many times.
- the polishing pad 24 is considerably wet as in the case of, for example, the polishing pad 24 may be lengthened (for example, 30 seconds).
- the optical disk 100 can be repaired with a simple operation by simply placing the optical disk 100 to be repaired on the repair table 21 and closing the upper lid 20.
- the optical disc is wiped clean at the start and at the end of repair.
- the control unit 22 that controls on / off of the motor 53, the abrasive supply pump 40, and the polishing water supply pump 30 performs the polishing in a state where the supply of the polishing water and the abrasive is stopped at the final stage of the repair.
- the pad 24 and the optical disc 100 are rotated.
- the surface of the disk is dried by frictional heat between the polishing pad 24 and the optical disk 100, and the optical disk 100 is wiped up by the polishing pad 24.
- the repaired optical disc 100 can be made clean without the labor of the operator, and the workability is very high.
- a polishing agent supply pump 40 that intermittently supplies the polishing agent between the polishing pad 24 and the disk 100 to be repaired during polishing, while being a dry repair device that holds the polishing agent on the polishing pad 24 and performs polishing.
- the polishing water supply pump 30 for replenishing water evaporated by heat generated by friction, the amount and physical properties of the abrasive present between the polishing pad 24 and the disk 100 to be repaired are appropriately maintained over a long period of time. It has a higher repair capability than the conventional dry repair device. Note that the same high restoration capability can be realized only by the abrasive supply pump 40 without using the polishing water supply pump 30, but in this case, a large amount of expensive abrasive is used, so that the repair cost becomes high.
- polishing pads 24a and 24b are contaminated in a short time by a large amount of abrasive, it is necessary to replace the polishing pads 24a and 24b with high frequency.
- the present invention is not limited to the above-described embodiments, and appropriate modifications are allowed within the scope of the gist of the present invention.
- the abrasive or polishing water may be supplied to the polishing pad instead of the reading surface of the optical disk.
- the polishing water is not limited to water, and may be water obtained by adding a slight amount of a surfactant, or a mixture of a liquid such as an alcohol having a surface active effect and volatility, and water.
Abstract
Description
図10(a)(b)は、いずれも光ディスクの読み出し面を上にした状態の拡大断面図であり、図9中の円Aで囲んだ領域に相当する。図10(a)は読み出し面表面に傷160が付いた状態を示し、図10(b)はその部分を削り取った状態を示している。
このように略傷の深さに相当する厚さ分、ディスク表面を削り取り鏡面研磨する事により、光ディスクは修復する事ができる。
研磨剤が保持された研磨パッドと被修復ディスクを接触状態で互いに相対的に回転させることにより被修復ディスクの読み出し面を研磨する乾式の光ディスク修復装置であって、
a)被修復ディスクの読み出し面又は研磨パッドに研磨剤を供給する研磨剤供給手段と、
b)被修復ディスクの読み出し面又は研磨パッドに研磨用水を供給する研磨用水供給手段と、
c)研磨中の研磨パッドに保持されている研磨剤の量を維持するために前記研磨剤供給手段を間欠的に動作させるとともに、研磨熱により蒸発した研磨剤の水分を補給するために前記研磨用水供給手段を間欠的に動作させる供給制御手段と、
を備えることを特徴とする。
研磨剤が保持された研磨パッドと被修復ディスクを接触状態で互いに相対的に回転させることにより被修復ディスクの読み出し面を研磨する乾式の研磨工程を有する光ディスク修復方法であって、
前記研磨工程が、
a)研磨中の研磨パッドに保持されている研磨剤の量を維持するために、被修復ディスクの読み出し面又は研磨パッドに研磨剤を間欠的に供給する研磨剤供給工程と、
b)研磨熱により蒸発した研磨剤の水分を補給するために、被修復ディスクの読み出し面又は研磨パッドに研磨用水を間欠的に供給する研磨用水供給工程と、
を有することを特徴とする。
バフと研磨剤による研磨は、バフとディスクの間に適量の研磨剤が適切な物性で存在する際に期待通りの研磨能力を持つが、同研磨は発熱を伴う為、すぐに乾燥が進行し適切な物性を保てる時間は僅かしかない。そのため、例えば被修復ディスクを1μm研磨するためには、研磨剤の塗布と研磨を複数回繰り返す必要があり、作業者の手間が掛かる。
一方、本発明による修復装置は、研磨中の研磨面に研磨剤を供給する研磨剤供給手段を備えるため、一研磨工程の間に複数回研磨剤を供給できる。更に、研磨中の研磨面に微量の水分を供給する研磨用水供給手段を備えるため、研磨剤の乾燥により低下する研磨能力を回復させることができる。従って、長期間にわたり研磨力を維持する事が可能であり、作業者の手を煩わせることなく、深い傷の修復が可能である。
研磨剤を保持する研磨剤タンク47は後述する研磨剤供給ポンプ40を介して、研磨剤を光ディスク100表面に供給する2つの研磨剤供給ノズル26a、26bに接続している。研磨用水を保持する研磨用水タンク37は同じく詳細を後述する研磨用水供給ポンプ30を介して、研磨用水を光ディスク100表面に供給する2つの研磨用水供給ノズル27a、27bに接続している。
モータ53、研磨用水供給ポンプ30、開蓋機構23等は制御部22の指示に従って動作する。
なお、本実施例では研磨パッド24a、24b、研磨剤供給ノズル26a、26b、研磨用水供給ノズル27a、27bは共に2つ用いる例を示したが、それぞれ1つ以上あれば機能を達成することはできる。
その他に、パッド保持部に複数のコイルばねを組み込む方法や、パッドにスポンジのように適切な弾力を有するものを用い、その弾力を利用する方法等でも良い。
修復装置10の待機状態において、上蓋20は図1で破線で示すように開いた状態で待機している。
その状態で、読み出し面を上に向けた被修復光ディスク100を修復テーブル21に置き、上蓋20を閉じて修復を開始する。このとき、まず制御部22の指示に従ってモータ53が回転を始め、同時に研磨剤供給ポンプ40が動作を開始し、光ディスク100の上面に2つの研磨剤供給ノズル26a、26bから研磨剤が所定のタイミングで1滴又は数滴程度ずつ滴下される。研磨剤は回転する光ディスク100と研磨パッド24a、24bの間に入り込み、研磨が開始する。
研磨剤が乾燥すると光ディスク100を削り取る能力が消失するため、適当な時間が経過したら制御部22は研磨用水供給ポンプ30を動作させ、水分(研磨用水)を光ディスク100の上面に所定のタイミングで1滴又は数滴程度ずつ滴下する。研磨用水は上記研磨剤と同様に、回転する光ディスク100の上面に滴下され、光ディスク100と研磨パッド24a、24bの間に入り込む。これにより、研磨剤の乾燥を防ぐことができ、長時間にわたって研磨剤の研削能力を保つことができる。また、適時研磨剤を供給する事により、強い研削能力を長時間維持できる。
なお、修復が終了し光ディスク100に研磨パッド24a、24bが接触した状態でモータ53の回転を停止させてから上蓋20を開くと、光ディスク100の表面に研磨パッド24a、24bの痕跡が残リ易い。そこで、制御部22はモータ53を停止する前に開蓋機構23により上蓋20を開き、研磨パッド24と光ディスク100を非接触状態にすることが望ましい。これにより、光ディスク100の読み出し面に研磨パッド24の接触痕が残らない。
図3は研磨剤供給ポンプ40の概要を示す斜視図である。一部が開放された円環状のハウジング41の内壁には、研磨剤の流路である柔軟な樹脂でできたチューブ42が沿わせてある。ハウジング41の内側には中心に空けられた開口にモータ53のシャフト54が挿通されているロータ44が配置されている。ロータ44の縁部には複数のローラ43a、43bが取り付けられており、ローラ43a、43bはそれぞれチューブ42をハウジング41の内壁との間で押しつぶしている。ロータ44は、後述する減速機51を経てモータ53に接続され、減速機51が後述する所定の状態のときにモータ53が回転するとロータ44も回転する。
減速機51の中心部にはモータ53のシャフト54があり、同シャフト54は板状のレバー55に空けられた長円状の貫通孔551に挿通されている。レバー55上面の中央付近にはアイドラ(遊動輪)56が回転自在に取り付けられている。レバー55の端部には電磁ソレノイド59のプランジャ60が取り付けられている。
プランジャ60が前後に移動すると、レバー55はシャフト54の回転中心54aとは異なる位置55aを回転中心として、シャフト54と貫通孔551の互いの側面が接触しない範囲で往復移動する。この往復移動により、シャフト54とアイドラ56が離間したり(図6(a))、接触したり(図6(b))する。
アイドラ56の回転軸はレバー55を貫通しており、その下端には外歯ギヤ57が連結されている。外歯ギヤ57の周囲には、レバー55の回転中心(位置55a)と同じ位置を中心に回転する内歯ギヤ58があり、同内歯ギヤ58と外歯ギヤ57は常時噛み合っている。内歯ギヤ58の下面には中央が開口する円盤61が固定されており、円盤61の下面にはローラ43a、43bが回転自在に取り付けられている。
この際、シャフト54の直径を10mm、アイドラ56の直径を40mm、外歯ギヤ57の歯数を15、内歯ギヤ58の歯数を60とすると、シャフト54の1/16の回転速度で内歯ギヤ58は回転する。
このように、研磨剤供給ポンプ40はソレノイド59への通電がなされている間、モータ53を駆動源とするチューブポンプとして機能し、研磨剤タンク47に蓄えられている研磨剤を研磨剤供給ノズル26に送出する。なお、ソレノイド59への通電がなされていない間は、図示しないバネの作用によってプランジャ60が元の位置(図6(a)に示す位置)に戻され、シャフト54とアイドラ56が離間するため、ローラ43a、43bはその位置で停止し、研磨剤供給ポンプ40の動作が停止する。
この不都合は図1の研磨剤供給ポンプ40において、研磨剤供給ノズル26a、26b毎に独立した2本のチューブ42をハウジング41とローラ43の間に配置することにより解消することができる。
例えば、制御部22内のメモリ等に装置の稼働履歴を記録し、当日最初の研磨を行う場合には研磨剤や研磨用水の供給量を多めにしたり、既にその日に何回も研磨を行っている場合にはそれまでの研磨回数や前回の研磨終了時からの経過時間等に応じてそれらの供給量を調節してもよい。
また、温度センサや湿度センサにより装置内又は装置周囲の気温又は湿度を測定し、その測定値に応じて、研磨剤が乾燥しやすい状況のときには研磨剤や研磨用水の供給量を多めにしたり、逆に乾燥しにくい状況のときにはそれらの供給量を少なめにしたりしてもよい。
このような調節により、研磨剤や研磨用水の供給量を研磨時の状況に応じた最適な量にすることができる。
もちろんこれは一例に過ぎず、1回の吐出量を増やして吐出間隔を広げたり、逆に1回の吐出量を減らして吐出間隔を狭めたり、総吐出量を多く又は少なくしたり、装置の稼働履歴や気温、湿度等に応じて吐出量や吐出間隔を変更したり、修復モード毎に1回の吐出量や吐出間隔を変えたり、修復時間の設定を段階的にではなく連続的に行ったりしてもよい。また、吐出間隔は周期的でなくても間欠的であればよい。
乾拭きに割り当てる時間についても20秒というのは一例であって、例えば空気が乾燥している場合には短く(例えば10秒に)したり、3分モードのときや既に何度も修復作業を行っているときのように研磨パッド24がかなり濡れている場合には長く(例えば30秒に)したりしてもよい。
具体的には、モータ53や研磨剤供給ポンプ40、研磨用水供給ポンプ30のオン/オフを制御する制御部22が、修復の最終段階では研磨用水及び研磨剤の供給を停止させた状態で研磨パッド24と光ディスク100を回転させる。これにより、研磨パッド24と光ディスク100の摩擦熱でディスク表面が乾燥し、光ディスク100が研磨パッド24で拭き上げられる。そのため、作業者の手間を掛けずに修復後の光ディスク100をクリーンな状態にすることができ、作業性が非常に高い。
なお、同様の高い修復能力は研磨用水供給ポンプ30を使わずに研磨剤供給ポンプ40のみでも実現できるが、その場合、高価な研磨剤を大量に使うため修復費用が高額になる。また、大量の研磨剤により研磨パッド24a、24bが短時間で汚れてしまうため、研磨パッド24a、24bを高い頻度で交換する必要がある。これらの問題は本発明による修復装置10のように研磨用水供給ポンプ30を用いることにより解消できる。
20…上蓋
21…修復テーブル
22…制御部
23…開蓋機構
24a、24b…研磨パッド
241…研磨パッド保持部
26a、26b…研磨剤供給ノズル
27a、27b…研磨用水供給ノズル
28…軸受け部
30…研磨用水供給ポンプ
31a、31b…弁
32…チューブ
33…プッシャー
34、59…電磁ソレノイド
37…研磨用水タンク
38…噴霧ヘッド
40…研磨剤供給ポンプ
41…ハウジング
42…チューブ
43a、43b…ローラ
44…ロータ
45、51…減速機
46、53…モータ
47…研磨剤タンク
54…シャフト
55…レバー
56…アイドラ
57…外歯ギヤ
58…内歯ギヤ
60…プランジャ
61…円盤
100…光ディスク
120…基板
130…情報記録層
140…カバー層
150…ハードコート層
160…傷
Claims (11)
- 研磨剤が保持された研磨パッドと被修復ディスクを接触状態で互いに相対的に回転させることにより被修復ディスクの読み出し面を研磨する乾式の光ディスク修復装置であって、
a)被修復ディスクの読み出し面又は研磨パッドに研磨剤を供給する研磨剤供給手段と、
b)被修復ディスクの読み出し面又は研磨パッドに研磨用水を供給する研磨用水供給手段と、
c)研磨中の研磨パッドに保持されている研磨剤の量を維持するために前記研磨剤供給手段を間欠的に動作させるとともに、研磨熱により蒸発した研磨剤の水分を補給するために前記研磨用水供給手段を間欠的に動作させる供給制御手段と、
を備えることを特徴とする光ディスク修復装置。 - a)研磨パッドを保持する研磨パッド保持部が下面に取り付けられた天蓋と、
b)前記天蓋を開けるための開蓋機構と、
c)被修復ディスクの研磨終了後に前記開蓋機構を作動させる開蓋制御手段と、
を備えることを特徴とする請求項1に記載の光ディスク修復装置。 - 前記開蓋制御手段が、被修復ディスク及び研磨パッドの回転が停止する前に前記開蓋機構を作動させるものであることを特徴とする請求項2に記載の光ディスク修復装置。
- 前記研磨剤供給手段が、
a)研磨剤の吐出口である複数の研磨剤供給ノズルと、
b)前記研磨剤供給ノズル毎に独立した流路を通じて各研磨剤供給ノズルに研磨剤を送出する研磨剤供給ポンプと、
を有するものであることを特徴とする請求項1~3のいずれかに記載の光ディスク修復装置。 - 前記研磨剤供給手段が、研磨剤の不要な垂を防止するためのサックバック機能を有するものであることを特徴とする請求項1~4のいずれかに記載の光ディスク修復装置。
- 被修復ディスク及び研磨パッドの回転を停止させるタイミングを制御する回転停止制御手段を備えるとともに、
a)前記供給制御手段が、被修復ディスクの研磨が終了すると、研磨剤及び研磨用水の供給を停止させるものであり、
b)前記回転停止制御手段が、被修復ディスクと研磨パッドの間の研磨剤を研磨熱で乾燥させてから該被修復ディスクを該研磨パッドで乾拭きするために、前記供給制御手段により研磨剤及び研磨用水の供給が停止されてから所定時間経過後に該被修復ディスクと該研磨パッドの回転を停止させるものであることを特徴とする請求項1~5のいずれかに記載の光ディスク修復装置。 - 前記研磨用水供給手段が、
a)研磨用水を所定の一方向に流すための弁を両端に有する柔軟性のあるチューブと、
b)前記チューブの側方に配置されたプッシャーと、
c)前記プッシャーで前記チューブ側面を押し潰して該チューブ内の研磨用水を前記所定の一方向に送出するために、前記プッシャーを動作させる駆動機構と、
を備えることを特徴とする請求項1~6のいずれかに記載の光ディスク修復装置。 - 前記供給制御手段が、研磨剤又は研磨用水の吐出量又は吐出間隔を調節する吐出条件調節手段を有するものであることを特徴とする請求項1~7のいずれかに記載の光ディスク修復装置。
- 装置の稼働履歴を記録する記録手段を備えるとともに、
前記吐出条件調節手段が、前記記録手段に記録された稼働履歴に応じて、研磨剤又は研磨用水の吐出量又は吐出間隔を調節するものであることを特徴とする請求項8に記載の光ディスク修復装置。 - 気温又は湿度を測定するための測定手段を備えるとともに、
前記吐出条件調節手段が、前記測定手段の測定値に応じて、研磨剤又は研磨用水の吐出量又は吐出間隔を調節するものであることを特徴とする請求項8又は9に記載の光ディスク修復装置。 - 研磨剤が保持された研磨パッドと被修復ディスクを接触状態で互いに相対的に回転させることにより被修復ディスクの読み出し面を研磨する乾式の研磨工程を有する光ディスク修復方法であって、
前記研磨工程が、
a)研磨中の研磨パッドに保持されている研磨剤の量を維持するために、被修復ディスクの読み出し面又は研磨パッドに研磨剤を間欠的に供給する研磨剤供給工程と、
b)研磨熱により蒸発した研磨剤の水分を補給するために、被修復ディスクの読み出し面又は研磨パッドに研磨用水を間欠的に供給する研磨用水供給工程と、
を有することを特徴とする光ディスク修復方法。
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PCT/JP2009/004270 WO2011024241A1 (ja) | 2009-08-31 | 2009-08-31 | 光ディスクの修復方法及び修復装置 |
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US (1) | US8342905B2 (ja) |
EP (1) | EP2474978B1 (ja) |
JP (1) | JP5256474B2 (ja) |
CN (1) | CN102067216B (ja) |
ES (1) | ES2618180T3 (ja) |
WO (1) | WO2011024241A1 (ja) |
Cited By (1)
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JP2012223852A (ja) * | 2011-04-19 | 2012-11-15 | Hamai Co Ltd | 両面研磨装置および研磨方法 |
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KR20140049547A (ko) * | 2011-07-14 | 2014-04-25 | 딕 이미징 프로덕츠 유에스에이 엘엘씨 | 고굴절률 자외선 경화성 코팅을 이용한 손상된 광학 기판 복원방법 및 조성물 |
US20130181465A1 (en) * | 2012-01-17 | 2013-07-18 | Elm Inc. | Optical disc restoration method and system |
US9754622B2 (en) * | 2014-03-07 | 2017-09-05 | Venmill Industries Incorporated | Methods for optimizing friction between a pad and a disc in an optical disc restoration device |
US9620166B2 (en) * | 2012-05-18 | 2017-04-11 | Venmill Industries | Methods for restoring optical discs |
WO2013173559A1 (en) * | 2012-05-18 | 2013-11-21 | Venmill Industries | Device, methods and systems for restoring optical discs |
US9837120B2 (en) | 2014-03-07 | 2017-12-05 | Venmill Industries Incorporated | Vapor and heat removal systems in an optical disc restoration device |
JP6523872B2 (ja) * | 2015-08-27 | 2019-06-05 | 株式会社ディスコ | 研削装置 |
CN110625517B (zh) * | 2019-07-29 | 2021-04-09 | 华灿光电(浙江)有限公司 | 衬底平整度检测仪的修复装置和方法 |
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Also Published As
Publication number | Publication date |
---|---|
CN102067216A (zh) | 2011-05-18 |
ES2618180T3 (es) | 2017-06-21 |
EP2474978A4 (en) | 2013-07-31 |
US8342905B2 (en) | 2013-01-01 |
EP2474978A1 (en) | 2012-07-11 |
CN102067216B (zh) | 2013-03-13 |
US20110143636A1 (en) | 2011-06-16 |
JP5256474B2 (ja) | 2013-08-07 |
EP2474978B1 (en) | 2016-12-07 |
JPWO2011024241A1 (ja) | 2013-01-24 |
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