JP3411530B2 - Method and apparatus for manufacturing information disk - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc manufacturing method and an optical disc manufacturing apparatus having a plurality of recording surfaces.

[0002]

2. Description of the Related Art Techniques for increasing the recording capacity of optical discs have been developed and popularized, and the recording capacity tends to be further increased. For example, an optical disc that has a four-layer structure and records two layers on each side.
There is a recording capacity of 17GB called -18. As a method of manufacturing this type of optical disc, for example, Japanese Patent Laid-Open No. 10-2836
There is one disclosed in Japanese Patent Publication No. 82 or Japanese Patent Publication No. 8-23941. In the optical disc manufacturing methods shown in these figures, a stamper is used for each layer in the manufacturing process of any recording surface, the interface between the stamper and the adhesive layer is peeled off, and information is transferred to the adhesive layer by a pit train. Then, a reflective film is formed on the adhesive layer surface on which the pits are formed.

In such a manufacturing method, since the steps using the stamper must be sequentially performed a plurality of times, the length of all the manufacturing steps becomes longer. Further, the process using the stamper needs to be strictly controlled in a clean room, and it is not efficient to alternately provide the process using the stamper with the process of bonding, which has different properties.

In order to solve such a problem, the following disk manufacturing method has been proposed. This manufacturing method uses a disk substrate 1 which finally becomes one side of the information disk and a dummy disk 2 which is peeled and removed in a later step, as shown in the cross section of the disk in FIG. The disk substrate 1 is the same as a normal one, and is made of a transparent plastic material such as polycarbonate, and a semi-transmissive reflective film formed by thinly depositing pits 1a for recording information on one surface and gold. It comprises a membrane 1b.

The dummy disk 2 is formed by molding a material such as polymethyl methacrylate resin.
A pit 2a for recording information and a reflective film 2b formed by thinly depositing aluminum are provided on one surface thereof. The dummy disk 2 has substantially the same shape, size and thickness as the disk substrate 1.

The reflective substrates 1b and 2b of the disc substrate 1 and the dummy disc 2 are adhered to each other via an adhesive layer 3 made of an ultraviolet curable adhesive. In this case, the adhesive strength at the interface between the disk substrate 1 and the reflection film 1b is such that the dummy disk 2 is made of a material such as polymethylmethacrylate resin which is easily peeled off from the reflection film 2b, so that the dummy disk 2 and its reflection It is smaller than any of the adhesive strength at the boundary with the film 2b, the adhesive strength at the interface between the adhesive layer 3 and the reflective film 1b of the disc substrate 1, and the adhesive strength at the boundary between the adhesive layer 3 and the reflective film 2b, and is easy to peel off. There is.
Reference numeral 4 denotes a central hole of the disk substrate 1 and the dummy disk 2.

After the disk substrate 1 and the dummy disk 2 are bonded together in this way, a peeling force is applied between them to separate the dummy disk 2 between the dummy disk 2 and its reflection film 2b. Remove. In this state, a recording layer 1a such as pits, a reflective film 1b, an adhesive layer 3, a recording layer 2a, and a reflective film 2b are sequentially provided on one surface of the disc substrate 1. By laminating two disc substrates having such a structure so that the recording layer and the reflection film are located inside, a DVD having a recording capacity of 17 GB called DVD-18 as described at the beginning can be obtained.

However, since it is practically impossible to sufficiently reduce the adhesive strength at the interface between the dummy disk 2 and the reflective film 2b, it must be applied between the peeling external force of a certain size or more. I won't. At this time, when the dummy disk 2 is peeled off, the disk substrate 1
It must be a peeling method that does not adversely affect the product and is suitable for mass production.

[0009]

Therefore, according to the present invention, when the dummy disk is peeled off as described above,
An object of the present invention is to provide a manufacturing method of an information disk which does not substantially affect the recording film and the reflective film of the disk substrate and is suitable for mass production, and a manufacturing apparatus which realizes the manufacturing method.

[0010]

In order to solve this problem, the method according to the first claim produces an information disk substrate having a first reflective film and a second reflective film that reflect light. In the method, a disk substrate having information recorded on one side and having the first reflective film and a dummy disk having information recorded on one side and having the second reflective film are bonded by an adhesive. And a dummy disc is partially preliminarily peeled between the second reflective film and the dummy disc by applying a mechanical force from the central aperture between the disc substrate and the dummy disc. The second step of performing the second step, and supplying compressed gas from the central opening between the disk substrate and the dummy disk partially preliminarily peeled off by the second step to move the dummy disk to the disk. Third peeling and removing from substrate
The present invention proposes a method for manufacturing an information disc, which comprises the steps of

A method according to a second aspect is a method of manufacturing an information disk substrate having a first reflective film and a second reflective film for reflecting light, wherein information is recorded on one side and the first disk is used. First step of adhering a disk substrate having a reflective film of 1) and a dummy disk having information recorded on one side thereof and having the second reflective film with an adhesive, and the disk substrate and the dummy each having a central opening. Between the disk and the dummy disk, a mechanical force is applied from the central opening to partially expand the space between the disk substrate and the dummy disk, and compressed gas is supplied from the central opening to the disk substrate and the dummy disk. And a second step of peeling and removing the dummy disk from the disk substrate by supplying the dummy disk to the dummy disk. It is a thing.

An apparatus according to a third aspect is an apparatus for manufacturing an information disk substrate having a first reflective film and a second reflective film that reflect light, wherein information is recorded on one side and the first disk is used. Laminating apparatus for laminating a disc substrate having a reflective film of the above and a dummy disc having information recorded on one side thereof and having the second reflecting film with an adhesive, and the disc substrate laminated from the laminating apparatus And a pedestal having a means for receiving the dummy disk and adsorbing the disk substrate, and pressing the space between the disk substrate and the dummy disk from the central opening side thereof to partially peel the dummy disk from the disk substrate. The preliminary peeling means, and the compressed gas is supplied between the partially peeled disk substrate and the dummy disk. Peel off the dummy disk from
The present invention proposes an information disk manufacturing apparatus characterized by comprising a peeling means for removing the information disk.

According to a fourth aspect of the present invention, in the apparatus according to the third aspect, the preliminary peeling means rotates the turntable intermittently to sequentially send the disc substrate and the dummy disc to respective positions when the turntable is stopped. The present invention proposes an information disk manufacturing apparatus characterized in that the information disc manufacturing apparatus is characterized in that it is raised through the opening of (1), performs the preliminary peeling operation, and then lowered.

According to a fifth aspect of the present invention, in the apparatus according to the third or fourth aspect, the preliminary peeling means includes a plurality of divided wedge members that perform expansion / contraction operations in central openings of the disk substrate and the dummy disk. The present invention proposes an information disk manufacturing apparatus characterized in that, when performing preliminary peeling, the wedge member performs an operation of enlarging the diameter so that the tip end of the wedge member enters between the disk substrate and the dummy disk. Is.

According to a sixth aspect of the present invention, in the apparatus according to any one of the third to fifth aspects, the peeling means includes a pressure chamber communicating from a central opening of the disc substrate and the dummy disc between the substrates, and the pressure chamber. It is an object of the present invention to propose an information disc manufacturing apparatus characterized by comprising a compressed gas supply source for supplying compressed gas to a pressure chamber.

A device according to a seventh aspect is a device for manufacturing an information disk substrate having a second reflective film and a second reflective film for reflecting light, wherein information is recorded on one side and the first disk is used. Laminating apparatus for laminating a disc substrate having a reflective film of the above and a dummy disc having information recorded on one side thereof and having the second reflecting film with an adhesive, and the disc substrate laminated by the laminating device And a pedestal having a means for receiving the dummy disk and adsorbing the disk substrate, and pressing the space between the disk substrate and the dummy disk from the central opening side thereof to partially peel the dummy disk from the disk substrate. Mechanical peeling means, and the disk substrate and the dummy disk in a state of being partially peeled and expanded by the mechanical peeling means. And a gas stripping means for stripping the dummy disk from the disk substrate by supplying compressed gas between the two.

According to an eighth aspect of the present invention, in the apparatus according to the seventh aspect, the mechanical peeling means includes a plurality of divided wedge members that perform expansion / contraction operations at central openings of the disk substrate and the dummy disk. When performing the conventional peeling, the wedge member performs a diameter expanding operation to enlarge the diameter, and the tip of the wedge member enters between the disc substrate and the dummy disc. It is a proposal.

[0018]

1 to 6 are diagrams showing an embodiment of an apparatus for realizing a first embodiment of an optical disc manufacturing method according to the present invention. Hereinafter, description will be given based on these figures.

First, FIG. 1 is a schematic view of an overall view of a manufacturing apparatus related to the present invention, and 10 is a normal bonding in which the disk substrate 1 and the dummy disk 2 shown in FIG. 9 are bonded together by an adhesive layer 3. Aligning device 11, reference numeral 11 is a turntable having a plurality of functional positions to be described below, reference numeral 12 is a disk transfer mechanism for transferring the bonded disk substrate 1 and dummy disk 2 from the bonding device 10 to the disk receiving position 11a of the turntable 11. , 13
Is an adhesive removing mechanism for removing the adhesive protruding from between the disk substrate 1 and the dummy disk 2 when the disk moves from the receiving position 11a to the adhesive removing position 11b as the turntable 11 rotates.
Is a charge removing / cleaning mechanism for removing dust and the like adhering to the disc at the cleaning position 11c, and 15 is the receiving position 11 where the disc is on the turntable 11.
Since the dummy disc 2 is conveyed downward and the disc substrate 1 is conveyed upward so as not to be damaged from the position a to the reversal position 11d, these are conveyed to the reversal position 11d.
This is a reversing mechanism which is reversed by pushing the dummy disk 2 upward.

Next, reference numeral 16 denotes a mechanical pre-peeling mechanism which is a main part of the present invention. As will be described later in detail, a mechanical pre-peeling mechanism is provided between the disk substrate 1 and the dummy disk 2 at the pre-peeling position 11e. Apply force to partially peel. 1
Numeral 7 blows compressed gas between the disc substrate 1 and the dummy disc 2 which are partially peeled by the mechanical preliminary peeling mechanism 16 to completely peel them, and the peeled dummy disc 2 is recycled from the peeling position 11f. A gas pressure peeling mechanism for discharging to the box 18, 19 is a charge removing / cleaning mechanism for removing charged electric charges and dust on the disk at the charge removing position 11g, and 20 is processing the adhesive on the inner and outer peripheral portions of the disk substrate 1. As described above, this is an adhesive agent processing mechanism that does not cause a trouble as a DVD when the two disk substrates 1 are bonded together.

Hereinafter, a specific configuration of the mechanical preliminary peeling mechanism 16 and a preliminary peeling method will be described with reference to FIGS. 2 to 6. It should be noted that the three wedge portions 16 shown in FIGS.
Since a1, 16a2, and 16a3 have the same configuration and perform the same operation, they are treated as wedge portions 16a in other drawings for convenience of description. FIG. 2 shows the state of the preliminary peeling position 11e. When the turntable 11 stops at the preliminary peeling position 11e, the opening of the turntable 11 (not shown).
The disk pedestal 21 and the mechanical preliminary peeling mechanism 16 are raised through the above, and the bonded disk substrate 1 and dummy disk 2 on the turntable are supported by the disk pedestal 21. In this state, the mechanical preliminary peeling mechanism 16 The wedge portion 16a, which is the head portion, is located in the central hole 4 of the disc substrate 1 and the dummy disc 2. The level of the tip portion 16a 'of the wedge portion 16a of the mechanical preliminary peeling mechanism 16 is set so as to be within the gap between the disk substrate 1 and the central hole 4 of the dummy disk 2.

The main part of the mechanical preliminary peeling mechanism 16 is composed of three wedge portions 16a1, 16a2, 16a3 capable of expanding and contracting with the same structure as shown in FIGS.
Each of these wedge portions has a fan-shaped plane figure that spreads at an angle of 120 degrees. Three wedge parts 16a1, 16a2
16a3 is integrally formed with and supported by the corresponding pillar portion 16b. And three pillar parts 16b
Is connected to a normal drive mechanism (not shown) so that it can perform expansion / contraction operation and ascending / descending operation. Further, when the three wedge portions 16a1, 16a2, 16a3 are reduced in diameter, that is, in the state where they are in contact with each other, the maximum diameters of the wedge portions are the inner diameters of the central hole 4 of the disc substrate 1 and the dummy disc 2 and the opening of the disc pedestal 21. It is made to be smaller than.

Here, the angle θ of the three wedge portions 16 a of the disc substrate 1 is, for example, 30 °, and considering the diameter of the central hole 4 of the disc substrate 1, the range of 25 ° to 45 ° is preferable. However, the wedge shape of the wedge portion 16a does not have to be limited to the one shown in the drawing, and may have a substantially vertically symmetrical angle.

When the turntable 11 is stopped at the pre-separation position 11e, although not shown, the three wedge portions 16a in the reduced diameter state rise through the openings of the turntable 11 and the disk pedestal 21, and each wedge portion 16a. As shown in FIG. 2, the tip end 16a 'of the bonded disc substrate 1 is supported on the disc pedestal 21 on the turntable without contacting the inner peripheral surfaces 1a and 2a of the disc substrate 1 and the dummy disc 2. And the dummy disk 2 is stopped at the level where the tip 16a 'of the wedge portion is located in the space X between the dummy disk 2 and the dummy disk 2. In this state, since the suction is performed through the suction passage 22 provided in the disc pedestal 21, the disc substrate 1 is adsorbed to the disc pedestal 21 and is stably positioned.

Next, by a driving device (not shown), the three wedge portions 16a perform a diameter expansion operation, that is, an outward radial movement as shown in FIGS. 4 and 5, and the tips 16a of the respective wedge portions 16a. 'Enters the space X between the disk substrate 1 and the dummy disk 2 and gives a pushing force. As a result, as shown in FIG. 6 in which only the left side of FIG. 5 is enlarged, the adhesive strength at the boundary between the disk substrate 1 and its reflective film 1b and the adhesive strength at the interface between the adhesive layer 3 and the reflective film 1b of the disk substrate 1 are increased. Peeling Y occurs at the inner peripheral portion of the interface between the dummy disk 2 and the reflective film 2b, which has a smaller adhesive strength than any of the adhesive strengths at the boundary between the adhesive layer 3 and the reflective film 2b.

What is important here is that the arcuate outer peripheries of the three wedge portions 16a in the expanded state lie substantially on the same virtual circumference. As a result, the three wedge portions 16a can apply a substantially uniform force to the gap X between the disc substrate 1 and the dummy disc 2 along the inner circumference, and the external force is concentrated on only a part of the disc substrate 1. Since the external force does not become strong, almost uniform peeling occurs between the disk substrate 1 and the dummy disk 2 along the inner circumference thereof. This does not have a bad influence on the disc substrate 1, and facilitates complete peeling of the disc substrate 1 and the dummy disc 2 described below.

Next, the disk substrate 1 and the dummy disk 2 that have been mechanically preliminarily peeled off as described above are shown in FIG.
It is completely peeled off by a device as shown in. FIG. The peeling device 25 is roughly composed of a head 26 for mounting the disk substrate 1 and the dummy disk 2 and a head pin 27. The head 26 is a metallic cylindrical object having a disk-shaped upper surface structure similar to a so-called turntable for a record, and a pressurizing chamber 26A is provided in the central upper part. This pressurizing chamber 26A
An inlet 26B that is connected to the valve and acts as an air passage for applying air pressure. An annular rim 26C that surrounds the pressure chamber 26A is provided on the upper surface of the head 26, and the center hole 4 of the disk substrate 1 is inscribed on the outer circumference of the rim 26C. An annular relief groove 26D is provided on the outer periphery of the rim 26C. In the disk portion further outside the escape groove 26D, for example, suction holes 26E vertically penetrate at positions at intervals of 45 ° concentric with the central hole. The bottom of the head 26 forms a vacuum chamber 28 while
The fitting portions 29 are fastened with bolts (not shown) at the fitting portions 29, and are airtightly fitted to the base block 30.

The head pin 27 is a metal top-shaped object, and has a head 27 A and a head 27, the diameter of which is slightly smaller than the diameter of the central hole 4 of the disk substrate 1 and the dummy disk 2.
A shaft portion 27B for supporting A and a fixing portion 27C for fixing the shaft portion 27B to the bottom portion of the pressure chamber 26A of the head 26 by a screw portion (not shown). The shaft portion 27B is a cylinder having a diameter smaller than the diameter of the central hole 4 of the disk substrate 1 and the dummy disk 2, and forms a pressure chamber 26A between the shaft portion 27B and the vertical inner wall of the head 26.

Further, the head portion 27 A has such a size that it can slide with respect to the inner peripheral wall of the central hole 4 of the disc substrate 1 and the dummy disc 2. Therefore, it can be mounted on the head 26 from above the head pin 27 through the central hole 4 of the disk substrate 1 and the dummy disk 2. At this time, the head portion 27A serves as a guide and the central hole of the dummy disk 2 is placed. Since the edge of is in contact with the head portion 27A, the pressurizing chamber 26A substantially forms an airtight chamber.

The peeling device 2 configured as described above
When the dummy disk 2 is peeled off by using the disk 5, first, the airflow passage 30A formed in the base block 30 is evacuated by a vacuum source (not shown), and the vacuum chamber 28 connected thereto is evacuated. The substrate 1 and the dummy disk 2 are sucked by the suction holes 26E and fixed to the upper surface of the head 26 by suction.

Thereafter, when an air pressure of, for example, 5 kg / square centimeter is applied from a compressed air source (not shown) through the inlet 26B, this compressed air is supplied into the pressurizing chamber 26A through the path indicated by the arrow. As can be seen from FIG. 7, the information recording layer and the adhesive layer are not formed on the central hole 4 side of the disk substrate 1 and the dummy disk 2 by a predetermined dimension from the central hole, so that there is a space between both disks. The compressed air from the pressure chamber 26A enters the space and acts so as to expand the space between the disk substrate 1 and the dummy disk 2 from the center hole side.

As described above, the gap Y between the disk substrate 1 and the dummy disk 2 on the side of the central hole 4 is already formed by the mechanical preliminary peeling, and the inner circumference of the interface between the surface of the dummy disk 2 itself and the reflective film 2b is already formed. Since it is partially peeled off at the part, the dummy disk 2 is easily peeled off from the reflection film 2b by such a force of expanding the compressed air. This interfacial delamination first delaminates from the delaminated interface near the contact of the pressure chamber 26A, and then rapidly spreads substantially concentrically in the radial outward direction. Since this peeling is performed by air pressure, the possibility of damaging the reflective film 2b at the interface is extremely small.

After that, the base block 30 and the head 26 are lowered by a drive mechanism (not shown), and the disc substrate 1 and the dummy disc 2 are placed on the turntable 11 in the process of lowering. Then, the peeled dummy disk 2 is discharged to the recycle box 18, and the disk substrate 1 having the reflective film 1b and the reflective film 2b left on the surface of the adhesive 3 is left on the turntable 11 for the next charge removal. -Sent to cleaning position 11g.

Although not shown, the two disk substrates 1 thus formed are bonded together by an adhesive so that the reflection films 2b face each other.
An 8 type optical disk can be obtained.

Next, another embodiment of the present invention will be described. In this embodiment, the mechanical preliminary peeling and the fluid peeling in the above-mentioned embodiment are performed at the same position, and the peripheral portions around the central openings of the disk substrate 1 and the dummy disk 2 are expanded by the mechanical force by the partial peeling by the mechanical force. In this state, compressed gas is blown between the disk substrate 1 and the dummy disk 2 to peel off the dummy disk 2 from the reflective film.

This embodiment will be described with reference to FIG. In this embodiment, in addition to the mechanical partial peeling mechanism 16 ′ shown in FIGS. 5 and 6, the mechanical partial peeling mechanism 16 ′ can selectively hold the blow head 31 in the pressurizing space S. Is equipped with. The blow head 31 is a compressed air supply passage 31a connected to a compressed air supply source (not shown),
A normal suction pad 31b, a suction passage 31c for sucking the dummy disk 2 on the suction pad 31b, and a mechanical partial peeling mechanism 16 'are housed, and a trapezoidal cross section is formed to form a space S in which expansion / contraction diameter operation is possible. It has a recess. The compressed air supply passage 31a is connected to a nozzle (not shown).

The nozzle has a mechanical partial peeling mechanism 1
When the three wedge portions 16'a of 6'are in the expanded state as shown in FIG. 4, the nozzle tip of the small diameter in the three directions enters the gap between the three wedge portions 16'a. Parts. The nozzle tips facing the three directions at equal intervals are at a level at which compressed air can be blown directly between the disk substrate 1 and the dummy disk 2. The blow head 31 is connected to a drive mechanism (not shown) through an elastic device such as a spring coil and an air cylinder (not shown), and can be moved up and down by the action of the drive mechanism.

As described above, the three wedge portions 16′a of the mechanical partial peeling mechanism 16 ′ and the column portion 16′b thereof are provided.
Since the expansion / contraction diameter operation is performed in the center hole of the disk pedestal 21, it is necessary to prevent compressed air from escaping from the lower portion of the disk pedestal 21 or the like. Therefore, in this embodiment, a drive mechanism 32 such as an air cylinder for expanding the diameter of the partial peeling mechanism 16 'as shown by the chain line is provided inside the lower portion 16'c of the disk receiving base 21 which is closed except above. It is stored. Then, an air supply pipe for driving the drive mechanism 32 is led out to the outside through a packing (not shown) provided on the side wall of the lower portion 16'c.

Next, the peeling operation will be described.
First, as described above, the mechanical partial peeling mechanism 16 'is operated by the drive mechanism 32 to expand the diameters of the three wedge portions 16'a so that the tips of the wedge portions 16'a are provided between the disc substrate 1 and the dummy disc 2. To partially peel off the inside. On the other hand, after the partial peeling mechanism 16 'operates to expand the diameter of the wedge portion 16'a, the blow head 31 is brought into contact with the upper surface of the dummy disk 2 so that the nozzle and the nozzle tip portion thereof (not shown) are wedge portion 16'. Insert between a. In this state, the suction passage 3
By sucking from 1c, the suction pad 31b sucks the dummy disk 2. Next, compressed air is supplied from the compressed air supply passage 31a, and the compressed air is blown between the disk substrate 1 and the dummy disk 2 from the tip of the nozzle. Here, the pressure applied by the blow head 31 to the dummy disk 2 is smaller than the pressure of the compressed air,
The elastic force of the elastic device is set in this way.

The compressed air enters the separated space between the disk substrate 1 and the dummy disk 2 due to the diameter expansion operation of the plurality of wedge portions 16 ′ a of the mechanical partial peeling mechanism 16 ′, and the blow head 31. The dummy disk 2 is peeled off from the reflective film 2b while pushing up the dummy disk 2 adsorbed thereto. Then blow head 31
Moves up while holding the dummy disk 2 by suction and removes the dummy disk 2. At this time, it is preferable that the dummy disk 2 is not separated from the reflective film 2b by a mechanical force generated by the rise of the blow head 31.

In this embodiment, the blow head 31 is not connected to a drive mechanism (not shown) through an elastic device (not shown) such as a spring or a cylinder, but is directly connected to the drive mechanism. When the blow head 31 is in contact with the upper surface of the dummy disk 2, compressed air is supplied to the compressed air supply passage 31a.
After that, by applying a weak force in the direction of raising the blow head 31, the compressed air passes between the dummy disk 2 and its reflection film 2b to peel the dummy disk 2 as the dummy disk 2 is peeled off.

Further, the wedge portion 16′a of the mechanical partial peeling mechanism 16 ′ does not necessarily have to be divided into three and may be divided into four or more. Furthermore, the nozzle is not always necessary, and the dummy disk 2 can be peeled off by appropriately increasing the pressure in the space S with compressed air without the nozzle.

[0043]

As described above, according to the present invention, D
When a dummy disk is peeled off in the manufacturing process of a VD-18 type optical disk or the like, the dummy disk can be peeled off without substantially affecting the recording film and the reflection film of the disk substrate, and it is suitable for mass production. It is possible to provide a manufacturing method and a manufacturing apparatus that realizes the method.

[Brief description of drawings]

FIG. 1 is a diagram for explaining an embodiment of an optical disk manufacturing apparatus including a preliminary peeling mechanism for an optical disk according to the present invention.

FIG. 2 is a partial cross-sectional view (reduced diameter state) for explaining an embodiment of a preliminary peeling mechanism for an optical disc according to the present invention.

FIG. 3 is a top view (diameter-reduced state) for explaining an embodiment of a preliminary peeling mechanism for an optical disc according to the present invention.

FIG. 4 is a top view (diameter expansion state) for explaining an embodiment of a preliminary peeling mechanism for an optical disc according to the present invention.

FIG. 5 is a partial cross-sectional view (diameter expansion state) for explaining an embodiment of a preliminary peeling mechanism for an optical disc according to the present invention.

FIG. 6 is a partially enlarged sectional view (diameter expansion state) for explaining an embodiment of a preliminary peeling mechanism for an optical disk according to the present invention.
Is.

FIG. 7 is a diagram showing a partial cross section of a gas peeling mechanism for explaining the present invention.

FIG. 8 is a partial cross-sectional view (diameter expansion state) for explaining another embodiment of the peeling mechanism of the optical disc according to the present invention.

FIG. 9 is a diagram showing an optical disc for explaining an embodiment of the invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Disk substrate 2 ... Dummy disk 3 ... Adhesive 4 ... Central hole 10 of disk 10 ... Laminating device 11 ... Turntable 12 ... Disk transfer mechanism 13 ... Adhesive removal mechanism 14 ... Static elimination / cleaning mechanism 15 ... Inversion mechanism 16 ... Mechanical preliminary peeling mechanism 16 '... Mechanical partial peeling mechanism 16a ... Wedge portion 16b ... Strut portion 17 ...・ Gas pressure peeling mechanism 18 ・ ・ ・ Recycle box 19 ・ ・ ・ Electrification / cleaning mechanism 20 ・ ・ ・ Adhesive processing mechanism 21 ・ ・ ・ Disk pedestal 22 ・ ・ ・ Suction passage 25 ・ ・ ・ Peeling device 26 ・ ・-Head 26A-Pressurizing chamber 26A 26B-Inlet 26C-Rim 26D-Escape groove 26E-Suction hole 27-Head pin 28-Vacuum chamber 29-Mating part 30 ... Base block 31 ... Blow head 32 ... Drive device 31a of mechanism 16 '... Compressed air supply path 31b ... Adsorption pad

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP 2000-113519 (JP, A) JP 61-273759 (JP, A) JP 60-107747 (JP, A) JP 10-112070 (JP, A) JP 9-73671 (JP, A) JP 60-47251 (JP, A) JP 1-101129 (JP, A) JP 58-122828 (JP, A) Kaihei 3-225640 (JP, A) JP-A-7-14216 (JP, A) Actual Kaihei 4-54032 (JP, U) International Publication 00/18531 (WO, A1) US Patent 5540966 (US, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G11B 7/26

Claims (8)

(57) [Claims] 1. A method of manufacturing an information disc substrate having a first reflection film and a second reflection film for reflecting light, comprising: a disc substrate having information recorded on one side and having the first reflection film. A first step in which information is recorded on one side and a dummy disk having the second reflective film is attached by an adhesive, and the center is provided between the disk substrate and the dummy disk each having a central opening. A second step of partially preliminarily peeling between the disk substrate and the dummy disk by applying a mechanical force from the opening, and the disc substrate and dummy disk partially preliminarily peeled by the second step And a third step of supplying compressed gas from the central opening to separate and remove the dummy disk from the disk substrate. How to make a disc. 2. A method of manufacturing an information disc substrate having a first reflection film and a second reflection film for reflecting light, comprising: a disc substrate having information recorded on one side and having the first reflection film. A first step in which information is recorded on one side and a dummy disk having the disk substrate is attached by an adhesive, and a machine is provided from the central opening between the disk substrate and the dummy disk each having a central opening. Pressure is applied to the dummy substrate so that the compressed gas is supplied from the central opening between the second reflective film and the dummy disc while partially expanding the space between the disc substrate and the dummy disc. And a second step of peeling the disc from the disc substrate. 3. An apparatus for manufacturing an information disk substrate having a second reflective film and a second reflective film for reflecting light, wherein a disk substrate having information recorded on one side and having the first reflective film. A bonding device that records information on one side and bonds the dummy disk having the second reflective film with an adhesive, and the disk substrate and the dummy disk that are bonded from the bonding device and receives the disk. A pedestal having means for adsorbing the substrate, a preliminary peeling means for partially peeling the dummy disk from the disk substrate by pressing and opening a space between the disk substrate and the dummy disk from the central opening side thereof, Compressed gas is supplied between the disc substrate and the dummy disc separated from each other to remove the dummy disc from the disc substrate. Manufacturing apparatus information disc, characterized in that it comprises a release means for releasing, the. 4. The preparatory peeling means according to claim 3, wherein the preparatory peeling means is intermittently rotated to feed the disc substrate and the dummy disc to respective positions one by one, and when the turntable is stopped, the preparatory peeling means is elevated through the opening of the turntable, An information disk manufacturing apparatus characterized by performing a peeling operation and then descending. 5. The preparatory peeling means according to claim 3 or 4, further comprising a wedge member divided into a plurality of portions for performing expansion / contraction operations at central openings of the disc substrate and the dummy disc. An information disk manufacturing apparatus, wherein the wedge member expands its diameter so that the tip of the wedge member enters between the disk substrate and the dummy disk. 6. The peeling device according to claim 3, wherein the peeling means supplies a pressure chamber communicating from the central opening of the disc substrate and the dummy disc between the substrates, and compressed gas to the pressure chamber. An information disk manufacturing apparatus comprising a compressed gas supply source. 7. An apparatus for manufacturing an information disc substrate having a first reflection film and a second reflection film for reflecting light, wherein a disc substrate having information recorded on one side and having the first reflection film. A bonding device that records information on one side and bonds the dummy disk having the second reflective film with an adhesive, and the disk substrate and the dummy disk that are bonded from the bonding device and receives the disk. A pedestal having means for adsorbing the substrate, and mechanical peeling means for partially peeling the dummy disk from the disk substrate by pushing open the space between the disk substrate and the dummy disk from their central opening side, Before the compressed gas is supplied between the dummy disk and the disk substrate that has been partially peeled and expanded by the mechanical peeling means, Manufacturing apparatus information disc, characterized in that it comprises a gas separating means for separating the dummy disc from the disc substrate. 8. The mechanical peeling means according to claim 7, wherein the mechanical peeling means includes a plurality of wedge members that perform expansion / contraction operations at central openings of the disk substrate and dummy disk, and the wedge is used when partial peeling is performed. A peeling device for an information disc, wherein the member performs a diameter expanding operation for enlarging the diameter so that the tip end of the wedge member enters between the disk substrate and the dummy disk.