JP2000173110A - Integrator for optical disk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the yield of optical disks by suppressing the generation of resin dust at the time of integrating the optical disks or substrates for the optical disks. SOLUTION: A stack pole 10 is constituted by having a base 16 and a pole 18 which is erected on this base plate 16 and is extended and disposed in a direction perpendicular to the front surface of the base 16 and stacks >=1 sheets of the optical disks by inserting the central holes of the optical disks to the pole 18. The surface roughness of the pole 18 is specified to <=20 in Rmax and the perpendicularity of the pole 18 is specified to <=0.4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a base having a base, and a bar member erected on the base and extending in a vertical direction with respect to an upper surface of the base. The present invention relates to an optical disc integrator configured to accumulate one or more optical discs by inserting a center hole of the optical disc into the rod member.

[0002]

2. Description of the Related Art In general, as an optical information recording medium (optical disk) on which information can be recorded only once by a laser beam, there are a write-once CD (so-called CD-R) and a DVD-R. Compared to the production of (compact discs), it has the advantage that a small amount of CDs can be supplied to the market at a reasonable price and quickly, and the demand has increased with the recent spread of personal computers and the like.

A typical structure of a CD-R type optical information recording medium is a recording layer made of an organic dye on a transparent disc-shaped substrate having a thickness of about 1.2 mm, and a light reflection made of a metal such as gold or silver. And a protective layer made of resin in this order.

A DVD-R type optical information recording medium is
It has a structure in which two disc-shaped substrates (having a thickness of about 0.6 mm) are bonded together with their respective information recording surfaces facing inward, and has a feature that the amount of recorded information is large.

For writing (recording) information on these optical information recording media, a laser beam in the near-infrared region (a laser beam having a wavelength of about 780 nm for CD-R and a wavelength of about 635 nm for DVD-R) is irradiated. The irradiation portion of the dye recording layer absorbs the light and locally raises the temperature, causing a physical or chemical change (for example, formation of pits) and changing its optical characteristics. Information is recorded.

On the other hand, information reading (reproduction) is usually
Reflection is performed by irradiating a laser beam having the same wavelength as the recording laser beam, so that the optical characteristics of the dye recording layer are changed between a portion (recorded portion due to pit generation) and a portion not changed (unrecorded portion). The information is reproduced by detecting the difference in rate.

[0007]

SUMMARY OF THE INVENTION CD-RO
In a disk-shaped recording medium such as M, even a small defect does not pose a problem because it is corrected by the error correction function. For example, in the case of a compact disk (CD) format, a defect up to a length of about 600 μm is corrected by the error correction function. Therefore, there was no problem even if a little dust was smaller than this.

However, in the case of an optical disk on which a recording layer containing a dye is formed, even if dust has a size of 600 μm or less, a defect may grow and reach a size of 600 μm or more depending on storage conditions thereafter. there were.

In an optical disk of a type in which a recording layer is formed by applying a dye solution, even if there is dust of 600 μm or less, this may become a defect of 600 μm or more during the manufacturing process.

For example, if dust is present before the dye is applied,
In the spin coating, the flow of the dye on the substrate is hindered, and even if the dust is 100 μm or less, there is a possibility that a problem such as trailing to a defect of 600 μm or more may occur. This defect is generally called a comet or a halley.

[0011] Dust generated in the process of the optical disk includes resin dust from the substrate. This occurs especially at the inner periphery of the substrate.

In the manufacture of an optical disk, when a substrate for an optical disk in the manufacturing process is put into the next step or stored, a so-called stack pole having a bar member planted on a base is used. A plurality of optical disks are stacked by inserting the center hole of the optical disk through the pole member of the pole.

At this time, the rod member comes into contact with the inner peripheral portion of the substrate, and dust is generated from the contact portion. Since the center hole of the substrate is formed by punching with a cut punch during injection molding, fine burrs may remain. When the rod member passes through the center hole of the substrate, the burrs fall off and become resin dust. This resin dust is one of the causes of the occurrence of the defect.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and it is an object of the present invention to suppress the generation of resin dust when an optical disk or a substrate for an optical disk is integrated, and to improve the yield of the optical disk. It is an object of the present invention to provide an optical disc integrator capable of performing the following.

[0015]

According to the present invention, there is provided a base, and a bar member erected on the base and provided to extend in a vertical direction with respect to an upper surface of the base. An optical disc integrator for integrating one or more optical discs by inserting a center hole of the optical disc through the rod member, wherein the surface roughness of the rod member is 20 or less in Rmax. . That is, the smoothness of the surface of the rod member is improved.

When the smoothness of the surface of the bar member is enhanced, even if the center hole of the optical disk (or the substrate) comes into contact with the bar member, it is possible to suppress the occurrence of burrs falling off.

When the optical disk or the substrate is integrated on the rod member, it is usually performed by a transfer arm.
When the optical disk or the substrate is transported above the rod member by the transport arm, the optical disk or the substrate separates from the transport arm, falls toward the rod member by its own weight, and further, the rod member is inserted into the center hole of the optical disk or the substrate. From the stage of insertion, the optical disk or the substrate is guided by the rod member and falls.

Normally, the burrs fall off due to the friction between the center hole of the optical disk or the substrate and the rod member. However, in the present invention, the smoothness of the surface of the rod member is improved. It is possible to suppress the occurrence of the burr coming off.

When the optical disk or the substrate is integrated on the optical disk integrator, a receiving member may be provided to prevent the optical disk or the substrate from dropping rapidly below the rod member. Since the member is gradually lowered in accordance with the accumulation of the optical disk or the substrate while receiving the optical disk or the substrate, friction occurs at this time, and the burrs fall off.

However, in the present invention, since the smoothness of the surface of the rod member is enhanced, it is possible to suppress the occurrence of such burrs falling off.

Next, the present invention comprises a base and a bar member which is erected on the base and extends vertically with respect to the upper surface of the base. An optical disc integrator for integrating one or more optical discs by inserting a center hole of the optical disc into the rod member.
The bar member is configured to have a squareness of 0.4 or less.

When an optical disk or a substrate is integrated on a rod member, it is usually performed by a transfer arm.
The optical disk or the substrate is transported above the rod member by the transfer arm, and the optical disk or the substrate is dropped when the center hole of the optical disk or the substrate and the rod member substantially coincide with each other. If the position of the tip is shifted with respect to the vertical direction, the rod member collides with the inner wall of the center hole of the optical disk or the substrate, and a large impact is applied to the inner peripheral portion of the optical disk or the substrate. This causes the burr to fall off.

In the present invention, the perpendicularity of the rod member is set to 0.4 or less, and the position of the tip of the rod member coincides with or slightly deviates from the vertical direction. Alternatively, at the stage where the substrate is transported above the bar member, the center of the optical disk or the substrate and the center axis of the bar member are easily positioned. That is, the positioning accuracy between the rod member and the transfer arm can be improved.

As a result, when the optical disk or the substrate is integrated on the rod member, a large impact is not applied to the inner peripheral portion of the optical disk or the substrate, and the generation of the burr can be suppressed.

Next, the present invention comprises a base and a bar member which is erected on the base and extends vertically with respect to the upper surface of the base. An optical disc integrator for integrating one or more optical discs by inserting a center hole of the optical disc into the rod member.
The rod member has a surface roughness Rmax of 20 or less and a perpendicularity of the rod member of 0.4 or less.

Thus, the smoothness of the surface of the rod member can be enhanced, and the positioning accuracy between the rod member and the transfer arm can be improved. As a result, the occurrence of burrs can be significantly suppressed.

In these inventions, a mounting member for increasing the perpendicularity of the bar member may be fixed to the base.

More specifically, a through hole is formed in the center of the base, a screw groove is formed in an upper inner wall of the through hole, and a screw screwed into the screw groove of the through hole is formed on an upper peripheral surface of the mounting member. By forming the peak, the mounting member may be fixed to the through hole by screwing.

In the above structure, a thread groove into which a bolt member is screwed is formed at a center of a lower portion of the rod member.
A recess into which the lower part of the rod member is inserted may be formed at the center of the upper part of the mounting member, and a through hole through which the bolt member is inserted may be formed at the lower center of the mounting member.

Further, in the present invention, a receiving member may be provided which is inserted through the rod member and is movable in the axial direction of the rod member. When an optical disk or a substrate is integrated on an integrator, the optical disk or the substrate is gradually lowered while receiving the optical disk or the substrate with the receiving member.

The receiving member may be made of a material having high smoothness. In this case, the receiving member is preferably made of a fluororesin. This is because if the receiving member does not have smoothness, dust may be generated due to friction caused by the movement.

Preferably, the size of the disk contact surface of the receiving member is set to a size corresponding to a portion of the inner peripheral portion of the optical disk that does not contribute to recording.
This is because, if the size of the disk contact surface of the receiving member is expanded to a portion contributing to recording, when the recording layer is formed by, for example, dye coating, the surface state of the substrate changes and causes uneven coating. .

Further, the receiving member may be formed in a disk shape having a flange portion on an upper portion, and an upper surface of the flange portion may be an annular tapered surface inclined downward and outward.

In the present invention, the tip of the rod member is rounded by chamfering so that the optical disk or the substrate can be easily inserted into the rod member, and furthermore, the taper surface is formed continuously. You may.

The optical disk has a heat mode type optical information recording medium having a recording layer on a substrate on which information can be recorded by irradiating a laser beam and having a light reflecting layer on the recording layer. Is also good.

In this case, if the recording layer is of a type formed by dye application, the problem of defects becomes serious in the dye application process, so that the optical disc integrator according to the present invention is used in the process before the dye application. Is preferred.

After the dye is applied, there are also a spattering step and a protective layer forming step, and even in these steps, there is a possibility that dust may cause a large defect. Therefore, it is effective to use the optical disc integrator according to the present invention in a process other than the dye application.

[0038]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment in which the optical disc integrator according to the present invention is applied to a system for manufacturing an optical disc such as a CD-R (hereinafter simply referred to as a stack pole according to the embodiment). Will be described with reference to FIGS.

The stack pole 10 according to the present embodiment
As shown in FIG. 1, a disc-shaped metal (for example, A5052 or A5056 (black)) having a flange portion 14 having an outer diameter slightly larger than the diameter of the substrate 12 (see FIG. 3) of the optical disk as shown in FIG. Anodized base 16)
A metal (for example, SUS303) pole 18 is provided at the center of the base 16 and extends vertically to the upper surface of the base 16. . A thread groove into which a bolt 20 described later is screwed is formed in the lower center of the pole 18. The diameter of a portion 18a of the lower portion of the pole 18 that is inserted into the base 16 (more precisely, a concave portion 24 of the mounting member 22 described later) is slightly smaller.

The surface of the pole 18 is lightly buff-polished, and has a maximum surface roughness Rmax with an upper limit of 20 or less, preferably 12 or less, more preferably 8 or less, and a lower limit of 0.1 or less. It is at least 01, preferably at least 0.05, more preferably at least 0.1. In order to improve the smoothness, it is sufficient if the lower limit of Rmax is 0.01 or more in consideration of the sliding effect and the processing cost of the optical disc.

In this embodiment, the surface roughness of the pole 18 is 6.3 in the maximum height Rmax, 6.3 in the ten-point average roughness Rz, and 1.6 in the center line surface roughness Ra. I have.

The attachment of the pole 18 to the base 16 is performed, for example, as follows. That is, a through hole 28 having a step 26 is formed at the center of the base 16, and the diameter of the upper portion of the through hole 28 is formed smaller than the diameter of the lower portion. A thread groove 30 is formed.

The through hole 28 having the step 26
A metal (for example, SUS303) mounting member 22 for increasing the perpendicularity of the pole 18 is fixed to the pole 18 by, for example, screwing. At the upper part of the mounting member 22, a thread which is screwed into the screw groove 30 of the through hole 28 is formed on the peripheral surface, and the outer diameter of the lower part of the mounting member 22 is
The inner diameter of the lower portion of the through hole 28 of the sixth embodiment is substantially the same as that of the lower portion.

In the center of the upper part of the mounting member 22, there is formed the recess 24 having a diameter substantially equal to the outer diameter of the lower part of the pole 18 and into which the lower part of the pole 18 is inserted. In the center of the lower portion of the mounting member 22, a concave portion 32 having a lower surface opening
A through hole 34 through which the bolt 20 is inserted is formed from the bottom of the recess 32 to the upper recess 24.

Therefore, when assembling the stack pole 10, first, the mounting member 22 is screwed and fixed to the central portion of the base 16 from below, and then the lower portion of the pole 18 is fitted to the concave portion 24 of the upper portion of the mounting member 22. The bolt 20 is inserted from the concave portion 32 at the lower portion of the
The stack pole 10 according to the present embodiment is configured by screwing the stack pole toward the stack pole 10.

The perpendicularity of the stack pole 10 has an upper limit of 0.4 or less, preferably 0.35 or less, more preferably 0.3 or less, and a lower limit of 0.01 or more, preferably 0.05 or more. More preferably, it is 0.1 or more. Since the positioning accuracy that is too high has no effect as compared with the increase in the processing cost, the above range is appropriate.

Further, the stack pole 10 is provided with, for example, a resin top member 40 which is inserted through the pole 18 and is movable in the axial direction of the pole 18.
The top member 40 is formed in a disk shape having a flange portion 42 at the upper part, a through hole 44 having a diameter slightly larger than the diameter of the pole 18 is formed at the center, and the substrate 12 is formed at the upper center. An annular projection 46 (FIG. 2)
(See FIG. 2) is formed. The upper surface of the flange portion 42 is an annular tapered surface 50 inclined downwardly outward and has an inclination angle θ of about 17 ° (FIG. 2).
reference). In FIG. 2, an annular groove 52 formed on the surface of the substrate 12 opposite to the surface on which the annular protrusion 46 is formed is for improving the dimensional accuracy of the substrate 12.

The top member 40 is made of a material having a high smoothness,
For example, it is made of a fluorine-based resin. This is because if the top member 40 has no smoothness, dust may be generated due to friction caused by the movement.

As shown in FIG. 1, the tip (upper end) 60 of the pole 18 is chamfered and rounded so that the substrate 12 can be easily inserted, and a tapered surface 62 is formed continuously.

Here, the outer diameter is 12 mm and the inner diameter is 1.5 m
stack pole 1 when applied to a substrate 12
An example of a preferable dimensional relationship of 0 will be described. The formation range d1 of the tapered surface 62 at the tip of the pole 18 is described.
Is preferably in the range of 20 mm or less from the tip 60, and the inclination angle ψ of the tapered surface 62 is 5 ° or more and 45 ° or less,
Preferably it is 10 ° or more and 35 ° or less.

The diameter d2 of the pole 18 is preferably smaller in the range of 0.3 mm or more and 2 mm or less with respect to the inner diameter of the substrate 12, and 0.5 mm or more with respect to the inner diameter of the substrate 12.
Most preferably, it is small within a range of 1 mm or less.

The height h of the pole 18, that is, the height h from the upper surface of the base 12 to the tip 60 of the pole 18 is 100 m.
m or more and 600 mm or less, preferably 200 mm
Above, it is 450 mm or less.

When the substrate 12 is to be loaded on the stack pole 10, as shown in FIG. 3, a transport mechanism 70 for holding and transporting the substrate 12 and a frame member inserted into the stack pole 10 This is performed by using a feed screw mechanism 72 that moves the vertical direction 40.

The transport mechanism 70 has a suction pad 74 for sucking and holding the substrate 12 by vacuum suctioning the upper surface of the substrate 12, and an arm mechanism 76 for moving the suction pad 74 in the vertical and horizontal directions. Have been.

The feed screw mechanism 72 includes a feed screw 78 extending in the vertical direction, a motor (not shown) for driving the feed screw 78 to rotate, and a top member 40 inserted through the pole 18.
And an arm 80 that moves up and down along the axis of the feed screw 78 when the feed screw 78 rotates.

When no substrate 12 is stacked on the stack pole 10, the feed screw mechanism 72 moves the top member 40 to a position slightly lower than the tip of the pole 18, for example, the upper surface of the top member 40. The arm 80 is positioned so as to be located, for example, below the lower boundary portion b (see FIG. 1) in the formation range of the tapered surface 62 by the thickness of the substrate 12.
Is moved for positioning.

Thereafter, the first substrate 1 after the inspection process is completed.
2 is transported above the stack pole 10 by the transport mechanism 70, and after the center hole of the substrate 12 and the pole 18 of the stack pole 10 are positioned to face each other, the vacuum suction of the transport mechanism 70 is stopped. As a result, the substrate 12 falls downward while passing through the pole 18 of the stack pole 10, and is placed on the upper surface of the top member 40.

At this time, since the top member 40 is located at the upper end portion of the pole 18, the falling distance of the substrate 12 is very short, and no deformation is caused by the falling.
Further, since the tip 60 of the pole 18 is rounded and the tapered surface 62 is formed continuously, the tip of the pole 18 enters the center hole of the substrate 12 smoothly, and the substrate 12 There is no collision with the tip.

Thereafter, the feed screw 78 of the feed screw mechanism 72 is rotated by a predetermined number of rotations by a motor (not shown), whereby the top member 40 is moved downward by the thickness of the substrate 12.

Next, the second substrate 12 after the inspection process is completed.
In the same manner as described above, is transported to the stack pole 10 side by the transport mechanism 70, falls down while inserting the pole 18, and is loaded on the first substrate 12 as shown in FIG. At this time, due to the presence of the annular projection 46 formed on one surface of the substrate 12, a slight gap d
3 is formed, whereby adhesion between the substrates 12 is prevented, and the problem that the dye recording layer formed on the upper surface of the lower substrate 12 adheres to the lower surface of the upper substrate 12 is eliminated. Can be avoided.

Moreover, the gap d3 formed between the substrates 12
Is very narrow, so that even when the stack pole 10 on which the substrates 12 are integrated is taken out of the production line and exposed to the outside, there is an advantage that dust and dust hardly enter between the substrates 12.

A method of manufacturing an optical disc integrated on the stack pole 10 according to the present embodiment will be described with reference to FIGS. 4A to 5B.

First, a resin material such as polycarbonate is injection-molded, compression-molded or injection-compression-molded, and as shown in FIG. 4A, a groove 100 for representing information such as a tracking groove or an address signal is formed on one main surface. The substrate 12 on which is formed is manufactured.

Examples of the material of the substrate 12 include acrylic resins such as polycarbonate and polymetal methacrylate, vinyl chloride resins such as polyvinyl chloride and vinyl chloride copolymer, epoxy resins, amorphous polyolefin and polyester. They can be used together if desired. Among the above materials, polycarbonate is preferred from the viewpoints of moisture resistance, dimensional stability, cost, and the like. The depth of the groove 100 is 0.01
It is preferable that it is in the range of 0.3 to 0.3 μm, and its half width is in the range of 0.2 to 0.9 μm.

After the manufactured substrate 12 is cooled, it is stacked on the stack pole 10 with one main surface directed downward. When a predetermined number of substrates 12 are stacked on the stack pole 10, the stack pole 10 is transported to the next coating line. This transfer may be performed by a trolley or by a self-propelled automatic transfer device.

At the stage when the stack pole 10 is put into the coating process, the transfer mechanism 70 (FIG.
Operates) to take out the substrates 12 one by one from the stack poles 10 and transport them to the dye application step. The substrate 12 conveyed to the dye coating step is coated with a dye coating liquid on one main surface, and then rotated at high speed to make the thickness of the coating liquid uniform, and then subjected to a drying process. by this,
As shown in FIG. 4B, the dye recording layer 102 is formed on one main surface of the substrate 12.

As the coating solution, a dye solution in which a dye is dissolved in an appropriate solvent is used. The concentration of the dye in the coating solution is generally in the range of 0.01 to 15% by weight, preferably in the range of 0.1 to 10% by weight, particularly preferably 0.5 to 10% by weight.
It is in the range of 5% by weight, most preferably in the range of 0.5-3% by weight. The thickness of the coating film (dye recording layer) 102 is generally in the range of 20 to 500 nm, preferably 50 to 300 n.
m.

The dye used in the dye recording layer 102 is not particularly limited. Examples of usable dyes include cyanine dyes, phthalocyanine dyes, imidazoquinoxaline dyes, pyrylium / thiopyrylium dyes, azurenium dyes, squalilium dyes, metal complex salt dyes such as Ni and Cr, and naphthoquinone dyes And anthraquinone dyes, indophenol dyes, indoaniline dyes, triphenylmethane dyes, merocyanine dyes, oxonol dyes, aminium / diimmonium dyes, and nitroso compounds. Among these dyes, cyanine dyes, phthalocyanine dyes, azulenium dyes, squalilium dyes,
Oxonol dyes and imidazoquinoxaline dyes are preferred.

Examples of solvents for the coating solution for forming the dye recording layer 102 include esters such as butyl acetate and cellosolve acetate; ketones such as methyl ethyl ketone, cyclohexanone and methyl isobutyl ketone; dichloromethane, 1,2-dichloroethane, and chloroform. Chlorinated hydrocarbons such as amides; amides such as dimethylformamide;
Hydrocarbons such as cyclohexane; tetrahydrofuran,
Ethers such as ethyl ether and dioxane; alcohols such as ethanol, n-propanol, isopropanol, n-butanol and diacetone alcohol;
Fluorinated solvents such as 2,3,3-tetrafluoro-1-propanol; ethylene glycol monomethyl ether;
Examples thereof include glycol ethers such as ethylene glycol monoethyl ether and propylene glycol monomethyl ether.

The above-mentioned solvents can be used alone or in combination of two or more in consideration of the solubility of the dye used. Preferably, it is a fluorinated solvent such as 2,2,3,3-tetrafluoro-1-propanol. In the coating solution, an anti-fading agent or a binder may be added as desired, or various additives such as an antioxidant, a UV absorber, a plasticizer, and a lubricant may be added according to the purpose. It may be added.

Representative examples of the anti-fading agent include nitroso compounds, metal complexes, diimmonium salts, and aminium salts. These examples are described in, for example, JP-A-2-300288, JP-A-3-224793, and JP-A-4-224793.
No. 146189.

Examples of the binder include natural organic high molecular substances such as gelatin, cellulose derivatives, dextran, rosin, and rubber; and hydrocarbon resins such as polyethylene, polypropylene, polystyrene, and polyisobutylene; polyvinyl chloride; Vinylidene, polyvinyl chloride
Vinyl resins such as polyvinyl acetate copolymer, acrylic resins such as polymethyl acrylate and polymethyl methacrylate, polyvinyl alcohol, chlorinated polyethylene, epoxy resin, butyral resin, rubber derivatives, phenol
Synthetic organic polymers such as precondensates of thermosetting resins such as formaldehyde resins can be mentioned.

When a binder is used, the amount of the binder used is generally 20 parts by weight or less, preferably 10 parts by weight or less, more preferably 5 parts by weight, based on 100 parts by weight of the dye.
Not more than parts by weight.

An undercoat layer is provided on the surface of the substrate 12 on the side where the dye recording layer 102 is provided, for the purpose of improving the flatness, improving the adhesive strength, and preventing the deterioration of the dye recording layer 102. Is also good.

Examples of the material for the undercoat layer include polymethyl methacrylate, acrylic acid / methacrylic acid copolymer,
Styrene / maleic anhydride copolymer, polyvinyl alcohol, N-methylol acrylamide, styrene / vinyl toluene copolymer, chlorosulfonated polyethylene,
Nitrocellulose, polyvinyl chloride, chlorinated polyolefin, polyester, polyimide, vinyl acetate-vinyl chloride copolymer, ethylene-vinyl acetate copolymer, polyethylene, polypropylene, polycarbonate and other high-molecular substances, and silane coupling agents Surface modifiers can be mentioned.

The undercoat layer is prepared by dissolving or dispersing the above substance in an appropriate solvent to prepare a coating solution, and then applying this coating solution to the substrate 12 using a coating method such as spin coating, dip coating, or extrusion coating. It can be formed by coating on the surface of the substrate. The thickness of the undercoat layer is generally 0.1.
005 to 20 μm, preferably 0.01 to 10 μm
m.

The substrate 12 on which the dye recording layer 102 has been formed
After cleaning the opposite side (back side) of the one main surface,
An inscription such as a lot number is made on one main surface or the back surface of the substrate 12.

After that, the substrate 12 is inspected for the presence or absence of a defect and the thickness of the dye recording layer 102. This inspection is performed by irradiating light from the back surface of the substrate 12 and performing image processing on the transmission state of the light using, for example, a CCD camera.

The substrate 12 that has been subjected to the above-described inspection processing is mounted on the stack pole 10 for a normal product based on the inspection result.
Alternatively, the transport mechanism 70 is attached to the stack pole 10 for NG.
It is accumulated by.

When a predetermined number of substrates 12 are stacked on the stack poles 10 for normal products, the stack poles 10 for normal products are taken out of the application line and conveyed to the next post-processing line. This transfer may be performed by a trolley or by a self-propelled automatic transfer device.

At the stage when the stack pole 10 for a normal product is put into the post-processing line, the transport mechanism 70 installed on the post-processing line operates, and
The substrates 12 are taken out one by one and transported to the sputtering process. As shown in FIG. 4C, the substrate 12 put into the sputtering step has a peripheral portion (edge portion) 10 in one main surface thereof.
The light reflection layer 106 is formed on the entire surface except for the surface 4 by sputtering.

The light-reflective substance, which is the material of the light-reflective layer 106, is a substance having a high reflectance with respect to laser light, and examples thereof include Mg, Se, Y, Ti, Zr, Hf, V, and N.
b, Ta, Cr, Mo, W, Mn, Re, Fe, Co,
Ni, Ru, Rh, Pd, Ir, Pt, Cu, Ag, A
u, Zn, Cd, Al, Ga, In, Si, Ge, T
e, Pb, Po, Sn, Bi, and other metals and semi-metals or stainless steel.

Of these, preferred are Cr, N
i, Pt, Cu, Ag, Au, Al and stainless steel. These substances may be used alone or in combination of two or more. Alternatively, it may be used as an alloy. Particularly preferred is Ag or an alloy thereof.

The light reflecting layer 106 can be formed on the dye recording layer 102 by, for example, vapor deposition, sputtering or ion plating of the light reflecting substance. The thickness of the reflective layer is generally 10 to 800 n.
m, preferably in the range of 20 to 500 nm, more preferably in the range of 50 to 300 nm.

The substrate 12 on which the light reflecting layer 106 is formed is
As shown in FIG. 5A, the edge portion 104 in one main surface of the substrate 12 is cleaned, and the dye recording layer 102 formed on the edge portion 104 is removed. Then, the substrate 12
Is transported to a UV curing liquid application step, and the UV curing liquid is dropped on a part of one main surface of the substrate 12. Then, by rotating at high speed, the coating thickness of the UV curing liquid dropped on the substrate 12 is made uniform over the entire surface of the substrate 12.

Thereafter, the UV curing liquid on the substrate 12 is irradiated with ultraviolet rays. Thereby, as shown in FIG. 5B, the dye recording layer 102 formed on one main surface of the substrate 12 is formed.
Then, a protective layer 108 made of a UV curable resin is formed so as to cover the light reflecting layer 106 and the optical disk D.

The protective layer 108 covers the dye recording layer 102 and the like.
On the light reflection layer 106 for physical and chemical protection
Is provided. The protective layer 108 is a dye recording layer of the substrate 12
Increases scratch and moisture resistance on the side where 102 is not provided
It can also be provided for the purpose. Used in the protective layer 108
As the material, for example, SiO, SiO_Two, Mg
F _Two, SnO_Two, Si_ThreeN_FourAnd other inorganic substances, and thermoplastics
Organic such as thermosetting resin, thermosetting resin, and UV curable resin
Substances can be mentioned.

The protective layer 108 can be formed, for example, by laminating a film obtained by extrusion of plastic onto the light reflecting layer 106 and / or the substrate 12 via an adhesive. Alternatively, it may be provided by a method such as vacuum deposition, sputtering, or coating. In the case of a thermoplastic resin or a thermosetting resin, they can also be formed by dissolving these in an appropriate solvent to prepare a coating solution, applying the coating solution, and drying.

In the case of a UV-curable resin, as described above, a coating solution is prepared as it is or dissolved in an appropriate solvent, and then the coating solution is applied and irradiated with UV light to be cured. can do. Various additives such as an antistatic agent, an antioxidant, and a UV absorber may be added to these coating solutions according to the purpose. The thickness of the protective layer 108 is generally provided in the range of 0.1 to 100 μm.

Thereafter, the optical disk D is loaded with the dye recording layer 10
The presence / absence of a defect on the surface 2 and the surface of the protective layer 108 and the signal characteristics of the groove 100 formed on the substrate 12 of the optical disk D are inspected. These inspections are performed by irradiating light to both sides of the optical disc D and subjecting the reflected light to image processing by, for example, a CCD camera.

The optical disk D that has been subjected to the above-described defect inspection process and characteristic inspection process is transported and sorted to a stack pole 10 for normal products or a stack pole 10 for NG based on each inspection result.

When a predetermined number of optical discs D are loaded on the stack pole 10 for normal products, the stack pole 10 is taken out of the post-processing line and put into a label printing step (not shown).

Thus, in the stack pole 10 according to the present embodiment, the surface roughness of the pole 18 is set to 20 or less at the maximum height Rmax.
That is, the smoothness of the surface of the pole 18 is enhanced. Therefore, even if the optical disk D (or the substrate 1
Even if the center hole of 2) and the pole 18 come into contact with each other, it is possible to prevent the burr from falling off.

When the optical disk D or the substrate 12 is integrated on the pole 18, the transfer is performed by the transport mechanism 70. In this case, the optical disk D or the substrate 12 is transported by the transport mechanism 70.
Is transported above the pole 18, the optical disk D or the substrate 12 separates from the transport mechanism 70, falls toward the pole 18 by its own weight, and is further inserted into the center hole of the optical disk D or the substrate 12. From this stage, the optical disc D or the substrate 12 is guided by the pole 18 and falls.

Normally, the burrs fall off due to the friction between the center hole of the optical disc D or the substrate 12 and the pole 18, but in the present embodiment, the smoothness of the surface of the pole 18 is enhanced. Therefore, the occurrence of such burrs can be suppressed.

Further, in the present embodiment, when the optical disc D or the substrate 12 is integrated on the stack pole 10, the top member 40 is installed so that the optical disc D or the substrate 12 does not drop rapidly below the pole 18. Like that. Also in this case, while the optical disc D or the substrate 12 is received by the top member 40, the optical disc D or the substrate 12 is gradually lowered in accordance with the accumulation thereof. Become.

However, in the present embodiment, since the smoothness of the surface of the pole 18 is enhanced, it is possible to suppress the occurrence of such burrs falling off.

When the optical disk D or the substrate 12 is integrated on the pole 18, if the position of the pole 18, particularly the position of the tip 60, is shifted from the vertical direction, the center hole of the optical disk D or the substrate 12 is The pole 18 collides with the inner wall, and as a result, a large impact is applied to the inner peripheral portion of the optical disc D or the substrate 12. This causes the burr to fall off.

In the present embodiment, the perpendicularity of the pole 18 is set to 0.4 or less, and the position of the tip 60 of the pole 18 coincides with or slightly deviates from the vertical direction. When the optical disk D or the substrate 12 is transported above the pole 18 by the mechanism 70, the center of the optical disk D or the substrate 12 and the center axis of the pole 18 are easily positioned. That is, the positioning accuracy between the pole 18 and the transport mechanism 70 can be improved.

As a result, when the optical disk D or the substrate 12 is integrated on the pole 18, a large impact is not applied to the inner peripheral portion of the optical disk D or the substrate 12, and
Burrs can be prevented from falling off.

In the present embodiment, the size of the contact surface (flat surface 48) of the disk D in the top member 40 is
The inner peripheral portion of the substrate 12 has a size corresponding to a portion that does not contribute to recording. That is, the diameter is set smaller than the inner diameter of the dye recording layer 102. This is because if the size of the flat surface 48 of the top member 40 is expanded to a portion contributing to printing, the surface state of the substrate 12 changes, which causes uneven coating.

If the type of the optical disk D integrated on the stack pole 10 is a type in which the dye recording layer 102 is formed by dye coating, the problem of defects in the dye coating process becomes serious. As shown in the embodiment, it is preferable to use the stack pole 10 in a process before applying the dye.

Even after the application of the dye, there are a sputtering step and a protective layer forming step, and even in these steps, there is a possibility that dust may cause a large defect. Therefore, there is an effect even if the stack pole 10 according to the present embodiment is used in a process other than the dye application.

[0104]

EXAMPLES Here, one experimental example will be described. In this experimental example, Examples 1 to 3 and Comparative Examples 1 to 3 were manufactured in the process of manufacturing a sample in which the dye recording layer 102 was formed on the substrate 12.
The yield of a sample is obtained by using the stack pole 10 according to (1) after the substrate 12 is formed and before the dye is applied.

The yield was 100 μm after dye application.
The determination was made based on the presence or absence of defects of m or more. The number of processes is 300 for each.

In Examples 1 to 3, the finishing accuracy was set higher in Example 1 only (maximum height R).
max = 0.7), and about Examples 2 and 3 were set substantially the same (maximum height Rmax = 6). Regarding the squareness, only Example 2 was set higher (squareness = 0.2),
Examples 1 and 3 were set substantially the same (squareness = 0.3).

In Comparative Examples 1 to 3, the finishing accuracy was set lower in Comparative Example 3 only (maximum height Rmax).
= 95), and about the same as Comparative Examples 1 and 2 (maximum height Rmax = 25, 23). Regarding the squareness, only Comparative Example 2 was set lower (square angle = 1), and Comparative Examples 1 and 3 were set substantially the same (squareness =
0.5, 0.3).

The method for forming the sample is as follows. First, a substrate 12 having a spiral groove 100 having a thickness of 1.2 mm and a diameter of 120 mm (a depth of 160 nm, a width of 0.4 μm, and a track pitch of 1.6 nm) is prepared.

To a cyanine dye having a benzoindolenine skeleton represented by the following general formula (1), an anti-fading agent represented by the following general formula (2) is added in an amount of 10% based on the dye.
And adding them to the compound represented by the following general formula (3).
It was mixed with 2,3,3-tetrafluoro-1-propanol and dissolved by applying ultrasonic waves for 2 hours to prepare a dye coating solution for forming the dye recording layer 102.

[0110]

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[0111]

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[0112]

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The dye coating solution was applied on the surface of the groove 12 of the substrate 12 by spin coating while changing the rotation speed from 300 rpm to 4000 rpm.

FIG. 6 shows the results of this experiment. From these experimental results, in Examples 1 to 3, the results were obtained with a yield of 90% or more, and it was found that the generation of burrs and the generation of dust, which cause defects, were effectively suppressed. .

The optical disc integrator according to the present invention is not limited to the above-described embodiment, but may adopt various configurations without departing from the gist of the present invention.

[0116]

As described above, according to the optical disc integrator according to the present invention, when integrating an optical disc or a substrate for an optical disc, the generation of resin dust can be suppressed, and the yield of the optical disc can be reduced. Can be improved.

[Brief description of the drawings]

FIG. 1 is a side view showing a partially broken stack pole according to the present embodiment.

FIG. 2 is an enlarged view showing a state in which a substrate is placed on a top member of a stack pole according to the present embodiment.

FIG. 3 is a configuration diagram showing a transport mechanism and a feed screw mechanism for stacking substrates on a stack pole according to the present embodiment.

4A is a process diagram showing a state in which a groove is formed on a substrate, FIG. 4B is a process diagram showing a state in which a dye recording layer is formed on the substrate, and FIG. 4C is a light reflecting layer on the substrate. FIG. 4 is a process diagram showing a state in which is formed.

FIG. 5A is a process diagram showing a state where an edge portion of the substrate is cleaned, and FIG. 5B is a process diagram showing a state where a protective layer is formed on the substrate.

FIG. 6 is a table showing the results of an experimental example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Stack pole 12 ... Substrate 16 ... Base 18 ... Pole 22 ... Mounting member 40 ... Top member 48 ... Flat surface 50 ... Taper surface 70 ... Transport mechanism

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Katsumi Sugiyama 2-10-8 Shinmeidai, Hamura-shi, Tokyo F-term in Fuji Magnedisk Corporation (reference) 5D121 AA02 GG30 JJ02 JJ09

Claims (7)

[Claims] The bar member comprises: a base; and a bar member which is erected on the base and extends in a direction perpendicular to an upper surface of the base. An optical disc integrator for accumulating one or more optical discs by inserting a center hole of the optical disc into the optical disc, wherein the rod member has a surface roughness Rmax of 20 or less. 2. The bar member, comprising: a base; and a bar member which is erected on the base and is provided to extend in a vertical direction with respect to an upper surface of the base. An optical disc integrator for integrating one or more optical discs by inserting a center hole of the optical disc into the optical disc, wherein a perpendicularity of the rod member is 0.4 or less. 3. The bar member, comprising: a base; and a bar member erected on the base and extending in a direction perpendicular to an upper surface of the base. An optical disc accumulator for accumulating one or more optical discs by inserting a center hole of the optical disc into the optical disc, wherein the surface roughness of the rod member is 20 or less in Rmax, and the squareness of the rod member is An optical disc integrator characterized by being 0.4 or less. 4. The optical disc integrator according to claim 1, further comprising a receiving member that is inserted through said rod member and is movable in the axial direction of said rod member. Optical disc integrator. 5. The optical disc integrator according to claim 4, wherein the size of the disc contact surface of the receiving member is a size corresponding to a portion of the inner peripheral portion of the optical disc that does not contribute to recording. An optical disc integrator characterized by the above-mentioned. 6. The optical disc integrator according to claim 4, wherein the receiving member is formed in a disk shape having a flange portion on an upper portion, and an upper surface of the flange portion is inclined downward and outward. An optical disc integrator characterized by an annular tapered surface. 7. The optical disc integrator according to claim 1, wherein the optical disc has a recording layer on a substrate, on which information can be recorded by irradiating a laser beam, An optical disc integrator, which is a heat mode optical information recording medium having a light reflection layer on the recording layer.