JPS634439A - Copying equipment for information recording medium - Google Patents

Abstract

PURPOSE:To copy high quality information recording media with high productivity by providing a large diameter part and a small diameter part to a shaft member entering a substrate opposite to a stamper, and providing a projecting part to part of the large diameter part. CONSTITUTION:In order to center the substrate 34 with respect to the stamper 33, the shaft member 22 inserted through the stamper 33 and the substrate 34, is provided and the shaft member 22 has the large diameter part 26 having a relatively larger diameter and the small diameter part 25 connected to the large diameter part 26 and having a relatively smaller diameter. Further, a projection 27 projected in a direction orthogonal to the shaft center of the shaft member 22 is formed in the vicinity of the boundary between the large diameter part 26 and the small diameter part 25, the small diameter part 25 is inserted through the stamper 23 and the large diameter part 26 are penetrated through the substrate 24 to apply alignment. While an end face 26a at the boundary of the large diameter part 26 with the small diameter 25 is contacted closed to the stamper 33, the end face 26a is opposed to the base and the projection 26 pushes the substrate 34 bonded because of the cured resin 12 to exfoliate the base 34 from the stamper 33.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention makes it possible to reproduce information recording media by bringing a stamper and a substrate into contact with each other via a liquid resin, and by curing the resin and adhering it to the substrate. This relates to a device for

[Summary of the invention]

The present invention provides an information recording medium duplication apparatus as described above, in which a shaft member for centering a substrate with respect to a stamper is provided with a large diameter part and a small diameter part, and further a protruding part is provided in a part of the large diameter part. This makes it possible to copy high-quality information recording media with high productivity.

[Conventional technology]

There are two methods for duplicating an information recording medium using a stamper.
There are various methods such as P method (photopolymerization method), combination mold method, and injection mold method.

However, among these methods, methods such as the 2P method in which liquid resin is cured have significantly improved signal transferability because even if the stamper pattern is minute, the resin is liquid and the pattern is sufficiently filled with the resin. Excellent.

FIG. 2 shows the principle of the 2P method as described above. In this 2P method, as shown in FIG. 2A, an ultraviolet curable resin 12 is first placed on a standber 11, and then a flat transparent substrate 13 is brought close to the stamper 11, and then the stamper 11 is attached as shown in FIG. 2B. An ultraviolet curing resin 12 is filled between the transparent substrate 13 and the transparent substrate 13 .

Then, in this state, the ultraviolet curable resin 12 is cured by irradiating ultraviolet rays from the side of the transparent substrate 13, and then the transparent substrate 13 to which the ultraviolet curable resin 12 is bonded is transferred to the second C.
It is peeled off from the stamper 11 as shown in the figure. In this way, the information recording medium 14 onto which the signal has been transferred is duplicated.

By the way, the shape of the transparent substrate 13 used in the 2P method is as follows:
There are two main types: One of them is a substrate that is pre-processed into the shape of the final product.For example, for compact discs, the outer diameter is 120 mm and the center hole diameter is 1.
It is a disk of five dragons. The other type is a substrate that requires post-processing after signal transfer.

[Problem that the invention seeks to solve]

However, when using the latter substrate, cutting and the like are required as post-processing, resulting in low productivity. Furthermore, the prepared products may be damaged due to the adhesion of cutting chips, etc., and the quality of these replicated products is not necessarily high.

On the other hand, when using the former type of substrate, no post-processing is performed, so it is necessary to center the substrate with respect to the stamper. However, in conventional duplicating machines, this centering is not easy (and causes eccentricity in the duplicated products).For this reason, in conventional duplicating machines, it is difficult to perform this centering easily (this causes eccentricity in the duplicated products). could not be used.

In addition, no matter which of the above-mentioned substrates is used, in the conventional apparatus, the base Fi 13 is peeled off by warping the peripheral portion of the substrate 13 as shown in FIG. 2C. Therefore, this peeling is not easy, and there is a limit to productivity improvement.

[Means for solving problems]

In the information recording medium duplication apparatus according to the present invention, the stamper 3
It has a shaft member 22 inserted through these stampers 33 and the substrate 34 in order to center the substrate 34 with respect to the stamper 33,
This shaft member 22 has a relatively large diameter portion 26 and a relatively small diameter portion 25 connected to the large diameter portion 26, and the small diameter portion 25 of the large diameter portion 26 A protrusion 27 is formed near the boundary between the shaft member 22 and the shaft member 22 to allow the small diameter part 25 to be inserted into the stamper 33 and the large diameter part 26 to be inserted into the substrate. 34, the centering is performed, and the end face 26a of the large diameter part 26 at the boundary with the small diameter part 25 is brought into close contact with the stamper 33, and the resin 12 is cured. The substrate 34 bonded by
is pushed up by the protrusion 27 to separate the substrate 34 from the stamper 33.

[Effect]

In the information recording medium duplication apparatus according to the present invention, the shaft member 22
Since the substrate Fi 34 is centered with respect to the stamper 33 by the steps shown in FIG.

Further, since the substrate 34 is pushed up by the protrusion 27 of the shaft member 22 after the resin 12 is cured, the substrate 34 can be easily peeled off from the stamper 33.

Moreover, the stamper 33 and the base +ff 134 are connected to the liquid resin 1 with the end face 26a of the large diameter part 26 of the shaft member 22 at the boundary with the small diameter part 25 brought into close contact with the stamper 33.
2, the resin 12 is prevented from adhering to at least the small diameter portion 25 of the shaft member 22. For this reason, the substrate 34 is smoothly peeled off by pushing up the protrusion 27 of the shaft member 22, and there is no adverse effect on the new substrate 34 during duplication.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

The duplicating apparatus of this embodiment has a flat electromagnet 21 as a stamper fixing plate, and a center hole 21a is formed in the center of the flat electromagnet 21. A shaft member 22 is slidably inserted into the center hole 21a, and this shaft member 22 is connected to a cylinder 24 via a connector 23.

The shaft member 22 has a small diameter portion 25 having a diameter substantially equal to the center hole diameter of a stamper, which will be described later, and a large diameter portion 26, which has a diameter substantially equal to the center hole diameter of a transparent substrate, which will be described later.
Furthermore, an umbrella-shaped protrusion 27 is formed in the large diameter portion 26 near the boundary with the small diameter portion 25 .

The small diameter portion 25 of the shaft member 22 has a hollow passage 3 at its axial center.
1 is formed. One end of the hollow passage 31 is an opening 31a that is open in the radial direction of the small diameter portion 25 near the protrusion 27, and the other end is an opening 31b that is open into the connection 2S23. And this coupler 2
3 is connected to a chip 32.

To perform duplication using the duplication apparatus of this embodiment,
Made of Ni and formed by press punching or cutting, the diameter is 1.
A stamper 33 having a center hole 33a with a diameter of 15 mm and a center hole 3 made of glass or plastic and having a diameter of 15 mm.
4a and a disk-shaped transparent substrate 34.

The edges of the center hole 34a and the outer circumferential portion 34b of the transparent substrate 34 have been subjected to large chamfering in advance.

The center hole 33a of the stamper 33 and the flat tiff stone 2
The small diameter portion 25 of the shaft member 22 is inserted into the center hole 21a of the shaft member 22, and the entire surface of the stamper 33 is attracted by the flat plate electromagnet 21, and the end face 26a of the large diameter portion 26 at the boundary with the small diameter portion 25 is attached to the stamper 33. 33 near the center hole 33a.

In this state, the ultraviolet curing resin 12 is placed on a predetermined part of the stamper 33.
, and then insert the center hole 34a of the transparent substrate 34 into the shaft member 22.
The transparent substrate 34 is fitted onto the large diameter portion 26 of the stamper 33.
By approaching the stamper 33 and the transparent substrate 34, the ultraviolet curing resin 12 is filled between the stamper 33 and the transparent substrate 34 as shown in FIG.

As described above, the edge of the center hole 34a of the transparent substrate 34 has been subjected to a large chamfering process in advance, so even if the transparent substrate 34 approaches the stamper 33, the transparent substrate 34 will not protrude from the shaft member 23. It does not come into contact with the portion 27. Then, in this state, the ultraviolet curing resin 12 is cured by irradiating ultraviolet rays from the transparent substrate 34 side.

When this curing is completed, the cylinder 24 moves the shaft member 22 in the six directions of the arrows, and at the same time, high-pressure air is blown out from the opening 31a via the tube 32, the connector 23, and the hollow passage 31. Then, the ultraviolet curing resin 12 is cured and the adhered transparent substrate 34 is peeled off from the stamper 33 due to the push-up by the protrusion 27 of the shaft member 22 and the high-pressure air.

In the duplicating apparatus of this embodiment as described above, the transparent base (paper 34) is peeled off from the stamper 33 by the push-up by the protrusion 27 and high-pressure air, so that this peeling is easily performed.

Further, since the stamper 33 is attracted by the flat electromagnet 21 and is pressed by the end face 26a of the large diameter portion 26 of the shaft member 22, even if the stamper 33 is subjected to stress, the stamper 33 can be placed on a smooth flat surface. It is kept in the same condition. Therefore, the signal from the stamper 33 is transferred to the duplicated product in a positive direction, making it difficult for skew to occur.

At this time, since the flat electromagnet 21 is not a permanent magnet but an electromagnet, the stamper 33 can be easily attached and detached. Note that in order to prevent the surface of the transparent substrate 34 from being scratched, the surface of the flat electromagnet 21 may be coated or covered with a thin sheet.

Furthermore, since the edges of the center hole 34a and the outer circumferential portion 34b of the transparent substrate 34 are largely chamfered in advance, as is clear from FIG. UV curing resin 1
2 is suppressed from protruding.

If the ultraviolet curing resin 12 protrudes from the transparent substrate 34, this protruding portion is likely to remain on the stamper 33 when the transparent substrate 34 is peeled off. If the protruding portion remains on the stamper 33, the portion that should be bonded to the transparent substrate 34 may also remain on the stamper 33. If the ultraviolet curing resin 12 remains on the stamper 33 in this way, the number of media that can be copied from one stamper will be small, and the life of the stamper 33 will be shortened. On the other hand, if the protruding portion is adhered to the transparent substrate 34, the protruding portion may become flaky and require post-processing.

〔Effect of the invention〕

The information recording medium duplicating apparatus according to the present invention can use a substrate that has been pre-processed into the shape of up to 88 products, and can easily peel the substrate from the stamper, and can perform this peeling smoothly. Therefore, information recording media can be copied with high productivity.

In addition, it is possible to use a substrate that has been pre-processed into the shape of the final product, and the resin used in previous duplication will not have an adverse effect on the newly used substrate, making it possible to create high-quality information storage media. can be duplicated.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing one embodiment of the present invention, and FIG.
FIG. 3 is a side sectional view showing the principle of replication using the P method in the order of steps. In addition, in the symbols used in the drawings, 12-...--11-- Ultraviolet curing resin 22-------- Uniaxial member 25-- −・−・・・−Small diameter portion 26−−
-------------・--Large diameter portion 26 a----・-・
... - End surface 27 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Protrusion portion 33
------・---- Stamper 34--------- It is a transparent substrate.

Claims (1)

[Scope of Claims] In an apparatus for duplicating an information recording medium by bringing a stamper and a substrate into contact with each other via a liquid resin, and curing the resin and adhering it to the substrate, the center of the substrate relative to the stamper is provided. It has a shaft member that is inserted through these stampers and the substrate in order to perform printing, and this shaft member has a relatively large diameter part and a relatively small diameter part connected to the large diameter part. A protruding portion is formed near the boundary between the large diameter portion and the small diameter portion, and the protrusion protrudes in a direction perpendicular to the axis of the shaft member, and the small diameter portion is inserted into the stamper. and performing the centering by inserting the large diameter part into the substrate, and performing the facing with an end face of the large diameter part at the boundary with the small diameter part brought into close contact with the stamper, An apparatus for duplicating information recording media, wherein the substrate to which the resin is cured and adhered is pushed up by the protruding portion to peel the substrate from the stamper.