JP2748547B2 - Information recording medium manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION An apparatus for manufacturing an information recording medium of the present invention will be described in detail according to the following items.

A. Industrial application fields B. Summary of the invention C. Prior art [FIGS. 8 to 10] D. Problems to be solved by the invention [FIGS. 8 to 10] E. To solve the problems F. Embodiments [FIGS. 1 to 7] a. Slide table b. Electromagnet plate c. Upper plate d. Disk stamper e. Fixing upper plate to slide table G. Effect of the invention (A. Industry) The present invention relates to a novel information recording medium manufacturing apparatus. Specifically, the disk substrate and the disk stamper are brought into contact with each other via a liquid resin, and the resin is cured and adhered to the disk substrate to be peeled off from the disk stamper. In an apparatus for manufacturing an information recording medium by transferring irregularities,
An object of the present invention is to provide a new information recording medium manufacturing apparatus which facilitates replacement of a disk stamper, improves versatility, and further facilitates maintenance.

(B. Summary of the Invention) The information recording medium manufacturing apparatus of the present invention includes an electromagnet plate mounted on a base table and an upper plate electromagnetically attracted on the electromagnet plate, and a disc stamper is mounted on the upper plate. By supporting, only the upper plate can be removed from the base table,
It is extremely easy to replace the disk stamper, for example, by replacing the disk stamper with the upper plate removed from the base table.In addition, only the upper plate can be replaced according to the purpose, improving versatility,
Furthermore, since the easily damaged upper plate can be easily replaced, various effects such as extremely easy maintenance can be achieved.

(C. Prior Art) [FIG. 8 to FIG. 10] There is a method called 2P method for manufacturing an information recording medium, for example, an optical disk such as a CD, LD, or LVD. Are brought into contact with each other via a liquid UV-curable resin so that the UV-curable resin completely covers the irregularities of the disk stamper. The resin is adhered to the disk substrate, and then the disk substrate and the ultraviolet curable resin layer adhered to the disk substrate are separated from the disk stamper.

An apparatus for manufacturing an optical disk according to the above-described 2P method includes an apparatus for holding a disk stamper by a so-called electromagnetic chuck method, and an outline thereof will be described below with reference to FIGS. 8 to 10.

Reference numeral a denotes a slide table which is guided by guide rods b and b and is moved by a moving mechanism (not shown).

Reference numeral c denotes a flat plate electromagnet that generates an electromagnetic attractive force when energized, and is fixed to the upper surface of the slide table a.
Although the flat electromagnet c is not fixed to the slide table a, it is not impossible to remove the flat electromagnet c. However, since it is necessary to strictly determine the level of the upper surface d and the positional accuracy with respect to the slide table a, it is fixed in an easily replaceable state. Not necessarily.

A disk stamper e made of nickel is fixed on the upper surface d of the plate electromagnet c, and the plate electromagnet c
And the electromagnetic force of the disk stamper e
Is exactly attracted to the upper surface d of the flat electromagnet c.

Then, a liquid ultraviolet curable resin g is supplied to one surface of a disk substrate f made of transparent glass, synthetic resin, or the like. Further, the disk substrate f is provided with a surface to which the ultraviolet curable resin g is supplied on a disk stamper e. It is superposed on the disk stamper e in a state where it is opposed.

Next, the disk substrate f is pressed toward the disk stamper e by the pressure roller h, so that the liquid ultraviolet curable resin g completely enters the fine irregularities of the disk stamper e.

Then, ultraviolet light is applied to the ultraviolet curing resin g through the transparent disk substrate f by the ultraviolet lamp i. Thereby, the ultraviolet curable resin g is cured, and the disk substrate f
Adhered to.

Therefore, the ultraviolet curable resin g obtained by curing the disk substrate f
At the same time, it is peeled off from the disk stamper e.

Thus, holding the disk stamper by the electromagnetic chuck method is also disclosed in Japanese Patent Application No. 61-146731, and according to this method, the entire surface of the disk stamper can be uniformly attracted. An uneven surface having excellent flatness following the upper surface d of the plate electromagnet c, that is, an uneven surface based on a plane having high surface accuracy is realized,
Therefore, there is an advantage that the signal surface of the optical disc formed by transferring this is also excellent in flatness, and furthermore, energization of the flat electromagnet c is turned on (ON) and off (OF).
Since the electromagnetic attraction force can be turned on and off by F), there is also an advantage that the mounting and dismounting of the disk stamper e can be performed efficiently.

(D. Problems to be Solved by the Invention) [FIGS. 8 to 10
By the way, in the disk stamper holding structure by the electromagnetic chuck method, the upper surface d of the flat electromagnet c is used.
When scratches or rust are generated on the slide table, the work using the slide table a holding the flat electromagnet c cannot be performed until the scratch or rust is removed by polishing or the like, and the loss due to maintenance is large. There is a problem. Also, the mounting and dismounting of the disk stamper e must be performed on the slide table a, and in some cases,
There is a problem that the work space is narrow and workability is deteriorated.
Furthermore, when it is desired to change the thickness of the disk substrate, it is necessary to adjust the pressing force by moving the pressure roll up and down accordingly. However, there is often a limit to the amount of vertical movement of the pressure roll due to design. In addition, it is necessary to reset the conditions such as the pressure balance with the vertical movement of the pressure roll, which causes a problem that the thickness of the disk substrate cannot be easily changed.

Furthermore, it is difficult to change the material, shape and size of the flat electromagnet, and there is a problem that versatility is poor.

(E. Means for Solving the Problems) In order to solve the above-described problems, the information recording medium manufacturing apparatus of the present invention includes an electromagnet plate mounted on a base table and electromagnetically attracted onto the electromagnet plate. An upper plate is provided, and the disk stamper is supported on the upper plate.

Therefore, according to the information recording medium manufacturing apparatus of the present invention, even if the disc stamper mounting surface is scratched or rusted, replacing the upper plate only with another one does not cause any trouble in the operation. During this time, the original upper plate that has been damaged or rusted may be repaired. In addition, the work of mounting and removing the disk stamper may be performed by removing the upper plate from the electromagnet plate and moving it to a place where a sufficient working space can be secured. Further, when it is necessary to change the thickness of the disk substrate, the thickness of the upper plate is changed so that the height of the pressure roll does not need to be changed, that is, by changing the upper plate to a different thickness. In addition, the thickness, shape, material, and the like of the upper plate can be easily changed according to various purposes, and versatility is significantly improved. Furthermore, it is easy to prepare a plurality of upper plates on which different disk stampers are mounted in advance, and to use them by appropriately replacing them as necessary. It has many advantages, such as being possible.

(F. Embodiment) [FIGS. 1 to 7] The details of the information recording medium manufacturing apparatus of the present invention will be described below with reference to the illustrated embodiment.

(A. Slide Table) Reference numeral 1 denotes a slide table, which is guided by rails 2 and 2 to move on a predetermined system route.

Reference numeral 3 denotes a base of the slide table 1, and leg pieces 4, 4 are fixed to the lower surface thereof, and the leg pieces 4, 4 are slidably engaged with the rails 2, 2, respectively.

Reference numeral 5 denotes a mounting base, which is fixed to the base 3 via columns 3a, 3a,... Erected at four corners of the base 3.

Reference numeral 6 denotes an air cylinder fixed to the center of the upper surface of the base 3, and a tap adapter 7 is fixed to the upper end of a piston rod 6a that moves up and down.

The tap adapter 7 is known, and when a rod-shaped object is inserted into the hole 7a opened at the upper end, it can be moved in the insertion direction, but is prevented from moving in the extraction direction. By pressing a release portion (not shown), the one inserted into the hole 7a can be extracted.

A hole 5a is formed in the center of the mounting table 5, and a hole 7a of the tap adapter 7 faces upward through the hole 5a.

(B. Electromagnet Plate) Reference numeral 8 denotes a plate-shaped electromagnet plate, which is fixed on the mount 5 of the slide table 1 via the support 9.

The electromagnet plates 8 each include a ferromagnetic body 10 extending in the same direction,
, And a separator made of a material having low magnetic permeability
, And are alternately arranged and integrated, and a strong electromagnetic attraction force is generated by energizing a magnetic field line generator (not shown) attached thereto. .

A mounting hole 8a is formed at the center of the electromagnet plate 8, and an upper end of a synthetic resin guide sleeve 12 is press-fitted and fixed in the mounting hole 8a. 7 is opposed to the hole 7a from above.

(C. Upper plate) 13 is a flat upper plate, and the upper plate 13 also has ferromagnetic substances 14, 14,.
..And separators 15, 15, made of a material having low magnetic permeability
Has a structure in which and are alternately arranged and integrated.

The ferromagnetic bodies 10, 10,... Of the electromagnet plate 8 and the ferromagnetic bodies 14, 14,. The separators 15, 15,... Of the plate 13 have the same width, respectively. Therefore, the electromagnet plate 8 and the upper plate 13 have the respective ferromagnetic materials 10, 10,. , And also separators 11, 11, ..., 15, 15, ...
Can be overlapped so that they overlap exactly.

A positioning hole 16 is formed at the center of the upper plate 13, and a positioning hole 16 is formed on the lower surface of the upper plate 13.
A recess 17 is formed at a position surrounding the recess 16. Therefore, the lower end of the positioning hole 16 opens into the concave portion 17.

(D. Disk stamper) 18 is a nickel disk stamper,
Fine unevenness (not shown) in the shape of a signal pit is formed on 18a. And the lower surface 18b is formed in a plane.

A center hole 19 is formed at the center of the disc stamper 18, and the center hole 19 is formed to have the same diameter as the positioning hole 16 of the upper plate 13.

A fixing ring 20 has a tubular portion 21 whose outer diameter is substantially the same as the diameter of the positioning hole 16 of the upper plate 13 and the center hole 19 of the disc stamper 18, and is slightly outward from the upper end of the tubular portion 21. The overhanging flange portion 22 is integrally formed,
A thread groove is formed on the outer surface of the lower end of the tubular portion 21 so that the thread portion 23 is formed.
It has been.

Reference numeral 24 denotes a nut that is screwed into the screw portion 23 of the fixing ring 20.

The mounting of the disc stamper 18 on the upper plate 13 is performed as follows.

First, the disk stamper 18 is overlapped so that its lower surface 18b is in contact with the upper surface of the upper plate 13, and the center hole 19 of the disk stamper 18 is aligned with the positioning hole 16 of the upper plate 13.

Then, the tubular portion 21 of the fixing ring 20 is inserted from above in the order of the center hole 19 of the disc stamper 18 and the positioning hole 16 of the upper plate 13, and the screw portion 23 of the fixing ring 20 protruding into the concave portion 17 of the upper plate 13. The nut 24 is screwed on. As a result, the opening edge of the center hole 19 of the disk stamper 18 is sandwiched between the flange portion 22 of the fixing ring 20 and the upper surface of the upper plate 13.

(E. Fixation of the upper plate to the slide table) 25 is a center pin, which is a tubular main part 26 and the main part.
A head 27 is fixed to the upper end of the head 26, and a peripheral portion 28 of the head 27 projects outward in a flange shape. An annular concave portion 28a whose inner end is limited by the outer peripheral surface of the main portion 26 is formed on the lower surface of the peripheral portion 28. The concave portion 28a has a size such that the flange portion 22 of the fixing ring 20 fits therein exactly.

Therefore, first, the upper plate 13 holding the disk stamper 18 is placed on the upper surface of the electromagnet plate 8 as described above.

Then, the main part 26 of the center pin 25 is inserted from above in the order of the fixing ring 20 and the guide sleeve 12, and the lower end is inserted into the hole 7 a of the stub adapter 7.

Then, when the air cylinder 6 is driven to lower the piston rod 6a, the piston pin 6a is pulled by this and the center pin 25 is pulled.
Is lowered, and the upper plate 13 is pressed firmly against the electromagnet plate 8.

At the same time, the electromagnet plate 8 is energized and the upper plate
13 is magnetically attracted to the electromagnet plate 8, and the disk stamper 18 is also magnetically attracted to the upper plate 13, and its flat surface 18b
Follows the plane of the upper surface of the upper plate 13, and high flatness is realized.

When removing the upper plate 13 from the slide table 1, the power supply to the electromagnet plate 8 is turned off, the biting of the lower end of the center pin 25 by the tap adapter 7 is released, and the center pin 25 is fixed to the guide sleeve 12 and the guide sleeve 12. Ring 20
, The upper plate 13 may be moved from above the electromagnet plate 8.

Therefore, if the upper surface of the upper plate 13 is scratched or rusted, the disk stamper 18 is mounted on another upper plate 13 again, which is mounted on the slide table 1 and used. If the original upper plate 13 that has occurred is repaired, the operation will not be affected at all.

In addition, if a large number of upper plates 13 equipped with various different disk stampers 18 are prepared, these upper plates 13 can be easily replaced as needed,
Setup change is very easy.

Furthermore, if various upper plates 13 having different thicknesses, shapes, or materials are prepared, these can be easily replaced and used, and the versatility is greatly improved.

Furthermore, since the disk stamper is basically held on the upper plate 13 by magnetic attraction, not only a disk stamper having a circular center hole but also, for example,
It is also possible to use something like a strip-shaped disk stamper 18 'as shown in the figure.

In addition, as a temporary presser of the disk stamper 18,
The center part is held by the fixing ring 20, but as shown in FIG. 7, a concave part 29 is formed on the lower peripheral part of the upper plate 13 and the outer fixing part has a pressing edge 30 protruding inward at the upper end. The ring 31 is fixed to the upper plate 13 with screws 32, 32,..., The peripheral edge of the disk stamper 18 is pressed by the pressing edge 30, and the peripheral edge of the disk stamper 18 rises from the upper plate 13 during storage or transportation. Thus, it is also possible to prevent foreign matters from entering between the upper plate 13 and the peripheral edge of the disc stamper 18 from being damaged. Also, by doing this,
The lifting of the disk stamper 18 from the upper plate 13 when the disk substrate is peeled can be more reliably prevented as compared with the case where only the center portion is pressed.

As described above, since the surface of the disk stamper 18 is held by the electromagnetic attraction force, as shown in the above-described embodiment, the magnetic pole patterns of the electromagnet plate 8 and the upper plate 13 are made the same, so that It is possible to prevent a decrease in electromagnetic attraction force.

In addition, the positioning of the disc stamper 18 depends on the center pin 25, but when the center pin 25 is mounted,
Air may be blown out from the upper surface of the electromagnet plate 8 to facilitate the positioning operation.

(G. Effects of the Invention) As is apparent from the above description, the information recording medium manufacturing apparatus of the present invention brings a disk substrate and a disk stamper into contact with each other via a liquid resin, cures the resin, and An apparatus for manufacturing an information recording medium by transferring the unevenness of the disk stamper to the resin bonded to the disk substrate by peeling off the disk stamper by adhering to the disk substrate, an electromagnet plate attached on a base table, An upper plate is provided on the electromagnet plate so as to be electromagnetically attracted, and a disk stamper is supported on the upper plate.

Therefore, according to the information recording medium manufacturing apparatus of the present invention, even if the disc stamper mounting surface is scratched or rusted, replacing the upper plate only with another one does not cause any trouble in the operation. During this time, the original upper plate that has been damaged or rusted may be repaired. In addition, the work of mounting and removing the disk stamper may be performed by removing the upper plate from the electromagnet plate and moving it to a place where a sufficient working space can be secured. Further, when it is necessary to change the thickness of the disk substrate, the thickness of the upper plate is changed so that the height of the pressure roll does not need to be changed, that is, by changing the upper plate to a different thickness. In addition, the thickness, shape, material, and the like of the upper plate can be easily changed according to various purposes, and versatility is significantly improved. Furthermore, it is easy to prepare a plurality of upper plates on which different disk stampers are mounted in advance, and to use them by appropriately replacing them as necessary. It has many advantages, such as being possible.

In the above embodiment, in order to make the magnetic pole pattern of the electromagnet plate and the upper plate the same, these were composed of a ferromagnetic material and a separator, and the arrangement pattern was made the same. If it is not necessary to make the magnetic pole patterns the same, this need not be the case.

In addition, any of the structures shown in the above embodiments are
It is merely an example of embodying the present invention, and the technical scope of the present invention is not to be construed as being limited thereto, and various modifications may be made without departing from the scope of the present invention. It is possible to carry out the present invention with modifications.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 7 show an embodiment of an apparatus for manufacturing an information recording medium according to the present invention. FIG. 1 is an exploded perspective view, FIG. 2 is a plan view, and FIG. Is a sectional view taken along the line III-III in FIG. 2, FIG. 4 is an exploded sectional view of a main part, FIG. 5 is an enlarged sectional view of a main part,
FIG. 6 is a schematic perspective view when a disk stamper having a different shape is used, FIG. 7 is a schematic cross-sectional view showing a modification of temporary holding of the disk stamper on the upper plate, and FIGS.
FIG. 10 shows an example of a conventional information recording medium manufacturing apparatus. FIG. 8 is a schematic perspective view, and FIGS. 9 and 10 are schematic side views showing different steps. DESCRIPTION OF SYMBOLS 1 ... Base table, 8 ... Electromagnetic plate, 13 ... Top plate, 18 ... Disc stamper, 18 '... Disc stamper

Claims (1)

(57) [Claims] A disk substrate and a disk stamper are brought into contact with each other via a liquid resin, and the resin is cured and adhered to the disk substrate to be peeled off from the disk stamper. An apparatus for manufacturing an information recording medium by transferring irregularities of a stamper, comprising: an electromagnet plate mounted on a base table; and an upper plate electromagnetically attracted on the electromagnet plate, and supporting the disc stamper on the upper plate. An information recording medium manufacturing apparatus characterized in that: