JPH01276449A - Manufacturing equipment for optical information recording medium - Google Patents

Abstract

PURPOSE:To separate a resin layer from a stamper without fail by sending air to the central part of the resin layer in a condition that a recording resin layer is formed between a stamper and a substrate. CONSTITUTION:A center pin 11 is set to a rising position and resin 36 is set in a ring shape on the surface of a stamper 18. A disk substrate 29 is carried on the pin 11 by a substrate carrying mechanism 40 and set on a supporting stand 27 and a weight 31 is loaded on the substrate. Next, the pin 11 is caused to fall down to a position just before the lower surface of the substrate 29 contacts to the resin 36 and after that, the pin is caused to intermittently fall down for the unit of micron. One part of the resin contacts to the surface of the substrate 29 and the pin 11 falls down until the whole circumference of the ring is contacted. At such a time, bubbles are exhausted through an air route 23. Next, the resin 36 is irradiated through the transparent weight 31 by ultraviolet rays and the resin is set. Then, a resin layer 41 is formed on the substrate 29 and united and after that, the air is sent from the air route 23 to the central part on the lower surface of the substrate 29. Then, the recording resin layer 41 is separated from the surface of the stamper 18.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to the manufacture of optical information recording media such as optical discs, which are used for recording data in audio, video, and information equipment. Regarding equipment.

[Prior Art] This type of optical information recording medium is disclosed in, for example, Japanese Patent Application Laid-Open No. 62-187.
As shown in Publication No. 004, a resin that can be cured by ultraviolet rays is injected between the master stamper on which data is recorded and the disk substrate, and is cured by irradiating it with ultraviolet rays. The disk substrate is manufactured by forming a resin layer on which the recording surface of the stamper is transferred on the surface of the disk substrate.

In order to peel off this resin layer from the stand bar,
A push-up body set at the center of the disk substrate is pushed up from below by a bottle and air pressure, and the push-up body pushes up the resin layer together with the disk substrate to separate it from the stand bar.

However, in this case, a large bending force acts not only on the disk substrate but also on the resin layer, which may not only damage the recording transfer surface but also cause distortion of the disk. Further, when the board is pushed up, the stand bar is also lifted up.

An example of holding a stand bar on a table is
As shown in Japanese Patent No. 47253, a stand bar made of a magnetic material is held by means for holding the stand bar with a first electromagnet corresponding to the center thereof and a ring-shaped second electromagnet corresponding to the outer periphery of the stand bar, When the resin layer is to be peeled off from the stand bar, only the first electromagnet in the center is turned off, and only the outer peripheral part of the stand bar is held by the second electromagnet in the outer peripheral part. Then, in this state, the stand bar is moved in a direction away from the resin layer, so that the resin layer is sequentially peeled off from the outer circumference of the stand bar. However, this method not only requires complex control of the electromagnet, but also results in the application of a large peeling force to the resin layer.

[Problem to be solved by the invention] This invention has been made in view of the above points,
In particular, when a resin layer is formed between the disk substrate and the standber, on which the recording of the standby is transferred, the resin layer can be smoothly peeled off from the standber, and it can be reliably prevented from peeling off from the table. It is an object of the present invention to provide an optical information recording medium manufacturing apparatus that can easily and reliably manufacture highly reliable optical discs and the like by easily automating processes.

[Means for Solving the Problems] In the optical information recording medium manufacturing apparatus according to the present invention,
A guide ring is set in the center of the table made of magnets, and the stand bar is fixedly held on the table by magnetic attraction by fitting into this guide ring. A center pin that moves up and down is set, and the board is supported and set by this setter. An air release hole is formed in the center of the tape so that air is released between the stand bar and the resin layer.

[Function] According to such an optical information recording medium manufacturing apparatus, the standby is held on the table by magnetic attraction and air attraction, and its position is set and fixed by the guide ring. The stand bar is firmly held and set and can be easily replaced. In addition, with the hardened recording resin layer formed between the disk substrate and the standber, the center bin is raised a minute amount so that the center part of the disk substrate is separated from the stamper surface by a minute amount and a gap is formed in the center of the table. Air is sent into the gap from the center part 6, and the resin layer is sequentially peeled off from the center part. Therefore, without applying a peeling force to the resin layer (the resin layer integrated with the substrate is peeled off from the standber,
Optical discs can now be manufactured in a highly reliable state. In this case, the peeling operation is performed by simple vertical movement of the center bin and control of air release from a part of the center, and can be easily automated.

[Embodiments of the invention] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows its overall configuration, and this manufacturing apparatus includes a center pin 11 that is the center of operation. The center bin 11 is set movably in the axial direction within a hollow portion of a valve member 12 which is configured in a cylindrical shape and is set in a vertical state. It is set in the hollow part so as to be freely movable in the axial direction. That is, the center pin 11, the valve member 12, and the support member 13 are constructed coaxially, and the support member 13 is made perpendicular to the fixedly set base 15 by the bearing mechanism 14, and is rotatable. will be supported by

The support member 13 is integrally provided with a gear 131 and is selectively rotationally controlled, and a support base 16 is formed above the gear so as to spread out on a plane. In this receiver, a disk-shaped table 17 is placed on a stand 16, and a metal stamper 18 placed on the table 17 is held by magnetic force. In this case, the magnet is used to fix the stamper 18, so the table 1
It is sufficient that the magnet acts on the surface of the table 17, and the entire table 17 does not need to be a magnet.

Here, the stamper 18 has a round guide hole formed in its center, and an uneven surface for recording digital data is formed on its upper surface.

The position on the table 17 is fixed by a guide ring 19 formed integrally with the table 17.

The upper inner circumferential surface portion of the guide ring 19 constitutes a valve seat formed in a tapered surface. The valve body 20 that has been moved is brought into contact with or separated from the valve member 12 in accordance with the movement of the valve member 12 in the vertical direction indicated by the arrow A.

That is, when the valve member 12 is positioned downward as shown in this figure, the valve body 20 is in contact with the valve seat of the guide ring 19, and the valve member 12 is switched upward from this state. In the state, the valve body 20 and the guide ring 19
A passage is formed between the valve seat and the valve seat.

This passage communicates with a passage 21 formed in the receiver 16, and although not shown in detail in the figure, this passage 21 communicates with a vacuum source. That is, when the valve body 20 is lifted away from the guide ring 19, suction is applied from the center of the upper surface of the table 17 by the vacuum source.

This vacuum source also communicates with air suction holes formed in the table at the inner periphery of the stamper at the outer periphery of the guide ring.

The center pin 11 has an air passage 22 formed in its axis, and this passage 22 communicates with a passage 23 formed in the valve member 12 so as to open upwardly, and air is fed into the passage 22. Air is discharged from the plate 24 toward the upper surface of the table 17 through a disk-shaped receiver formed at the center of the table 17, and is used for peeling off the recording resin layer, which will be described later.

This center pin 11 is moved by an arrow B by a drive mechanism 25.
The movement is controlled in the vertical direction as shown in . The drive mechanism 25 includes a screw shaft 2 rotated by a servo motor 251.
52, and a moving body 253 screwed onto this screw shaft 252.
The center pin 11 is supported by the rotation angle of the servo motor 251 so that the center pin 11 can be precisely controlled to move vertically in units of μm. The servo motor 251 is
The rotation angle is controlled by a control circuit 26 that is configured by a microcomputer or the like.

A support stand 27 is formed in the shape of a collar above the center pin 11, and a guide pin 28 is provided to protrude above the support stand 27. Then, the disk substrate 29 is placed on the support base 27 so that the center position is set by the guide bin 28.

This disk substrate 29 is made of thermosetting resin such as epoxy, epoxy vinyl ester, unsaturated polyester, etc.
It is composed of a thermoplastic resin such as polymethyl methacrylate or polycarbonate, or a light-transmitting material such as glass.

A disk-shaped weight 31 made of a transparent material such as glass is placed on the disk substrate 29 supported by the center pin 12 by a movable table 30. The movable table 30 is appropriately set in the chamber 32 so as to be vertically movable. This chamber 32 is designed to be moved up and down as shown by arrow C, and when it is set to move downward as shown in the figure, a table 17 is mounted on the upper surface of the base 15. A chamber 33 that is sealed around the surroundings is formed.

Inside the chamber 33, although not shown in the figure, an ultraviolet light source is set above the weight 31, so that ultraviolet light passes through the transparent weight 31 and irradiates the inside. .

Incidentally, a resin 36, which is a material for forming the recording layer of the optical disc, is placed on the surface of the stand bar 18. This resin 36 is made of a 2P resin material that is cured by irradiation with ultraviolet light, and is a liquid resin having an acrylic group and/or methacrylic group at the end, such as an acrylic acid and/or methacrylic acid ester of an epoxy resin, a polyester resin. acrylic and/or methacrylic esters of polyether resins, urethane resins with acrylic and/or methacrylic groups at their ends, and liquid resins with acrylic and/or methacrylic groups. It is composed of diluted reactive monomers with .

Then, while rotating the table 17, the resin 36 is placed in a ring shape on the metering stand bar 18 using a nozzle or the like.

FIG. 2 shows the process of manufacturing the recording layer portion of an optical disc using the apparatus configured as described above, especially the center bin 1.
1 shows the flow of processing in the control circuit 26 that controls the movement of the motor. First, in step 101, the center bin 11
is set in the raised position as shown in FIG. In this state, the center bin 11 is placed on the surface of the standby bar 18.
The resin 36 is set in a ring shape with . Then, with the center bin 11 set to be raised, the disk substrate 29 is moved by the substrate transport mechanism 40.
is conveyed onto the center bin 11, and this center bin 1
A substrate 29 is set on the support stand 27 formed in 1. In this state, the chamber 82 is raised from the state shown in FIG. 1 so as not to interfere with the movement of the transport mechanism 40.

Once the disk board 29 is set in the center bin 11 in this way, as shown in FIG.
A weight 31 is placed on top of the chamber 32, and in this state the chamber 32 is lowered as shown in FIG. Further, in this state, the valve member 12 is set at a lower position.

After the disk substrate 29 is set in this way and the weight 31 is further set on this substrate 29, in the next step 102, the center bin 11 is placed on the stand bar so that the distance between the stand bar 18 and the board 29 is adjusted. It descends until it reaches the first position, which is slightly larger than the height of the ring-shaped resin 36 placed thereon. That is, the state is as shown in FIG. 5, and in this state, the lower surface of the disk substrate 29 is just before contacting the ring-shaped resin 36.

If the center bin 11 is set to descend in this way,
Next, as in step 103, the center bin 11 is controlled to be lowered in micron units every one to several seconds. That is, the disk substrate 29 is intermittently lowered in micron units, and during this lowering process, a portion of the ring of the resin 36 comes into contact with the surface of the substrate 29, and this contact portion is gradually expanded, causing the resin 36 to be lowered. The entire circumference of the ring is brought into contact with the substrate 29.

In step 104, it is determined whether the distance between the stand bar 18 and the board 29 has reached the second position, and when this distance has reached the second position, the center bin 11 is stopped from descending. Proceed to step 105. Here, the above second
The position is an empirically determined value that brings the entire circumference of the ring of resin 36 into contact with the substrate 29.

In step 105, the center bin 11 is lowered 7,
The position where the support surface of the support base 27 of the substrate 29 of the center bin 11 is at a predetermined height from the surface of the standber 18, specifically, the thickness of the recording layer made of resin of the optical disc manufactured from the surface of the standber 18. so that it is set at a height corresponding to . In this case, the disk substrate 29 is made of resin 3.
6, and the center bin 1
Only 1 will be lowered.

At this time, the valve member 12 is simultaneously switched to the raised position,
As shown in FIG. 6, the valve body 20 is separated from the guide ring 19, and an intake passage is formed between the guide ring 19 and the valve body 20.

That is, in this state, a room surrounded by the ring-shaped resin 3B is formed between the standber 18 and the disk substrate 29, and this room is sucked in by the vacuum source, and the resin 36 The load of the weight 31 acts on the resin 3B, and gradually crushes the resin 3B.

When the disk substrate 29 comes into contact with the ring-shaped resin 36 in this way, air bubbles may be mixed into the resin 3B. However, as described above, the substrate 29 is lowered intermittently in microns per second, and after the substrate 29 and the resin 3B first come into contact at one point, this contact point is extended left and right along the ring. When the contact portion is formed in a ring shape, air bubbles are effectively prevented from entering the resin 36.

In this way, even if the disk substrate 29 and the resin 36 are in contact with each other, and even if air bubbles are mixed in the resin 3B, the entire circumference of the ring-shaped resin 3G is in contact with the substrate 29. An operation is performed to suck the resin 36 from the center with a small amount of vacuum. By sucking and moving the resin 36 inward in this manner, the air bubbles inside the resin 36 are pushed out toward the outer circumference, and this phenomenon has been confirmed through repeated experiments.

In step 10B, the above state is waited for a predetermined time, for example, 5σ seconds, and during this time, the ring-shaped resin 36 is pushed open by the load of the weight 31, and the disk substrate 29
decreases as the height of the resin 36 decreases. Then, when the resin 36 has finished spreading between the stamper 18 and the substrate 29, the disk substrate 29 hits the support base 27 of the center pin 11 set at the lowered position and stops.
The state will be as shown in the figure. In this case, the gap between the standber 18 and the substrate 29 is set numerically accurately by the lowered setting position of the center pin 11, and the thickness of the resin 36 on the group surface of the stamper 18 can be easily controlled. And done accurately.

Here, the mounting position of the stamper 1B is set accurately by the guide ring 19, and the stamper 18 is effectively prevented from peeling off. A passage 21 communicating with a vacuum source is opened at the lower side of the housing. Therefore, when the resin 36 is spread on the surface of the stamper 18 as described above, even if the resin may wrap around from the inner peripheral edge to the back surface of the stamper 18, this wrapped resin can be reliably collected and removed by vacuum suction. Become so.

As described above, the resin 3 is placed between the stamper 1B and the substrate 29.
Once the layer 6 is formed, the substrate 29, weight 31, etc. are rotated together with the table 17 as shown in FIG. The spread resin 3B surface is uniformly irradiated via the weight 31, and the resin is cured to form the recording resin layer 41. This recording resin layer 4
This stamper 18 is placed on the surface facing the first stamper 18.
Digital data from the unevenness formed on the surface is transferred,
This resin layer 41 forms the recording surface of the optical disc.

In this way, the resin layer 41 on which the recording surface is formed is formed so as to be integrated with the disk substrate 29, completing the basic structure of the optical disk.After this, the substrate 29 and the resin layer 41 are formed. 41 must be peeled off from the surface of the stamper 18 in one piece.

Here, the stamper 18 is held on the table 17 by magnetic attraction, and its position is accurately set by a guide ring 19. Therefore, the stamper 18 can be relatively easily removed from the table 17 and easily replaced. On the other hand, when trying to peel off the recording resin layer 41 from the stamper 18, it is necessary to remove the resin layer 41 from the stamper 18. When the stamper 18 is lifted in the direction of separating it from the stamper 18, the stamper 18 also separates from the table together with the resin.

However, in this apparatus, the recording resin layer 41 is easily peeled off from the stamper 18 without lifting the stamper, and the peeling process will be explained below.

First, as shown in step 107 and shown in FIG. 9, the center pin 11 is raised by a minute amount. In this case chamber 2
2 is set to be raised, and the lower position of the valve member 12 is switched and moved so that suction is drawn from the suction hole 50 communicating with the vacuum on the outer periphery of the guide ring 19. Then, air is sent through an air passage 22 formed in the central shaft portion of the center pin 11 and a passage 23 formed in the valve member 12, and the receiver is discharged from the plate 24 portion. This air is sent from the lower surface of the support base 27 to the lower surface of the central portion of the disk substrate 29 and further between the recording resin layer 41 and the standber 18, thereby peeling the resin layer 41 from the surface of the standber 18. Then, the weight 31 is also removed and raised.

Then, in this state, when the center bin 11 is further raised as in step 108, the resin layer 41 is smoothly peeled off from the surface of the stand bar 18, as shown in FIG. At this time, the stand bar 18 is closely fixed to the table by the magnetic force of the magnet set on the table and the suction force by the suction hole 50. Then, the resin layer 41 to which the recording has been transferred is raised to the transport position together with the disk substrate 29. Once raised to the transport position in this manner, the transport mechanism 40 picks up the disk substrate 29 on which the resin layer 41 is formed and transports it to a predetermined storage position. Although not shown in the figure, the disk substrate 29 on which the recording resin layer 41 is formed moves to a resin protective film forming step, in which a protective layer made of a light-transmitting resin is formed on the surface of the recording resin layer 41. Then, the optical disc is completed. Further, a label or the like is attached to the outer surface of the substrate 29 as necessary.

[Effects of the Invention] As described above, according to the optical information recording medium manufacturing apparatus according to the present invention, the recording resin layer made of a resin material that is cured by ultraviolet rays for recording digital data can be used between the standber and the disk substrate. The central portion of the recording resin layer is raised by a small amount in the state formed between the resin device and the stamper, and air is introduced between the resin device and the stamper. Therefore, the recording resin layer is peeled from the standber by the introduced air, and during this peeling operation, almost no force is applied to the standber in the direction away from the table. Therefore, even if the standber is magnetically attracted and held on the table for easy replacement, the process of peeling off the recording resin layer can be performed reliably.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional configuration diagram illustrating an optical information recording medium manufacturing apparatus according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating the flow of processing in the control circuit for controlling the center bin of the apparatus, in particular. FIGS. 3 to 10 are diagrams sequentially explaining the manufacturing process of the optical disc, especially the recording resin layer. 10... Center bin, 12... Valve member, 13...
・Supporting member, 17...Table (permanent magnet), 18・
... Stand bar, 19... Guide ring, 20... Valve body, 21... (Vacuum) passage, 22.23... (Air) passage, 25... Drive mechanism, 26... Control circuit, 2
9... Disc substrate, 31... Weight (glass), 3
2...Chamber, 36...Resin. Applicant's representative Patent attorney Takehiko Suzue Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Page 9 Commissioner of the Patent Office Yoshi 1) Tsuyoshi Moon 1, Indication of the case Patent application No. 102670/1983 2, Invention Name of manufacturing equipment for optical information recording media 3. Relationship with the Ministry case for amendment Patent 8: 18 people Global Machinery Co., Ltd. (and 1 other person) 4. Agent 3-7-2 Kasumigaseki, Chiyoda-ku, Tokyo 100
Telephone 03 (502) 3181 (Main) (5847)
) Patent Attorney Takehiko Suzue 5, spontaneous amendment 6, detailed description of the invention column and drawing 7 of the specification to be amended, contents of the amendment (1) Line 20 of page 2 of the specification attached to the application "Tampa's record surface..." is replaced with "Tampa's record data..."
” he corrected. (2) Similarly, on page 3, line 16 of the specification, the phrase "...consists of an electromagnet" is corrected to "consists of an electromagnet." (3) Similarly, on page 7, lines 13 and 14 of the specification, the phrase ``...the upper surface is formed with unevenness'' was replaced with ``...the There are irregularities such as groups and information bits formed on the top surface.'' (4) Similarly, page 16, line 11, lines 11 to 12 of the specification.
In the first line, "...group surface..." is corrected to "...data recording surface...". (5) Similarly, in the 7th line of page 17 of the specification, the statement "...table 17 rotations..." is corrected to "...table 17 rotations...". (6) Similarly, on page 17, line 13 of the specification, there is a statement that says ``The digital data...'' [The personal record data...
・” I corrected it. (7) Similarly, on page 18, lines 15 to 19 of the specification, the statement ``...in this case, the chamber 22 is designed to...suction...'' is replaced with `` ... In this case, the chamber 32 is set upward, and the valve member 12 is set in a downward position so that the passage communicating with the vacuum between the guide ring 19 and the valve seat 20 is closed. I'll keep it...'' I corrected myself. (8) Similarly, in the specification, from page 19, line 19 to page 20, line 3, the statement ``Although not shown...labels, etc. are included in the male tube.'' was replaced with ``not shown. Not a reflective layer,
An optical disc is completed through a recording film formation process or a protective film formation process. ” he corrected. (9) Similarly, in the 6th line of page 20 of the specification, the phrase ``...digital data...'' is corrected to [...groups, information bits, etc....J]. (10) Figures 2, 9, and 10 of the attached drawings are corrected as shown in the attached sheets. Figure 9 Figure 10

Claims (1)

[Claims] A recording resin layer to which a recording surface of the stamper is transferred is set between a light-transmitting substrate supported by a center pin and a stamper set around the center pin. In an apparatus for manufacturing an optical information recording medium, the center pin is set as the central shaft part, and a guide ring is set on the upper surface of the center pin to be applied to the inner diameter part of the stamper, and the stamper made of a magnetic material is magnetically moved. a table configured to include a magnet so as to be held by an attractive force; an air discharge hole formed in the center of the table in a position close to the outer periphery of the center pin; and a suction hole for sucking the stamper formed on the table below the inner diameter of the stamper, and the recording resin layer integrated with the light-transmitting substrate and the stamper adsorbed on the table. 1. An apparatus for manufacturing an optical information recording medium, characterized in that an air layer is formed between the stampers so that the stampers can be separated from each other while being held on a table.