JPH09198720A - Method for sticking together optical recording information medium and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an excellent stuck disk having no projected part, etc., by satisfactorily removing air bubbles mixed in an adhesive or between disks of laminated disks and further curing the adhesive in a bubble-removed state. SOLUTION: In the method for sticking together laminated disks 30 which are composed by holding the adhesive between one side and other side of disks capable of optically recording and reproducing, the laminated disks 30 are positioned in a hermetically sealed space P and when the hermetically sealed space P is evacuated to vacuum, an O ring 9 sealing a chamber 6 of a rigid body is deformed by the pressure added from an outer part to the chamber 6 of the rigid body forming the hermetically sealed space P. The laminated disks 30 are pressurized by at amount by which the sealing clearance is reduced in accordance with the deformation of the O ring 9 and air bubbles in the adhesive between the laminated disks 30 are sucked to the outside by air suction by evacuation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for laminating optical information recording media, and more particularly to a laminating technique for a disc on one side and a disc on the other side.

[0002]

2. Description of the Related Art As is well known, use of an optical information recording medium having a large recording capacity has recently been considered. As this large-capacity optical information recording medium, two discs each having a recording layer, a metal reflective film layer formed on the recording layer, and a protective film layer formed on the metal reflective film layer are attached. Some are manufactured together. Then, a manufacturing apparatus for manufacturing an optical information recording medium formed by sticking the above two disks together has been considered. Specifically, the manufacturing apparatus described above includes a one-sided disc formed by molding a metal reflective film layer and a protective film layer on a one-sided disc substrate on which an optically recordable / reproducible recording layer is formed, and optically recording / reproducing. Optical information by bonding two discs with the other side disc having a recording layer formed on the other side disc substrate on which the metal reflection film layer and the protective film layer are formed A manufacturing apparatus for manufacturing a recording medium. Incidentally, in reading and reproducing the optical information recording medium, a beam for irradiating the optical information recording medium for reading the recorded information of the recording layer is irradiated from one direction to read and reproduce the recorded information. Is. Then, the present applicant has previously indicated the above-mentioned manufacturing apparatus in Japanese Patent Application No. 227360.

In the meantime, the above-mentioned optical information recording medium manufacturing apparatus includes an apparatus for adhering two superposed disks, and a press apparatus was provided as this adhering apparatus. Specifically, the above-mentioned pressing device is a pressing device that applies an adhesive and presses the two stacked discs from above with mechanical force, and the adhesive used is a self-curing adhesive. It was Then, during the pressing, the air bubbles in the adhesive of the superposed discs or the air bubbles mixed between the discs during superposition are discharged and removed by the pressing pressure.

[0004]

According to the above-mentioned prior art, when the overlapping discs are pressed by the above-mentioned pressing device, the bubbles in the adhesive or between the discs can be discharged to some extent and removed. ,
When trying to remove air bubbles in the adhesive or between the discs better, it was difficult to meet the demand. Specifically, when reading and reproducing the recorded information on the optical information recording medium, the irradiation light beam for reading can be properly read and reproduced only after obtaining a predetermined light flux on the recording layer. However, it is difficult to remove air bubbles in the adhesive or between the discs with the above-mentioned conventional pressing device, and the adhesive remains in the adhesive of the overlapping discs or between the discs while the air bubbles remain mixed. It was hardened, and as a result, air bubbles were easily mixed and contained in the adhesive or between the disks. Therefore, the bubbles become lens-like, and when the light beam for reading is irradiated, the light beam is refracted, and the above-mentioned predetermined light flux cannot be obtained, and reading and reproduction of recorded information cannot be performed well. It was something that would end up. That is, the presence of the air bubbles has been a cause of defects in product life, physical properties, and electrical characteristics that appear in the product when the optical information recording medium becomes a product.

Therefore, the object of the present invention is to better remove air bubbles mixed in the adhesive of the overlapping discs or between the discs, and to cure the adhesive with the air bubbles removed. , A technique for obtaining a good bonded disk in which air bubbles are less mixed in the adhesive or between the disks.

[0006]

In order to achieve the above object, the present invention has the following technical means. That is, this will be described using reference numerals in the accompanying drawings corresponding to the embodiments,
The present invention relates to a method for laminating a laminated disc 30 in which an adhesive is sandwiched between one side and the other side discs which can be optically recorded / reproduced. An O-ring 9 that seals the rigid chamber 6 by an external pressure applied to the rigid chamber 6 forming the sealed space when the closed space 30 is evacuated. Is deformed, and the stacking disk 30 is pressurized by the amount by which the seal gap S is reduced due to the deformation of the O-ring 9, so that air suction by the vacuuming causes air bubbles in the adhesive of the stacking disk 30. Is a method of pasting optical information recording media, which is characterized in that is sucked to the outside.

Another characteristic part is that a photo-curable adhesive is used as the adhesive, and the overlapping disc 3 is used.
In the state where 0 is pressed, the above-mentioned superposition disc 3
It is characterized in that the adhesive of No. 0 is irradiated with light to cure the adhesive within the time when the overlapping disc 30 is being pressed.

An apparatus for realizing the above-mentioned bonding method is a bonding apparatus 1 for a stacked disk 30 in which an adhesive is sandwiched between one side and the other side disks which are optically recordable / reproducible. The laminating apparatus 1 includes a chamber 6 that is evacuated in a state where the laminating disc 30 is covered, an upper press plate 7 that presses the laminating disc 30 from above, and the laminating disc 30 is pressed from below. The lower press plate 8 and the chamber 6 are movable in the up-and-down direction Z to define an internal space P having a lower opening 6D, and the lower opening 6D overlaps the inner space P. The fitting disk 30 has a size that can be accommodated in a horizontal state, and an O-ring 9 is attached to the lower end of the peripheral wall 6A that defines the internal space P. 9 is configured to seal the internal space P with a seal gap S between the lower end surface 6C of the peripheral wall 6A and the contact partner surface, and the upper press plate 7 is connected to the chamber. Fixed at -6,
When the chamber 6 is evacuated, the lower press plate 8 is in contact with the stacking disc 30 from above and the lower press plate 8 is in contact with the stacking disc 30 from below. Rigid chamber-6
Due to the external pressure applied to the superposing disc 30, the upper pressing plate 7 and the lower pressing plate 8 are
The optical information recording medium laminating apparatus is characterized in that the optical information recording medium is pressed from a state of being sandwiched between and by an amount corresponding to the reduction of the seal gap S due to the deformation of the O-ring 9.

Another characteristic feature is that the upper press plate 7 and the lower press plate 8 are light-transmissive press plates, and the adhesive is a photo-curable adhesive. Below the plate 8, the superposition disc 30 is placed.
A light irradiator for irradiating light is installed on the substrate, and is configured to irradiate the light to cure the adhesive when the superposition disc 30 is under pressure. And

Another feature is that the light irradiator is an ultraviolet irradiator 18 and the light transmissive press plate is quartz glass.

Further, the other characteristic part is that the inner surface of the chamber 6 reflects the light emitted from the light irradiator and reflects the light from above the superposing disk 30. It is characterized by being made.

[0012]

According to the above construction, the superposed disc 30 formed by sandwiching the adhesive between the one-side disc and the other-side disc is pressed by vacuuming. Thereby, the bubbles mixed in the adhesive or between the discs are
The air can be satisfactorily removed by being evacuated and discharged from the inside of the adhesive or between the disks. Also,
By pressing the laminated disc 30 by vacuuming and irradiating light to cure the adhesive, the two discs are bonded together in a state where bubbles in the adhesive or between the discs are well removed. You can
As a result, when the above-mentioned bonded disc becomes a product, it is possible to provide a good product in which air bubbles are not mixed in the adhesive or between the discs.

[0013]

Next, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. Referring to FIGS. 5 and 6, the laminating apparatus 1
Is equipped with a rotary table 2. The above rotation table 2
Is rotated by a predetermined angle in the rotation direction R by one step by the rotation drive unit 3 and makes one turn in eight steps. The rotation table 2 has eight stations, which are a disk supply station A, a first press station B, and
Second pressure station C, first UV curing station D, second UV curing station E, third UV curing station
Section F, disc ejection station G, and preliminary station H. By adopting the rotary table 2, the entire apparatus can be simplified and managed more easily than an apparatus using a conveyor or the like.

Each of the above stations is a disk pressing device 4
Are provided. They are the same, and paying attention to one of them, the disk pressurizing device 4 includes two pressurizing device main bodies 5 (see FIGS. 3 and 4). The two pressurizing device main bodies 5 are the same, and focusing on one pressurizing device main body 5, the pressurizing device main body 5 includes a rigid chamber 6, an upper press plate 7, and a lower press plate 8. (See FIGS. 1 and 2).

The lower press plate 8 is a member for applying pressure from the lower surface of the superposing disc 30, and is formed in a circular shape when seen from a plane. The lower press plate 8 is fixed so as to fit into the hole formed in the rotary table 2, and its upper surface 8A is a flat surface which is flush with the upper surface 2A of the rotary table 2. doing. The lower press plate 8 does not move because it is fixed to the rotary table 2, but the upper press plate 7 does not move.
When the pressure is applied from above, since the superposition disc 30 is received from below, the pressure is applied from below as a result.

A central groove 8B into which a tip of a shaft 10 described later is fitted is formed in the central portion of the upper surface 8A of the lower press plate 8. The superposition disc 30 is placed on the upper surface 8A of the lower press plate 8 so that the central groove 8B and the center hole 30A of the superposition disc 30 overlap. The lower press plate 8
Is a light-transmissive plate having a thickness of 10 mm in this example.
Quartz glass is used. The above-mentioned quartz glass is excellent in ultraviolet transmittance, and in the above-mentioned 10 mm quartz glass, 93% of ultraviolet U having a wavelength range of 360 nm used in this example is used.
It is transparent.

The rigid chamber 6 is a steel member having an internal space P and having a circular shape when seen in a plan view. . In this example, the inner diameter of the chamber-6 seen from the plane is 150 mm. Further, the lower portion is in an open state and has a lower opening portion 6D. The lower opening 6D
Is larger than the diameter of the superposition disc 30.
In addition, the lower end surface 6C of the peripheral wall 6A that defines the internal space P
Two O-rings 9 are attached to the. The O-ring 9 is for contacting the lower press plate 8 when the chamber 6 descends and sealing the inner space P of the chamber 6 so as to form a closed space.

The inner surface of the chamber 6 is formed as a reflecting surface 6B which reflects the ultraviolet rays U. In this embodiment, the reflecting surface 6B is formed by plating the inner surface with metal. Further, the ceiling portion 6E of the chamber 6 is formed by adjusting the angle so that the reflected ultraviolet rays U hit the overlapping disc 30 well. A vacuum drawing tube 15 is connected to the chamber-6, and the vacuum drawing tube 15 is
It is for sucking air in the internal space P when the internal space P becomes a closed space. A high pressure rotary valve is used for connecting the vacuum source.

A shaft portion 10 attached to the chamber 6 is located at the center of the chamber 6 in a state of extending in the vertical direction Z. The diameter of the shaft portion 10 is such that the shaft portion 1 is different from the center hole 30A of the overlapping disc 30.
0 has a diameter that fits exactly. The shaft portion 10 is movable in the vertical direction Z with respect to the chamber-6, and the vertically adjusted shaft portion 10 is fixed to the chamber-6. The circular upper press plate 7 is fixed to the tip of the shaft 10 when viewed from above. Specifically, the shaft portion 10 has two holding members 10A at the tip portion thereof, and the upper press plate 7 is fixed in a state of being held by the two holding members 10A. The holding member 10A has the same diameter as the non-recording layer portion of the overlapping disc 30. The non-recording layer portion is a portion between the recording layer and the center hole 30A.

The upper press plate 7 is a member for applying pressure from the upper surface of the superposing disc 30. The upper press plate 7 is a light transmissive plate, and in this example, quartz glass having a thickness of 10 mm is used. The above-mentioned quartz glass is excellent in ultraviolet transmittance, and in the above-mentioned 10 mm quartz glass, ultraviolet rays U whose wavelength range used in this example is 360 nm is used.
Is transmitted by 93%. By using quartz glass for the lower and upper press plates 8 and 7, ultraviolet rays U
Since it is easy to transmit the press plate, it is possible to use thick lower and upper press plates 8 and 7, and it is possible to provide a strong press plate.

The shaft portion 10 is supported at its intermediate portion by a support arm portion 11, and is provided with a slide bearing 12 between one end portion 11A of the support arm portion 11 and the shaft portion 10. The other end 11B of the support arm 11 is
It is fixed to the upper surface 2A of the rotary table 2. Further, a spring receiving portion 13 is provided on the upper portion of the shaft portion 10, and a spring 14 is attached between the spring receiving portion 13 and the one end portion 11A of the support arm portion 11. That is, the shaft portion 10 is movable in the vertical direction Z with respect to the one end portion 11A of the support arm portion 11, and is capable of moving the chamber 6 in the vertical direction Z.

The above description has focused on one of the pressurizing device bodies 5. The structure of the other pressurizing device body 5 is similar,
The shaft portions 10 of the two pressurizing device main bodies 5 are connected at the same height by the connecting arm portions 16. Then, the two pressurizing device main bodies 5 are provided with a push-down portion 17. The push-down portion 17 is for pushing down the pressurizing device main body 5 and comes into contact with the connecting arm portion 16 from above, and
The O-rings 9 of the two pressurizing device bodies 5 are the above-mentioned lower press plate 8
The display pressurizing device 4 is pushed down until it touches.
In this example, the push-down part 17 is moved up and down by an air cylinder, and its stroke width is 30 mm.
It is.

Next, at the positions of the first, second and third UV curing stations D, E and F, an ultraviolet irradiator 18 and a cooling blower-jetting pipe 19 are provided, respectively.
The ultraviolet irradiator 18 is located below the rotary table 2 and irradiates the superposition disc 30 with ultraviolet U. This ultraviolet irradiator 18 is a metal halide lamp 60W, 80W, 120W switching type. The amount of the cooling blower blown out from the cooling blower jet pipe 19 depends on the temperature setting in the ultraviolet irradiator 18 and the inverter.
Controlled and constantly maintaining the proper temperature.

In the above embodiment, the pressurizing device body 5 is used.
Although there is an example in which there are two, a single number or a plurality of three or more may be used. In addition, the upper press plate 7 and the lower press plate 8
Although it is made of quartz glass, it may be made of a material which transmits the light used for curing the adhesive.

With the above configuration, the usage will be described below. First, the one-side and the other-side disks to which the adhesive has been applied in the preceding step of the disk pressing device 4 are temporarily pressed with their adhesive-applied surfaces fitted to each other to form one superposed disk 30. An ultraviolet curable adhesive is used as the adhesive. Next, the two superposed discs 30 are simultaneously transferred to the disc supply station A.
At this time, the center holes 30A of the respective overlapping discs 30 have the central groove 8 of the lower press plate 8.
It is transferred in the state of being aligned with B.

Next, the push-down portion 17 is lowered to lower the shaft portion 10 and the chamber-6. The tip portion of the lowered shaft portion 10 passes through the center hole 30A of the overlapping disc 30 and fits into the center groove 8A of the lower press plate 8. As a result, the overlapping disc 30
Are accurately positioned. Further, the O-ring 9 of the chamber 6 comes into contact with the contacting surface, that is, the upper surface 8A of the lower press plate 8.

Next, the O-ring 9 contacts the lower press plate 8 and at the same time, the vacuum drawing tube 15 is used to form a chamber-
Air suction in 6 is started. In the suction, the pressure is gradually and evenly applied to the superposition disc 30 for a time sufficient to suck out the air corresponding to the volume of the chamber-6. When the suction is started, the superposing disc 30 is sandwiched between the upper press plate 7 and the lower press plate 8, and the superposing disc 30 is pressed by the amount t that the seal gap S becomes smaller. Works.

This will be described with reference to FIGS. 7 and 8. First, the gap between the lower end face 6C of the chamber 6 and the upper face 8A of the lower press plate 8 is defined as a seal gap S. When the O-ring 9 comes into contact with the lower press plate 8, the seal gap S = T before the suction starts. The above T is
The O-ring 9 has a protruding length protruding from the lower end surface 6C of the chamber-6. Next, when the suction is started, the O-ring 9 is pressed against the lower press plate 8 and the protrusion length is shortened by t.

That is, the seal gap S = T-t, and the seal gap S becomes smaller by t than that before the suction.
As a result, a pressure is applied to the overlapping disc 30 sandwiched between the upper and lower press plates 7 and 8 by the amount t that the seal gap S becomes smaller. In concrete terms, when the inner diameter of the chamber 6 is 150 mm, the pressure weight is 520 kg when the degree of vacuum is 7.5 × 10 −3 torr.
By sucking the air in the internal space P, dust and the like adhering to the superposing disc 30 can be removed, and in addition dust and the like are unlikely to adhere to the superposing disc 30 again.

Next, the superposed disc 30 which has been sucked and pressurized is conveyed to the first pressing station B as it is, and after a lapse of time, to the second pressing station C.
In the above suction pressurization, the degree of vacuum is 7.5X10-3 torr ~
When sucked at 8.0 × 10 -3 torr, the air contained in the adhesive or the air contained in the superposing step can be degassed to the μm unit. This suction pressurization is continued until the disc ejection station G. As a result, the overlapping disc 3
In the case of 0, the pressure is maintained until the adhesive is completely cured, and air does not re-enter the adhesive or between the disks.

The position of the upper press plate 7 in the vertical direction Z with respect to the chamber 6 becomes smaller when the seal gap S becomes smaller due to the deformation of the O-ring 9. The upper press plate 7 is set so as to press the superposing disc 30 within the range of minutes. More specifically, when the O-ring 9 comes into contact with the lower press plate 8, the seal gap S is S before the suction starts.
= T. At this time, it is assumed that the upper press plate 7 has just come into contact with the overlapping disc 30. From this state, when the seal gap S becomes S = T-t, the upper press plate 7 causes the overlapping disc 3 to move.
The compression width is t, which means that the pressure has decreased by t from the state of being in contact with 0. Make this the standard.

Next, when the seal gap S is S = T, the upper press plate 7 is moved to the superposition disc 30.
Slightly pressurize and is positioned below the upper press plate 7 in the above standard. From this state, when the seal gap S becomes S = T-t, the upper press plate 7 also descends by t, but the initial position of the upper press plate 7 is set to the standard position. Since the position is lower than the position, the compression width of the superposition disc 30 is larger than that of the standard disc.

Next, when the seal gap S is S = T, the upper press plate 7 is moved to the superposition disc 30.
Suppose it is located slightly above and away from. From this state, when the seal gap S becomes S = T-t, the upper press plate 7 also descends by t, but the initial position of the upper press plate 7 is set to the standard position. Since the position is raised above the position, the above-mentioned overlapping disc 3
In the case of 0, the compression width is smaller than that in the standard.

That is, even if the seal gap S is reduced by the same amount depending on the setting position of the upper press plate 7 with respect to the chamber 6 in the vertical direction Z, the upper press plate 7 is also reduced.
However, the compression width for compressing the overlapping disk 30 is different. For this reason, the set position is set in consideration of the type and state of the adhesive to be used and the overlapping disc 30.
Is to be adjusted to the position in which it is best bonded.

Next, the superposed disc 30 sucked and pressed by the first and second pressure stations B and C is conveyed to the first UV station D. Here, ultraviolet rays U are emitted from the ultraviolet ray irradiator 18. The irradiated ultraviolet rays U pass through the lower press plate 8 and strike the adhesive from below. At the same time, the ultraviolet rays U passing through the outer peripheral side of the superposed disc 30 are reflected by the reflective surface 6 on the inner surface of the chamber 6.
It is reflected by B, passes through the upper press plate 7, and hits the adhesive from above. That is, the ultraviolet rays U radiated from the lower side of the lower press plate 8 are blocked by the metal reflection film of the lower disc of the superposing disc 30 and only a small amount of light passes through the lower disc. Irradiation from only the adhesive does not sufficiently cure the adhesive. Therefore, the ultraviolet rays U are passed upward from the outer periphery of the superposing disc 30 and reflected by the reflection surface 6B so that the ultraviolet rays U are also hit from above the superposing disc 30. The amount of light emitted from above is about 30% of the total amount of light emitted. This accelerates the curing of the adhesive.

Next, after the same operation is performed in the second and third UV stations E and F, the laminated disc 30 is used as a laminated disc in which an adhesive is hardened, and the disc ejection station is used. Transported to G.
Here, the vacuum suction is stopped, air is introduced into the chamber-6, the pressure inside and outside the chamber-6 is made the same, and the chamber-6 is raised, that is, the vacuum is released.

Next, the bonded disc conveyed to the disc discharge station G is conveyed from here to the next step.

The time required for the rotary table 2 to make one turn is appropriately determined, and is adjusted in consideration of the suction / pressurization time, the ultraviolet irradiation time, and the like. Further, the degree of vacuum may be adjusted to a value other than the above value.

[0039]

As described in detail above, according to the first and third aspects of the present invention, the laminated disc having the adhesive between the one-side disc and the other-side disc is pressed by vacuuming. It Thereby, the air bubbles mixed in the adhesive or between the disks are discharged to the outside from the inside of the adhesive or between the disks by the pressure and vacuuming, and the air bubbles can be satisfactorily removed.

According to the second, fourth, and fifth aspects of the present invention, light is irradiated to cure the adhesive while pressurizing the overlapping discs by the vacuuming, so that the adhesive in the adhesive or Two discs can be attached to each other while air bubbles between the discs are well removed. This makes it possible to provide a highly accurate product in which bubbles are not mixed in the adhesive or between the disks when the bonded disk is a product.
In addition, the adhesive contracts during the curing process, but since the adhesive is cured while pressing the laminated disc, the contraction rate can be minimized. At the same time, it is possible to prevent deviation of the contracted position. Further, it is possible to prevent warp of the superposed discs and peeling of the metal reflection film due to local bias of the adhesive.

According to the sixth aspect of the invention, since the inner surface of the chamber is formed as a reflecting surface, ultraviolet rays are radiated from above the superposition disc, and the curing of the adhesive is easily promoted. In addition, the light irradiation time can be shortened and the adhesive can be satisfactorily cured within the pressing time of the disc.

[Brief description of drawings]

FIG. 1 is an enlarged view of a bonding apparatus for an optical recording information medium shown in an embodiment of the present invention when pressure is applied.

FIG. 2 is an enlarged view of the optical recording information medium bonding apparatus shown in the embodiment of the present invention before pressing.

FIG. 3 is an overall view of the optical recording information medium bonding apparatus shown in the embodiment of the present invention before pressing.

FIG. 4 is an overall view of the optical recording information medium bonding apparatus shown in the embodiment of the present invention when pressure is applied.

FIG. 5 is a plan view in which a part of the optical recording information medium bonding device shown in the embodiment of the present invention is omitted.

FIG. 6 is a side view in which a part of the optical recording information medium bonding apparatus shown in the embodiment of the present invention is omitted.

FIG. 7 is an enlarged view of an O-ring before pressing in the bonding apparatus for the optical recording information medium shown in the embodiment of the present invention.

FIG. 8 is an enlarged view of an O-ring when a pressure is applied to the optical recording information medium bonding device shown in the embodiment of the present invention.

[Explanation of symbols]

 1 Laminating Device 2 Rotation Table 4 Disk Pressing Device 5 Pressurizing Device Main Body 6 Chamber-7 Upper Press Plate 8 Lower Press Plate 9 O-ring 10 Shaft Part 15 Vacuum Tube 18 UV Irradiator P Internal Space U UV Light

Claims (6)

[Claims] 1. A superposed disc 3 comprising an adhesive agent sandwiched between optically recordable and reproducible discs on one side and the other side.
In the bonding method of No. 0, when the stacking disk 30 is positioned in the closed space and the closed space is evacuated, the bonded chamber 6 is a rigid body chamber-6 that forms the closed space. The O-ring 9 which seals the rigid chamber 6 is deformed by the pressure applied from the outside, and the overlapping disc 30 is moved by an amount corresponding to the reduction of the seal gap S caused by the deformation of the O-ring 9. A method for laminating an optical information recording medium, characterized in that air is sucked by pressurizing and thus vacuuming the air bubbles in the adhesive of the superposing disc 30 to the outside. 2. A photocurable adhesive is used as the adhesive,
With the superposition disc 30 under pressure,
2. The optical information recording according to claim 1, wherein the adhesive of the overlapping disc 30 is irradiated with light to cure the adhesive within a time when the overlapping disc 30 is being pressed. Method of pasting media. 3. A superposed disc 3 having an adhesive agent sandwiched between one side and the other side discs which are optically recordable / reproducible.
In the laminating apparatus 1 of No. 0, the laminating apparatus 1 includes a rigid chamber 6 which is evacuated while covering the laminating disc 30 and an upper press plate 7 which presses the laminating disc 30 from above.
And a lower press plate 8 for pressing the overlapping disc 30 from below, and the rigid chamber-6
Is movable in the vertical direction Z and defines an internal space P having a lower opening 6D, and the lower opening 6D has such a size that the superposing disc 30 can be accommodated in a horizontal state. And an O-ring 9 is attached to the lower end of the peripheral wall 6A that defines the internal space P,
The O-ring 9 is configured to seal the internal space P with a seal gap S between the lower end surface 6C of the peripheral wall 6A and the contact partner surface, and the upper press plate 7 is Fixed to the rigid chamber 6 above,
When the chamber 6 is evacuated, the lower press plate 8 is in contact with the superposing disc 30 from above, and the lower press plate 8 is in contact with the superposing disc 30 from below. Rigid chamber-6
Due to the external pressure applied to the superposing disc 30, the upper pressing plate 7 and the lower pressing plate 8 are
An optical information recording medium laminating apparatus, wherein pressure is applied from a state of being sandwiched between and by an amount corresponding to a reduction in the seal gap S due to deformation of the O-ring 9. 4. The upper press plate 7 and the lower press plate 8
Is a light-transmissive press plate, and the adhesive is a photo-curable adhesive, and a light irradiator for irradiating the overlapping disc 30 with light is installed below the lower press plate 8. The optical information recording medium according to claim 1, wherein the superposed disc 30 is configured to irradiate the light to cure the adhesive when the overlapping disc 30 is under pressure. Laminating device. 5. The apparatus for laminating an optical information recording medium according to claim 2, wherein the light irradiator is an ultraviolet irradiator 18, and the light-transmissive press plate is quartz glass. 6. The inner surface of the chamber 6 is formed with a reflecting surface 6B for reflecting the light emitted from the light irradiator and for applying the light from above the superposing disc 30. An optical information recording medium laminating apparatus according to claim 1 or 2.