JP2000357349A - Ultraviolet curing device for disk and method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an ultraviolet curing device for a disk which is capable of creating a pressurized state of a disk substrate by means of a simple and inexpensive device structure when irradiated with ultraviolet rays and effectively preventing the temperature rise of the disk substrate and its surrounding due to irradiation with ultraviolet rays. SOLUTION: A rotating body 2 is rotary-driven with a rotary drive mechanism 3 and a disk D, which is placed on a disk-placing base 4, is arranged in a position below a hollow container (an ultraviolet rays irradiation position U). The disk-placing base 4 is raised with an upwards and downwards moving mechanism 5, thereby introducing the disk D through a opening 13b on the lower surface side of the hollow container 13, pusing up a plate-like weight 15 while supporting the lower surface of the plate-like weight 15 on the disk D and pressurizing the disk D by gravity of the plate-like weight 15. At this state, an optical path opening/closing mechanism 11 is opened and the disk D is ivadiated with irradiating light (ultraviolet rays), whose heat ray component is removed with a reflection plate 8, a filter 12, etc., through an opening 13a on the upper surface side of the hollow container 13 and the ultraviolet rays-transmissible, plate-like weight 15, thus an ultraviolet ray setting resin of the disk D is hardened by irradiation with ultraviolet rays.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk manufacturing apparatus for manufacturing a disk which is a kind of recording media for information and images, and more particularly to a pair of disks bonded via an ultraviolet-curable adhesive. The present invention relates to an ultraviolet curing device for a disk, which fixes a pair of disk substrates to each other by irradiating the substrate with ultraviolet light, and a method therefor.

[0002]

2. Description of the Related Art Conventionally, as a method for manufacturing a disk by bonding a pair of disk substrates, a pair of disk substrates is bonded via an ultraviolet-curable adhesive, and then a pair of disks after bonding is formed. A method is known in which a pair of disk substrates is fixed to each other by sending the disk substrate to a disk ultraviolet curing device and curing the adhesive by irradiating ultraviolet rays.

Incidentally, in such a disk manufacturing method, in order to prevent deformation such as variation in thickness and warpage of a disk to be finally manufactured, an ultraviolet curable resin sandwiched between a pair of disk substrates is used. It is necessary to make the thickness of the adhesive uniform and to prevent the temperature of the disk substrate and its surroundings from rising due to the irradiation of ultraviolet rays. For this reason, in the prior art, for example,
Methods such as those described in JP-A-1820 and JP-A-10-199053 have been proposed.

Among these, Japanese Patent Application Laid-Open No. Hei 10-11820 discloses an ultraviolet curable adhesive as a method for making the thickness of an ultraviolet curable adhesive sandwiched between a pair of disk substrates uniform. A method is described in which a pair of disk substrates bonded together is sandwiched between a quartz table and a quartz lid, and a pair of disk substrates are irradiated with ultraviolet light through the quartz lid while pressing the disk substrate with the quartz lid. I have. In this method, a rotating table on which a plurality of quartz tables are arranged is rotated in a predetermined direction, and a pair of disk substrates is accommodated in each quartz table on the rotating table. A disk is manufactured by sequentially performing each step such as removal of a quartz lid.

Japanese Patent Laid-Open Publication No. Hei 10-199053 discloses a method for preventing the temperature of a disk substrate and its surroundings from rising due to the irradiation of ultraviolet rays. The disk mounting table on which a pair of disk substrates is mounted is made of aluminum. In addition to the method of improving the heat radiation of the disk mounting table made of a material with good thermal conductivity such as copper, solder, etc., the cooling gas is blown to the disk mounting table, and the disk mounting table and the rotary table on which the disk mounting table is arranged are used. A method of water cooling and the like are described.

[0006]

However, of the conventional methods described above, the method described in the above-mentioned Japanese Patent Application Laid-Open No. Hei 10-11820 shifts each quartz table on a rotary table before and after irradiation with ultraviolet rays. Since it is necessary to mount and remove the quartz lid using a mounting arm or the like, there is a problem that the structure of the apparatus becomes complicated and that the ultraviolet curing operation requires a long time.

In the method described in Japanese Patent Application Laid-Open No. Hei 10-199053, equipment for blowing a cooling gas to the disk mounting table and equipment for cooling the disk mounting table and the rotary table with water are required. There is a problem that the cost is increased. Further, in this method, since the disk substrate is simply cooled after the irradiation of the ultraviolet rays, there is a problem that the disk made of a heat-sensitive plastic or the like is affected by the heat during the irradiation of the ultraviolet rays.

The present invention has been made in view of the above points, and can provide a simple and inexpensive device structure for a pressurized state of a disk substrate when irradiating ultraviolet rays. It is an object of the present invention to provide an ultraviolet curing device for a disk and a method thereof that can effectively prevent a temperature rise of a substrate and its surroundings.

[0009]

According to the present invention, a first solution is to irradiate a pair of disk substrates bonded together via an ultraviolet-curable adhesive with ultraviolet rays to cure the adhesive. In the ultraviolet curing device for a disk for fixing the pair of disk substrates to each other, a disk mounting table for mounting the pair of disk substrates, and a hollow container installed above the disk mounting table,
A hollow container having an opening on each of the upper and lower surfaces,
An ultraviolet irradiation device that irradiates ultraviolet rays through an opening on the upper surface side of the hollow container, and an elevating mechanism that raises and lowers the disc mounting table, wherein the pair of the pair of the inside of the hollow container passes through an opening on the lower surface side of the hollow container An elevating mechanism for introducing the disk substrate, an ultraviolet-transparent pressing member provided in the hollow container, and a pressing member for pressing the pair of disk substrates introduced by the elevating mechanism; An ultraviolet curing device for a disk, comprising: an inert gas ejecting means for ejecting an inert gas into a container.

Here, in the above-mentioned first solution, the pressing member comprises a plate-shaped weight supported on a projecting member provided on the inner surface of the hollow container, and the plate-shaped weight is provided. Preferably, when the pair of disk substrates are introduced into the hollow container by the elevating mechanism, the supporting state on the projecting member is released and the pair of disk substrates is supported on the pair of disk substrates.

Further, in the above-mentioned first solution, the ultraviolet irradiation device removes a heat ray component from the irradiation light emitted by the ultraviolet light source, which emits irradiation light containing ultraviolet light. It is preferable to have a heat ray removing mechanism. Here, the heat ray removing mechanism includes a reflector disposed on an optical path of irradiation light emitted from the ultraviolet light source, and the reflector reflects an ultraviolet component of the irradiation light while transmitting a heat ray component. It is preferable that Further, the heat ray removing mechanism includes a filter disposed on an optical path of the irradiation light emitted from the ultraviolet light emitting source, and this filter blocks a heat ray component while transmitting an ultraviolet light component of the irradiation light. Preferably, there is. Further, it is preferable that the heat ray removing mechanism is a cooling mechanism for cooling the ultraviolet light emitting source. It is preferable that the ultraviolet irradiation device further includes an optical path opening and closing mechanism that opens and closes an optical path of irradiation light emitted from the ultraviolet light emitting source.

Further, in the above-mentioned first solving means, one of the plurality of disk mounting tables includes a disk-shaped rotating body in which a plurality of the disk mounting tables are arranged at predetermined positions on a circumference. It is preferable that the apparatus further comprises a rotation drive mechanism that rotates the rotating body so as to be selectively disposed below the hollow container.

Further, the present invention provides, as a second solving means,
A step of mounting a pair of disk substrates bonded together via an ultraviolet-curable adhesive on a disk mounting table, and a step of disposing the pair of disk substrates mounted on the disk mounting table below a hollow container And raising the disk mounting table, introducing the pair of disk substrates into the hollow container through an opening on the lower surface side of the hollow container, and using an ultraviolet-transparent pressing member provided in the hollow container. A step of pressurizing the pair of disk substrates, a step of injecting an inert gas into the hollow container, and an opening on an upper surface side of the hollow container while pressurizing the pair of disk substrates by the pressing member, and Irradiating the pair of disk substrates with ultraviolet light through an ultraviolet-transmissive pressing member; and lowering the disk mounting table so as to lower the pair of disks by the pressing member. Releasing the pressurized state of the disk substrate, and moving the pair of disk substrates mounted on the disk mounting table from below the hollow container, and curing the adhesive by irradiation with the ultraviolet light. Removing the substrate from the disk mounting table.

Here, the above-mentioned second solution preferably further includes a step of opening and closing the optical path of the ultraviolet light in accordance with the irradiation timing of the ultraviolet light.

According to the first and second means for solving the problems, according to the first and second aspects of the present invention, the plate-shaped plate arranged in the hollow container as the pair of disk substrates bonded to each other via the ultraviolet-curable adhesive is moved up and down. The pressurization of the disc substrate and the release of the pressurized state are performed by the weight, so that the pressurized state of the disc substrate during the irradiation of the ultraviolet rays can be created with a simple and inexpensive device structure.

According to the first and second means of the present invention, the heat ray component contained in the irradiation light emitted from the ultraviolet light source is removed by the heat ray removing mechanism. The surrounding temperature rise can be effectively prevented.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 are views for explaining an embodiment of an ultraviolet curing device for a disk according to the present invention.

First, the overall structure of the ultraviolet curing device for a disk will be described with reference to FIG. As shown in FIG.
The ultraviolet curing device for a disk includes a disk transport device 1 that transports a pair of disk substrates (hereinafter, also simply referred to as “disks”) D bonded together via an ultraviolet curing resin (an ultraviolet curing adhesive) in a circumferential direction. , Disk transport device 1
And an ultraviolet irradiation device 6 for irradiating the disk D arranged at the ultraviolet irradiation position U with ultraviolet light.

The disk transport device 1 includes a disk-shaped rotating body 2 and a rotation driving mechanism 3 for rotating the rotating body 2.
And A plurality of disk mounting tables 4 on which disks D are mounted are arranged at equal intervals on the same circumference of the rotating body 2, and each disk mounting table 4 is irradiated with ultraviolet light under rotation by the rotation driving mechanism 3. It is selectively arranged at the position U.

Here, a hollow container 13 having openings 13a and 13b on the upper and lower surfaces, respectively, is provided above the ultraviolet irradiation position U where each disk mounting table 4 is selectively disposed.
Is installed. Further, below the ultraviolet irradiation position U, a lifting mechanism 5 for raising and lowering the disk mounting table 4 is provided, and the disk D is introduced into the hollow container 13 through the opening 13 b on the lower surface side of the hollow container 13. Has become.

A plate-shaped weight (pressing member) 15 made of an ultraviolet-transmissive material is provided in the hollow container 13, and is supported on a projecting member 14 provided on the inner surface of the hollow container. I have. When the disk D is introduced into the hollow container 13 by the elevating mechanism 5, the plate-shaped weight 15 is released from the support state on the projecting member 14 and is supported on the disk D. Thus, the disk D can be pressurized. In addition, at a position of the hollow container 13 where the disk D is introduced by the elevating mechanism 5, an inert gas ejection path for ejecting an inert gas (nitrogen (N ₂ ) or the like) at substantially room temperature into the hollow container 13. (Inert gas ejection means) 16 is provided.

Further, the ultraviolet irradiation device 6 includes a hollow container 13.
The disk D can be irradiated with ultraviolet rays through an opening 13 a on the upper surface side of the hollow container 13 and a plate-shaped weight 15 made of an ultraviolet-transmissive material. The ultraviolet irradiation device 6
Has an ultraviolet light source 7 that emits irradiation light including ultraviolet light, and irradiates the irradiation light from the ultraviolet light source 7 inside the envelope 18 via the mirrors 9 and 10 to the opening on the upper surface side of the hollow container 13. 13a.

Here, in the vicinity of the ultraviolet light source 7 and on the optical path of the irradiation light emitted by the ultraviolet light source 7,
A reflection plate 8 and a filter 12 are provided as a heat ray removing mechanism, so that a heat ray component (infrared ray component, visible light, etc.) contained in the irradiation light emitted from the ultraviolet light emitting source 7 can be removed. . Among them, the reflection plate 8
Has an optical characteristic as shown in FIG. 4, for example, and reflects an ultraviolet component having a wavelength of about 250 nm to 500 nm in the irradiation light while transmitting a heat ray component having a wavelength of about 500 nm or more. The filter 12 has, for example, optical characteristics as shown in FIG. 5, and transmits an ultraviolet component having a wavelength of about 250 nm to 400 nm in the irradiation light while blocking a heat ray component having a wavelength of about 400 nm or more. Has become. The reflection plate 8 and the filter 12 can be arranged at arbitrary positions other than the positions shown in FIG. 1, and for example, the reflection plate 8 can be arranged at positions 9 and 10 shown in FIG.

Further, a cooling mechanism (heat ray removing mechanism) 17 for cooling the ultraviolet light source 7 is provided near the ultraviolet light source 7. As the cooling mechanism 17, for example, a cooling fan can be used. By lowering the temperature of the ultraviolet light source 7 by blowing outside air onto the surface of the ultraviolet light source 7, the heat ray component emitted by the ultraviolet light source 7 is reduced. You can do it.

Further, an optical path opening / closing mechanism (a heat ray removing mechanism) for opening / closing the optical path of the irradiation light emitted from the ultraviolet light source 7 is provided between the mirrors 9 and 10 in the optical path of the irradiation light emitted from the ultraviolet light source 7. ) 11 is provided so that the optical path of the irradiation light can be opened and closed in accordance with the irradiation timing of the irradiation light.

Next, the operation of the present embodiment having the above configuration will be described.

First, the ultraviolet irradiation device 6 is operated, and the ultraviolet light source 7 emits irradiation light containing ultraviolet light with the optical path opening / closing mechanism 11 closed.

In this state, first, the disk D is mounted on one of the plurality of disk mounting tables 4 arranged on the rotating body 2.

Next, the rotating body 2 is driven to rotate by the rotation driving mechanism 3, and the disk D mounted on the disk mounting table 4 is placed below the hollow container (ultraviolet irradiation position U).

Then, the disk mounting table 4 is raised by the elevating mechanism 5, and the disk D is introduced into the hollow container 13 through the opening 13b on the lower surface side of the hollow container 13. While supporting the lower surface of the weight 15 on the disk D, the plate-shaped weight 15 is pushed up (FIG. 2).
reference). Thus, the disk D is pressed by the weight of the plate-shaped weight 15.

In this state, the inert gas is jetted into the hollow container 13 through the inert gas jetting path 16,
The optical path opening / closing mechanism 11 is opened. When the optical path opening / closing mechanism 11 is opened, the irradiation light from the ultraviolet light emitting source 7 emits light to the mirrors 9 and 1.
The heat ray component contained in the irradiation light is guided through the cooling mechanism 17, the reflection plate 8, the filter 12, and the inert gas ejection path 16 through the opening 13 a on the upper surface side of the hollow container 13 through the air passage 0. Removed by active gas.
Thus, the irradiation light (ultraviolet light) from which the heat ray component has been removed is applied to the disk D pressed by the plate-shaped weight 15.
Is irradiated through the opening 13a on the upper surface side of the hollow container 13 and the plate-shaped weight 15 which is transparent to ultraviolet rays.

Then, after the ultraviolet curable resin is cured by irradiation of ultraviolet rays, the optical path opening / closing mechanism 11 is closed, and the disk mounting table 4 is lowered to release the pressurized state of the disk D by the plate-shaped weight 15 (FIG. 3).

Finally, the rotating body 2 is rotationally driven by the rotation driving mechanism 3 to move the disk D mounted on the disk mounting table 4 from below the hollow container 13 (ultraviolet irradiation position U). The hard disk D is removed from the disk mounting table 4.

As described above, according to the present embodiment, as the disk D is raised and lowered, the disk D is pressurized by the plate-shaped weight 15 disposed in the hollow container 13 and the pressurized state is released. , Disk D during ultraviolet irradiation
Can be created with a simple and inexpensive device structure.

Further, according to the present embodiment, the heat ray component contained in the irradiation light emitted from the ultraviolet light emitting source 7 is removed by the reflection plate 8, the filter 12 and the inert gas from the inert gas ejection path 16. Also, since the cooling mechanism 17 lowers the temperature of the ultraviolet light emitting source 7 to reduce the heat ray component emitted by the ultraviolet light emitting source 7, it is possible to effectively prevent the temperature rise of the disk D and its surroundings due to the irradiation of ultraviolet light. . Further, the optical path opening / closing mechanism 11 opens and closes the optical path of the irradiation light in accordance with the irradiation timing of the irradiation light, thereby minimizing unnecessary irradiation of ultraviolet rays. Can be prevented. Although the disk D is slightly heated by the irradiation light from which the heat ray component has been removed in this way, in the present embodiment, the heating is performed by the inert gas ejected from the inert gas ejection passage 16 and the rotating gas. The heat is dissipated by the flow of the outside air caused by the rotation of the rotating body 2 by the driving mechanism 3.

[0036]

As described above, according to the present invention, a disk is provided by a plate-shaped weight placed in a hollow container as the pair of disk substrates bonded to each other via an ultraviolet-curable adhesive is raised and lowered. Since the pressurization of the substrate and the release of the pressurized state are performed, the pressurized state of the disk substrate at the time of irradiation with ultraviolet rays can be created with a simple and inexpensive device structure. Further, since the heat ray component contained in the irradiation light emitted from the ultraviolet light emitting source is removed by the heat ray removing mechanism, it is possible to effectively prevent the temperature rise of the disk substrate and its surroundings due to the irradiation of the ultraviolet light.

[Brief description of the drawings]

FIG. 1 is a view showing the overall configuration of an embodiment of a disk ultraviolet curing apparatus according to the present invention.

FIG. 2 is a diagram showing a pressurized state of a disk in the ultraviolet curing device for a disk shown in FIG. 1;

FIG. 3 is a view showing a state where pressure is released from the disk in the ultraviolet curing device for a disk shown in FIG. 1;

FIG. 4 is a diagram showing optical characteristics of a reflector installed near an ultraviolet light source.

FIG. 5 is a diagram showing optical characteristics of a filter installed on an optical path of irradiation light.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 disk transport device 2 rotating body 3 rotation drive mechanism 4 disk mounting table 5 elevating mechanism 6 ultraviolet irradiation device 7 ultraviolet light source 8 reflector (reflector (heat ray removing mechanism) 9, 10 mirror 11 optical path opening / closing mechanism 12 filter (heat ray removing mechanism) 13 Hollow container 14 Projecting member 15 Plate-shaped weight (pressing member) 16 Inert gas ejection path 17 Cooling mechanism (Heat ray removing mechanism) 18 Enclosure D Disk

Claims (10)

[Claims] An ultraviolet curing device for a disk, wherein a pair of disk substrates bonded together via an ultraviolet-curable adhesive is irradiated with ultraviolet rays and the adhesive is cured to fix the pair of disk substrates to each other. A disk mounting table on which the pair of disk substrates are mounted; a hollow container installed above the disk mounting table; a hollow container having openings on upper and lower surfaces, respectively; and an upper surface side of the hollow container. An ultraviolet irradiation device for irradiating ultraviolet light through an opening of the disk mounting table, and a lifting mechanism for raising and lowering the disk mounting table, wherein the lifting and lowering mechanism introduces the pair of disk substrates into the hollow container through an opening on the lower surface side of the hollow container. A mechanism, and an ultraviolet-transmissive pressure member provided in the hollow container, wherein the pair of the pair introduced by the elevating mechanism And a disk substrate pressurizing pressure member, an ultraviolet curing apparatus for a disc, characterized in that a inert gas injection means for injecting an inert gas into the hollow vessel. 2. The pressure member comprises a plate-shaped weight supported on a projecting member provided on the inner surface of the hollow container, and the plate-shaped weight is moved by the lifting mechanism to the pair of disk substrates. 2. The ultraviolet curing device for a disk according to claim 1, wherein the support state on the protruding member is released when the substrate is introduced into the hollow container, and is supported on the pair of disk substrates. 3. The ultraviolet irradiation apparatus according to claim 1, further comprising an ultraviolet light source for emitting irradiation light including ultraviolet light, and a heat ray removing mechanism for removing a heat ray component from the irradiation light emitted by the ultraviolet light source. The ultraviolet curing device for a disk according to claim 1, wherein 4. The heat ray removing mechanism comprises a reflector for reflecting the irradiation light emitted from the ultraviolet light source, and the reflector reflects an ultraviolet component of the irradiation light while transmitting a heat ray component. The ultraviolet curing device for a disk according to claim 3, wherein: 5. The heat ray removing mechanism comprises a filter arranged on an optical path of irradiation light emitted from the ultraviolet light source, and this filter transmits an ultraviolet ray component of the irradiation light while blocking a heat ray component. The ultraviolet curing device for a disk according to claim 3, wherein the ultraviolet curing device is used. 6. An ultraviolet curing apparatus for a disk according to claim 3, wherein said heat ray removing mechanism is a cooling mechanism for cooling said ultraviolet light emitting source. 7. The ultraviolet curing device for a disk according to claim 3, wherein said ultraviolet irradiation device further comprises an optical path opening and closing mechanism for opening and closing an optical path of irradiation light emitted from said ultraviolet light emitting source. 8. A disk-shaped rotating body in which a plurality of disk mounting tables are arranged at predetermined positions on a circumference, and one of the plurality of disk mounting tables is selectively arranged below the hollow container. 2. The ultraviolet curing device for a disk according to claim 1, further comprising: a rotation drive mechanism for rotatingly driving the rotating body. 9. A step of mounting a pair of disk substrates bonded together via an ultraviolet-curable adhesive on a disk mounting table, and mounting the pair of disk substrates mounted on the disk mounting table in a hollow container. Arranging the pair of disk substrates into the hollow container through an opening on the lower surface side of the hollow container by raising the disk mounting table, and transmitting ultraviolet light provided in the hollow container. Pressurizing the pair of disk substrates with a pressing member; blowing an inert gas into the hollow container; and pressing the pair of disk substrates with the pressing member while the upper surface of the hollow container is pressed. Irradiating the pair of disk substrates with ultraviolet light through the opening of the optical disk and the ultraviolet light-transmitting pressing member; Releasing the pressurized state of the pair of disk substrates, and moving the pair of disk substrates mounted on the disk mounting table from below the hollow container, and curing the adhesive by the ultraviolet irradiation. Removing the pair of disk substrates from the disk mounting table. 10. The ultraviolet curing method for a disk according to claim 9, further comprising the step of opening and closing an optical path of the ultraviolet light in accordance with the irradiation timing of the ultraviolet light.